DUCTLED MINI SPLIT SYSTEM AIR CONDITIONER / HEAT PUMP
RYB-20 Inverter Series
For 36,000-48,000 BTU/hr Systems
Quantum Ultra (R-454B) - RB Indoor and YN Outdoor
Installation &
User Manual
IMPORTANT NOTICE:
Read this manual carefully before installing or
operating your new air conditioning system. Be
sure to save this manual for future reference.
1
Table of Contents
Air Conditioner Installation & User Manual
Read this Manual
The manual provides helpful hints on using and maintaining the air conditioner properly. Performing preventive care can save time and
money over the lifespan of the air conditioner. These instructions may not cover every possible condition of use, so common sense and
attention to safety is required when installing, operating, and maintaining this product.
7 Commission..................................... 73
T
Troubleshooting...............................
80
9 Maintenance..................................... 78
8 Operating Instructions...................... 75
2
1 Safety Precautions........................... 3
2 Product Overview.............................
18
3 Unpacking & Packing.......................
25
70
4 Installation Overview........................ 26
5 Installation........................................ 29
6
Leak Checks & Test Run.................
Air Conditioner Installation & User Manual
Safety Precautions
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It is important to read this section before operating and installing the system. Incorrect installation due to
ignoring instructions can cause serious damage or injury. The seriousness of potential damage and injuries
is classified as either a warning or caution.
Explanation of Symbols
WARNING
This symbol indicates the possibility of personal injury or loss of life.
CAUTION
This symbol indicates the possibility of property damage or serious consequences.
WARNING
Children aged 8 and above, as well as individuals with lack of experience or reduced physical, sensory, or
mental capabilities can use the appliance if supervision or instruction is given. Do not allow children to play with
or near the appliance. Children or untrained personnel should be restricted from cleaning and performing
maintenance on the appliance, unless they're given supervision.
WARNINGS FOR PRODUCT USE
• Turn off the air conditioner and disconnect the power before cleaning, installing, or repairing the system.
Failure to do so can cause electric shock.
• If an abnormal situation arises (such as a burning smell), immediately turn off the unit and disconnect the
power. Call the dealer for instructions to avoid electrical shock, fire, or injury.
• Do not insert fingers, rods, or other objects into the air inlet or outlet. This could cause injury because the fan
rotates at high speeds.
• Do not use flammable sprays such as hair spray, lacquer, or paint near the unit. This could cause fire or
combustion.
• Do not operate the air conditioner in locations near or around combustible gases. Emitted gas may collect
around the unit and cause an explosion.
• Do not operate the air conditioner in a wet room such as a bathroom or laundry room. Too much exposure to
water can cause electrical components to short circuit.
• Do not expose your body directly to cool air for prolonged durations of time.
• If the air conditioner is used together with burners or other heating devices, thoroughly ventilate the room to
avoid oxygen deficiency.
• In certain functional environments (such as kitchens, server rooms, etc.), it is highly recommended to use
specifically designed air-conditioning units.
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WARNINGS FOR PRODUCT INSTALLATION
• Turn off the air conditioner and disconnect its power supply before installing or repairing the system. Failure to
do so can cause electric shock.
• An authorized dealer or specialist must perform the installation. Incorrect installation can cause water leakage,
electrical shock, or fire.
• Perform the installation according to the instructions in this manual. Improper installation can cause water
leakage, electrical shock, or fire.
• Contact an authorized service technician to maintain and repair the unit.
• Install the appliance in accordance with national wiring regulations. Only use the included accessories, parts,
and specified parts for installation. Using non-standard parts can cause water leakage, electrical shock, fire, or
unit failure.
• Install the unit in a firm location that can support the unit's weight. If the chosen location cannot support the
unit's weight or the installation is done incorrectly, the unit may drop and cause serious injury or damage.
• For units with an auxiliary electric heater, do not install the unit within 3 feet (1 m) of any combustible materials.
• For units that have a wireless network function (USB device access replacement), professional staff must carry
out the maintenance operations.
• Do not install the unit in a location that may be exposed to combustible gas leaks. If combustible gas
accumulates around the unit, it could cause fire.
• Do not turn on the power until all work has been completed.
• When moving or relocating the air conditioner, consult experienced service technicians for the disconnection
and reinstallation of the unit.
ELECTRICAL WARNINGS
• Only use the specified wire. If the wire is damaged, it must be replaced by the manufacturer, service agent, or
a similarly qualified individual in order to avoid a hazard.
• Properly ground the product during installation to avoid electrical shock.
• Incorporate disconnections in the fixed wiring, according to the wiring rules.
• Do not share the electrical outlet with other appliances. Improper or insufficient power supply can cause fire or
electric shock.
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• For all electrical work, follow the local and national wiring standards, regulations, and installation manual.
Connect the cables tightly, then clamp them securely to prevent external forces from damaging the terminal.
Improper electrical connections can result in electrical shock or fire. Complete the electrical connections
according to the Electrical Connection diagrams located on the panels of the indoor and outdoor units.
• Properly arrange all wiring to ensure the control board cover can close correctly. If the control board cover is
not closed properly, it can lead to corrosion and cause the connection points on the terminal to heat up and
catch fire. It can also cause electrical shock.
• If connecting power to fixed wiring, incorporate an all-pole disconnection device in the fixed wiring. Ensure the
device is in accordance with the wiring rules.
• Turn off the air conditioner and disconnect the power if the unit will not be used for a long duration of time.
• Turn off and unplug the unit during storms.
• Make sure that water condensation can drain unhindered from the unit.
• Do not operate the air conditioner with wet hands. This may cause electrical shock.
• Do not use the device for any other purpose than its intended use.
• Do not climb onto or place objects on top of the outdoor unit.
• Do not allow the air conditioner to operate for long periods of time with doors or windows open, or if the
humidity is considerably high.
Fuse Specifications
The air conditioner's circuit board (PCB) is designed with a fuse to provide overcurrent protection. The
specifications of the fuse are printed on the circuit board. For example: T3.15AL/250VAC, T5AL/250VAC,
T3.15A/250VAC, T5A/250VAC, T20A/250VAC, T30A/250VAC, etc.
Only use the blast-proof ceramic fuse.
CAUTION
CLEANING & MAINTENANCE WARNINGS
• Turn off the device and disconnect its
power supply
before cleaning. Failure to do so can cause an electrical
shock.
• Do not clean the air conditioner with excessive amounts of water.
• Do not clean the air conditioner with combustible cleaning agents. Combustible cleaning agents can cause
fire or deformation.
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R-454B refrigerant charge amount and minimum room area:
The machine you purchased may be one of the types listed in the table below. The indoor and outdoor units are
designed to be used together. Check the machine that was purchased. Install the indoor unit at least 7-feet, 6-½-
inches (2.3 m) above the floor. The height of the room cannot be less than the indoor unit's installed height.
Room Size Restriction
The appliances are connected via an air duct system to one or more rooms. The bottom of the air duct outlet
must be at least 7-feet, 2-⅝-inches (2.2 m) above the floor. In UL/CSA 60335-2-40, the R-454B refrigerant is
classified as mildly flammable, which limits the room area of the system service. Similarly, the total refrigerant
amount must not exceed the maximum allowable refrigerant charge, is based on the room area the system
services.
The following are explanations for the nouns in this section:
• Mc: The actual refrigerant charge in the system.
• A: The actual room area where the appliance is installed.
• Amin: The required minimum room area.
• Mmax: The allowable maximum refrigerant charge in a room.
• Qmin: The minimum circulation airflow.
• Anvmin: The minimum opening area for connected rooms.
• TAmin: The total area of the conditioned space (For appliances serving one or more rooms with an air duct
system).
• TA: The total area of the conditioned spaced connected by air ducts.
WARNING FOR USING FLAMMABLE REFRIGERANTS
• Do not use means to accelerate the defrosting and cleaning processes, other than those recommended by
the manufacturer.
• Store the appliance in a room without continuously operating ignition sources. For example: open flames, an
operating gas appliance, or an operating electric heater.
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odor.
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Refrigerant Charge & Room Area Limitations
For the purpose of determining the room area (A) when calculating the maximum allowable refrigerant charge
(Mmax) in an unventilated space, the following shall apply:
Room area (A) refers to the floor projection enclosed by the walls, partitions, and doors of the installation space.
Spaces connected solely by drop ceilings, ductwork, or similar features should not be considered a single space.
For units mounted higher than 5-feet, 10-⅞-inches (1.8 m), spaces divided by partition walls no higher than 5-
feet, 3-inches (1.6 m) should be considered a single space.
For fixed appliances, rooms on the same floor and connected by an open passageway can be considered a
single room when determining compliance to Amin, provided the passageway meets all of the following criteria:
• It is a permanent opening.
• It extends to the floor.
• It is intended for people to walk through.
For fixed appliances, the area of adjacent rooms on the same floor connected by permanent wall or door
openings — including gaps between walls and floors — can be considered a single room when determining
compliance with.
The space must have appropriate openings according to Sec. 2. The minimum opening area for natural
ventilation (Anvmin) must not be less than the following:
Height of outlet/m Mc/Kg
Mmax/kg
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
5 6.0 1.628 0.108
6 6.0 1.954 0.100
7 6.0 2.279 0.092
8 6.0 2.605 0.084
9 6.0 2.930 0.076
10 6.0 3.256 0.068
11 6.0 3.582 0.060
12 6.0 3.907 0.052
13 6.0 4.233 0.044
14 6.0 4.493 0.038
15 6.0 4.651 0.034
16 6.0 4.803 0.031
17 6.0 4.951 0.027
Take the Mc=6.0kg as an example. For appliances serving one or more rooms via an air duct system, the room
area shall be determined based on the total area of the conditioned space connected by those ducts. Note that
the circulating airflow from the integral indoor fan will mix and dilute any leaking refrigerant before it enters any
room.
A/m
2
Anvmin/m
2
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Opening Conditions for Connected Rooms
When the openings for connected rooms are required, apply the following conditions:
• The area of any openings more than 11-¾ inches (300 mm) above the floor should not be considered when
determining compliance with Anvmin.
• At least 50% of the required opening area Anvmin should be below 7-¾ inches (200 mm) from the floor.
• Install the unit so the bottom of the lowest opening is no higher than the point of release and no more than 3-
⅞ inches (100 mm) from the floor.
• Openings are permanent openings which cannot be closed.
• For openings extending to the floor, the height should not be less than ¾ of an inch (20 mm) above the
surface of the floor covering.
• A second, higher opening must be provided. This opening should be at least 50% of the minimum area
required for Anvmin and must be positioned at least 4-feet, 11-inches (1.5 m) above the floor. The
requirement for the second opening can be met by drop ceilings, ventilation ducts, or similar features that
provide an airflow path between connected rooms.
• The total area of the room where refrigerant can leak, including any connected adjacent rooms, must be at
least TAmin.
• The room area in which the unit is installed should not be less than 20% of TAmin.
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m
c
or m
REL
[ozs/kg]
7.6/2.3 7.9/2.4 8.6/2.6 9.2/2.8
<=62.6/1.776
Area
formula
h
inst
[ft/m]
12/1.10
63.4/1.8
70.5/2.0
77.5/2.2
84.6/2.4
91.7/2.6
98.7/2.8
105.8/3.0
112.8/3.2
119.9/3.4
126.9/3.6
134/3.8
141.0/4.0
148.1/4.2
155.1/4.4
162.2/4.6
169.2/4.8
176.3/5.0
47/4.35
52/4.83
58/5.31
63/5.80
68/6.28
73/6.76
78/7.24
84/7.73
89/8.21
94/8.69
99/9.17
104/9.66
110/10.14
115/10.62
120/11.11
125/11.59
130/12.07
51/4.68
56/5.20
62/5.72
68/6.24
73/6.76
79/7.28
84/7.80
90/8.32
96/8.84
101/9.36
107/9.88
118/10.92
124/11.44
129/11.96
135/12.48
140/13.00
55/5.07
61/5.64
67/6.20
73/6.76
79/7.32
85/7.89
91/8.45
97/9.01
104/9.58
110/10.14
122/11.27
128/11.83
134/12.39
140/12.96
146/13.52
152/14.08
6.0~7.3/
1.8~2.2
60/5.53
67/6.15
73/6.76
80/7.38
86/7.99
93/8.60
100/9.22
106/9.83
113/10.45
120/11.06
126/11.68
133/12.29
139/12.90
146/13.52
153/14.13
159/14.75
166/15.36
57/5.29
64/5.88
70/6.47
83/7.64
89/8.23
95/8.82
102/9.41
108/9.99
114/10.58
121/11.17
127/11.76
133/12.34
140/12.93
146/13.52
152/14.11
159/14.69
76/7.06
9.9/3.0
44/4.06
49/4.51
54/4.96
59/5.41
64/5.86
68/6.31
73/6.76
78/7.21
83/7.66
88/8.11
93/8.56
97/9.01
102/9.46
107/9.91
112/10.37
117/10.82
122/11.27
112/10.40
116/10.70
A
min
[ft
2
/ m
2
]
• A
min
is the required minimum room area in ft
2
/m
2
.
• M
c
is the actual refrigerant charge in the system in oz/kg
• M
REL
is the refrigerant releasable charge in oz/kg (applicable to the units with refrigerant
sensors only)
• h
inst
is the height of the bottom of the appliance relative to the floor of the room after
installation.
WARNING: The minimum room area or minimum room of conditioner space is based on the
releasable charge and total system refrigerant charge.
Model
Nominal air
volume
36K 48K
1176CFM
2000m
3
/h
1588CFM
2700m
3
/h
When the unit detects a refrigerant leak, the minimum airflow of the indoor unit is the following:
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1. Installation (Where refrigerant pipes are allowed)
• Any individual who is involved with working on or breaking into a refrigerant circuit must hold a valid certificate
from an industry-accredited assessment authority. The certificate authorizes the individual's competence for
handling refrigerants safely in accordance with the specifications of an industry recognized assessment.
• Maintenance and repairs requiring the assistance of other skilled personnel must be carried out under the
supervision of the individual competent in the use of flammable refrigerants.
• Keep the installation of the pipe-work to a minimum.
• Protect the pipe-work from physical damage.
• Ensure the refrigerant pipes comply with national gas regulations.
• Ensure the mechanical connections are accessible for maintenance purposes.
• Do not allow foreign matter (oil, water, etc.) from entering the piping. In addition, when storing the piping,
securely seal the opening by pinching, taping, etc.
• Competent individuals must carry out all working procedures that affect safety.
• Store the appliance in a well-ventilated area where the room size corresponds to the room area as specified
for operation.
• Test the joints using detection equipment with a capability of 5g/year of refrigerant or better. After installation,
ensure the equipment is at a standstill and maintained under operating pressure, or at least the minimum
standstill pressure.
• In cases that require mechanical ventilation, ensure the ventilation openings are kept clear of obstruction.
• Leak Detection System Installed: Power the unit except for service. For units with refrigerant sensors, if a leak
is detected, the indoor unit will display an error code and buzz, the outdoor compressor will stop immediately,
and the indoor fan will run. The refrigerant sensor's service life is 15 years. When the refrigerant sensor
malfunctions, the indoor unit will display the "FHCC" error code. The refrigerant sensor cannot be repaired
and can only be replaced by the manufacturer. Replace the sensor with one specified by the manufacturer.
This is only applicable for units with refrigerant sensors.
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2. When using a flammable refrigerant, the requirements for the installation space and ventilation are
determined by the following criteria:
o Mass charge amount (M) used in the appliance.
o Installation location.
o Ventilation type of the location or appliance.
• Protect the piping material and pipe routing from physical damage during operation and service. Ensure the
piping material and pipe routing are in compliance with national and local codes and standards, such as
ASHRAE 15, IAPMO Uniform Mechanical Code, ICC International Mechanical Code, or CSA B52. All field
joints must be accessible for inspection prior to being covered or enclosed.
• Protect piping, fittings, and protection devices from adverse environmental effects. For example, water
collecting and freezing in relief pipes or the accumulation of dirt and debris.
• Ensure the piping in the refrigerant system is designed and installed to minimize the likelihood of hydraulic
shock damaging the system.
• Before applying any insulation, protect the steel pipes and components against corrosion with a rustproof
coating.
• Take precautions to avoid excessive vibration or pulsation.
• The minimum floor area of the room is mentioned in the form of a table or single figure without reference to a
formula.
• After completing the field piping for split systems, pressure test the field pipework with an inert gas. Then,
vacuum test the pipework before refrigerant charging. Ensure the testing is completed according to the
following requirements:
a. The minimum test pressure for both the high and low sides must match their respective design pressures,
unless the high side cannot be isolated from the low side. If the high side cannot be isolated from the low side
of the system, the entire system must be pressure tested to the low-side design pressure.
b. After removing the pressure source, maintain the test pressure for at least 1 hour, ensuring there is no
decrease of pressure, which is indicated by the test gauge. Ensure the test gauge resolution does not exceed
5% of the test pressure.
c. During the evacuation test, after achieving a vacuum level specified in the manual, isolate the refrigeration
system from the vacuum pump and ensure the pressure does not rise above 1,500 microns within 10 minutes.
The appropriate vacuum pressure level is specified in the manual, and must not be less than 500 microns or
the value required for compliance with national and local codes and standards. The codes and standards may
vary between residential, commercial, and industrial buildings.
• Field-made refrigerant indoor joints must be tightness tested according to the following requirements: The test
method must have a sensitivity of 5 grams per year of refrigerant or better under a pressure of at least 0.25
times the maximum allowable pressure. No leak should be detected.
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3. Qualification of Workers
The working personnel must be qualified to perform any maintenance, service, and repair operations. Competent
individuals must carry out working procedures that affect safety means. The competent individual must complete
the training by national training organizations or manufacturers that are accredited to teach the relevant national
competency standards set in legislation. The individual's competence must be documented by a certificate. All
training must follow the ANNEX HH requirements of UL 60335-2-40 4th Edition.
Examples for such working procedures are:
o Breaking into the refrigerating circuit.
o Opening sealed components.
o Opening ventilated enclosures.
4. Cabling
Confirm the cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges, or any
other adverse environmental effects. The check should also take into account the effects of aging or continual
vibration from sources such as compressors or fans.
Servicing Information
1. Inspect the Area
Before working on systems containing flammable refrigerants, safety checks are required to ensure the risk of
ignition is minimized.
2. Work Procedure
To minimize the risk of flammable gas or vapor presence, conduct work using controlled procedures.
3. General Work Area
Inform all maintenance staff and individuals working in the local area about the nature of the work being
performed. Avoid working in confined spaces. Section off the area around the workspace. Ensure the area is
safe by controlling the flammable materials.
4. Check for Refrigerant
Check the area with an appropriate refrigerant detector before and during work to ensure the technician is aware
of potentially flammable atmospheres. Ensure the leak detection equipment is suitable for flammable
refrigerants, i.e. non-sparking, adequately sealed, or intrinsically safe.
5. Fire Extinguisher
If conducting hot work on the refrigeration equipment or any associated parts is needed, appropriate fire
extinguishing equipment must be available. Keep a dry powder or CO
2
fire extinguisher adjacent to the charging
area.
6. No Ignition Sources
Individuals carrying out work involving exposed pipework on a refrigerant system are prohibited from using any
sources of ignition that may lead to a risk of fire or explosion. All possible ignition sources, such as cigarette
smoking, must be performed at a sufficient distance from the installation or maintenance site. Before conducting
work on the equipment, the surrounding area must be surveyed to ensure there are no flammable hazards or
ignition risks. No Smoking signs must be displayed.
7. Well-Ventilated Area
Ensure the area is open and well-ventilated before accessing the system or performing any work that generates
heat. Ventilation must be maintained to a certain degree while work is being carried out. The ventilation should
safely disperse any released refrigerant and expel it externally into the atmosphere.
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8. Inspect the Refrigeration Equipment
When changing electrical components, they must be fit-for-purpose and meet the correct specifications. Follow
the manufacturer's maintenance and service guidelines at all times. If in doubt, consult the manufacturer's
technical department for assistance.
For installations using flammable refrigerants, check the following:
o Ensure the charge size is appropriate for the room in which the refrigerant-containing parts are installed.
o Confirm the ventilation machinery and outlets are operating adequately and not obstructed.
o If an indirect refrigerating circuit is being used, check the secondary circuit for the presence of refrigerant.
o Confirm the equipment markings are visible and legible. Correct markings and signs that are illegible.
o Install the refrigeration pipe or components in a position that minimizes the risk of corrosion from harmful
substances, unless constructed of corrosion-resistant materials and suitably protected.
9. Inspect the Electrical Devices
Repairing and maintaining electrical components must include initial safety checks and component inspections.
If a fault exists that could compromise safety, do not connect the electrical supply to the circuit until the fault is
resolved. If the fault cannot be immediately corrected but it is necessary to continue operation, a temporary
solution must be implemented. If a temporary solution is implemented, it must be reported to the owner of the
equipment, ensuring both parties are informed.
Initial safety checks must include the following:
10. Replace Sealed Electrical Components If Damaged.
11. Replace Intrinsically Safe Components If Damaged.
12. Cabling
Confirm the cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges, or any
other adverse environmental effects. The check should also take into account the effects of aging or continual
vibration from sources such as compressors or fans.
o Confirm the capacitors are discharged. Ensure that this is done in a safe manner to avoid the possibility of
sparking.
o Ensure that no live electrical components and wiring are exposed while charging, recovering, or purging the
system.
o Confirm there is continuity of earth bonding.
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13. Detection of Flammable Refrigerants
Do not use potential sources of ignition for searching or detecting refrigerant leaks. Do not use a halide torch or
detector using a naked flame. Ensure the detector is not a potential source of ignition and is suitable for the
refrigerant used. Leak detection equipment must be set at a percentage of the refrigerant LFL, and calibrated to
the refrigerant employed. Confirm the appropriate percentage of gas (25% maximum).
The following leak detection methods are deemed acceptable for refrigerant systems:
Electronic leak detectors: This detector can detect refrigerant leaks. However, in the case of flammable
refrigerants, the sensitivity may not be adequate and need recalibration. Calibrate the detection equipment in a
refrigerant-free area.
Leak detection fluids: The bubble method and fluorescent method agents are examples of leak detection fluids.
These are suitable to use with most refrigerants. Avoid using detergents containing chlorine as the chlorine may
react with the refrigerant and corrode the copper pipe-work.
If a leak is suspected, remove or extinguish all naked flames.
If a refrigerant leak is found and requires brazing, recover all the refrigerant from the system or use the shut off
valves to isolate the refrigerant in a part of the system remote from the leak.
14. Removal & Evacuation
Use conventional procedures when breaking into the refrigerant circuit. However, for flammable refrigerants, it is
important to follow this best practice since flammability is a consideration.
Follow this procedure:
o Safely remove refrigerant following local and national regulations.
o Evacuate.
o Purge the circuit with inert gas (optional for A2L).
o Evacuate (optional for A2L).
o Continuously flush or purge with inert gas when using a flame to open the circuit.
o Open the circuit.
Recover the refrigerant charge into the correct recovery cylinders if venting is not allowed by local and national
codes. For appliances containing flammable refrigerants, purge the system with oxygen-free nitrogen to render
the appliance safe from flammable refrigerants. If needed, repeat this process several times. Do not use
compressed air or oxygen to purge refrigerant systems.
For appliances containing flammable refrigerants, purge the refrigerant by breaking the vacuum in the system
with oxygen-free nitrogen and continuing to fill until the working pressure is achieved. Then, vent to atmosphere
and finally pull down to a vacuum (optional for A2L). Repeat this process until no refrigerant is within the system
(optional for A2L). When using oxygen-free nitrogen, vent the system down to atmospheric pressure to enable
work to take place. Ensure the outlet for the vacuum pump is not close to any potential ignition sources and
ventilation is available.
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15. Charging Procedures
In addition to conventional charging procedures, follow these requirements:
o Use only appropriate tools when completing work. In case of uncertainty, consult the manufacturer of the
tools for use with flammable refrigerants.
o Ensure the contamination of different refrigerants does not occur when using charging equipment. Hoses or
lines must be as short as possible to minimize the amount of refrigerant contained in them.
o Keep the cylinders upright.
o Ensure the refrigerant system is earthed before charging the system with refrigerant.
o Label the system when charging is complete (if not already).
o Take extreme care to not overfill the refrigeration system.
o Prior to recharging the system, it must be pressure tested with oxygen-free nitrogen. Leak test the system
after completing the charging but prior to commissioning. Carry out a follow-up leak test before leaving the
site.
16. Decommissioning
Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment
and all its details. It is recommended good practice that all refrigerants are recovered safely. Prior to carrying out
the task, take an oil and refrigerant sample in case an analysis is required prior to re-using the recovered
refrigerant. It is essential that electrical power is available before the task is commenced.
a) Become familiar with the equipment and its operations.
b) Isolate the system electrically.
c) Before attempting the procedure ensure that:
o Mechanical handling equipment is available for handling refrigerant cylinders.
o All personal protective equipment is available and being used correctly.
o A competent individual is supervising the recovery process at all times.
o Recovery equipment and cylinders conform to the appropriate standards.
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17. Labeling
Label the equipment stating that it has been de-commissioned and emptied of refrigerant. Make sure to date and
sign the label. For appliances containing flammable refrigerants, ensure there are labels on the equipment
stating it contains flammable refrigerant.
18. Recovery
When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good
practice to remove refrigerants safely. When transferring refrigerant into cylinders, ensure that only appropriate
refrigerant recovery cylinders are employed. Ensure the correct number of cylinders for holding the total system
charge are available. Designate all the cylinders intended to be used for the recovered refrigerant and label them
for that refrigerant (i.e., special cylinders for the recovery of refrigerant). Cylinders must be complete with
pressure-relief valves. The associated shut-off valves must be in working order. Evacuate empty recovery
cylinders and, if possible, allow them to cool before recovery occurs.
The recovery equipment must be in working condition with a set of instructions concerning the equipment that is
at hand. In addition, the recovery equipment must be suitable for the recovery of the flammable refrigerant. If in
doubt, consult the manufacturer. In addition, a set of calibrated weighing scales must be available and in
working order. Hoses must be complete with leak-free disconnect couplings and in good condition.
The recovered refrigerant must be processed according to local legislation in the correct recovery cylinder. In
addition, the relevant waste transfer note must be arranged. Do not mix refrigerants in the recovery unit and
especially not in the cylinders.
When removing compressors or oils, ensure they are evacuated to a level that prevents flammable refrigerant
from remaining in the lubricant. The compressor body must not be heated by an open flame or other ignition
sources to accelerate this process. When oil is drained from a system, it must be carried out safely.
d) Pump down the refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold so that the refrigerant can be removed from various parts of the
system.
f) Make sure the cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate it in accordance with the instructions.
h) Do not overfill cylinders (no more than 80% volume liquid charge).
i) Do not exceed the maximum working pressure of the cylinder, even temporarily.
j) When the cylinders have been filled correctly and the process is completed, make sure the cylinders and
equipment are removed from the site promptly and all isolation valves on the equipment are closed off.
k) Do not charge recovered refrigerant into another refrigeration system, unless it has been cleaned and
checked.
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Air Conditioner Installation & User Manual
Safety Precautions
1
CAUTION
WARNING
This symbol shows that this appliance uses a flammable
refrigerant. If the refrigerant is leaked and exposed to an
external ignition source, there is a risk of fire.
This symbol shows that the operation manual should be read
carefully.
This symbol shows that information is available such as
the operating manual or installation manual.
This symbol shows that a service personnel should be
handling this equipment with reference to this manual.
Explanation of symbols displayed on the indoor or outdoor units
CAUTION
CAUTION
CAUTION
19. Transportation, Marking, & Storage for Units
o Transport equipment containing flammable refrigerants (Compliance with the transport regulations).
o Mark the equipment using signs (Compliance with local regulations).
o Dispose of equipment using flammable refrigerants (Compliance with national regulations).
o Store the equipment/appliance (Compliance with the manufacturer's instructions).
o Store packed (unsold) equipment. Construct the storage package protection in a way that potential
mechanical damage to the equipment inside the package will not cause a leak of the refrigerant charge.
Local regulations determine the maximum amount of equipment permitted to be stored together.
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Air Conditioner Installation & User Manual
Product Overview
2
Model
Indoor Unit Outdoor Unit
36K RB036GMSILDFHG
48K RB048GMSILDFHG
YN036GMSI20RUG
YN048GMSI20RUG
Full System
RYB036GMSI20RL
RYB048GMSI20RL
Model Numbers
Note
Serial numbers are typically located behind the electronic control box cover cap of each unit.
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Air Conditioner Installation & User Manual
Product Overview
2
Refrigerant Piping
(purchase separately)
Outdoor unit (A)
Outdoor unit (B)
5
7
8
Air inlet
1
2
Air outlet
Electric control box
Drain pipe
3
4
6
Communication cable
(purchase separately)
9
10
Remote controller
(purchase separately)
Remote controller holder
(purchase separately)
11
Wired remote controller
Notes
• Illustrations in this manual are for explanatory purposes. The actual shape of the indoor unit may be
slightly different. The actual shape shall prevail.
• Select a service disconnect meeting the requirements of the local, regional, and national codes.
Part Names
19
Product Overview
2
W
D
H
W D H
Dimensions
Indoor Unit
RB036GMSILDFHG
RB048GMSILDFHG
47-1/4 in
29-1/2 in
11-7/8 in
47-1/4 in
29-1/2 in
11-7/8 in
1,200 mm
749 mm 302 mm
749 mm 302 mm
Net Unit Weight
Indoor Unit
RB036GMSILDFHG
RB048GMSILDFHG
106.3 lbs
111.3 lbs
48.2 kgs
50.5 kgs
1,200 mm
Air Conditioner Installation & User Manual
Dimensions & Weight
Indoor Unit
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Air Conditioner Installation & User Manual
Product Overview
2
Front View
Top View
Outdoor Unit
W D H A B
Dimensions
Outdoor Unit
YN036GMSI20RUG
YN048GMSI20RUG
26-1/2 in
25 in
15-7/8 in
16 in
37-1/4 in
16-1/4 in
31-7/8 in
52-1/2 in
16-3/8 in
37-1/2 in
946 mm
952.5 mm
413 mm
416 mm
403 mm
406 mm
810 mm
1,333.5 mm
673 mm
635 mm
Net Unit Weight
Outdoor Unit
YN036GMSI20RUG
YN048GMSI20RUG
152.4 lbs
208.8 lbs
69.1 kgs
94.7 kgs
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Air Conditioner Installation & User Manual
Product Overview
2
Testing and rating agencies develop standard rating conditions to obtain full system-rated capacity and
efficiency. Within certain limitations, variable speed compressors compensate the deviations from the rating
conditions, especially the atmospheric conditions.
Heat pump systems function by exchanging energy between the indoor air and outdoor ambient air
(atmospheric) in the form of heat. The system's net cooling or heating capacities and efficiencies change by
atmospheric conditions, as well as the indoor air conditions, such as temperatures and humidity levels.
Professional individuals use detailed calculations to determine the capacity of the system required for a
specific area or application, which are based on several internal and external factors.
To further optimize the performance of the unit, complete the following:
• Keep doors and windows closed.
• Use Timer On and Timer Off functions to limit energy usage.
• Do not block air inlets or outlets.
• Regularly inspect and clean air filters.
Operating Temperatures
The system is designed to run within a certain range of temperatures, which are listed below. The system has
built-in protections that may stop the appliance when the ambient temperatures goes outside of these ranges.
°F / °C
Operating
Temperatures
Temperature
Setting Range
62~86°F
Ambient Temperature
Range for Cooling
Ambient Temperature
Range for Heating
17~30°C
5~131°F
-15~55°C
-13~86°F
-25~30°C
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Air Conditioner Installation & User Manual
Product Overview
2
Real-Time Constant Air Volume
With the auto airflow match feature, the A7 duct automatically adjusts the airflow to fit various ducting designs.
This ensures installation convenience, a comfortable experience, and cost savings.
Two Installation Methods
Two installation methods are available: ceiling-concealed and floor-concealed (optional).
The MSP duct machine requires no water tray replacement and features a water pump compatible with multiple
installation methods.
Features
Static Pressure Increase
The maximum medium static pressure (MSP) has been increased to 160Pa, which is industry-leading.
The maximum high static pressure (HSP) is 200pa, making it comparable to our competitors.
23
Duct Design Optimized
The redesigned ductwork significantly lowers ambient noise, improving occupant comfort during long periods
inside.
Fan Motor Upgrade
By combining three parts into one, the integrated motor bracket provides better stability and is easier to take
apart and put back together.
Electric Control Upgrade
To provide more maintenance space, the electronic control box area has been increased by 10% and the driver
board has been miniaturized by 40%. These upgrades make replacing the control box more convenient.
Drain Pump Upgrade
The service area for the A7 duct is 20% larger than that of the A6 duct. It is not necessary to pass through the
opening when replacing the drain pump and temperature sensor.
Air Conditioner Installation & User Manual
Product Overview
2
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Air Conditioner Installation & User Manual
Unpacking & Packing
3
Instructions for unpacking and packing the unit:
Unpacking:
Indoor Unit:
1. Cut the packing belt.
2. Unpack the package.
3. Take out the packing cushion and support.
4. Remove the packing film.
5. Take out the accessories.
6. Lift the machine out and lay it flat.
Outdoor Unit:
1. Cut the packing belt.
2. Take the unit out of the package.
3. Remove the foam from the unit.
4. Remove the packing film from the unit.
Packing:
Indoor Unit:
1. Put the indoor unit into the packing film.
2. Put the accessories in.
3. Place the packing cushion and support into the package.
4. Put the indoor unit into the package.
5. Close the package and seal it.
6. Use the packing belt if necessary.
Outdoor Unit:
1. Put the outdoor unit into the packing film.
2. Put the bottom foam into the box.
3. Put the outdoor unit into the package, then put the upper packaging foam on the unit.
4. Close the package and seal it.
5. Use the packing belt if necessary,
Note
Keep all the packaging items in case they're needed in the future.
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Air Conditioner Installation & User Manual
Installation Overview
4
Installation Summary
Install the outdoor unit
Install the indoor unitSelect the installation locations
1 2 3
Evacuate the refrigeration system
Connect the wires
Connect the refrigerant pipes
4 5 6
Perform a test run
L1 L2
MC MC
7
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Air Conditioner Installation & User Manual
Installation Overview
4
1
Magnetic ring
(Wrap the electric wires S1 &
S2 (P & Q & E) around the
magnetic ring twice)
Magnetic ring
(Hitch it on the connective
cable between indoor and
outdoor units after
installation.)
S1&S2 (P&Q&E)
Display panel 1
1
Manual
2~4
2
Refringent in/out pipe
protection cover
Copper nut
2
Outlet pipe clasp
1
1
Outlet pipe sheath
1
Wired remote controller
(with packing)
1
1
Remote controller & Battery
(purchase separately)
1
1
2
Remote controller holder
(purchase separately)
Drain joint
Seal ring
Name of Accessories
Qty
Shape
Name of Accessories
Qty
Shape
Connecting Pipe Sizes
Pipes are not included in the accessories and need to be purchased separately from the local dealer.
Liquid Side Gas Side
Ø3/8 in (Ø9.52 mm)
36K
Ø3/4 in (Ø19 mm)
48K
Connecting
pipe
assembly
Name Model
Pipe Specification
Ø3/8 in (Ø9.52 mm) Ø3/4 in (Ø19 mm)
Accessories
The system comes with the following general accessories. Use all of the installation parts and accessories to
properly install the air conditioner. The included items may vary slightly depending on the model. Pioneer
reserves the right to modify the included components for product improvement without notice.
Improper installation may result in water leakage, electrical shock and fire, or equipment failure. The items that
are not included with the air conditioner must be purchased separately.
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Air Conditioner Installation & User Manual
Installation Overview
4
Optional Accessories
There are two types of remote controls: Wired and wireless.
Select a remote controller based on customer preferences and requirements. Install the remote control in an
appropriate place. Refer to catalouges and technical literature for guidance on selecting a suitable remote
controller.
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Air Conditioner Installation & User Manual
Installation
5
5.1.
Select the Installation Locations
Notes
• Before starting, refer to the label on the product box to make sure that the model number of the indoor unit
matches the model number of the outdoor unit.
• We recommend understanding the guidelines for selecting ideal locations for the indoor and outdoor units.
• Refrain from exerting force on other parts of the unit, especially the refrigerant piping, water discharge
piping, and plastic parts.
Before installing the indoor and outdoor units, choose the appropriate locations.
Indoor Unit
Select an indoor unit installation location that meets these standards:
Sufficient space for installation
and maintenance.
Sufficient space to connect the
refrigerant pipes and condensate
drain hose.
The ceiling is horizontal and its structure can
sustain the weight of the indoor unit.
The air inlet and outlet
are not blocked.
The airflow can fill the
entire room.
No direct radiation from
heaters.
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Air Conditioner Installation & User Manual
Installation
5
The distances between the mounted indoor unit must meet the following specifications:
Ceiling-Mounted
Wall-Mounted
Areas with oil drilling or fracking
Coastal areas with high salt content in the air
Areas with caustic gases in the air, such as hot
springs
Areas that experience power fluctuations, such as
factories
Enclosed spaces, such as cabinets
Kitchens that use natural gas
Areas with strong electromagnetic waves
Areas that store flammable materials or gas
Rooms with high humidity, such as bathrooms or
laundry rooms
Do not install the unit in the following locations:
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Air Conditioner Installation & User Manual
Installation
5
Maintenance Space
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Air Conditioner Installation & User Manual
Installation
5
Firm and solid—the
location can support the
unit and will not vibrate.
Protected from prolonged periods of
direct sunlight or rain.
Where snowfall is anticipated, take
appropriate measures to prevent ice
buildup and coil damage.
Good air circulation
and ventilation.
Noise from the unit will
not disturb other
people.
Long-term
Meets all spatial requirements shown in the
installation clearance requirements above.
20 in (500mm) or more when front and
sides of the unit are clear
20 in (500 mm) or more
when any 2 sides of left,
right, and rear of the
unit are clear.
14 in (350 mm)
or more
4 in (100 mm)
or more
4 in (100 mm)
or more
Strong
wind
Strong
wind
Strong
wind
Wind Baffle
90-degree angle to the
direction of the wind
Build a wind baffle to
protect the unit
Build a shelter to protect
the unit
CAUTION:
Shelter
Special Considerations for Extreme Weather
If the unit is exposed to heavy wind:
Install the unit so that the air outlet fan is at a 90-degree angle to the wind direction. If necessary, build a barrier
in front of the unit to protect it from extremely strong winds.
If the unit is frequently exposed to heavy rain or snow:
Build a shelter above the unit to protect it from rain or snow, ensuring the airflow is not obstructed.
If the unit is frequently exposed to salty air (seaside):
Use an outdoor unit specifically designed for corrosion resistance.
Outdoor Unit
Select an outdoor unit installation location that meets these standards:
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Installation
5
Do not the install the outdoor unit in the following locations:
Near an obstacle that will block
air inlets and outlets.
Near public streets, crowded
areas, or places where noise
from the unit will disturb others.
Near animals or plants
that will be harmed by
hot air discharge.
Near any source of
combustible gas.
A location that is exposed to
large amounts of dust.
A location exposed to an
excessive amount of salty air.
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Air Conditioner Installation & User Manual
5.2.
Indoor Unit Installation
A. Hang the Indoor Unit
1. Install the indoor unit's main body. Refer to the following diagrams to locate the four positioning screw holes
on the ceiling and follow the guidelines for installing the ceiling bolt. Be sure to mark the locations for drilling the
ceiling bolt holes.
Installation
5
OUTLINE DIMENSIONS
A B C D
MODEL
36K/48K
11-3/4 in 2-ft, 5-1/2 in 2-ft, 7-1/4-in
1.2 m 300 mm 750 mm 795 mm
AIR OUTLET
OPENING SIZE
AIR RETURN
OPENING SIZE
MOUNTED LUG
SIZE
E F G
H
I
J
4-ft, 3/4-in 2-ft, 1-1/4-in3-ft, 4-3/8-in 9-1/4 in 3-ft, 7-in 10-1/2 in
1.24 m
640 mm1.03 m 233 mm 1.09 m 267 mm
3-ft, 11-1/4 in
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Air Conditioner Installation & User Manual
Hanging Methods
CAUTION
Ensure the unit and hole are the same size before moving on.
Installation
5
New Concrete Bricks
Inlay or embed the screw bolts.
Original Concrete Bricks
Use an embedding screw bolt, crock, and stick harness.
Steel Roof Beam Structure
Install and use the supporting steel angle.
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Air Conditioner Installation & User Manual
Installation
5
Wood
The upper foam's mounting holes are used for auxiliary positioning bolts. If the foam is damaged, the spacing
between the actual lifting lugs should be the standard.
Place the wood mounting across the roof beam, then install the hanging screw bolts.
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Air Conditioner Installation & User Manual
Installation
5
2. Install and fit the pipes and wires after finishing the main body installation. When choosing a starting point,
first determine the direction of the pipes.
3. Install the hanging screw bolts:
a. Cut off the roof beam.
b. Strengthen the point at which the cut was made. Consolidate the roof beam.
4. Prior to mounting the unit, ensure the refrigerant pipes, drainpipes, and indoor/outdoor lines are aligned with
their respective connection points, particularly for ceiling-mounted applications.
5. Drill four holes, 3-⅞ inches deep (100 mm), into the ceiling at the hook positions. Be sure to hold the drill at a
90-degree angle to the ceiling.
6. Secure the bolt using the provided washers and nuts.
7. Install the four suspension bolts.
8. Mount the indoor unit. At least two people are required to lift and secure it safely. Insert the suspension bolts
into the unit's hanging holes. Fasten them using the provided washers and nuts.
9. Mount the indoor unit onto the hanging screw bolts with a block. Position the indoor unit flat using a level
indicator to prevent leaks.
Note
Confirm the minimum drain tilt is 1/100 or more.
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Installation
5
3. Remove the four screws, then remove the water
pump components by 90-degrees. Attach the screws
to the water pump mounting plate again.
4. Install the pump parts to the machine and connect
the wiring set.
1. Remove the electrical control box cover, then
unplug the drain pump and water level switch
terminals from the main control board.
2. Disassemble the pump components.
Wall-Mounted Installations
This unit supports wall-mounted installations. If the unit requires vertical mounting, follow these steps:
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Air Conditioner Installation & User Manual
Installation
5
B. Install the Air Duct
1. Install the filter according to the air inlet's size.
2. Install the canvas tie-in between the body and duct.
3. The air inlet and outlet ducts must be sufficiently spaced to prevent an air passage short-circuit.
4. Connect the duct according to the following diagrams:
Notes
• The length of the air duct must be at least 3-feet, 3-⅜-inches (1 m) long. Attach the air inlet and outlet
using the screws.
• Install a grille with the air duct inlet and secure it using screws.
• Do not place the connecting duct's weight on the indoor unit.
• When connecting the duct, use a nonflammable canvas tie-in to prevent vibration.
• Wrap the insulation foam around the exterior of the duct to prevent condensation. If the end-user requires
noise reduction, add an internal duct underlayer.
• When the machine is wall-mounted, it should be concealed mounted and the air inlet and outlet should be
installed with a grille. Attach the grille firmly with the screws.
CAUTION
Ensure that no part of the human body touches any internal components of the equipment after installation.
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Air Conditioner Installation & User Manual
Installation
5
Fresh Air Duct Installation
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Air Conditioner Installation & User Manual
Installation
5
3. When installing the filter mesh, fit it into the flange as illustrated.
C. Install the Filter
Note
All the figures in this manual are for demonstration purposes only. The air conditioner you have purchased
may be slightly different in design, though similar in shape.
1. The duct is set to rear return air by default, and can be modified to bottom return air as needed. Remove the
ventilation panel, flange, and air filter.
2. Change the mounting positions of the ventilation panel and air return flange.
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Installation
5
D. Drill the Wall Hole for the Piping
When drilling the wall hole, make sure to avoid wires, plumbing, and other sensitive components.
CAUTION
1. Determine the wall hole's location based on the intended position of the outdoor unit.
2. Drill a hole through the wall using a 2-½ inches (63.5 mm) core drill. Make sure the hole is angled slightly
downward so that the exterior opening is a ½ inch (12 mm) lower than the interior opening. This slope ensures
proper water drainage.
3. Insert the protective wall cuff into the hole. This protects the edges of the hole and helps create a seal during
the final installation steps.
The hole being drilled in the wall is intended for the drainage and refrigerant piping.
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Air Conditioner Installation & User Manual
Installation
5
E. Install the Condensate Drain Hose
The condensate drain hose, also called a drain line, directs water away from the unit. Improper installation may
cause property damage.
Notes
• When using an extended drain line, tighten the indoor connection with an additional protection tube to
prevent accidental disconnection.
• The drain line should slope downward at a gradient of at least 1/100 to prevent water from flowing back
into the air conditioner.
• If the drain line outlet is higher than the pump joint, install a lift pipe for the indoor unit's exhaust outlet. Do
not install the lift pipe higher than 2-feet, 5-½-inches (750 mm) from the ceiling board. The distance
between the unit and lift pipe must be less than 11-¾ inches (300 mm). Improper installation may result in
water backflow, potentially flooding the unit.
• To prevent air bubbles, keep the drain line level or slightly tilted up by 3 inches (less than 75 mm).
• Installation requires a polyethylene tube (exterior diameter = 1 in / 25 mm), which can be obtained at a
local hardware store or dealer.
CAUTION
• Ensure the drain line installation complies with all local and national codes and regulations.
• Verify that the drain line is insulated to prevent condensation and potential water damage. If it is not,
insulate it properly.
• If the drain line is bent or installed incorrectly, water may leak and cause a water-level switch malfunction.
• Do not pull the drain line forcefully. This could disconnect it.
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Air Conditioner Installation & User Manual
Installation
5
1. Plan the Drain Line Layout
Before beginning the installation, plan the drain line layout and connection.
2. Cut the Drain Line (If Needed)
If necessary, cut the drain line to fit your layout and connection.
3. Insulate the Drain Line (If Needed)
Verify that the drain line is insulated to prevent condensation and potential water damage. If it is not, insulate it
properly. Insufficient insulation may allow dew to form due to low condensate temperatures, resulting in potential
water damage.
Insulate the drain line before beginning the connection, excluding the joint sections. These will be insulated at
the end of the procedure.
Ensure the insulation material is fitted tightly with no gaps. Do not over-tighten the insulation material. This may
compress the air out of the material, causing poor insulation and early aging.
The insulation material must be made of flame-retardant material. Select a material that complies with local
regulations.
The thickness of the insulation material must be more than ⅜ of an inch (10 mm).
Apply specialized adhesive to the insulation seams, then secure them with tape. Ensure the tape is at least 2
inches (51 mm) wide and applied firmly to prevent condensation.
4. Connect the Drain Hose
Attach the drain hose to the indoor unit's drain line connection.
Unlike wall-mounted systems, ceiling concealed units and other light commercial air conditioning systems
require a PVC drain line. The flexible drain hoses are not suitable for these applications.
Use a rubber coupler to connect the drain hose to the PVC drain line, ensuring a secure, water-tight seal. The
rubber coupler and PVC drain line are sold separately from the system.
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Air Conditioner Installation & User Manual
Installation
5
Install the drain line assembly as illustrated:
This is how the drain line assembly should look when
attached to the PVC line with the rubber coupler:
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Air Conditioner Installation & User Manual
Installation
5
These units operate with a negative pressure at the drain connections, meaning a drain trap is required. The
trap needs to be installed as close to the unit as possible. Make sure the top of the trap is below the connection
to the drain pan, allowing complete drainage of the pan.
Install the drain line with a pump as illustrated:
a: Metal clamp (accessory)
b: Drain hose (accessory)
c: Rising drain piping - vinyl pipe with a nominal diameter of 1 inch / 25 mm and outer diameter of 1-¼ inches /
32 mm (field supply)
d: Hanging bars (field supply)
When connecting multiple drain hoses, install them as illustrated:
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Air Conditioner Installation & User Manual
Installation
5
a: Water inlet
b: Portable pump
c: Water inlet cover
d: Bucket (adding water through the water inlet)
e: Drain outlet for maintenance
f: Refrigerant pipes
5. Pass the Drain Line Through the Wall Hole
When passing the drain line through the wall hole, make sure the water drains to a safe location where it will not
cause water damage or a slipping hazard.
The drain line outlet should be at least 1-⅞ inches (50 mm) above the ground. If it touches the ground, the unit
may become blocked, potentially leading to a malfunction.
If the water is discharged directly into the sewer, ensure the drain has a U or S pipe to prevent odors from
coming back into the house.
6. Complete a Drainage Test
This procedure differs depending on whether the electrical wiring is already finished. When the electrical wiring
is not finished, temporarily connect the user interface and power supply to the unit.
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Installation
5
When the Electrical Wiring is Not Finished Yet
1. Temporarily connect the electrical wiring.
2. Remove the switch box cover.
3. Connect the single-phase power supply (50hz,
230V) to terminals 1 and 2 for proper power supply
and earthing.
4. Reattach the switch box cover.
5. Turn on the power.
6. Start the cooling operation.
7. Gradually pour 1 liter of water through the air
discharge outlet, then check for leaks.
8. Turn off the power.
9. Disconnect the electrical wiring.
10. Remove the control box cover.
11. Disconnect the power supply and earthing.
12. Reattach the control box cover.
When the Electrical Wiring is Finished
1. Start the cooling operation.
2. Gradually pour 1 liter of water through the air
discharge outlet, then check for leaks.
7. Insulate the Joint Sections
The pipe joint insulation should be 2~4 inches (51~102 mm) longer than the gap to ensure a proper seal.
Insert the pipe joint insulation into the gap of the existing insulation.
Ensure the pipe joint insulation is securely fastened to the suction and liquid pipes to prevent gaps. Use glue to
paste together the linking part. Do not over-tighten the insulation material. This may compress the air out of the
material, causing poor insulation and early aging.
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Installation
5
5.3.
Outdoor Unit Installation
A. Install the Drain Joint (Optional)
The outdoor condensate drain hose is optional. It is only needed if the user does not want to use the default
bottom drainage port.
If a drain hose is required, install the drain joint in the base pan hole of the outdoor unit before mounting. When
mounting the outdoor unit on slabs, the installation of the drain joint and hose is not necessary.
There are two types of drain joints for the outdoor unit: one with a rubber seal and one without.
If the drain joint comes with a rubber seal (Figure A), follow these steps:
In Cold Climates
In cold climates, make sure the drain line is as vertical as possible to ensure swift water drainage. If water drains
too slowly, it can freeze in the hose and flood into the unit.
Base pan hole of
the outdoor unit
Seal
Seal
Drain joint
(A) (B)
1. Fit the rubber seal on the end of the drain joint connecting to the outdoor unit.
2. Insert the drain joint into the hole of the unit's base pan.
3. Rotate the drain joint 90-degrees until it clicks into place facing the front of the unit.
4. Connect a drain hose extension (not included) to the drain joint in order to redirect water from the unit during
Heating mode.
If the drain joint does not come with a rubber seal (Figure B), follow these steps:
1. Insert the drain joint into the base pan hole, then press firmly to ensure it is properly installed and does not
become loose.
2. Connect a drain hose extension (not included) to the drain joint in order to redirect water from the unit during
Heating mode.
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Installation
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B. Mount the Outdoor Unit
WARNING
When drilling into concrete, eye protection is recommended at all time.
• Before connecting any pipes or cables, install the outdoor unit on a pad or solid wall using suitable
mounting brackets.
• Decide the best position on the wall or ground and leave enough space in order to carry out maintenance
easily.
• Follow all national regulations when installing the unit.
Mounting on Slabs
• The installation of the drain joint and tubing is not necessary when mounting the unit on slabs.
Wall Mounting
• Before mounting the unit on the wall, make sure the wall is made of solid brick, concrete, or a similarly
strong material. The wall must be able to support at least four times the weight of the unit.
• Fasten the supporting brackets to the wall using hardware that is particularly suited for the type of wall.
Use the appropriate amount of hardware for the application. Installing four rubber pads is optional.
• If allowed, install the wall-mounted unit with rubber gaskets to reduce vibration and noise.
Before mounting the outdoor unit, read these notes:
General Notes
Notes
Choose the best location on the wall or ground, leaving enough space for easy maintenance. The outdoor unit
can be mounted to the ground or on wall brackets. The following list shows different outdoor unit sizes and the
distance between their mounting feet. Prepare the installation base for each unit according to the dimensions
found on Page 21 in the Product Overview section.
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1. Mark the positions for the four bolts based on the dimensions.
2. Pre-drill holes for the bolts.
3. Clean the concrete dust away from the holes.
4. Place a nut on the end of each bolt.
5. Hammer the bolts into each hole.
6. Remove the nuts from the bolts and place the outdoor unit onto the bolts.
7. Put washers onto each expansion bolt, then replace each of the nuts.
8. Use a wrench to tighten each nut until snug.
Ground/Concrete Mounting Platform
1. Mark the positions for the bracket holes based on the dimensions.
2. Pre-drill holes for the bolts.
3. Clean the concrete dust away from the holes.
4. Place a washer and nut on the end of each bolt.
5. Thread expansion bolts through the holes in the mounting bracket. Then, put the mounting bracket in position
and hammer the expansion bolts into the wall.
6. Confirm the mounting bracket is level.
7. If the feet of the outdoor unit have rubber pads already installed and are using a local dealer's wall-mounting
bracket, remove them before attempting to mount the condenser to the bracket. The mounting bracket has
rubber isolating pads on it that will take the place of these.
8. Carefully lift the unit and place its mounting feet on the brackets.
9. Bolt the unit firmly to the brackets.
Wall-Mounted Bracket
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L ≤ H
L ≤ 1/2H
L A
9-¾ in (250 mm) or more
1/2H < L ≤ H
11-¾ in (300 mm) or more
L > H
Cannot be installed
H: Unit height
L: Height of the wall behind the unit
A: Distance between the unit and wall
Multiple Outdoor Units
If multiple outdoor units are being installed in a row, follow these guidelines:
C. Install the Condensate Drain Hose (Optional)
The outdoor condensate drain hose is optional. It is only needed if the user does not want to use the default
bottom drainage port. Installing a drain hose is unnecessary if the unit is slab-mounted.
Instructions for planning the drain line layout, cutting the hose, and adding insulation are on Page 43 in the
Installation section. Revisit this page if necessary.
1. Connect the condensate drain hose to the drain joint at the bottom of the unit.
2. Ensure the water drains to a suitable location.
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Prerequisite:
• Do not install the connecting pipe until both the indoor and outdoor units have been installed.
Liquid Pipe Diameter
Gas Pipe Diameter
Max. Length of Pipe with Standard Charge
Max. Length Between Indoor and Outdoor Unit
Adjustment Refrigerant Charge
(For each additional foot after 25 ft.)
Max.
Drop Height
Between Indoor and Outdoor Unit
RYB-20
Type of Refrigerant
36
K BTU 48
K BTU
Φ
3/
4
in
25 ft / 7.6 m 25 ft / 7.6 m
250 ft / 76 m
100 ft / 30.5
m 100
ft / 30.5 m
250 ft / 76 m
R-
454B
0.
32
oz/ft
Φ 3/8 in
Refer to this table for refrigerant piping specifications, such as maximum length and drop height.
Refrigerant Piping Specifications
Φ 3/8 in
Φ
3/
4
in
Notes
• Confirm the refrigerant piping is insulated. All refrigerant piping from Pioneer arrives pre-insulated. If you
purchase refrigerant piping from another dealer that is not insulated, ensure that you insulate them
correctly.
• Confirm the refrigerant piping is flared. All refrigerant piping from Pioneer arrives pre-flared. If you
purchase refrigerant piping from another dealer that is not pre-flared, ensure that you flare them correctly.
• The length of the refrigerant piping will affect the performance and energy efficiency of the unit.
• Nominal efficiency is tested on units with a pipe length of 16 feet (4.9 m).
• The factory precharge supports up to 25 feet (7.6 m) of connected lineset.
• The total piping length should not be less than 10 feet (3 m).
• If the factory precharge is modified, make a note of the charge modification amount.
5.4.
Refrigerant Piping Connection
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CAUTION
If oil flows back into the outdoor unit's compressor, this might cause liquid compression or deterioration of the
oil return. Oil traps in the rising gas piping can prevent this.
Outdoor Unit is Beneath the Indoor Unit
Install an oil return bend every 19-feet, 8-¼-inches (6 m). There is no need to add a non-return bend at the
lowest and highest positions of the vertical pipe.
A. Plan the Piping Layout
Before beginning the installation, plan the refrigerant piping layout and connection.
Oil Traps
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Outdoor Unit is Above the Indoor Unit
Install an oil return bend every 19-feet, 8-¼-inches (6 m). Add the oil return bend and non-return bend at the
lowest and highest positions of the vertical pipe.
A B C
Ø 3/8 in
Ø 1/2 in
Ø 5/8 in
≥ 3/4 in (20 mm)
≤ 5-7/8 in (150 mm)
≥ 1 in (26 mm)
≥ 1-1/4 in (33 mm)
≤ 5-7/8 in (150 mm)
≤ 5-7/8 in (150 mm)
Oil Trap Dimensions
The dimensions for creating the oil return bend are as follows:
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B. Unwind the Piping
Gently unwind the refrigerant piping against a flat
surface instead of pulling the ends.
• Do not remove the seal caps from the pipe ends
until it is time to connect them, to prevent
contaminants from entering.
• Do not bend the pipe more than three times at
any single point. Be extremely careful not to kink
the piping.
• When bending refrigerant piping, the minimum
bending radius is 4 inches (102 mm).
C. Adjust the Piping Length (Optional)
If needed, precisely cut the refrigerant pipes to the appropriate length to meet the installation requirements.
This guarantees efficient operation and minimizes future maintenance.
Next, remove the burrs from the piping after cutting. This maintains an airtight seal on the refrigerant
connections.
Once the piping is cut and the burrs are removed, flare the pipe ends. Proper flaring is essential to achieve an
airtight seal. If pre-flared refrigerant piping arrives damaged, it can be re-flared.
Cut the Pipes
1. Measure the distance between the indoor and
outdoor units.
2. Use a pipe cutter to cut the pipe a little longer than
the measured distance.
3. Make sure the pipe is cut at a perfect 90-degree
angle.
Note
Be careful not to damage, dent, or deform the
pipe while cutting. This will drastically reduce the
heating efficiency.
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Remove Burrs
1. Hold the pipe at a downward angle to prevent
burrs from falling into the pipe.
2. Use a reamer or deburring tool to remove all the
burrs from the cut section of the pipe.
Flare Pipe Ends
1. Seal the pipe ends with PVC tape to prevent
foreign materials from entering.
2. Confirm the pipe was sheathed properly with
insulation material.
3. Place the flare nuts on both ends of the pipe.
Make sure they are facing the correct direction,
because it is not possible to change their direction
after flaring.
4. Remove the PVC tape from the ends of the pipe
when ready to perform the flaring work.
5. Clamp the flare form on the end of the pipe. The
end of the pipe must extend beyond the edge of
the flare form in accordance with the dimensions
shown in the tables:
Pipe Diameter
inch / mm
Flare Dimension A
inch / mm
Min Max
Ø1/4 / Ø6.4 0.33 / 8.4 0.34 / 8.7
Ø3/8 / Ø9.5
0.52 / 13.2
0.53 / 13.5
Ø1/2 / Ø12.7
0.64 / 16.2
0.65 / 16.5
Ø5/8 / Ø15.9
0.76 / 19.2
0.78 / 19.7
Ø3/4 / Ø19
0.91 / 23.2
0.93 / 23.7
Ø7/8 / Ø22.2
1.04 / 26.4
1.06 / 26.9
Piping Extension Beyond Flare Form
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Pipe Diameter
inch / mm
Torque
N.m (lb.ft)
Sketch Map
Ø1/4 / Ø6.35
18~20
(13.3~14.8)
Ø3/8 / Ø9.52
32~39
(23.6~28.8)
Ø1/2 / Ø12.7
49~59
(36.1~43.5)
Ø5/8 / Ø15.9
57~71
(42~52.4)
Ø3/4 / Ø19
67~101
(49.4~74.5)
Ø7/8 / Ø22
85-110
(62.7-81.1)
6. Place the flaring tool onto the form.
7. Turn the flaring tool's handle clockwise until the
pipe is fully flared.
8. Remove the flaring tool and flare form, then
inspect the end of the pipe for cracks and flaring.
D. Connect the Pipes
Connect the copper pipes to the indoor unit first, then connect it to the outdoor unit. Connect the low-pressure
pipe, then the high-pressure pipe. Use both a spanner and torque wrench when connecting or disconnecting
pipes to the unit.
Once the copper piping kit is unwound, refer to the instructions below:
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1. Bring the ends of both the copper line and the
indoor unit line together. Align the centers of the
pipes that will be connected.
2. Remove the indoor unit piping cap and check that
no debris is inside. Some gas may be heard
escaping, but it is dry nitrogen to keep the lines
clean.
3. Use any available leak guard or flare sealer on the
piping flares.
4. Attach the flare nut and tighten as much as
possible by hand. Torque correctly to the
specifications found in the table below using two
wrenches.
5. Repeat the process for the other copper line.
6. After connecting the copper pipes to the indoor
unit, wrap the communication cable, drain line, and
refrigerant piping together with binding tape. When
bundling these items, do not intertwine or cross the
communication cable with any other wiring. Keep the
drain line at the bottom so that the water can flow
freely. Ensure the bundle is exiting at a continuous
downward pitch.
7. Thread this pipeline through the wall and connect
it to the outdoor unit. The next page explains how to
connect the pipes to the outdoor unit.
8. Optional: Attach the water receiver (supplied in
the accessories box) to the indoor unit using a
screw.
Indoor Unit
Tightening Torque for
Protection Caps & Flange Connection
Service Port Nut
Protection Caps
[7 - 9] (5-7)
[25 - 30] (18-22)
Φ
Tightening Torque
[N x m] (ft-lbf)
Pipe
Diameter
Tightening Torque
[N x m]
Tightening Torque
[ft-lbf]
Corresponding Stress
(Using a 20 cm wrench)
Wrist Strength
Arm Strength
Arm Strength
Arm Strength
11 - 15
23 - 26
33 - 37
44 - 48
15 - 20
31 - 35
45 - 50
60 - 65
1/4"
(6.4 mm)
Φ
3/8"
(9.5 mm)
Φ1/2"
(12.7 mm)
Φ
5/8"
(15.9 mm)
Excessive force can break the flare nut or
damage the refrigerant piping. Do not exceed the
torque requirements shown in the table.
Do Not Use Excessive Torque
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1. Unscrew the cover from the packed valve side of
the outdoor unit.
2. Remove the protective caps from the valve ends.
3. Align the flared pipe end with each valve and
tighten the flare nut as tightly as possible by hand.
4. Use a spanner to grab the body of the valve. Do
not grab the nut that seals the service valve.
5. While firmly gripping the body of the valve, use a
torque wrench to tighten the flare nut according to
the correct torque values.
6. Loosen the flaring nut slightly, then tighten again.
7. Repeat the process for the remaining pipe.
8. Open the stop valves of the outdoor unit to start
the flow of the refrigerant.
Outdoor Unit
CAUTION
After completing the refrigerant piping connection,
check for refrigerant leaks. If a leak is detected,
ventilate the area immediately and evacuate the
system. Refer to Page 69 in the Installation
section for more information.
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Some systems require additional charging depending on the pipe lengths. In North America, the standard pipe
length is 25 feet (7.5 m). Charge the refrigerant from the service port on the outdoor unit's low-pressure valve.
Calculate the additional refrigerant to be charged using the following formula:
Refrigerant
R-454B
ؼ in (Ø6.35 mm) Ø⅜ in (Ø9.52 mm) ؽ in (Ø12.7 mm)
(Pipe length - standard
length) x 0.16oz/ft
(Pipe length - standard
length) x 15g/m
(Pipe length - standard
length) x 0.32oz/ft
(Pipe length - standard
length) x 30g/m
(Pipe length - standard
length) x 0.69oz/ft
(Pipe length - standard
length) x 65g/m
Liquid Side Diameter
E. Charge Additional Refrigerant (If Needed)
CAUTION
Do not mix different types of refrigerant.
61
The joint insulation should be 2~4 inches (51~102 mm) longer than the gap to ensure a proper seal.
Insert the joint insulation into the gap of the existing insulation.
Ensure the joint insulation is securely fastened to the suction and liquid pipes to prevent gaps. Use glue to paste
together the linking part. Do not over-tighten the insulation material. This may compress the air out of the
material, causing poor insulation and early aging.
Notes
• Only insulate the refrigerant piping joints after the refrigerant circuit has been properly vacuumed. Refer
to Page 69 in the Installation section for more information.
• While Pioneer piping comes pre-insulated, installers must still insulate the joints after evacuating the
refrigerant circuit.
F. Insulate the Refrigerant Piping Joints
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Before performing any electrical work, read these warnings:
General Warnings
• All wiring must comply with local and national electrical codes and regulations. A licensed electrician must
install all the wiring.
• All electrical connections must be made according to the electrical connection diagrams located on the
panels of the indoor and outdoor units.
• If there is a serious safety issue with the power supply, stop work immediately. Explain the reasoning to
the client and refuse to continue the installation until the safety issue is properly resolved.
Power Warnings
• The power voltage must be within 90-110% of the rated voltage. Insufficient power supply can cause a
malfunction, electrical shock, or fire.
• Only connect the unit to an individual branch circuit. Do not connect other equipment to the same power
circuit.
Wiring Warnings
• Firmly connect every wire. Loose wiring can cause the terminal to overheat, resulting in product
malfunction and possible fire.
• Keep the wiring away from the copper tube, as the refrigerant circuit can become extremely hot.
• Do not let wires touch or rest against the refrigerant tubing, compressor, or any moving parts.
• Do not cross the electrical wiring with the signal wiring. This may cause distortion, interference, or possibly
damage the circuit boards.
• Do not house wires of different voltages within the same wire tube. Avoid using metal wire tubes in
environments prone to acid or alkali corrosion; use plastic wire tubes instead.
• Do not place wire connect joints inside the tubing. If a wire connect joint is necessary, use a connection
box at the point of the joint.
WARNINGS
5.5. Communication Cable Connection
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Prerequisites:
Turn off the main power to the system. After powering off the system, wait 10 minutes or more before
touching the electrical components in order to avoid electrical shock.
Properly ground the system.
If the unit has an auxiliary electric heater, install it at least 3-feet, 3-⅜-inches (1 m) away from any
combustible materials.
Install an external surge suppressor at the outdoor disconnect (recommended).
When connecting power to fixed wiring, incorporate a properly rated, HACR-type circuit breaker or current
leakage protection switch. It must disconnect all poles with a contact separation of at least 1/8 inch (3
mm). Use only an approved switch or circuit breaker with a capacity of 1.5 times the unit's maximum
current.
Service Disconnect: When the air conditioner's maximum current is more than 16A, use a service
disconnect or leakage protection switch with a protective device (purchase separately). When the air
conditioner's maximum current is under 16A, equip the power of the air conditioner with a plug (purchase
separately).
Select the service disconnect as required by local, regional, and national codes. In North America, wire
the appliance according to NEC and CEC requirements.
The cograph is for explanation purposes only. The machine may be slightly different. The actual shape
shall prevail.
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Communication Cable Specifications
The 4-lead communication cable provides two power supply wires, one signal wire, and one ground wire. The
wires are individually insulated and bundled together inside the outer protective jacket. These wires are also pre-
fitted with U-lugs on their ends.
Communication Cable Specifications (All Models): AWG #16 x 4 Core TC-ER cable.
When connecting the communication cable consult the nameplate on the system for detailed electrical
specifications.
The 230V systems require a double-pole breaker. The tandem-type
will not work.
Connection Diagram
Double-Pole
230V Breaker
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Note
Connect the outdoor unit wires before the indoor unit wires.
A. Outdoor Unit Wiring
1. Remove the two screws fixed on the front and side panels, then detach the panel to access the wire
connections. (See the Outdoor Unit A figure).
Unscrew the electrical wiring cover and remove it (See the Outdoor Unit B figure).
3. Secure the cable with the clamp. Ensure it is tight and does not pull on the U-lugs.
4. Reattach the panel or cover.
2. Connect the U-lugs to the terminals, matching the numbers with those on the terminal block. There are three
terminals (1, 2, 3) and ground (G). Firmly screw each U-lug to its corresponding terminal. Strictly follow the
wiring diagram inside the electrical box cover when connecting the wires.
Select different wire colors according to the relevant regulations. Ensure the wire colors for the outdoor unit and
terminals match those used for the indoor unit.
Do not connect the power wire to the signal wire terminal. If power and signal wires run parallel, place them in
separate conduits and maintain a distance of at least 11-¾ inches (300 mm).
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B. Indoor Unit Wiring
1. Remove the electronic control box's cover on the indoor unit.
2. Connect the U-lugs to the terminals, matching the numbers with those on the terminal block. There are three
terminals (1, 2, 3) and ground (G). Firmly screw each U-lug to its corresponding terminal. Strictly follow the wiring
diagram inside the electrical box cover when connecting the wires.
Select different wire colors according to the relevant regulations. Ensure the wire colors for the outdoor unit and
terminals match those used for the indoor unit.
Do not connect the power wire to the signal wire terminal. If power and signal wires run parallel, place them in
separate conduits and maintain a distance of at least 11-¾ inches (300 mm).
Magnetic ring (if supplied with the accessories)
3. Secure the cable with the clamp. Ensure it is tight and does not pull on the U-lugs.
4. Pass the wire through the knock-down hole on the electric control box.
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5. Reattach the electric box cover. If the indoor unit is equipped with a display box, it needs to be installed in the
electric control box.
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C. Install the Electric Auxiliary Heat Module (Optional)
1. Install the supporter in the electric control box.
2. Install the converter control board to the supporter.
3. Connect the wire from the converter board to main
board CN40.
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5.6.
Evacuate the Refrigerant Circuit
Prerequisites:
Confirm the pipes connecting the indoor and
outdoor units are properly attached.
Ensure all electrical wiring is connected
properly.
Note:
When opening valve stems, turn the supplied
Allen wrench until the valve stem comes into
contact with the stopper. Do not try to force the
valve to open further.
1. Discharge the oxygen-free nitrogen. Evacuate the system to 8,000 microns (8 Torr) using all service valves.
2. Break the vacuum by introducing nitrogen into the port connections (liquid and gas lines) until achieving
positive pressure.
3. Evacuate the system to a reading of 5,000 Microns (5 Torr).
4. Break the vacuum again by introducing nitrogen into the port connections (liquid and gas lines) until achieving
positive pressure.
5. Evacuate the system to a reading of 500 Microns (0.5 Torr).
6. Hold the vacuum without movement for a minimum of 4 hours to ensure a moisture-free system.
7. If the vacuum fails to hold, repeat the steps until it does.
Reminder: Insulate the Refrigerant Piping Joints
Once the refrigerant circuit is evacuated, remember to insulate the refrigerant piping joints.
For instructions, refer to Page 61 in the Installation section.
CAUTION
Qualified and well-trained personnel must complete the evacuation of the refrigerant circuit.
Air and foreign matter in the refrigerant circuit can lead to abnormal rises in pressure, which can damage the air
conditioner, reduce its efficiency, and cause injury.
Use a vacuum pump and manifold gauge to evacuate the refrigerant circuit, removing any non-condensable gas
and moisture from the system.
Perform the evacuation after the initial installation and when relocating the unit.
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Leak Checks & Test Run
After installation, confirm that the unit's electrical system is safe and operating properly. Electrical leak checks
are required before and during the test run.
Warning –
Risk of Electric Check
All electrical wiring must comply with the
installation manual and local and national
regulations. All work must be performed by a
licensed electrician.
Before Test Run
Check grounding work.
Measure the grounding resistance with a
grounding resistance tester. Grounding
resistance must be less than 4Ω.
This may not be required in some locations.
During Test Run
Check for electrical leakage.
During the test run, use an electroprobe and
multimeter to perform a comprehensive
electrical leakage test.
If electrical leakage is detected, turn off the
unit immediately and call a licensed electrician
to find and resolve the cause of the leakage.
This may not be required in some locations.
6.1.
Electrical Leak Checks
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Confirm the system is not leaking gas. Gas leak checks are required before and during the test run.
Before Test Run
Check all flare nut connections to ensure the
system is leak-free.
Confirm that both the gas and liquid valves
(high/low) are 100% fully opened.
During Test Run
During operation, the pressure of the
refrigerant circuit will increase. This may
reveal leaks that were not present during the
initial leak check. Take time to double-check
that all copper pipe connection points are leak
free.
Gas Leak Checks
There are two methods to check for gas leakage:
Soap & Water Method
Use a soft brush to apply soapy water or liquid
detergent to all pipe connection points on the
indoor and outdoor units. The presence of
bubbles indicates a leak.
Leak Detector Method
If using a leak detector, refer to the device's
operation manual for proper usage instructions.
After Test Run
After confirming that all the pipe connection
points do not leak, replace the valve cover on
the outdoor unit.
6.2.
Gas Leak Checks
6
Leak Checks & Test Run
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6.3.
Test Run
Perform the test run only after the system is fully installed and the electrical and gas leak checks are complete.
Before Test Run
Electrical Safety Checks
Confirm the unit's electrical system is safe
and operating properly.
Gas Leak Checks
Check all flare nut connections and confirm
the system is not leaking.
Valve Checks
Confirm that both the gas and liquid valves
(high/low) are 100% fully opened.
Test Run Instructions
Perform the following test run for 30 minutes:
1. Connect power to the unit.
2. Press the On/Off button on the remote controller
to turn it on.
3. Press the Mode button to scroll through the
following functions, one at a time.
• Cooling - Select the lowest temperature.
• Heating - Select the highest temperature.
4. Let each function run for 5 minutes and perform
the following checks:
After Test Run Completion
After the 10 boxes above have been checked and marked as passed, perform the following operation:
1. Use the remote control to return the system to a normal desired operating temperature.
2. Use insulation tape to wrap the indoor unit's refrigerant pipe connections that were left uncovered during
the installation process.
If Ambient Temperatures Are Too High to Run a Heating Test:
If outside temperatures are too high to permit Heating mode on the remote controller, do the following:
1. Turn the unit on and put it in Heating mode using the emergency button.
2. Run the Heating mode test as normal and turn the unit back off using the button when complete.
o Water drains from the drain line properly
o All piping is properly insulated
o Indoor unit responds to the remote controller
o Indoor unit louvers work properly
o System works in both Heating & Cooling mode
o No electrical leaks or abnormal noises
o Unit is properly grounded
o All electrical terminals are properly covered
o Indoor and outdoor units are securely installed
o All pipe connections points do not leak
Pass/Fail?
6
Leak Checks & Test Run
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Notes
• Before commissioning, check the machine's power connection, turn on the power, and ensure the
machine is not operating.
• If there is no change after the airflow adjustment, perform the setting again.
The indoor ducted units can be programmed for different static pressures or real-time constant airflows. Use the
following steps to set the static pressure or real-time constant airflow.
120L Wire Controller
Set Static Pressure Airflow
The factory default setting is SP1. The external static pressure can be manually changed to the fan curves 1, 2,
3, 4, 5, 6, 7, or 8.
1. Press and hold the On/Off and Fan buttons for 7 seconds.
2. Press the "Up" and "Down" buttons to scroll through the menu and select "8".
for 2 seconds. Press the "Up" and "Down" buttons to scroll through and select
3. Press and hold the On/Off
"1-8".
4. Press the Check or "OK" button and the display board shows "CS".
5. Press and hold the On/Off and Fan buttons for 2 seconds. Then, exit the test mode.
Set Real-Time Constant Airflow
Use the Automatic Airflow (AF) adjustment function to achieve real-time constant airflow.
1. Press and hold the On/Off and Fan buttons for 7 seconds.
2. Press the "Up" and "Down" buttons to scroll through the menu and select "8".
for 2 seconds. Press the "Up" and "Down" buttons to scroll through and select 3. Press and hold the On/Off
"AF".
4. Press the Check or "OK" button and the display board shows "CS".
5. Press and hold the On/Off and Fan buttons for 2 seconds. Then, exit the test mode.
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Notes
• T1, T2, T2b, T3, T4 are sub-menus for thermistors. Do not select to set the external static pressure.
• Before commissioning, check the machine's power connection, turn on the power, and ensure the
machine is not operating.
• If there is no change after the airflow adjustment, perform the setting again.
120N Wired Controller
Set Static Pressure Airflow
The factory default setting is SP1. The external static pressure can be manually changed to the fan curves 1, 2,
3, 4, 5, 6, 7, or 8.
1. Press and hold the Copy button for 3 seconds. The lower right corner shows P:00. Press "OK".
2. Press the "Up" button to scroll through the menu. The lower right corner shows SP. Press "OK".
3. Press the "Up" and "Down" buttons to scroll through the menu and select "1-8". Press "OK".
4. Press the Back button to exit test mode.
Set Real-Time Constant Airflow
Use the Automatic Airflow (AF adjustment function to achieve real-time constant airflow.
1. Press and hold the Copy button for 3 seconds. The lower right corner shows P:00. Press "OK".
2. Press the "Up" button to scroll through the menu. The lower right corner shows AF. Press "OK".
3. Press the Back button to exit test mode.
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Air Conditioner Installation & User Manual
Notes
• Each time the air conditioner is powered on, a buzzing sound will be heard to indicate that the product has
been powered on normally. If there is no sound, it is possible that the unit is operating abnormally. Power
on the unit again or check the circuit.
• The actual functions are subject to the product that was purchased. Check the indoor display and remote
control of the air conditioner. See the Remote Controller manual for information on more features.
Display Panel
Manual Button: This button selects the mode in the following order: Auto, Forced Cool, and Off.
Forced Cooling Mode: In Forced Cooling mode, the operation light flashes. The system will then turn to
Auto mode after it has cooled with a high wind speed for 30 minutes. The remote control will be disabled during
this operation.
Off Mode: When the display panel is turned off, the unit turns off and the remote control is re-enabled.
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Operating Instructions
7
Refrigerant Leakage Detection
When the system detects a refrigerant malfunction,
the indoor unit will automatically display the following
error codes:
o EL0C: System lacks refrigerant.
o EHC1: Refrigerant sensor detects leakage.
o EHC2: Refrigerant sensor's operating condition
is out of range and leakage is detected.
o EHC3: Refrigerant sensor's operating condition
is out of range.
o ECC1: The other indoor unit refrigerant sensor
detects leakage (multi-zone systems).
Air Conditioner Installation & User Manual
1. T1 - Td ≤ 28°F (-2°C) (T1 - room temperature; Td
-target temperature).
2. T2 ≤ 113°F (45°C) (T2 - indoor coil temperature).
3. The fan continues to operate.
When one of the following conditions is met, the Aux
Heater function turns off:
1. T1 ≥ Td (T1 - room temperature; Td - target
temperature).
2. T2 ≥ 129°F (54°C) (T2 - indoor coil temperature).
3. The indoor fan is off.
4. During a defrosting period.
5. The system is shut down.
6. There is an operation malfunction.
7. When the Aux Heater function is enabled with the
remote off, the indoor fan is forced to operate at low
speed for 30 seconds.
8. Once the Aux Heater is turned on, the anti-cold air
function stops operating.
EHC1, EHC2, EHC3, and ECC1 error codes are
only applicable for units with refrigerant sensors.
When EHC1 or EHC2 errors occur, the buzzer will
continue to beep for 5-6 minutes before stopping.
Pressing any button on the remote control will also
stop the buzzer.
Auto-Restart
If a power failure occurs, the system will immediately
stop. When power returns, the operation light on the
indoor unit will flash. Press the On/Off button on the
remote control to restart the unit. If the system has
an auto-restart function, the unit will restart using the
same settings.
Forced Cooling Mode
In this mode, the operation light flashes. The system
will turn to Auto mode after it has cooled with a high
wind speed for 30 minutes. The remote control will
be disabled during this operation.
Features
Heat Exchanger Dust Removal Function
This feature helps keep the outdoor coil cleaner and
may extend the duration between regular
maintenance intervals depending on the local
conditions. When the unit is turned off, a delay
occurs when the outdoor fan runs in reverse rotation
for 70 seconds to blow off loose accumulated dust
and debris.
Electric Auxiliary Heat Module (Optional)
The electric auxiliary heat module activates when the
"Aux Heater" button is pressed. It then operates
automatically based on control logic until the button
is pressed again to deactivate it.
The Aux Heater function activates when the three
conditions are all met simultaneously. Heating mode
must be active while the defrost period is off.
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Operating Instructions
7
Air Conditioner Installation & User Manual
Sleep Operation
This function decreases energy use during sleeping
hours. The function doesn't need the same
temperature settings to stay comfortable. Use the
remote control to activate this function. The Sleep
function is not available in Fan or Dry mode.
Press the Sleep button to activate this function.
When in Cooling mode, the unit will increase the
temperature by 2°F (1°C) after 1 hour, then
increase by an additional 2°F (1°C) after another
hour. When in Heating mode, the unit will decrease
the temperature by 2°F (1°C) after 1 hour, then
decrease by an additional 2°F (1°C) after another
hour. The feature will stop after 8 hours and the
system will keep running with the final situation.
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Operating Instructions
7
9
Maintenance
Air Conditioner Installation & User Manual
CAUTION
• Always turn off the system and disconnect its power supply before cleaning or performing maintenance.
• An authorized dealer or licensed service provider must perform the removal and maintenance of the filter.
• When removing the filter, do not touch metal parts in the unit. The sharp metal edges can cut you.
• Do not expose the filter to direct sunlight when drying. This can shrink the filter.
• An authorized dealer or licensed service provider must perform any maintenance on the indoor and
outdoor unit.
• Do not wash the unit under running water, as this will create an electrical hazard.
• Only use a soft, dry cloth to wipe the unit clean. If the unit is especially dirty, use a cloth soaked in warm
water to wipe it clean.
• Do not use chemicals or chemically treated cloths to clean the unit.
• Do not use paint thinner, polishing powder, or other solvents to clean the unit. They can cause the plastic
surface to crack or deform.
• Do not use water to clean the inside of the indoor unit. This can destroy insulation and cause electrical
shock.
• Do not use water hotter than 104°F (40°C) to clean the front panel. This can cause the panel to deform or
become discolored.
• The cooling efficiency of the unit and your health could be damaged by the clogged AC. Make sure to
clean the filter every two weeks.
• In households with animals, periodically wipe down the grille to prevent animal hair from blocking the
airflow.
• Do not substitute a blown fuse with a higher or lower amperage rating fuse, as this may cause circuit
damage or an electrical fire.
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Motor & Drain Pump Maintenance
Motor Maintenance
Pump Maintenance
1. Remove the ventilated panel.
2. Remove the blower housing.
3. Remove the motor.
1. Remove the four screws from the drain pump.
2. Unplug the pump power supply and water level
switch cable.
3. Detach the pump.
Air Conditioner Installation & User Manual
Maintenance –
Long Periods of Non-Use
Maintenance –
Pre-Season Inspection
After long periods of non-use, or before
periods of frequent use, do the following:
If the air conditioner won't be used for an
extended period of time.
Turn off the unit and
disconnect the power
Turn on the Fan function until the
unit dries out completely
Make sure nothing is blocking the air inlets
and outlets
Check for damaged wires
Check for leaks
9
Maintenance
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Air Conditioner Installation & User Manual
The following issues are not malfunctions and will not require repairs in most situations:
Common Issues
T
Troubleshooting
CAUTION
o
If any of the following conditions occur, turn off the unit immediately:
o
o
o
o
The power cord is damaged or abnormally warm.
A burning odor is present.
The unit is emitting loud or abnormal sounds.
A power fuse blows or the circuit breaker frequently trips.
Water or other objects fall into or out of the unit.
Do not attempt to fix these problems by yourself. Contact an authorized service provider immediately.
Unit does not turn on when
pressing the On/Off button
Unit changes from
Cooling/Heating mode
to Fan mode
Indoor unit emits white
mist
Indoor and outdoor units
emit white mist
Indoor unit makes noises
Indoor and outdoor units
make noises
The unit has a 3-minute protection feature that prevents the unit from overloading. The
unit cannot be restarted within 3 minutes of being turned off.
Cooling and Heating mode: If the operation light and PRE-DEF (pre-heating/defrost)
indicators are lit up, the outdoor temperature is too cold, activating the unit's anti-cold
wind feature in order to defrost the unit.
In Cooling-only mode: If the Fan-Only indicator is lit up, the outdoor temperature is
too cold, activating the unit's anti-freeze protection in order to defrost the unit.
The unit may change its settings to prevent frost from forming on the unit. Once
the temperature increases, the unit will start operating in the previously selected
mode again.
The set temperature has been reached, at which point the unit turns off the
compressor. The unit will continue operating when the temperature fluctuates again.
In humid regions, a large temperature difference between the room's air and the
conditioned air can cause white mist.
When the unit restarts in Heating mode after defrosting, white mist may be emitted
due to moisture generated from the defrosting process.
A rushing air sound may occur when the louver resets its position.
A squeaking sound is heard when the system is off or in Cooling mode. The noise is
also heard when the drain pump (optional) is in operation.
A squeaking sound may occur after running the unit in Heating mode,
due to expansion and contraction of the unit's plastic parts.
Low hissing sound during operation: This is normal and caused by refrigerant
gas flowing through both the indoor and outdoor units.
Low hissing sound when the system starts, stops running, or defrosting: This noise is
normal and caused by the refrigerant gas stopping or changing direction.
Squeaking sound: Normal expansion and contraction of plastic and metal parts
caused by temperature changes during operation can cause squeaking noises.
Issue
Possible Causes
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Air Conditioner Installation & User Manual
T
Troubleshooting
Problem
Possible Causes
Solution
Poor Cooling
Performance
Temperature setting may be higher
than ambient room temperature.
Heat exchanger on the indoor or
outdoor unit is dirty.
Air filter is dirty.
Air inlet or outlet of either unit is
blocked.
Doors and windows are open.
Excessive heat is generated by sunlight.
Too many sources of heat in the room
(people, computers, electronics, etc.).
Low refrigerant due to leak or long-
term use.
Lower the temperature setting.
Clean the affected heat exchanger.
Remove the filter and clean it according
to the instructions in this manual.
Turn the unit off, remove the obstruction, and
turn it back on.
Make sure that all doors and windows are
closed while operating the unit.
Close windows and curtains during periods
of high heat or bright sunshine.
Reduce the amount of heat sources.
Check for leaks. Reseal if necessary and top
off the refrigerant.
When trouble occurs, check the following points before contacting a repair company:
Outdoor unit
makes noises
Dust is emitting from
either the indoor or
outdoor unit
Unit emitting bad odor
Outdoor unit's fan
does not operate
The outdoor unit will make different sounds based on its current operating mode.
The unit may accumulate dust during extended periods of non-use, which will be emitted
when the unit is turned on. This can be mitigated by covering the unit during long periods
of inactivity.
The unit may absorb odors from the environment, which will be emitted during
operations. Examples are furniture, cooking, cigarettes, etc.
The unit's filters have become moldy and need to be cleaned.
During operation, the fan speed is controlled to optimize product operation.
Issue
Possible Causes
If the problem persists, contact a local dealer or the nearest customer service center. Provide them with a
detailed description of the unit malfunction and model number.
Note
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Air Conditioner Installation & User Manual
T
Troubleshooting
Poor heating
performance
Unit starts and stops
frequently
Unit is not operating
Outdoor temperature is
extremely low.
Cold air is entering through
doors and windows.
Low refrigerant due to leak
or long-term use.
Use an auxiliary heating device.
Make sure that all doors and windows are
closed during use.
Check for leaks. Reseal if necessary and top off
refrigerant.
There's too much or little
refrigerant in the system.
Incompressible gas or moisture
has entered the system.
System circuit is blocked.
Compressor is broken.
Voltage is too high or low.
Check for leaks and recharge the system
with refrigerant.
Evacuate and recharge the system with refrigerant.
Determine which circuit is blocked and replace
the malfunctioning piece of equipment.
Replace the compressor.
Install a manostat to regulate the voltage.
Power failure.
Power is turned off.
Fuse is burned out.
Remote control batteries
are dead.
The unit's 3-minute protection
has been activated.
The unit's timer is activated.
Wait for the power to be restored.
Turn on the power.
Replace the fuse.
Replace the batteries.
Wait 3 minutes after restarting the unit.
Turn the timer off.
Problem
Possible Causes
Solution
Indicator lamps
continue to flash
Error codes appear and
begin with the letters as
the following in the
window display of the
indoor unit:
• E (x), P (x), F (x)
• EH (xx), EL (xx),
EC (xx)
• PH (xx), PL (xx),
PC (xx)
The unit may stop operating or continue to run safely. If the indicator lamps
continue to flash or error codes appear, wait about 10 minutes. The problem may
resolve itself.
If not, disconnect the power. Then, connect the power again and turn the unit on.
If the problem continues after performing the checks and diagnostics above, turn off
the unit immediately and contact an authorized service center.
The design and specifications are subject to change without prior notice for product
improvements. Consult with the sales agency or manufacturer for details. Any
updates to the manual will be uploaded to the service website, check for the latest
version.
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The design and specifications of this product are subject to change without prior notice
as development continues. Consult with the sales agency or manufacturer for details.
Refer to the equipment nameplate for all other applicable specifications.
Copyright © Parker Davis HVAC International, LLC. All rights reserved.
is a registered trademark of Parker Davis HVAC International, LLC.
Parker Davis HVAC International
7290 NW 77 Court, Miami, FL 33166 - USA
Tel
: (305) 513-4488
Fax
: (305) 513-4499
E-mail
Website: www.pdhvac.com
Pioneer product line, parts, and supplies are
available online for convenient ordering at:
www.highseer.com
www.pioneerminisplit.com
Scan the below code to visit our support page
where you can find more installation materials:
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