GE - General Electric NS16H18SA5 1.5-Ton 16 SEER2 User Manual

READ CAREFULLY.

KEEP THESE INSTRUCTIONS

31-5000951 Rev. 0 03-25

GE is a trademark of the General Electric Company. Manufactured under trademark license.

NS16H

Heat Pump R-454B

Service

Manual

2 31-5000951 Rev. 0

General Information

These instructions are intended as a general guide and do not supersede national or local codes in any way. Consult

authorities having jurisdiction before installation.

The NS16H model is designed for use with R-454B refrigerant only. This unit must be installed with an approved indoor

air handler or coil. For AHRI Certified system matchups and expanded ratings, visit AHRIDirectory.org.

This outdoor unit is designed for use in systems that use the following refrigerant metering device:

• Check thermal expansion valve (CTXV)

IMPORTANT

Special procedures are required for cleaning the all-aluminum coil in this unit. See page 36 in this instruction for

information.

NOTE – This NS16H unit is a PARTIAL UNIT AIR CONDITIONER, complying with PARTIAL UNIT requirements of this

Standard, and must only be connected to other units that have been confirmed as complying to corresponding PARTIAL

UNIT requirements of this Standard,

UL 60335-2-40/CSA C22.2 No. 60335-2-40, or UL 1995/CSA C22.2 No 236.

31-5000951 Rev. 0 3

Important Safety Information

READ AND SAVE THESE INSTRUCTIONS

WARNING

For your safety; the information in this manual must be followed to minimize the risk of fire,

electric shock, or personal injury.

• Refrigerant can be harmful if it is inhaled. Refrigerant

must be used and recovered responsibly.

• Failure to follow this warning may result in personal

injury or death.

• Improper installation, adjustment, alteration, service

or maintenance can cause property damage, personal

injury or loss of life. Installation and service must be

performed by a licensed professional HVAC installer or

equivalent, service agency, or the gas supplier.

• To prevent serious injury or death:

1. Lock-out/tag-out before performing maintenance.

2. If system power is required (e.g., smoke detector

maintenance), disable power to blower, remove fan

belt where applicable, and ensure all controllers

and thermostats are set to the “OFF” position before

performing maintenance.

3. Always keep hands, hair, clothing, jewelry, tools, etc.

away from moving parts.

• Do not use means to accelerate the defrosting process

or to clean, other than those recommended by the

manufacturer.

• The appliance shall be stored 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.

• Ducts connected to an appliance shall not contain a

potential ignition source.

• Every working procedure that affects safety means shall

only be carried out by competent persons. This appliance

is not to be used by persons (including children) with

reduced physical, sensory or mental capabilities, or

lack of experience and knowledge, unless they have

been given supervision or instruction concerning use of

the appliance by a person responsible for their safety.

Children should be supervised to ensure they do not play

with the appliance.

• Auxiliary devices which may be a potential ignition

source shall not be installed in the duct work. Examples

of such potential ignition sources are hot surfaces with

a temperature exceeding 700°C and electric switching

devices.

• For appliances using A2L refrigerants connected via

an air duct system to one or more rooms, only auxiliary

devices approved by the appliance manufacturer or

declared suitable with the refrigerant shall be installed in

connecting ductwork.

• For duct connected appliances, false ceilings or

drop ceilings may be used as a return air plenum if a

REFRIGERANT DETECTION SYSTEM is provided in

the appliance and any external connections are also

provided with a sensor immediately below the return air

plenum duct joint.

• PARTIAL UNITS shall only be connected to an appliance

suitable for the same refrigerant.

• If this appliance is conditioning a space with an area

smaller than TAmin, then that space must be without

continuously operating open flames (e.g. an operating

gas appliance) or other potential ignition sources (e.g. an

operating electric heater or similar hot surface). A flame-

producing device may be installed in the same space

if the device is provided with an effective flame arrest

system.

• Electric Shock Hazard. Can cause injury

or death. Unit must be properly grounded in

accordance with national and local codes.

Line voltage is present at all components

when unit is not in operation on units

with singlepole contactors. Disconnect

all remote electric power supplies before

opening access panel. Unit may have

multiple power supplies.

4 31-5000951 Rev. 0

Important Safety Information

READ AND SAVE THESE INSTRUCTIONS

CAUTION

• As with any mechanical equipment, contact with sharp

sheet metal edges can result in personal injury. Take

care while handling this equipment and wear gloves and

protective clothing.

• Servicing shall be performed only as recommended by

the manufacturer.

• Under no circumstances shall potential sources of

ignition be used in the searching for or detection of

refrigerant leaks. A halide torch (or any other detector

using a naked flame) shall not be used.

• The following leak detection methods are deemed

acceptable for all refrigerant systems:

• Electronic leak detectors may be used to detect

refrigerant leaks but, in the case of flammable

refrigerants, the sensitivity may not be adequate, or

may need recalibration. (Detection equipment shall

be calibrated in a refrigerant-free area.) Ensure that

the detector is not a potential source of ignition and

is suitable for the refrigerant used. Leak detection

equipment shall be set at a percentage of the LFL of

the refrigerant and shall be calibrated to the refrigerant

employed, and the appropriate percentage of gas (25

% maximum) is confirmed. Leak detection fluids are

also suitable for use with most refrigerants but the use

of detergents containing chlorine shall be avoided as

the chlorine may react with the refrigerant and corrode

the copper pipe-work. If a leak is suspected, all naked

flames shall be removed/extinguished. If a leakage

of refrigerant is found which requires brazing, all of

the refrigerant shall be recovered from the system, or

isolated (by means of shut off valves) in a part of the

system remote from the leak.

• Repair and maintenance to electrical components shall

include initial safety checks and component inspection

procedures such as that capacitors are discharged

in a safe manner to avoid possibility of sparking, that

no live electrical components and wiring are exposed

while charging, recovering, or purging the system, and

that there is continuity of grounding. If a fault exists

that could compromise safety, then no electrical supply

shall be connected to the circuit until it is satisfactorily

dealt with. If the fault cannot be corrected immediately

but it is necessary to continue operation, an adequate

temporary solution shall be used that is reported to the

owner of the equipment, so all parties are advised.

• No person carrying out work in relation to a refrigerating

system which involves exposing any pipe work shall

use any sources of ignition in such a manner that it may

lead to the risk of fire or explosion. All possible ignition

sources, including cigarette smoking, should be kept

sufficiently far away from the site of installation, repairing,

removing and disposal, during which refrigerant can

possibly be released to the surrounding space. Prior to

work taking place, the area around the equipment is to

be surveyed to make sure that there are no flammable

hazards or ignition risks. “No Smoking” signs shall be

displayed.

• Sealed electrical components shall be replaced, not

repaired.

• Intrinsically safe components must be replaced, not

repaired.

• Some soaps used for leak detection are corrosive to

certain metals. Carefully rinse piping thoroughly after

leak test has been completed. Do not use matches,

candles, flame or other sources of ignition to check for

gas leaks.

31-5000951 Rev. 0 5

Important Safety Information

READ AND SAVE THESE INSTRUCTIONS

IMPORTANT

• This unit must be matched with an indoor coil as specified

with AHRI. For AHRI Certified system match-ups, visit

AHRIDirectory.org.

• Ensure that the area is in the open or that it is adequately

ventilated before breaking into the system or conducting

any hot work. A degree of ventilation shall continue

during the period that the work is carried out.

• Verify cabling will not be subject to wear, corrosion,

excessive pressure, vibration, sharp edges or any other

adverse environmental effects.

• Pipe work, including piping material, pipe routing,

and installation shall include protection from physical

damage in operation and service, and be in compliance

with national and local codes and standards, such as

ASHRAE 15, ASHRAE 15.2, IAPMO Uniform Mechanical

Code, ICC International Mechanical Code, or CSA B52.

All field joints shall be accessible for inspection prior to

being covered or enclosed.

• Work shall be undertaken under a controlled procedure

so as to minimize the risk of a flammable gas or vapor

being present while the work is being performed.

NOTE: All maintenance staff and others working in the

local area shall be instructed on the nature of work being

carried out with work in confined spaces being avoided.

• The area shall be checked with an appropriate refrigerant

detector prior to and during work, to ensure the technician

is aware of potentially toxic or flammable atmospheres.

Ensure that the leak detection equipment being used

is suitable for use with all applicable refrigerants, i. e.

nonsparking, adequately sealed or intrinsically safe.

• If any hot work is to be conducted on the refrigerating

equipment or any associated parts, the appropriate fire

extinguishing equipment shall be available to hand.

Have a dry powder or CO2 fire extinguisher adjacent to

the charging area.

• Where electrical components are being changed,

they shall be fit for the purpose and to the correct

specification.

• At all times the manufacturer’s maintenance and service

guidelines shall be followed. If in doubt, consult the

manufacturer’s technical department for assistance.

• The following checks shall be applied to installations

using FLAMMABLE REFRIGERANTS as applicable:

1. The actual refrigerant charge is in accordance with the

room size within which the refrigerant containing parts

are installed.

2. The ventilation machinery and outlets are operating

adequately and are not obstructed.

3. If an indirect refrigerating circuit is being used, the

secondary circuit shall be checked for the presence

of refrigerant.

4. Markings on the equipment should be visible and

legible. Markings and signs that are illegible shall be

corrected.

5. Refrigerating pipe or components are installed in a

position where they are unlikely to be exposed to any

substance which may corrode refrigerant containing

components, unless the components are constructed

of materials which are inherently resistant to being

corroded or are suitably protected against being so

corroded.

• When breaking into the refrigerant circuit to make

repairs – or for any other purpose – conventional

procedures shall be used. However, for flammable

refrigerants it is important that best practice be followed

and, since flammability is a consideration, procedures

such as safely remove refrigerant following local and

national regulations, purging the circuit with inert gas,

evacuating (optional for A2L), purging with inert gas

(optional for A2L), or opening the circuit by cutting or

brazing be adhered to. The refrigerant charge shall

be recovered into the correct recovery cylinders if

venting is not allowed by local and national codes.

For appliances containing flammable refrigerants, the

system shall be purged with oxygen-free nitrogen to

render the appliance safe for flammable refrigerants.

This process might need to be repeated several

times. Compressed air or oxygen shall not be used for

purging refrigerant systems. For appliances containing

flammable refrigerants, refrigerants purging shall be

achieved by breaking the vacuum in the system

with oxygenfree nitrogen and continuing to fill until

the working pressure is achieved, then venting to

atmosphere, and finally pulling down to a vacuum

(optional for A2L). This process shall be repeated until

no refrigerant is within the system (optional for A2L).

When the final oxygenfree nitrogen charge is used, the

system shall be vented down to atmospheric pressure

to enable work to take place. Ensure that the outlet for

the vacuum pump is not close to any potential ignition

sources and that ventilation is available.

6 31-5000951 Rev. 0

Important Safety Information

IMPORTANT

Cont.

• In addition to conventional charging procedures, the

following requirements shall be followed.

– Ensure that contamination of different refrigerants

does not occur when using charging equipment. Hoses

or lines shall be as short as possible to minimize the

amount of refrigerant contained in them.

– Cylinders shall be kept in an appropriate position

according to the instructions.

– Ensure that the REFRIGERATING SYSTEM is

grounded prior to charging the system with refrigerant.

– Label the system when charging is complete (if not

already).

– Extreme care shall be taken not to overfill the

REFRIGERATING SYSTEM.

• Prior to recharging the system, it shall be pressure

tested with the appropriate purging gas. The system

shall be leak tested on completion of charging, but prior

to commissioning. A follow up leak test shall be carried

out prior to leaving the site.

• Prior to beginning work on systems containing flammable

refrigerants, safety checks are necessary to ensure that

the risk of ignition is minimized.

• During repairs to sealed components, all electrical

supplies shall be disconnected from the equipment

being worked upon prior to any removal of sealed

covers, etc. If it is absolutely necessary to have an

electrical supply to equipment during servicing, then a

permanently operating form of leak detection shall be

located at the most critical point to warn of a potentially

hazardous situation.

• Particular attention shall be paid to the following to

ensure that by working on electrical components, the

casing is not altered in such a way that the level of

protection is affected. This shall include damage to

cables, excessive number of connections, terminals

not made to original specification, damage to seals,

incorrect fitting of glands, etc.

– Ensure that the apparatus is mounted securely.

– Ensure that seals or sealing materials have not degraded

to the point that they no longer serve the purpose of

preventing the ingress of flammable atmospheres.

Replacement parts shall be in accordance with the

manufacturer’s specifications.

• Before carrying out work on systems containing

refrigerant, it is essential that the technician is completely

familiar with the equipment and all its detail. It is

recommended good practice that all refrigerants are

recovered safely. Prior to the task being carried out, an

oil and refrigerant sample shall be taken in case analysis

is required prior to re-use of recovered refrigerant. It is

essential that electrical power is available before the

task is commenced.

• Steps to ensure this are: becoming familiar with

the equipment and its operation, isolating the system

electrically, ensuring that before attempting the

procedure that mechanical handling equipment is

available, if required, for handling refrigerant cylinders,

and that all personal protective equipment is available

and being used correctly while the recovery process

is supervised at all times by a competent person and

that the recovery equipment and cylinders conform to

the appropriate standards. Additionally, pump down

refrigerant system, if possible, and if a vacuum is not

possible, make a manifold so that refrigerant can be

removed from various parts of the system. Make sure

that cylinders are situated on the scales before recovery

takes place. Start the recovery machine and operate in

accordance with instructions. Do not overfill cylinders

(no more than 80 % volume liquid charge). Do not

exceed the maximum working pressure of the cylinder,

even temporarily. When the cylinders have been filled

correctly and the process completed, make sure that

the cylinders and the equipment are removed from site

promptly and all isolation valves on the equipment are

closed off. Recovered refrigerant shall not be charged

into another refrigerating system unless it has been

cleaned and checked.

• After completion of field piping for split systems, the

field pipework shall be pressure tested with an inert gas

and then vacuum tested prior to refrigerant charging,

according to the following requirements;

– Field-made refrigerant joints indoors shall be tightness

tested. The test method shall have a sensitivity of .2 oz.

per year of refrigerant or better, under pressure. No leak

shall be detected.

READ AND SAVE THESE INSTRUCTIONS

31-5000951 Rev. 0 7

IMPORTANT

Cont.

• When removing refrigerant from a system, either for

servicing or decommissioning, it is recommended good

practice that all refrigerants are removed safely.

• When transferring refrigerant into cylinders, ensure

that only appropriate refrigerant recovery cylinders are

employed. Ensure that the correct number of cylinders

for holding the total system charge is available. All

cylinders to be used are designated for the recovered

refrigerant and labelled for that refrigerant (i. e. special

cylinders for the recovery of refrigerant). Cylinders shall

be complete with pressure-relief valve and associated

shut-off valves in good working order. Empty recovery

cylinders are evacuated and, if possible, cooled before

recovery occurs.

• The recovery equipment shall be in good working order

with a set of instructions concerning the equipment that

is at hand and shall be suitable for the recovery of all

appropriate refrigerants including, when applicable,

flammable refrigerants. In addition, a set of calibrated

weighing scales shall be available and in good working

order. Hoses shall be complete with leak-free disconnect

couplings and in good condition. Before using the

recovery machine, check that it is in satisfactory working

order, has been properly maintained and that any

associated electrical components are sealed to prevent

ignition in the event of a refrigerant release. Consult

manufacturer if in doubt.

• The recovered refrigerant shall be returned to the

refrigerant supplier in the correct recovery cylinder,

and the relevant waste transfer note arranged. Do not

mix refrigerants in recovery units and especially not in

cylinders.

• If compressors or compressor oils are to be removed,

ensure that they have been evacuated to an acceptable

level to make certain that flammable refrigerant does

not remain within the lubricant. The evacuation process

shall be carried out prior to returning the compressor to

the suppliers. Only electric heating to the compressor

body shall be employed to accelerate this process.

When oil is drained from a system, it shall be carried

out safely.

• The Clean Air Act of 1990 bans the intentional venting of

refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.

Approved methods of recovery, recycling or reclaiming

must be followed. Fines and/or incarceration may be

levied for noncompliance.

Important Safety Information

READ AND SAVE THESE INSTRUCTIONS

8 31-5000951 Rev. 0

NOTE – R-454B is an A2L refrigerant. The system installation must meet the following parameters based upon total

refrigerant charge (line set included). TAmin (Total minimum conditioned area) is the minimum allowable conditioned

area based upon the total system charge at sea level. Values must be multiplied by altitude adjustment factor at

installed altitude.

Qmin table refers to minimum airflow requirements during refrigerant leak mitigation by the refrigerant detection system,

based upon total system charge.

See tables below.

TAmin Table

Charge (lbs) 10.0 15.0 20.0 25.0 30.0

Charge (kg) 4.5 6.8 9.1 11.3 13.6

Minimum Conditioned Area (ft²) 149.9 224.9 299.9 374.8 449.8

Minimum Conditioned Area (m²) 13.9 20.9 27.9 34.8 41.8

NOTE –7DEOHLVEDVHGRQWKHFRQ¿JXUDWLRQZKHUHWKHGLVFKDUJHSRUWDQGDLUUHWXUQSRUWLQWKHURRPLVKLJKHUWKDQP

NOTE – Multiply values in TAmin table by the Altitude Adjustment Factors to correct TAmin based on installed altitude.

Altitude Adjustment Factor

Altitude (m) 0 200 400 600 800 1000 1200 1400 1600

Altitude (ft) 0 660 1310 1970 2620 3280 3940 4590 5250

Adj. Factor 1 1 1 1 1.02 1.05 1.04 1.1 1.12

Altitude (m) 1600 1800 2000 2200 2400 2600 2800 3000 3200

Altitude (ft) 5250 5910 6560 7220 7870 8530 9190 9840 10500

Adj. Factor 1.12 1.15 1.18 1.21 1.25 1.28 1.32 1.36 1.4

Qmin Table

Refrigerant Charge lb (kg) CFM Required Refrigerant Charge lb (kg) CFM Required

5 (2.268) 135 18 (8.165) 487

6 (2.722) 162 19 (8.618) 514

7 (3.175) 189 20 (9.072) 541

8 (3.629) 216 21 (9.525) 568

9 (4.082) 244 22 (9.979) 595

10 (4.536) 271 23 (10.433) 622

11 (4.990) 298 24 (10.886) 649

12 (5.443) 325 25 (11.340) 676

13 (5.897) 352 26 (11.793) 704

14 (6.350) 379 27 (12.247) 731

15 (6.804) 406 28 (12.701) 758

16 (7.257) 433 29 (13.154) 785

17 (7.711) 460 30 (13.608) 812

NOTE – Qmin minimum airfow requirement for refrigerant leak mitigation.

Installation Instructions

31-5000951 Rev. 0 9

Installation Clearances

NOTES:

• Service clearance of 30” (762 mm) must be maintained

on one of the sides, adjacent to the control box.

• Clearance to one of the other three sides must be 36”

(914 mm).

• Clearance to one of the remaining two sides may be 12”

(305 mm) and the final side may be 6” (152 mm).

• A clearance of 24” (610 mm) must be maintained

between two units.

• 48” (1219 mm) clearance required on top of unit.

Model Number Identification

See

NOTES

See NOTES

See

NOTES

Control

Box

Installation Instructions

MAJOR / MINOR

REVISION

REFRIGERANT

5 - R454B

VOLTAGE

A - 208/230 1PH 60HZ

DESIGN VARIANT

S - SPECIFIED

BRAND

N-GE

PRODUCT

S - SPLIT

SEER

APPLICATION

H - HEAT PUMP

COOLING CAPACITY

(1000BTU/HR)

18, 24, 30, 36, 42, 48, 60

N S A – XX

H 24

S 5

10 31-5000951 Rev. 0

Unit Dimensions

SUCTION AND

SIDE VIEW

DISCHARGE AIR

SIDE VIEW

LIQUID LINE

CONNECTION

OUTDOOR

COIL FAN

COMPRESSOR

OPTIONAL UNIT

STANDOFF KIT (4)

(FIELD INSTALLED)

4-3/8

INLET

AIR

INLET

AIR

TOP VIEW

INLET AIR

SUCTION LINE

CONNECTION

LIQUID LINE

CONNECTION

6-3/8

(162)

TOP VIEW BASE SECTION

COMPRESSOR

COIL DRAIN OUTLETS

(Around perimeter of base)

OPTIONAL UNIT

STAND-OFF KIT (4)

(Field Installed)

(111)

4-3/8

6-3/8

(162)

(111)

(111

() 111)

4-3/8

(111)

2 (51)

3/4 (19)

2-3/4 (70)

ELECTRICAL

INLETS

Size A B C

In. mm in. mm in. mm

018 28-1/4 718 43-1/4 1099 42-1/2 1080

024 28-1/4 718 43-1/4 1099 42-1/2 1080

030 28-1/4 718 33-1/4 845 32-1/2 826

036 32-1/4 817 33-1/4 845 36-1/2 927

042 32-1/4 817 37-1/4 946 36-1/2 927

048 32-1/4 817 37-1/4 946 28-1/2 724

060 32-1/4 817 37-1/4 946 42-1/2 1080

Installation Instructions

31-5000951 Rev. 0 11

SPECIFICATIONS

Size 018 024 030 036

Nominal Tonnage 1.5 2 2.5 3

Sound Rating Number dBA 74 75

Connections (Sweat)

Liquid line (OD) - in. 3/8

Suction line (OD) - in. 3/4 7/8

Refrigerant Type ¹ R-454B charge furnished 4 lbs. 7 oz. 5 lbs. 3 oz. 6 lbs. 7 oz. 7 lbs. 2 oz.

Indoor Unit Expansion Valve (TXV) 26Z70

Outdoor Coil

Net face area - ft.²

Outer coil 24.5 18.7 22.2

Inner coil - - - 18.0 21.5

Tube diameter - in. 5/16

Rows 1 2

Fins - in 22

Outdoor Fan

HP 1/8 1/6 1/5

Diameter - in. 22 26

Blades 3

Cfm 2840 2670 3590

Rpm 825 839

Watts 127 162 200

Shipping Data - lbs. 185 220

ELECTRICAL DATA

Line voltage data (Volts-Phase-Hz) 208/230-1-60

² Maximum overcurrent protection (MOCP) amps (unit) 15 20 25 35

³ Minimum circuit ampacity (MCA) (unit) 9.7 13.6 16.6 22.2

Compressor

Rated load amps 7.2 10.3 12.5 16.7

Locked rotor amps 47 60.2 67 93.5

Fan Motor Full load amps 0.7 1.0 1.4

OPTIONAL CONTROLS - ORDER SEPARATELY

Accessory Part No. 018 024 030 036

Remote Outdoor Temperature Sensor X2658

OPTIONAL ACCESSORIES - ORDER SEPARATELY

Accessory Part No. 018 024 030 036

Compressor Crankcase Heater

Copeland - 27V63

Factory

LG - 27U16

Factory

Compressor Hard Start Kit

Copeland - 10J42

LG - 88M91

Compressor Sound Cover 18J42

Compressor Low Ambient Cut-Off 45F08

Freezestat - 3/8 in. 93G35

Indoor Blower Off Delay Relay 58M81

຾/RZ$PELHQW.LW 54M89

Mild Weather Kit 11B97

Outdoor Thermostat Kit

Thermostat - 10Z23

Mounting Box - 31416

Unit Stand-Off Kit 94J45

NOTE - Extremes of operating range are plus 10% and minus 5% of line voltage.

¹ Refrigerant charge is sufficient for 15 ft. length of refrigerant lines. For longer line set requirements see the Installation Instructions for information about line set length and additional refrigerant charge

required.

² HACR type breaker or fuse.

³ Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.

຾&UDQNFDVH+HDWHUDQG)UHH]HVWDWDUHUHFRPPHQGHGZLWK/RZ$PELHQW.LW

Installation Instructions

12 31-5000951 Rev. 0

SPECIFICATIONS

Size 042 048 060

Nominal Tonnage 3.5 4 5

Sound Rating Number dBA 78 79

Connections (Sweat)

Liquid line (OD) - in. 3/8

Suction line (OD) - in. 7/8 1-1/8

Refrigerant Type ¹ R-454B charge furnished 8 lbs. 5 oz. 8 lbs. 6 oz. 9 lbs. 6 oz.

Indoor Unit Expansion Valve (TXV) 26Z71 26Z72

Outdoor Coil

Net face area - ft.²

Outer coil 24.93 29.09

Inner coil 24.13 28.16

Tube diameter - in. 5/16

Rows 2

Fins - in 22

Outdoor Fan

HP 1/3

Diameter - in. 26

Blades 4

Cfm 4110 4060

Rpm 825

Watts 213 224

Shipping Data - lbs. 250 260

ELECTRICAL DATA

Line voltage data (Volts-Phase-Hz) 208/230-1-60

² Maximum overcurrent protection (MOCP) amps (unit) 35 50

³ Minimum circuit ampacity (MCA) (unit) 22.3 30.6 32.2

Compressor

Rated load amps 15.8 22.4 23.7

Locked rotor amps 96 126 157

Fan Motor Full load amps 2.6

OPTIONAL CONTROLS - ORDER SEPARATELY

Accessory Part No. 042 048 060

Remote Outdoor Temperature Sensor X2658

OPTIONAL ACCESSORIES - ORDER SEPARATELY

Accessory Part No. 042 048 060

Compressor Hard Start Kit

Copeland - 10J42

LG - 88M91

Compressor Low Ambient Cut-Off 45F08

Compressor Sound Cover 18J42

Freezestat - 3/8 in. 93G35

Indoor Blower Off Delay Relay 58M81

຾/RZ$PELHQW.LW 54M89

Mild Weather Kit 11B97

Outdoor Thermostat Kit

Thermostat - 10Z23

Mounting Box - 31416

Unit Stand-Off Kit 94J45

NOTE - Extremes of operating range are plus 10% and minus 5% of line voltage.

required.

² HACR type breaker or fuse.

³ Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.

຾&UDQNFDVH+HDWHUDQG)UHH]HVWDWDUHUHFRPPHQGHGZLWK/RZ$PELHQW.LW

Installation Instructions

31-5000951 Rev. 0 13

Typical Unit Parts Arrangement

FIGURE 1. Typical Plumbing Arrangement

Discharge Line

Low Pressure Switch

Reversing Valve

High Pressure Switch

Bi-Flow Filter Drier

Check / Expansion Valve

Defrost Coil Sensor

Vapor Line Service Valve

Liquid Line Service Valve

Installation Instructions

14 31-5000951 Rev. 0

Operating Gauge Set and Service Valves

TORQUE REQUIREMENTS

When servicing or repairing heating, ventilating, and

air conditioning components, ensure the fasteners are

appropriately tightened. Table 1 lists torque values for

fasteners.

IMPORTANT

• Only use Allen wrenches of sufficient hardness (50Rc

- Rockwell Harness Scale minimum). Fully insert the

wrench into the valve stem recess.

• Service valve stems are factory-torqued (from 9 ft-lbs

for small valves, to 25 ft-lbs for large valves) to prevent

refrigerant loss during shipping and handling. Using an

Allen wrench rated at less than 50Rc risks rounding

or breaking off the wrench, or stripping the valve stem

recess.

• See the GE Appliances Service and Application Notes

for further details and information.

• To prevent stripping of the various caps used, the

appropriately sized wrench should be used and fitted

snugly over the cap before tightening.

TABLE 1. Torque Requirements

Parts Recommended Torque

Service valve cap 8 ft.- lb. 11 NM

Sheet metal screws 16 ft.- lb. 2 NM

Machine screws #10 28 ft.- lb. 3 NM

Compressor bolts 90 in.- lb. 10 NM

Gauge port seal cap 8 ft.- lb. 11 NM

USING MANIFOLD GAUGE SET

When checking the system charge, only use a manifold

gauge set that features low loss anti-blow back fittings.

Manifold gauge set used with R-454B refrigerant systems

must be capable of handling the higher system operating

pressures. The gauges should be rated for use with

pressures of 0 - 800 psig on the high side and a low side

of 30” vacuum to 250 psig with dampened speed to 500

psi. Gauge hoses must be rated for use at up to 800 psig

of pressure with a 4000 psig burst rating.

OPERATING SERVICE VALVES

The liquid and vapor line service valves are used for

removing refrigerant, flushing, leak testing, evacuating,

checking charge and charging. Each valve is equipped

with a service port which has a factory-installed valve

stem. Figure 2 provides information on how to access and

operate both angle and ball service valves

Installation Instructions

31-5000951 Rev. 0 15

Service Valves

ANGLE AND BALL

1. Remove stem cap with an appropriately sized wrench.

2. Use a service wrench with a hex-head extension (3/16” for liquid line valve sizes and 5/16” for vapor line valve sizes)

to back the stem out counterclockwise as far as it will go.

Operating Ball Type Service Valve:

1. Remove stem cap with an appropriately sized wrench.

2. Use an appropriately sized wrenched to open. To open

valve, roate stem counterclockwise 90°. To close rotate

stem clockwise 90°.

To Access Service Port:

A service port cap protects the service port core from

contamination and serves as the primary leak seal.

1. Remove service port cap with an appropriately sized

wrench.

2. Connect gauge set to service port.

3. When testing is completed, replace service port cap

and tighten as follows:

• With torque wrench: Finger tighten

and torque cap per Table 1.

• Without torque wrench: Finger

tighten and use an appropriately

sized wrench to turn an additional 1/6

turn clockwise.

Reinstall Stem Cap:

Stem cap protects the valve stem from damage and serves

as the primary seal. Replace the stem cap and tighten as

follows:

• With Torque Wrench: Finger tighten

and then torque cap per Table 1.

• Without Torque Wrench: Finger

tighten and use an appropriately sized

wrench to turn an additional 1/12 turn

clockwise.

To Indoor Unit

Service Port Core

To Outdoor Unit

Stem Cap

(Valve Stem Shown Open)

Insert Hex Wrench Here

Service Port Cap

(Valve Stem Shown Closed)

Insert Hex Wrench Here

NOTE — A label with specific torque requirements may be affixed to the stem cap. If the label is present, use the

specified torque.

FIGURE 2. Angle and Ball Service Valves

To OPEN, rotate stem

counterclockwise 90°.

To CLOSE, rotate

stem clockwise 90°.

Service Port Core

Service Port

Service Port Cap

To Outdoor Unit

To Indoor Unit

Stem Cap

Ball (shown

closed)

Valve

Stem

1/6 TURN

1/12 TURN

Installation Instructions

16 31-5000951 Rev. 0

Placement and Slab Mounting

Detail A Detail B

Install unit level or, if on a slope, maintain slope

tolerance of 2 degrees (or 2 inches per 5 feet [50 mm

per 1.5 m]) away from building structure.

Two 90º elbows installed in line

set will reduce line set vibration

Install unit away

from windows

Building

Structure

Discharge Air

Mounting Slab

Ground Level

FIGURE 3. Placement and Slab Mounting

Unit Placement

See Unit Dimensions on Page 10 for sizing mounting

slab, platforms or supports. Refer to Page 9 for mandatory

installation clearance requirements.

CAUTION

In order to avoid injury, take proper

precaution when lifting heavy objects.

POSITIONING CONSIDERATIONS

Consider the following when positioning the unit:

• Some localities are adopting sound ordinances based

on the unit’s sound level registered from the adjacent

property, not from the installation property. Install the unit

as far as possible from the property line.

• When possible, do not install the unit directly outside

a window. Glass has a very high level of sound

transmission.

For proper placement of unit in relation to a window see

the provided illustration in Figure 3, Detail A.

PLACING UNIT ON SLAB

When installing unit at grade level, the top of the slab

should be high enough above grade so that water from

higher ground will not collect around the unit. The slab

should have a slope tolerance as described in Figure 3,

Detail B.

ROOF MOUNTING

Install the unit a minimum of 6 inches (152 mm) above the

roof surface to avoid ice build-up around the unit. Locate

the unit above a load bearing wall or area of the roof that

can adequately support the unit. Consult local codes for

rooftop applications.

If unit coil cannot be mounted away from prevailing winter

winds, a wind barrier should be constructed. Size barrier

at least the same height and width as outdoor unit. Mount

barrier 24 inches (610 mm) from the sides of the unit in the

direction of prevailing winds.

NOTICE

Roof Damage!

This system contains both refrigerant and oil. Some

rubber roofing material may absorb oil, causing the

rubber to swell. Bubbles in the rubber roofing material

can cause leaks. Protect the roof surface to avoid

exposure to refrigerant and oil during service and

installation. Failure to follow this notice could result in

damage to roof surface.

Installation Instructions

31-5000951 Rev. 0 17

Removing and Installing Louvered Panels

WARNING

To prevent personal injury, or damage to panels, unit or structure, be sure to observe the following:

• While installing or servicing this unit, carefully stow all removed panels out of the way, so that the panels will not cause

injury to personnel, nor cause damage to objects or structures nearby, nor will the panels be subjected to damage

(e.g., being bent or scratched).

• While handling or stowing the panels, consider any weather conditions, especially windy conditions, that may cause

panels to be blown around and battered.

STEP 1

To remove panel,

remove mounting

screws securing panel

to the unit.

STEP 2

Slightly lift panel in

order to clear side lips

of panel from base of

unit.

STEP 3

Tilt panel out slightly

and pull downward to

remove.

STEP 1

Insert panel under unit top cap lip and lift slightly to clear

side lip of panel from base.

STEP 2

Move panel in

towards unit. Align

left/right side lips of

panel with groove

inserts along left/

right side of unit.

STEP 3

Secure panel, with

mounting screws.

PANEL INSTALLATION

Panel Center

Corner Post

Panel Left

Panel Right

Corner

Post

Top Cap

Side

Groove

Base

REMOVAL

FIGURE 4. Louvered Panels

Installation Instructions

18 31-5000951 Rev. 0

New or Replacement Line Set

This section provides information on new installation or

replacement of existing line set. If a new or replacement

line set is not required, then proceed to Brazing

Connections on Page 20.

If refrigerant lines are routed through a wall, seal and

isolate the opening so vibration is not transmitted to the

building. Pay close attention to line set isolation during

installation of any HVAC system. When properly isolated

from building structures (walls, ceilings. floors), the

refrigerant lines will not create unnecessary vibration and

subsequent sounds.

REFRIGERANT LINE SET

Field refrigerant piping consists of liquid and suction lines

from the outdoor unit (braze connections) to the indoor

unit coil (flare or braze connections).

TABLE 2

REFRIGERANT LINE SET – INCHES (MM)

Model

Valve Field Connections Recommended Line Set

Liquid Line Vapor Line Liquid Line Vapor Line

– 018

3/8”

(10mm)

3/4”

(19mm)

3/8”

(10mm)

3/4”

(19mm)

– 024

– 030

– 036

7/8”

(22mm)

7/8”

(22mm)

– 042

– 048

– 060

1-1/8”

(28mm)

1-1/8”

(28mm)

NOTE - Some applications may require a field-provided 7/8” to 1-1/8” adapter.

NOTE – When installing refrigerant lines longer than 50

feet, contact GE Appliances Technical Support Product

Applications for assistance or GE Appliances piping

manual. To obtain the correct information from GE

Appliances, be sure to communicate the following points:

• Model NS16H and size of unit (e.g. -060).

• Line set diameters for the unit being installed as listed in

table 2 and total length of installation.

• Number of elbows and if there is a rise or drop of the

piping.

IMPORTANT

Mineral oils are not compatible with R-454B. If oil must be

added, it must be a Polyol ester oil.

The compressor is charged with sufficient Polyol ester oil

for line set lengths up to 50 feet. Recommend adding oil to

system based on the amount of refrigerant charge in the

system. No need to add oil in system with 20 pounds of

refrigerant or less. For systems over 20 pounds - add one

ounce for every five pounds of refrigerant.

Recommended topping-off POE oils are Mobil EAL

$5&7,&&&RU,&,(0.$5$7(5/&)

LINE SET ISOLATION

IMPORTANT

If this unit is being matched with an approved line set

or indoor unit coil that was previously charged with

mineral oil, or if it is being matched with a coil which was

manufactured before January of 1999, the coil and line

set must be flushed prior to installation. Take care to

empty all existing traps. Polyol ester (POE) oils are used

in GE Appliances units charged with R-454B refrigerant.

Residual mineral oil can act as an insulator, preventing

proper heat transfer. It can also clog the expansion device

and reduce system performance and capacity. Failure

to properly flush the system, per this instruction and the

detailed Installation and Service Procedures manual will

void the warranty.

Installation Instructions

31-5000951 Rev. 0 19

ANCHORED HEAVY NYLON

WIRE TIE OR AUTOMOTIVE

MUFFLER‐TYPE HANGER

STRAP LIQUID LINE TO

VAPOR LINE

WALL

STUD

LIQUID LINE

NON-CORROSIVE

METAL SLEEVE

VAPOR LINE - WRAPPED

IN ARMAFLEX

AUTOMOTIVE

MUFFLER‐TYPE HANGER

REFRIGERANT LINE SET — TRANSITION

FROM VERTICAL TO HORIZONTAL

Line Set Isolation — The following illustrations are

examples of proper refrigerant line set isolation:

STRAPPING

MATERIAL (AROUND

VAPOR LINE ONLY)

TAPE OR

WIRE TIE

WIRE TIE (AROUND

VAPOR LINE ONLY)

FLOOR JOIST OR

ROOF RAFTER

TAPE OR

WIRE TIE

To hang line set from joist or rafter, use either metal strapping material

or anchored heavy nylon wire ties.

8 FEET (2.43 METERS)

STRAP THE VAPOR LINE TO THE JOIST

OR RAFTER AT 8 FEET (2.43 METERS)

INTERVALS THEN STRAP THE LIQUID

LINE TO THE VAPOR LINE.

FLOOR JOIST OR

ROOF RAFTER

REFRIGERANT LINE SET — INSTALLING

HORIZONTAL RUNS

NOTE — Similar installation practices should be used if line set is

to be installed on exterior of outside wall.

PVC

PIPE

FIBERGLASS

INSULATION

CAULK

OUTSIDE

WALL

VAPOR LINE WRAPPED

WITH ARMAFLEX

LIQUID

LINE

OUTSIDE WALL

LIQUID LINE

VAPOR LINE

WOOD BLOCK

BETWEEN STUDS

STRAP

WOOD BLOCK

STRAP

SLEEVE

WIRE TIE

INSIDE WALL

REFRIGERANT LINE SET — INSTALLING

VERTICAL RUNS (NEW CONSTRUCTION SHOWN)

INSTALLATION

LINE SET

NOTE — Insulate liquid line when it is routed through areas where the

surrounding ambient temperature could become higher than the

temperature of the liquid line or when pressure drop is equal to or greater

than 20 psig.

NON-CORROSIVE

METAL SLEEVE

IMPORTANT — Refrigerant lines must not contact structure.

NON-CORROSIVE

METAL SLEEVE

8 FEET (2.43 METERS)

IMPORTANT — Refrigerant lines must not contact wall

WARNING — Polyol ester (POE) oils used with R-454B

refrigerant absorb moisture veryquickly. Itis very important thatthe

refrigerant system be kept closed as much as possible. DO NOT

remove line set caps or service valve stub caps until you are ready

to make connections.

FIGURE 5. Line Set Installation

Installation Instructions

20 31-5000951 Rev. 0

Brazing Connections

Use the procedures outlined in Figure 6 and Figure 7 for brazing line set connections to service valves.

WARNING

Danger of fire. Bleeding the refrigerant

charge from only the high side may result

in pressurization of the low side shell and

suction tubing. Application of a brazing torch

to a pressurized system may result in ignition

of the refrigerant and oil mixture. Check the

high and low pressures before applying heat.

WARNING

When using a high pressure gas such as

nitrogen to pressurize a refrigeration or air

conditioning system, use a regulator that can

control the pressure down to 1 or 2 psig (6.9

to 13.8 kPa).

CAUTION

• Brazing alloys and flux contain materials which are

hazardous to your health.

• Avoid breathing vapors or fumes from brazing operations.

Perform operations only in well-ventilated areas.

• Wear gloves and protective goggles or face shield to

protect against burns.

• Wash hands with soap and water after handling brazing

alloys and flux.

IMPORTANT

• Allow braze joint to cool before removing the wet rag

from the service valve. Temperatures above 250ºF can

damage valve seals.

• Use silver alloy brazing rods with 5% minimum silver

alloy for copper-to-copper brazing. Use 45% minimum

alloy for copper-to-brass and copper-to-steel brazing.

WARNING

Fire, Explosion and Personal Safety hazard.

Failure to follow this warning could result in

damage, personal injury or death.

Never use oxygen to pressurize or purge

refrigeration lines. Oxygen, when exposed to

a spark or open flame, can cause fire and/

or an explosion, that could result in property

damage, personal injury or death.

Installation Instructions

31-5000951 Rev. 0 21

Brazing Procedures

1. CUT AND DEBUR

Cut ends of the refrigerant lines square (free from nicks

or dents) and debur the ends. The pipe must remain

round. Do not crimp end of the line.

2. CAP AND CORE REMOVAL

Remove service cap and core from both the suction /

vapor and liquid line service ports.

LIQUID LINE SERVICE

VALVE

SERVICE

PORT

CORE

SERVICE PORT

CAP

SERVICE

PORT

CORE

SERVICE

PORT CAP

CUT AND DEBUR

LINE SET SIZE MATCHES

SERVICE VALVE CONNECTION

COPPER TUBE

STUB

SERVICE VALVE

CONNECTION

REFRIGERANT LINE

DO NOT CRIMP SERVICE VALVE

CONNECTOR WHEN PIPE IS

SMALLER THAN CONNECTION

REDUCER

SUCTION / VAPOR LINE

SERVICE VALVE

LINE SET SIZE IS SMALLER

THAN CONNECTION

3. ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LIQUID AND SUCTION / VAPOR LINE SERVICE VALVES

Flow regulated nitrogen (at 1 to 2 psig) through the low-side refrigeration gauge set into the liquid line service port valve,

and out of the suction / vapor line service port valve.

A. Connect gauge set low pressure side to liquid line service valve (service port).

B. Connect gauge set center port to bottle of nitrogen with regulator.

C. Remove core from valve in suction / vapor line service port to allow nitrogen to escape

OUTDOOR

UNIT

LIQUID LINE

VAPOR LINE

LIQUID LINE SERVICE

VALVE

SUCTION /

VAPOR LINE

SERVICE

VALVE

ATTACH

GAUGES

INDOOR

UNIT

SUCTION / VAPOR SERVICE PORT MUST BE

OPEN TO ALLOW EXIT POINT FOR NITROGEN

NITROGEN

HIGHLOW

USE REGULATOR TO FLOW

NITROGEN AT 1 TO 2 PSIG.

WHEN BRAZING LINE SET TO

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

Installation Instructions

22 31-5000951 Rev. 0

Brazing Procedures (cont.)

4. WRAP SERVICE VALVES

To help protect service valve seals during brazing, wrap water saturated cloths around service valve bodies and copper

tube stubs. Use additional water saturated cloths underneath the valve body to protect the base paint.

5. FLOW NITROGEN

Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the

liquid service valve and out of the suction / vapor valve stem port. See steps 3A, 3B and 3C on manifold gauge set

connections.

6. BRAZE LINE SET

Wrap both service valves with water saturated cloths as illustrated here and as mentioned in step 4, before brazing to

line set. Water saturated cloths must remain water saturated throughout the brazing and cool-down process.

7. PREPARATION FOR NEXT STEP

After all connections have been brazed, disconnect manifold gauge set from service ports. Apply additional water

saturated cloths to both services valves to cool piping. Once piping is cool, remove all water saturated cloths. Refer to

the unit installation instructions for the next step in preparing the unit.

WHEN BRAZING LINE SET TO

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

LIQUID LINE SERVICE VALVE

LIQUID LINE

WATER-SATURATED

CLOTH

SUCTION LINE

WATER-SATURATED

CLOTH

SUCTION LINE SERVICE

VALVE

WHEN BRAZING LINE SET TO

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

IMPORTANT

Allow braze joint to cool. Apply

additional water saturated cloths to help cool brazed

joint. Do not remove water saturated cloths until piping

has cooled. Temperatures above 250ºF will damage

valve seals.

WARNING

1. FIRE, PERSONAL INJURY, OR

PROPERTY DAMAGE may result

if you do not wrap a water saturated

cloth around both liquid and suction

line service valve bodies and copper

tube stub while brazing in the line set!

The braze, when complete, must be

quenched with water to absorb any

residual heat.

2. Do not open service valves until

refrigerant lines and indoor coil have

been leak-tested and evacuated.

Refer to procedures provided in this

supplement.

Installation Instructions

31-5000951 Rev. 0 23

Flushing Line Set and Indoor Coil

1. TYPICAL EXISTING EXPANSION VALVE REMOVAL

PROCEDURE (UNCASED COIL SHOWN)

SENSING

LINE

TWO PIECE PATCH PLATE

(UNCASED COIL ONLY)

VAPOR

LINE

DISTRIBUTOR

ASSEMBLY

DISTRIBUTOR

TUBES

LIQUID

LINE

MALE EQUALIZER

LINE FITTING

EQUALIZER

LINE

CHECK

EXPANSION

VALVE

TEFLON

RING

STUB END

TEFLON

RING

SENSING BULB

LIQUID LINE

ORIFICE

HOUSING

LIQUID LINE

ASSEMBLY WITH

BRASS NUT

A. On fully cased coils, remove the coil access and

plumbing panels.

B. Remove any shipping clamps holding the liquid line and

distributor assembly.

C. Disconnect the equalizer line from the check expansion

valve equalizer line fitting on the vapor line.

D. Remove the vapor line sensing bulb.

E. Disconnect the liquid line from the check expansion

valve at the liquid line assembly.

F. Disconnect the check expansion valve from the liquid

line orifice housing. Take care not to twist or damage

distributor tubes during this process.

G. Remove and discard check expansion valve and the

two Teflon

rings.

H. Use a field-provided fitting to temporary reconnect the

liquid line to the indoor unit’s liquid line orifice housing.

2. CONNECT GAUGES AND EQUIPMENT FOR

FLUSHING PROCEDURE

LOW HIGH

EXISTING

INDOOR

UNIT

GAUGE

MANIFOLD

INVERTED CYLINDER

CONTAINS CLEAN

HCFC22* TO BE USED

FOR FLUSHING.

LIQUID LINE SERVICE

VALVE

INLET

DISCHARGE

TANK

RETURN

CLOSED

OPENED

RECOVERY CYLINDER

RECOVERY MACHINE

NEW

OUTDOOR

UNIT

VAPOR LINE

SERVICE VALVE

VAPOR

LIQUID

A. Inverted HCFC-22 cylinder with clean refrigerant* to the

vapor service valve.

B. HCFC-22 gauge set (low side) to the liquid line valve.

C. HCFC-22 gauge set center port to inlet on the recovery

machine with an empty recovery tank to the gauge set.

D. Connect recovery tank to recovery machines per

machine instructions.

3. FLUSHING LINE SET

The line set and indoor unit coil must be flushed with at

least the same amount of clean refrigerant* that previously

charged the system. Check the charge in the flushing

cylinder before proceeding.

A. Set the recovery machine for liquid recovery and start

the recovery machine. Open the gauge set valves to

allow the recovery machine to pull a vacuum on the

existing system line set and indoor unit coil.

B. Invert the cylinder of clean HCFC-22* and open its

valve to allow liquid refrigerant to flow into the system

through the vapor line valve. Allow the refrigerant to

pass from the cylinder and through the line set and the

indoor unit coil before it enters the recovery machine.

C. After all of the liquid refrigerant has been recovered,

switch the recovery machine to vapor recovery so

that all of the HCFC-22 vapor is recovered. Allow the

recovery machine to pull the system down to 0.

D. Close the valve on the inverted HCFC-22 drum and the

gauge set valves. Pump the remaining refrigerant out

of the recovery machine and turn the machine off.

*IMPORTANT - Clean refrigerant is any refrigerant in a system that has not had compressor burn out. If the system has

experienced burn out, it is recommended that the existing line set and indoor coil be replaced.

Installation Instructions

24 31-5000951 Rev. 0

Installing Indoor Metering Device

This outdoor unit is designed for use in systems that use a

check / expansion valve metering device at the indoor coil.

See the NS16H Product Specification bulletin for approved

expansion valve kit match-ups. The expansion valve unit

can be installed internal or external to the indoor coil. In

applications where an uncased coil is being installed in

a field-provided plenum, install the expansion valve in a

manner that will provide access for field servicing of the

expansion valve. Refer to below illustration for reference

during installation of expansion valve unit.

INDOOR EXPANSION VALVE INSTALLATION

A. Remove the field-provided fitting that temporary

reconnected the liquid line to the indoor unit’s distributor

assembly.

B. Install one of the provided Teflon® rings around the

stubbed end of the expansion valve and lightly lubricate

the connector threads and expose surface of the

Teflon® ring with refrigerant oil.

C. Attach the stubbed end of the expansion valve to the

liquid line orifice housing. Finger tighten and use an

appropriately sized wrench to turn an additional 1/2 turn

clockwise as illustrated in the figure above, or 20 ft-lb.

D. Place the remaining Teflon® washer around the other

end of the expansion valve. Lightly lubricate connector

threads and expose surface of the Teflon® ring with

refrigerant oil.

E. Attach the liquid line assembly to the expansion valve.

Finger tighten and use an appropriately sized wrench to

turn an additional 1/2 turn clockwise or 20 ft-lb.

EQUALIZER LINE INSTALLATION

A. Remove and discard either the flare seal cap or flare

nut with copper flare seal bonnet from the equalizer line

port on the vapor line as illustrated in the figure to the

right.

B. Remove and discard either the flare seal cap or flare

nut with copper flare seal bonnet from the equalizer line

port on the vapor line as illustrated in the figure to the

right.

VAPOR

LINE

FLARE

NUT

COPPER FLARE

SEAL BONNET

MALE BRASS

EQUALIZER

LINE FITTING

FLARE

SEAL CAP

SENSING BULB INSTALLATION

A. Attach the vapor line sensing bulb in the proper

orientation as illustrated to the right using the clamp

and screws provided.

NOTE — Confirm proper thermal contact between vapor

line and expansion bulb before insulating the sensing bulb

once installed.

B. Connect the equalizer line from the expansion valve

to the equalizer vapor port on the vapor line. Finger

tighten the flare nut plus 1/8 turn (7 ft-lbs) as illustrated

below.

ON 7/8” AND LARGER LINES,

MOUNT SENSING BULB AT

EITHER THE 4 OR 8 O'CLOCK

POSITION. NEVER MOUNT ON

BOTTOM OF LINE.

ON LINES SMALLER THAN

7/8”, MOUNT SENSING

BULB BETWEEN THE 3 AND

9 O'CLOCK POSITIONS.

BULB

VAPOR LINE

NOTE — NEVER MOUNT ON BOTTOM OF LINE.

BULB

3 O'CLOCK

TWO PIECE

PATCH PLATE

(UNCASED

COIL ONLY)

VAPOR

LINE

LIQUID LINE

ORIFICE

HOUSING

DISTRIBUTOR

TUBES

LIQUID LINE

MALE EQUALIZER LINE

FITTING (SEE

EQUALIZER LINE

INSTALLATION FOR

FURTHER DETAILS)

SENSING

LINE

EQUALIZER

LINE

EXPANSION

VALVE

TEFLON

RING

(Uncased Coil Shown)

Sensing bulb insulation is required if

mounted external to the coil casing. See

sensing bulb installation for bulb positioning.

STUB

END

TEFLON

RING

LIQUID LINE

ASSEMBLY WITH

BRASS NUT

DISTRIBUTOR

ASSEMBLY

1/2 Turn

1/8 Turn

Installation Instructions

31-5000951 Rev. 0 25

Leak Test Line Set and Indoor Coil

IMPORTANT

Leak detector must be capable of sensing HFC refrigerant.

1. CONNECT GAUGE SET

A. Connect an R-454B manifold gauge set high pressure hose to the vapor valve service port.

NOTE — Normally, the high pressure hose is connected to the liquid line port. However, connecting it to the vapor port

better protects the manifold gauge set from high pressure damage.

B. With both manifold valves closed,

connect the cylinder of R-454B

refrigerant to the center port of the

manifold gauge set.

NOTE — Later in the procedure, the

R-454B container will be replaced by the

nitrogen container.

2. TEST FOR LEAKS

After the line set has been connected to the indoor and outdoor units, check the line set connections and indoor unit for

leaks. Use the following procedure to test for leaks:

A. With both manifold valves closed, connect the cylinder of R-454B refrigerant to the center port of the manifold gauge

set. Open the valve on the R-454B cylinder (vapor only).

B. Open the high pressure side of the manifold to allow R-454B into the line set and indoor unit. Weigh in a trace amount

of R-454B. [A trace amount is a maximum of two ounces (57 g) refrigerant or three pounds (31 kPa) pressure]. Close

the valve on the R-454B cylinder and the valve on the high pressure side of the manifold gauge set. Disconnect the

R-454B cylinder.

C. Connect a cylinder of dry nitrogen with a pressure regulating valve to the center port of the manifold gauge set.

D. Adjust dry nitrogen pressure to 160 psig (1103 kPa). Open the valve on the high side of the manifold gauge set in

order to pressurize the line set and the indoor unit.

E. After a few minutes, open one of the service valve ports and verify that the refrigerant added to the system earlier

is measurable with a leak detector Once leak detector is confirmed operational, leak check the entire system (field

joints and line set included) to a sensitivity of 5 grams per year of refrigerant.

F. After leak testing, disconnect gauges from service ports.

TO VAPOR

SERVICE VALVE

R-454B

MANIFOLD GAUGE SET

OUTDOOR UNIT

HIGH

LOW

NITROGEN

NOTE - Position

canister to deliver

liquid refrigerant.

LEAK TEST

Installation Instructions

26 31-5000951 Rev. 0

Evacuating Line Set and Indoor Coil

1. CONNECT GAUGE SET

NOTE — Remove cores from service valves (if not already done).

A. Connect low side of manifold gauge set with 1/4 SAE in-line tee to vapor line service valve.

B. Connect high side of manifold gauge set to liquid line service valve.

C. Connect micron gauge available connector on the 1/4 SAE in-line tee.

D. Connect the vacuum pump (with vacuum gauge) to the center port of the manifold gauge set. The center port line

will be used later for both the R-454B and nitrogen containers.

OUTDOOR

UNIT

TO VAPOR

SERVICE VALVE

TO LIQUID LINE

SERVICE VALVE

MICRON

GAUGE

VACUUM PUMP

1/4 SAE TEE WITH SWIVEL

COUPLER

500

MANIFOLD

GAUGE SET

R-454B

RECOMMEND MINIMUM 3/8” HOSE

HIGH

LOW

NITROGEN

EVACUATE THE SYSTEM

NOTE -

ister to deliver liquid

refrigerant.

Installation Instructions

31-5000951 Rev. 0 27

Evacuating Line Set and Indoor Coil (cont)

2. EVACUATE THE SYSTEM

A. Open both manifold valves and start the vacuum pump.

B. Evacuate the line set and indoor unit to an absolute pressure of 23,000 microns (29.01 inches of mercury).

NOTE — During the early stages of evacuation, it is desirable to close the manifold gauge valve at least once. A rapid

rise in pressure indicates a relatively large leak. If this occurs, repeat the leak testing procedure.

NOTE — The term absolute pressure means the total actual pressure within a given volume or system, above the

absolute zero of pressure. Absolute pressure in a vacuum is equal to atmospheric pressure minus vacuum pressure.

C. When the absolute pressure reaches 23,000 microns (29.01 inches of mercury), perform the following:

• Close manifold gauge valves

• Close valve on vacuum pump

• Turn off vacuum pump

• Disconnect manifold gauge center port hose from vacuum pump

• Attach manifold center port hose to a dry nitrogen cylinder with pressure regulator set to 150 psig (1034 kPa) and

purge the hose.

• Open manifold gauge valves to break the vacuum in the line set and indoor unit.

• Close manifold gauge valves.

D. Shut off the dry nitrogen cylinder and remove the manifold gauge hose from the cylinder. Open the manifold gauge

valves to release the dry nitrogen from the line set and indoor unit.

E. Reconnect the manifold gauge to the vacuum pump, turn the pump on, and continue to evacuate the line set and

indoor unit until the absolute pressure does not rise above 500 microns (29.9 inches of mercury) within a 20-minute

period after shutting off the vacuum pump and closing the manifold gauge valves.

F. When the absolute pressure requirement above has been met, disconnect the manifold hose from the vacuum pump

and connect it to an upright cylinder of R-454B refrigerant. Open the manifold gauge valve 1 to 2 psig in order to

release the vacuum in the line set and indoor unit.

G. Perform the following:

• Close manifold gauge valves.

• Shut off R-454B cylinder.

• Reinstall service valve cores by removing manifold hose from service valve. Quickly install cores

with core tool while maintaining a positive system pressure.

• Replace stem caps and secure finger tight, then tighten an additional one-sixth (1/6) of a turn as

illustrated.

Evacuating the system of non-condensables is critical for proper operation of the unit. Non-

condensables are defined as any gas that will not condense under temperatures and pressures present during

operation of an air conditioning system. Non-condensables and water suction combine with refrigerant to produce

substances that corrode copper piping and compressor parts.

WARNING

Possible equipment damage. Avoid deep vacuum operation. Do not use compressors to evacuate

a system. Extremely low vacuum can cause internal arcing and compressor failure. Damage caused by deep vacuum

operation will void warranty.

IMPORTANT

Use a thermocouple or thermistor electronic vacuum gauge that is calibrated in microns. Use an

instrument capable of accurately measuring down to 50 microns.

1/6 TURN

Installation Instructions

28 31-5000951 Rev. 0

Electrical

In the U.S.A., wiring must conform with current local codes

and the current National Electric Code (NEC). In Canada,

wiring must conform with current local codes and the

current Canadian Electrical Code (CEC).

Refer to the furnace or air handler installation instructions

for additional wiring application diagrams and refer to unit

nameplate for minimum circuit ampacity and maximum

overcurrent protection size.

24VAC TRANSFORMER

Use the transformer provided with the furnace or air

handler for low-voltage control power (24VAC - 40 VA

minimum).

SIZE CIRCUIT AND INSTALL SERVICE DISCONNECT

SWITCH

Refer to the unit nameplate for minimum circuit ampacity,

and maximum fuse or circuit breaker (HACR per NEC).

Install power wiring and properly sized disconnect switch.

SERVICE

DISCONNECT

SWITCH

MAIN FUSE BOX/

BREAKER PANEL

NOTE — Units are approved for use only with copper

conductors. Ground unit at disconnect switch or to an

earth ground.

WARNING

Electric Shock Hazard. Can cause injury

or death. Unit must be properly grounded in

accordance with national and local codes. Line

voltage is present at all components when unit

is not in operation on units with singlepole

contactors. Disconnect all remote electric

power supplies before opening access panel.

Unit may have multiple power supplies.

INSTALL THERMOSTAT

Install room thermostat (ordered separately) on an inside

wall approximately in the center of the conditioned area

and 5 feet (1.5m) from the floor. It should not be installed

on an outside wall or where it can be affected by sunlight

or drafts.

THERMOSTAT

5 FEET

(1.5M)

NOTE — 24VAC, Class II circuit connections are made in

the control panel.

Installation Instructions

31-5000951 Rev. 0 29

Electrical (cont)

Air Handler

Thermostat / Outdoor Unit Terminal Block (BLACK)

Indoor Unit Terminal Block (BLUE)

Class II Voltage Field Wiring

Single-Stage Heat Pump

Optional

N.C. Condensate

Float Switch

TSTAT

INDOOR

NO COM NCNO COM NC

ZONING ALARM

O/B

SENSOR #1

SW1

SW2

LED

RDS Sensor

Thermostat

RDS Blower Control Board - 24 Volt

Cat # (27A05)

Heat Pump with NAM-71 AHU with Factory Installed RDS Control Field Wiring Diagram

Installation Instructions

30 31-5000951 Rev. 0

Installation Instructions

System Operation

UNIT COMPONENTS

IMPORTANT

Some scroll compressors have an internal vacuum

protector that will unload scrolls when suction pressure

goes below 20 psig. A hissing sound will be heard when

the compressor is running unloaded. Protector will

reset when low pressure in system rises above 40 psig.

DO NOT REPLACE COMPRESSOR.

The outdoor unit and indoor blower cycle on demand from

the room thermostat. If the thermostat blower switch is in

the ON position, the indoor blower operates continuously.

Bi-Flow Liquid line Filter Drier

The unit is equipped with a large-capacity bi-flow filter drier

which keeps the system clean and dry. If replacement is

necessary, order another of the same design and capacity.

The replacement filter drier must be suitable for use with

R-454B refrigerant.

Low Pressure Switch (S87)

The NS16H is equipped with an auto-reset low pressure

switch which is located on the vapor line. The switch shuts

off the compressor when the vapor pressure falls below

the factory setting. This switch, which is ignored during

defrost operation, closes at pressures at or above 40 ± 5

psig (276 ± 34 kPa) and opens at 25 ± 5 psig (172 ± 34

kPa). It is not adjustable.

High Pressure Switch (S4)

The NS16H is equipped with an auto-reset high pressure

switch (single-pole, single-throw) which is located on the

liquid line. The switch shuts off the compressor when

discharge pressure rises above the factory setting. The

switch is normally closed and is permanently adjusted to

trip (open) at 590 ± 15 psig (4068 ± 103 kPa).

Crankcase Heater (HR1)

Certain units are equipped with a belly band type

crankcase heater. HR1 prevents liquid from accumulating

in the compressor. The HR1 is controlled by a thermostat

switch integrated into the heater. On all units, the heater

is on when there is no compressor operation. Thermostat

switch closes at 45°F and opens at 65°F.

Charging

Verify the unit is electrically grounded before charging

the system. Extreme care shall be taken not to overfill the

refrigerating system.

Charge should be checked and adjusted using information

outlined in this section and in the tables provided on the

charging label on the unit’s control access panel.

R454B is a zeotropic blend of two refrigerants. At any

given refrigerant pressure, R454B will have two saturation

temperatures, a saturated liquid temperature and a

saturated vapor temperature. See R454B Refrigerant

Pressure Temperature Chart in the installation and

service manual for saturation temperatures.

R454B Units must be charged with liquid refrigerant.

Follow conventional charging procedures when charging

the system. The technician is required to mark the total

charge of the installed system on the unit nameplate,

which includes the nameplate charge (factory charge) and

additional charge that is added to the system at the time

of installation.

7KH5%UHIULJHUDQWF\OLQGHUVDUHSURYLGHGZLWKDóފ/+

IODUHFRQQHFWLRQWKHUHIRUHDóފ/+IHPDOHIODUHDGDSWHU

will be required. Connect manifold gauges and hoses

following conventional charging procedures. Position the

R454B refrigerant cylinder to deliver liquid refrigerant.

NS16H unit is factory-charged with enough R454B

refrigerant to accommodate a 15-foot length of refrigerant

piping. For line lengths over 15 feet, add 3 oz of refrigerant

for every 5 feet of piping beyond 15 feet.

Initiate a call for cooling and allow the refrigerant pressures

and temperatures to stabilize. Adjust the charge to using

the subcooling method. The unit charging label provides

the target Subcooling Values. Record the liquid line

temperature. Measure the liquid line pressure and use

the value to determine the Saturated Liquid Temperature.

Calculate subcooling by subtracting the liquid line

temperature from the Saturated liquid temperature.

Subcooling = Saturated Liquid Temperature – Liquid

Line Temperature

Compare the results with the unit charging label.

Once system charging has been completed, the additional

charge and total charge must be marked on the unit

nameplate. See below.

Total Charge = Factory Charge + Additional charge.

The total charge is marked on the space adjacent to “Total

Charge”. See nameplate below.

Detailed information is given in the NS16H Installation

and Service Procedures manual, which is available on

GEAppliancesAirandWater.com.

31-5000951 Rev. 0 31

Installation Instructions

System Configuration

Demand Defrost Control (A108)

The demand defrost control measures differential temperatures to detect when the system is performing poorly

because of ice build-up on the outdoor coil. The control self-calibrates when the defrost system starts and after each

system defrost cycle. The demand defrost control components are shown below.

• Demand defrost control connections, jumpers and LED locations are shown below.

• Demand defrost control connections, jumpers and LED descriptions are listed in table on page 32.

• Demand defrost control status, fault and lockout LEDs are listed in table on page 35.

24V TERMINAL STRIP

CONNECTIONS

(P2)

DIAGNOSTIC LEDS

(DS1 AND DS2)

PRESSURE

SWITCH CIRCUIT

CONNECTIONS

TEST PINS (P1)

SENSOR CONNECTION

(COIL AND AMBIENT

SENSORS)

(P4)

REVERSING VALVE

(O OUT)

DELAY PINS

(P5)

NOMINAL DEFROST

SELECTION TIME

(P3)

DEFROST TERMINATION

PIN SETTINGS (P1)

Demand Defros

Control (A108)

32 31-5000951 Rev. 0

Installation Instructions

DEMAND DEFROST CONTROL (A108) INPUTS, OUTPUTS AND CONFIGURABLE SETTINGS

Control

Locations

Control Label or

Description

Purpose Function

P1 50, 70, 90, 100 Defrost Temperature

Termination Shunt (Jumper)

Pins

The demand defrost control (illustrated on Page 31) has selections

which are: 50, 70, 90, and 100°F (10, 21, 32 and 38°C). The shunt

termination pin is factory-set at 50°F (10°C). If the temperature shunt

is not installed, the default termination temperature is 90°F (32°C).

P2 W1 24VAC Thermostat Input /

Output

24VAC input / output from indoor thermostat to indoor unit.

C 24VAC Common 24VAC common.

L Thermostat Service Light Thermostat service light connection.

R 24VAC 24VAC.

T2 Thermostat Input Controls the second stage operation of the unit.

O Reversing valve solenoid.

Y1 Controls the operation of the unit.

P3 165, 140, 100, 60 Nominal defrost time

selection

The nominal defrost time selection input is provided by the position

of a selection shunt on the 0.100” P3 header. Options are 165, 140,

100 and 60 seconds. Default setting is 140 seconds.

P4 DIS-YEL Coil Sensor (P4-5) Ground connection for outdoor coil temperature sensor.

(P4-6) Connection for outdoor coil temperature sensor.

$0%%/$&. Ambient Sensor (P4-3) Ground connection for outdoor ambient temperature sensor.

(P4-4) Connection for outdoor ambient temperature sensor.

COIL-BROWN Discharge Sensor 1RGLVFKDUJHVHQVRULVXVHGUHSODFHGE\.UHVLVWRU

P5 DELAY Delay Mode The demand defrost control has a field-selectable function to

reduce occasional sounds that may occur while the unit is cycling

in and out of the defrost mode. When a jumper is installed on the

DELAY pins, the compressor will be cycled off for 30 seconds

going in and out of the defrost mode. Units are shipped with jumper

installed on DELAY pins.

NOTE - The 30-second off cycle is functional when TEST pins on

P1 are jumpered.

P6 TST, PS DF, C, R, O, Y1, Y2 Factory Test Connectors No field use.

DS1 RED LED Diagnostic LED Demand defrost control LEDs may be OFF, ON, or FLASHING to

indicate diagnostic conditions which are described in table 3.

DS2 GREEN LED

FAN TWO CONNECTORS Condenser Fan Operation These two connections provide power for the condenser fan.

O OUT O OUT 24 VAC output 24 VAC output connection for reversing valve.

LO-PS LO-PS Low-Pressure Switch When the low pressure switch trips, the demand defrost control

will cycle off the compressor, and the strike counter in the demand

defrost control will count one strike. The low pressure switch is

ignored under the following conditions:

• during the defrost cycle and 90 seconds after the termination of

defrost

• When ambient temperature is below 15°F, the Low pressure

switch is ignored for 10 minutes during compressor operation

before allowing the pressure switch to de-energize the

compressor.

• during 90 seconds following the start of the compressor

• during TEST mode.

Y2 OUT Y2 OUT 24 VAC Output 24 VAC output for second-stage compressor solenoid.

Y1 OUT Y1 OUT 24 VAC Common Output 24 VAC common output, switched for enabling compressor

contactor.

HS-PS HS-PS High-Pressure Switch When the high pressure switch trips, the demand defrost control

will cycle off the compressor, and the strike counter in the demand

defrost control will count one strike.

L L Service Light Output 24VAC service light output.

24V 24V 24 Volt Output 24VAC typically used to supply power to the System Operation

Monitor (LSOM). Not used in this system.

31-5000951 Rev. 0 33

Installation Instructions

Defrost System

This section addresses:

• Emergency Heat

• Defrost System Overview

• Defrost Control Connections, Jumper Settings and

Features

• Operational Mode Overview (Calibration, Normal and

Defrost)

• Defrost Cycle Actuation

EMERGENCY HEAT (AMBER LIGHT)

An emergency heat function is designed into some room

thermostats. This feature is applicable when isolation of

the outdoor unit is required, or when auxiliary electric

heat is staged by outdoor thermostats. When the room

thermostat is placed in the emergency heat position, the

outdoor unit control circuit is isolated from power and

field-provided relays bypass the outdoor thermostats. An

amber indicating light simultaneously comes on to remind

the homeowner that he is operating in the emergency heat

mode.

Emergency heat is usually used during an outdoor unit

shutdown, but it should also be used following a power

outage if power has been off for over an hour and the

outdoor temperature is below 50°F (10°C). System should

be left in the emergency heat mode at least six hours

to allow the crankcase heater sufficient time to prevent

compressor slugging.

DEFROST SYSTEM OVERVIEW

The control monitors ambient temperature, outdoor coil

temperature, and total run time to determine when a

defrost cycle is required. The coil temperature probe

is designed with a spring clip and is mounted between

the outlet of the TXV and the distributor. See coil sensor

location on Page 13, Figure 1 Typical Plumbing Location

arrangement drawing. The location of the coil sensor is

important for proper defrost operation.

NOTE – The demand defrost control accurately measures

the performance of the system as frost accumulates on the

outdoor coil. This typically will translate into longer running

time between defrost cycles as more frost accumulates on

the outdoor coil before the demand defrost control initiates

defrost cycles.

Demand Defrost Operation

The defrost control uses a time-dependent frost

accumulation duration demand defrost control algorithm

to provide a demand defrost when the system falls below

optimum levels. The demand defrost control algorithm

is reactive based upon the previous heat pump run time

between defrost cycles (frost accumulation time) and

the time spend in defrost (nominal defrost time). The

defrost control monitors ambient temperature, outdoor

coil temperature along with the compressor run time in

heating mode and defrost cycle time.

The outdoor unit control monitors compressor run time in

the heating mode when the outdoor coil temperature is

below 37°F and accumulates the frost accumulation time.

Once the frost accumulation time is met the unit control

will initiate a defrost cycle.

The unit will run in the defrost mode until the coil temperature

reaches the defrost termination temperature setpoint. The

maximum length of defrost cycle is 14 minutes and the

defrost cycle will automatically be terminated if the defrost

cycle exceeds 14 minutes.

Two consecutive low pressure switch trips while operating

in the heat pump heating mode will initiate a defrost cycle

to defrost that may occur during a weather related event

such as freezing rain.

Frost Accumulation Time

The frost accumulation time is the amount of time the

heat pump runs in the heating mode when the outdoor

coil temperature is below 37°F. The initial target frost

accumulation time is 90 minutes, but the control will

adjust the frost accumulation time higher or lower based

upon the previous defrost cycle time history. If the defrost

cycle time is short (70% or less of the defrost cycle time)

the defrost accumulation time will be increased by 30

minutes. If the defrost cycle time is long (130% or more

of the target defrost cycle time) the defrost accumulation

time will be decreased by 30 minutes. If the defrost

accumulation time is significantly longer (200% or more of

the target defrost cycle time) or if the defrost terminates at

the 14-minute maximum time, the frost accumulation time

is set to 30 minutes. No change is he frost accumulation

time is made if the frost accumulation time is close to the

target defrost cycle time (between 70% and 130% of the

target defrost cycle time).The defrost cycle time is counted

from the time the reversing valve is energized until the

defrost termination temperature reaches 50°F. The defrost

termination tempeature jumper setting does not affect the

defrost cycle time.

34 31-5000951 Rev. 0

Installation Instructions

Defrost System (cont)

Cold Climate Defrost

When the outdoor temperature is below 10°F, the frost

accumulation time is set to 360 minutes to reduce the

frequency of the defrost cycle to increase the system

efficiency. When the outdoor temperture is less the 10

degrees, there is less moisture in the air and defrost

frequency can be reduced. The defrost cycle resumes

normal operation when the outdoor temperature rises

above 15°F and the frost acumulation time is reset to 90

minutes.

NOTE – Colder climates may require a higher defrost

termination temperature setting to ensure the outdoor

coil is cleared of frost during defrost. If the outdoor coil

is not adequately cleared of frost, the heat pump may

experience reduced heating performance or damage to

the outdoor coil from the buildup of ice on the coil.

DEFROST CONTROL CONNECTIONS, JUMPERS

SETTINGS AND FEATURES

Defrost Temperature Termination Jumper Settings (P1)

The demand defrost control selections are: 50, 70, 90 and

100°F (10, 21, 32 and 38°C). The shunt termination pin

is factory set at 50°F (10°C). If temperature shunt is not

installed, default termination temperature is 90°F (32°C).

Test Pins (P1) Function

Placing the jumper on the field test pins (P1) allows the

technician to:

• Clear short cycle lockout

• Clear five-strike fault lockout

• Cycle the unit in and out of defrost mode

Place the unit in defrost mode to clear the coil

Nominal Defrost Time Selection Input (P3)

The nominal defrost time selection input is provided by the

position of a selection shunt on the 0.100” P3 header. If

the nominal defrost time shunt is not installed, the default

nominal defrost time shall be 140 seconds. The control

shall be provided from the factory with the shunt installed

in the 140 position. The nominal defrost time selection is

used as the value for the Nom_def_time variable.

Position Definitions for P3 Header:

• Connecting P3-1 and P3-2 will set the nominal defrost

time to 140 seconds.

• Connecting P3-2 and P3-3 will set the nominal defrost

time to 100 seconds.

• Connecting P3-3 and P3-4 will set the nominal defrost

time to 60 seconds.

• Connecting P3-4 and P3-5 will set the nominal defrost

time to 165 seconds.

Compressor Delay Mode (P5)

The demand defrost control has a field-selectable function

to reduce occasional sounds that may occur while the unit

is cycling in and out of the defrost mode. When a jumper is

installed on the DELAY pins, the compressor will be cycled

off for 30 seconds going in and out of the defrost mode.

Units are shipped with jumper installed on DELAY pins.

NOTE - The 30 second off cycle is NOT functional when

jumpering the TEST pins.

DEMAND DEFROST CONTROL (A108) DIAGNOSTIC

LEDS

The state (Off, On, Flashing) of two LEDs on the demand

defrost control (DS1 [Red] and DS2 [Green]) indicate

diagnostics conditions that are described in table 4.

31-5000951 Rev. 0 35

Installation Instructions

DEMAND DEFROST CONTROL (A108) DIAGNOSTIC LEDS

DS1 and DS2 System Status, Fault and Lockout Codes

DS2 Green DS1 Red Type Condition / Code Possible Cause(s) Solution

OFF OFF Status Power Problem

No power (24V) to demand defrost

control terminals R and C or

demand defrost control failure.

1. Check control transformer power

(24V).

2. If power is available to demand

defrost control and LED(s) do

not light, replace demand defrost

control.

Simultaneous SLOW Flash Status Normal operation

Unit operating normally or in

standby mode.

None required

Alternating SLOW Flash Status

5-minute anti-short

cycle delay

Initial power up, safety trip, end of

room thermostat demand.

None required (jumper TEST pins

to override)

Simultaneous FAST Flash Fault

Ambient Sensor

Problem

Sensor being detected open or shorted or out of temperature range.

Demand defrost control will revert to time/temperature defrost operation.

(System will still heat or cool).

Alternating FAST Flash Fault Coil Sensor Problem

Sensor being detected open or shorted or out of temperature range.

Demand defrost control will not perform demand or time/temperature

defrost operation. (System will still heat or cool.)

ON ON Fault

Demand Defrost

Control Failure

Indicates that demand defrost control has internal component failure.

Cycle 24VAC power to demand defrost control. If code does not clear,

replace demand defrost control.

OFF SLOW Flash Fault Low Pressure Fault

• Restricted air flow over indoor or

outdoor coil.

• Improper refrigerant charge in

system.

• Improper metering device

installed or incorrect operation of

metering device.

• Incorrect or improper sensor

location or connection to system.

• Remove any blockages or

restrictions from coils and/or fans.

Check indoor and outdoor fan

motor for proper current draws.

• Check system charge using

subcooling method.

• Check system operating

pressures and compare to

unit subcooling tables in this

instruction or located on unit

access panel.

• Make sure all pressure switches

and sensors have secure

connections to system to prevent

refrigerant leaks or errors in

pressure and temperature

measurements.

OFF ON Lockout Low Pressure Lockout

SLOW Flash OFF Fault High Pressure Fault

ON OFF Lockout High Pressure Lockout

SLOW Flash ON Fault

Discharge Line

Temperature Fault

7KH16+KDVD.UHVLVWRULQVWDOOHGRQWKHGLVFKDUJHVHQVRU

connections. The high discharge temperature code should not occur.

If this code occurs, check for a shorted resistor on discharge sensor

connection.

During compressor operation, the demand defrost control will de-energize

the compressor contactor output (and the defrost output if active).

FAST Flash ON Lockout

Discharge Line

Temperature Lockout

OFF FAST Flash Fault

Discharge Sensor

Fault

7KH16+KDVD.UHVLVWRULQVWDOOHGRQWKHGLVFKDUJHVHQVRU

connections. The discharge sensor fault is detected if the 10k resistor is

open resistor on the discharge sensor connections. If this code occurs

check for a open resistor on discharge sensor connection. If the sensor

resistance is not within range after 90 seconds, the demand defrost one

fault. After 5 faults, the demand defrost control will lock out.

FAST Flash OFF Lockout

Discharge Sensor

Lockout

(DFKIDXOWDGGVVWULNHWRWKDWFRGH¶VFRXQWHUVWULNHVSHUFRGH /2&.287

IMPORTANT

After testing has been completed, properly reposition test jumper across desired timing pins

36 31-5000951 Rev. 0

Installation Instructions

Maintenance

DEALER

WARNING

Electric Shock Hazard.

Can cause injury or death. Unit must be

properly grounded in accordance with

national and local codes.

Line voltage is present at all components

when unit is not in operation on units

with single-pole contactors. Disconnect

all remote electric power supplies before

opening access panel. Unit may have

multiple power supplies.

WARNING

Improper installation, adjustment,

alteration, service or maintenance can cause property

damage, personal injury or loss of life. Installation and

service must be performed by a licensed professional

HVAC installer or equivalent, service agency, or the gas

supplier.

NOTICE

• Failure to follow instructions will cause damage to the

unit.

• This unit is equipped with an aluminum coil. Aluminum

coils may be damaged by exposure to solutions with a

pH below 5 or above 9. The aluminum coil should be

cleaned using potable water at a moderate pressure

(less than 50psi). If the coil cannot be cleaned using

water alone, GE Appliances recommends use of a coil

cleaner with a pH in the range of 5 to 9. The coil must be

rinsed thoroughly after cleaning.

• In coastal areas, the coil should be cleaned with potable

water several times per year to avoid corrosive buildup

(salt).

Maintenance and service must be performed by a qualified

installer or service agency. At the beginning of each

cooling season, the system should be checked as follows:

Outdoor Unit

1. Clean and inspect outdoor coil (may be flushed with a

water hose). Ensure power is off before cleaning.

2. Outdoor unit fan motor is pre-lubricated and sealed. No

further lubrication is needed.

3. Visually inspect all connecting lines, joints and coils for

evidence of oil leaks.

4. Check all wiring for loose connections.

5. Check for correct voltage at unit (unit operating).

6. Check amp draw on outdoor fan motor.

Motor Nameplate:_________ Actual:__________.

7. Inspect drain holes in coil compartment base and clean

if necessary.

NOTE – If insufficient heating or cooling occurs, the

unit should be gauged and refrigerant charge should be

checked.

Outdoor Coil

It may be necessary to flush the outdoor coil more frequently

if it is exposed to substances which are corrosive or which

block airflow across the coil (e.g., pet urine, cottonwood

seeds, fertilizers, fluids that may contain high levels of

corrosive chemicals such as salts)

• Outdoor Coil – The outdoor coil may be flushed with a

water hose.

• Outdoor Coil (Sea Coast) – Moist air in ocean locations

can carry salt, which is corrosive to most metal. Units that

are located near the ocean require frequent inspections

and maintenance. These inspections will determine the

necessary need to wash the unit including the outdoor

coil. Consult your installing contractor for proper intervals/

procedures for your geographic area or service contract.

Indoor Unit

1. Clean or change filters.

2. GE Appliances blower motors are prelubricated and

permanently sealed. No more lubrication is needed.

3. Adjust blower speed for cooling. Measure the pressure

drop over the coil to determine the correct blower CFM.

Refer to the unit information service manual for pressure

drop tables and procedure.

4. Belt Drive Blowers - Check belt for wear and proper

tension.

5. Check all wiring for loose connections.

6. Check for correct voltage at unit. (blower operating)

7. Check amp draw on blower motor.

Motor Nameplate:_________ Actual:__________.

Indoor Coil

1 - Clean coil if necessary.

2 - Check connecting lines, joints and coil for evidence of

oil leaks.

3 - Check condensate line and clean if necessary.

HOMEOWNER

Cleaning of the outdoor unit’s coil should be performed

by a trained service technician. Contact your dealer and

set up a schedule (preferably twice a year, but at least

once a year) to inspect and service your outdoor unit.

The following maintenance may be performed by the

homeowner.

31-5000951 Rev. 0 37

Installation Instructions

Maintenance (cont)

IMPORTANT

Sprinklers and soaker hoses should not be installed where

they could cause prolonged exposure to the outdoor unit

by treated water. Prolonged exposure of the unit to treated

water (i.e., sprinkler systems, soakers, waste water, etc.)

will corrode the surface of the steel and aluminum parts,

diminish performance and affect longevity of the unit.

Outdoor Coil

The outdoor unit must be properly maintained to ensure

its proper operation.

• Please contact your dealer to schedule proper inspection

and maintenance for your equipment.

• Make sure no obstructions restrict airflow to the outdoor

unit.

• Grass clippings, leaves, or shrubs crowding the unit can

cause the unit to work harder and use more energy.

.HHS VKUXEEHU\ WULPPHG DZD\ IURP WKH XQLW DQG

periodically check for debris which collects around the

unit.

Routine Maintenance

In order to ensure peak performance, your system must be

properly maintained. Clogged filters and blocked airflow

prevent your unit from operating at its most efficient level.

1. Air Filter – Ask your GE Appliances dealer to show

you where your indoor unit’s filter is located. It will be

either at the indoor unit (installed internal or external

to the cabinet) or behind a return air grille in the wall or

ceiling. Check the filter monthly and clean or replace it

as needed.

2. Disposable Filter – Disposable filters should be

replaced with a filter of the same type and size.

NOTE – If you are unsure about the filter required

for your system, call your GE Appliances dealer for

assistance.

3. Reusable Filter – Many indoor units are equipped with

reusable foam filters. Clean foam filters with a mild

soap and water solution; rinse thoroughly; allow filter

to dry completely before returning it to the unit or grille.

NOTE – The filter and all access panels must be in

place any time the unit is in operation.

4. Electronic Air Cleaner – Some systems are equipped

with an electronic air cleaner, designed to remove

airborne particles from the air passing through the

cleaner. If your system is so equipped, ask your dealer

for maintenance instructions.

5. Indoor Unit – The indoor unit’s evaporator coil is

equipped with a drain pan to collect condensate formed

as your system removes humidity from the inside air.

Have your dealer show you the location of the drain

line and how to check for obstructions. (This would also

apply to an auxiliary drain, if installed.)

Thermostat Operation

See the thermostat homeowner manual for instructions on

how to operate your thermostat.

Heat Pump Operation

Your new GE Appliances heat pump has several

characteristics that you should be aware of:

• Heat pumps satisfy heating demand by delivering large

amounts of warm air into the living space. This is quite

different from gas- or oil-fired furnaces or an electric

furnace which deliver lower volumes of considerably

hotter air to heat the space.

• Do not be alarmed if you notice frost on the outdoor coil

in the winter months. Frost develops on the outdoor coil

during the heating cycle when temperatures are below

45°F (7°C). An electronic control activates a defrost

cycle lasting 5 to 15 minutes at preset intervals to clear

the outdoor coil of the frost.

• During the defrost cycle, you may notice steam rising

from the outdoor unit. This is a normal occurrence. The

thermostat may engage auxiliary heat during the defrost

cycle to satisfy a heating demand; however, the unit

will return to normal operation at the conclusion of the

defrost cycle.

Extended Power Outage

The heat pump is equipped with a compressor crankcase

heater which protects the compressor from refrigerant

slugging during cold weather operation.

If power to your unit has been interrupted for several

hours or more, set the room thermostat selector to the

EMERGENCY HEAT setting to obtain temporary heat

without the risk of serious damage to the heat pump.

In EMERGENCY HEAT mode, all heating demand is

satisfied by auxiliary heat; heat pump operation is locked

out. After a six-hour compressor crankcase warm-up

period, the thermostat can be switched to the HEAT setting

and normal heat pump operation may resume.

Preservice Check

If your system fails to operate, check the following before

calling for service:

• Verify room thermostat settings are correct.

• Verify that all electrical disconnect switches are ON.

• Check for any blown fuses or tripped circuit breakers.

• Verify unit access panels are in place.

• Verify air filter is clean.

• If service is needed, locate and write down the unit model

number and have it handy before calling.

Accessories

For update-to-date information, see any of the following

publications:

• GE Appliances NS16H Product Specification

38 31-5000951 Rev. 0

Installation Instructions

Wiring and Sequence of Operation - Typical Unit Wiring

Supersedes

GROUND

LUG

GREEN

RED

YELLOW

OUTDOOR

FAN

BLACK

DUAL

CAPACITOR

208-230/

60/

GROUND

COMPRESSOR

CONTACTOR

COMPRESSOR

K1-1

208-230/60/1

BLACK

YELLOW

RED

C12

KEY COMPONENT

DESCRIPTION

C12

HR1

K1,-1

S40

S87

S173

COMPRESSOR

MOTOR-OUTDOOR FAN

CAPACITOR-DUAL

HEATER-COMPRESSOR

CONTACTOR-COMPRESSOR

TERMOSTAT-CRANKCASE

SWITCH-LOW PRESS, COMP 1

SWITCH-THERMAL PROTECTION

FAN

CMC1

RED

BLK

HI-PS

O OUT

LO-PS

Y2-OUT

Y1-OUT

THERMOSTAT

FAN

HI-PS

O OUT

LO-PS

Y1-OUT

FAN

THERMOSTAT

REVERSING

VALVE

RED

BLACK

RED

CMC1

HR1

S41

SWITCH-DEFROST

THERMOSTAT-LOW AMBIENT

VALVE-REVERSING

CMC1

CONTROL-DEFROST

CMC1

HI-PS

S173

SWITCH-HIGH PRESSURE

S173

S87

SINGLE SPEED HP

S87

AMB

COIL

RT21

RT13

GROUND

AMB

COIL

RT21

RT13

DISCH

GRN

S41 TO BE MOUNTED IN CONTROL BOX AND WIRED

IN PARALLEL WITH LOW PRESSURE SWITCH

NOTE-FOR USE WITH COPPER CONDUCTORS ONLY.

REFER TO UNIT RATING PLATE FOR MINIMUM CIRCUIT

AMOACITY AND MAXIMUM OVERCURRENT PROTECTION SIZE

NOTE-IF ANY WIRE IN THIS APPLIANCE IS

REPLACED, IT MUST BE REPLACED WITH WIRE OF LIKE

SIZ, RATING,INSULATION THICKNESS AND TERMINATION

S173 SWITCH USED ONLY IN UNITS EQUIPPED

WITH COMPRESSORS WHICH DO NOT INCLUDE

INTERNAL SWITCH

CRANKCASE

HEATER

S40

LINE VOLTAGE FIELD INSTALLED

CLASS II VOLTAGE FIELD WIRING

DENOTES OPTIONAL COMPONENTS

S40

CRANKCASE

HEATER

31-5000951 Rev. 0 39

Installation Instructions

Wiring and Sequence of Operation - Typical Factory Wiring

DEFROST COIL

SENSOR

40 31-5000951 Rev. 0

Operating Sequence

This is the sequence of operation for NS16H series units.

The sequence is outlined by numbered steps which

correspond to circled numbers on the adjacent diagram.

The steps are identical for both cooling and first stage

heating demand with the exception reversing valve L1

is energized during cooling demand and de-energized

during heating demand.

NOTE – Transformer in indoor unit supplies power (24

VAC) to the thermostat and outdoor unit controls.

COOLING:

Internal thermostat wiring energizes terminal O by cooling

mode selection, energizing the reversing valve L1.

1. Demand initiates at Y1 in the thermostat.

9$&HQHUJL]HVFRPSUHVVRUFRQWDFWRU.

. 12 FORVHV HQHUJL]LQJ FRPSUHVVRU % DQG

outdoor fan motor (B4).

END OF COOLING DEMAND:

4. Demand is satisfied. Terminal Y1 is de-energized.

&RPSUHVVRUFRQWDFWRU.LVGHHQHUJL]HG

.RSHQVDQGFRPSUHVVRU%DQGRXWGRRUIDQPRWRU

(B4) are de-energized and stop immediately.

FIRST STAGE HEAT:

Internal thermostat wiring de-energizes terminal O by

heating mode selection, de-energizing the reversing valve

L1. See steps 1, 2 and 3.

End of FIRST STAGE HEAT:

See steps 4, 5 and 6.

DEFROST MODE:

When a defrost cycle is initiated, the control energizes

the reversing valve solenoid and turns off the condenser

fan. The control will also put 24VAC on the “W1” (auxiliary

heat) line. The unit will stay in this mode until either the

coil sensor temperature is above the selected termination

temperature, the defrost time of 14 minutes has been

completed, or the room thermostat demand cycle has been

satisfied. (If the temperature select shunt is not installed,

the default termination temperature will be 90°F.) If the

room thermostat demand cycle terminates the cycle, the

defrost cycle will be held until the next room thermostat

demand cycle. If the coil sensor temperature is still below

the selected termination temperature, the control will

continue the defrost cycle until the cycle is terminated in

one of the methods mentioned above.

Servicing Units Void of Charge

If the outdoor unit is void of refrigerant, clean the system

using the procedure described below.

1. Leak check system using procedure outlined on

page 25.

2. Evacuate the system using procedure outlined on

page 26.

3. Use nitrogen to break the vacuum and install a new

filter drier in the system.

4. Evacuate the system again using procedure outlined

on page 26.

5. Weigh in refrigerant.

Start-Up

IMPORTANT

If unit is equipped with a crankcase

heater, it should be energized 24 hours before unit start-

up to prevent compressor damage as a result of slugging.

1. Rotate fan to check for binding.

2. Inspect all factory and field-installed wiring for loose

connections.

3. After evacuation is complete, open the liquid line and

suction line service valves to release the refrigerant

charge (contained in outdoor unit) into the system.

4. Replace the stem caps and tighten as specified in

Operating Service Valves on page 15.

5. Check voltage supply at the disconnect switch. The

voltage must be within the range listed on the unit’s

nameplate. If not, do not start the equipment until you

have consulted with the power company and the voltage

condition has been corrected.

6. Set the thermostat for a cooling demand. Turn on power

to the indoor indoor unit and close the outdoor unit

disconnect switch to start the unit.

7. Check system for sufficient refrigerate by using

the procedures listed under Start-Up and Charging

Procedures.

8. Recheck voltage while the unit is running. Power must

be within range shown on the nameplate.

Installation Instructions

31-5000951 Rev. 0 41

Decommissioning

Before carrying out this procedure, it is essential that

the technician is completely familiar with the equipment

and all its detail. It is recommended good practice that all

refrigerants are recovered safely.

Prior to the task being carried out, an oil and refrigerant

sample shall be taken in case analysis is required prior to

re-use of recovered refrigerant. It is essential that electrical

power is available before starting decommissioning.

a) Become familiar with the equipment and its operation.

b) Isolate system electrically.

c) Before attempting the procedure, ensure that:

• mechanical handling equipment is available, if required,

for handling refrigerant cylinders;

• all personal protective equipment is available and

being used correctly;

• the recovery process is supervised at all times by a

competent person;

• recovery equipment and cylinders conform to the

appropriate standards.

d) Pump down refrigerant system, if possible.

e) If a vacuum is not possible, make a manifold so that

refrigerant can be removed from various parts of the

system.

f) Make sure that cylinder is situated on the scales before

recovery takes place.

g) Start the recovery machine and operate in accordance

with 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 completed, make sure that the cylinders and

the equipment are removed from site promptly and all

isolation valves on the equipment are closed off.

k) Recovered refrigerant shall not be charged into another

REFRIGERATING SYSTEM unless it has been cleaned

and checked.

IMPORTANT

Equipment shall be labelled stating that

it has been decommissioned and emptied of refrigerant.

The label shall be signed and dated. Ensure that there are

labels on the equipment that state the flammability of the

refrigerant used.

Installation Instructions

42 31-5000951 Rev. 0

Installation Instructions

R-454B Refrigerant Pressure-Temperature Chart

Pressure

(psig)

Saturated

Liquid

Temp (°F)

Saturated

Vapor

Temp (°F)

Pressure

(psig)

Saturated

Liquid

Temp (°F)

Saturated

Vapor

Temp (°F)

Pressure

(psig)

Saturated

Liquid

Temp (°F)

Saturated

Vapor

Temp (°F)

Pressure

(psig)

Saturated

Liquid

Temp (°F)

Saturated

Vapor

Temp (°F)

0 -58.9 -57.1 158 58.9 61.3 272 93 95.4 362 113.4 115.6

25 -19.2 -17.2 160 59.6 62 274 93.5 95.9 364 113.8 116

30 -13.9 -11.8 165 61.4 63.8 276 94 96.4 366 114.2 116.4

35 -9.0 -6.9 170 63.1 65.5 278 94.5 96.9 368 114.6 116.8

40 -4.4 -2.3 175 64.9 67.3 280 95 97.4 370 115 117.2

45 -0.2 1.9 180 66.6 69 282 95.5 97.9 372 115.4 117.6

50 3.7 5.9 185 68.2 70.6 284 96 98.4 374 115.8 118

55 7.5 9.7 190 69.8 72.2 286 96.5 98.8 376 116.2 118.4

60 11 13.2 195 71.4 73.8

288 97 99.3 378 116.6 118.8

65 14.4 16.6 200 73 75.4 290 97.5 99.8 380 117 119.2

70 17.6 19.8 202 73.6 76 292 97.9 100.3 382 117.4 119.6

75 20.6 22.9 204 74.2 76.6 294 98.4 100.7 384 117.7 119.9

80 23.6 25.9 206 74.9 77.3 296 98.9 101.2 386 118.1 120.3

85 26.4 28.7 208 75.5 77.9 298 99.4 101.7 388 118.5 120.7

90 29.1 31.4 210 76.1 78.5 300 99.8 102.2 390 118.9 121.1

95 31.7 34 212 76.7 79.1 302 100.3 102.6 392 119.3 121.5

100 34.3 36.6 214 77.3 79.7 304 100.8 103.1 394 119.7 121.9

102 35.3 37.6 216 77.9 80.2 306 101.2 103.5 396 120.1 122.2

104 36.2 38.6 218 78.4 80.8 308 101.7 104 398 120.5 122.6

106 37.2 39.5 220 79 81.4 310 102.1

104.4 400 120.8 123

108 38.1 40.5 222 79.6 82 312 102.6 104.9 405 121.8 123.9

110 39.1 41.4 224 80.2 82.6 314 103 105.4 410 122.7 124.9

112 40 42.4 226 80.8 83.1 316 103.5 105.8 415 123.6 125.8

114 40.9 43.3 228 81.3 83.7 318 103.9 106.2 420 124.6 126.7

116 41.8 44.2 230 81.9 84.3 320 104.4 106.7 425 125.5 127.6

118 42.7 45.1 232 82.4 84.8 322 104.8 107.1 430 126.4 128.5

120 43.6 46 234 83 85.4 324 105.3 107.6 435 127.3 129.4

122 44.5 46.9 236 83.6 86 326 105.7 108 440 128.2 130.2

124 45.4 47.7 238 84.1 86.5 328 106.2 108.5 445 129 131.1

126 46.2 48.6 240 84.7 87.1 330 106.6 108.9 450 129.9 132

128 47.1 49.4 242 85.2 87.6 332 107 109.3 460

131.6 133.7

130 47.9 50.3 244 85.8 88.1 334 107.5 109.7 470 133.3 135.3

132 48.8 51.1 246 86.3 88.7 336 107.9 110.2 480 135 137

134 49.6 51.9 248 86.8 89.2 338 108.3 110.6 490 136.7 138.6

136 50.4 52.8 250 87.4 89.7 340 108.8 111 500 138.3 140.2

138 51.2 53.6 252 87.9 90.3 342 109.2 111.5 510 139.9 141.8

140 52 54.4 254 88.4 90.8 344 109.6 111.9 520 141.5 143.3

142 52.8 55.2 256 88.9 91.3 346 110 112.3 530 143 144.8

144 53.6 56 258 89.5 91.8 348 110.5 112.7 540 144.5 146.3

146 54.3 56.7 260 90 92.4 350 110.9 113.1 550 146.1 147.8

148 55.1 57.5 262 90.5 92.9 352 111.3 113.5 560 147.5 149.2

150 55.9 58.3 264 91 93.4 354 111.7 114 570 149 150.7

152 56.6 59 266 91.5 93.9 356 112.1 114.4 580 150.5 152.1

154 57.4 59.8 268 92 94.4 358 112.5 114.8 590 151.9 153.5

156 58.1 60.5 270 92.5 94.9 360 112.9 115.2 600 153.3 154.8

Note

1. R-454B is a zeotropic blend and must be charged with liquid refrigerant only.

2. Saturated liquid temperature is used to calculate liquid subcooling.

3. Saturated vapor temperature is used to to calculate suction superheat.

4. See unit charging label for subcooling values and additional charging information.

31-5000951 Rev. 0 43

Notes

44 31-5000951 Rev. 0

Printed in the U.S.A.

All specifications and illustrations subject

to change without notice and without

incurring obligations.

Start-Up and Performance Checklist

Job Name Job no. Date

Job Location City State

Installer City State

Unit Model No. Serial No. Service Technician

Nameplate Voltage

Rated Load Ampacity Compressor Outdoor Fan

Maximum Fuse or Circuit Breaker

Electrical Connections Tight? Indoor Filter clean? Supply Voltage (Unit Off)

Indoor Blower RPM S.P. Drop Over Indoor (Dry) Outdoor Coil Entering Air Temp.

Discharge Pressure Suction Pressure Refrigerant Charge Checked?

Refrigerant Lines: Leak Checked? Properly Insulated? Outdoor Fan Checked?

Service Valves: Fully Opened? Caps Tight? Thermostat

Voltage With Compressor Operating Calibrated? Properly Set? Level?

GE - General Electric NS16H18SA5 1.5-Ton 16 SEER2 Single-Stage Heat Pump

Product's Documents

Service Manual

Specifications

GE - General Electric NS16H18SA5 Questions and Answers