Goodman AVPEC25B14 2 Ton Multi-Positional Variable Speed User Manual

AVPEC

AIR HANDLERS

INSTALLATION & OPERATING INSTRUCTIONS

5151 San Felipe, Suite 500, Houston, TX 77056

www.goodmanmfg.com - or - www.amana-hac.com

P/N: IOA-4018D Date: December 2018

1 Important Safety Instructions --------------------------------------------------------- 2

2 Shipping Inspection ---------------------------------------------------------------------- 3

2.1 Parts ----------------------------------------------------------------------------------------- 3

2.2 Handling ------------------------------------------------------------------------------------ 3

3 Codes & Regulations -------------------------------------------------------------------- 3

4 Replacement Parts ----------------------------------------------------------------------- 3

5 Pre-Installation Considerations ------------------------------------------------------ 3

5.1 Preparation --------------------------------------------------------------------------------- 3

5.2 System Matches --------------------------------------------------------------------------- 3

5.3 Interconnecting Tubing ------------------------------------------------------------------ 3

5.4 Clearances ---------------------------------------------------------------------------------- 3

5.5 Horizontal Applications ------------------------------------------------------------------ 4

6 Installation Location -------------------------------------------------------------------- 4

6.1 Upflow Installation ----------------------------------------------------------------------- 4

6.2 Horizontal Left Installation ------------------------------------------------------------- 4

6.3 Downflow/Horizontal Right Installation --------------------------------------------- 4

7 Refrigerant Lines -------------------------------------------------------------------------- 7

7.1 Tubing Size ---------------------------------------------------------------------------------- 7

7.2 Tubing Preparation ----------------------------------------------------------------------- 7

7.3 Tubing Connections ----------------------------------------------------------------------- 7

8 Condensate Drain Lines ----------------------------------------------------------------- 8

9 Ductwork ----------------------------------------------------------------------------------- 9

9.1 Return Ductwork -------------------------------------------------------------------------- 9

10 Return Air Filters ------------------------------------------------------------------------ 9

11 Electric Heat ------------------------------------------------------------------------------ 9

12 Electrical and Control Wiring -------------------------------------------------------- 11

12.1 Building Electrical Service Inspection ----------------------------------------------- 11

12.2 Wire Sizing ------------------------------------------------------------------------------- 11

12.3 Maximum Overcurrent Protection (MOP) ----------------------------------------- 11

12.4 Electrical Connections – Supply Voltage ------------------------------------------- 12

12.4.1 Air Handler Only (Non-Heat Kit Models) ---------------------------------------- 12

12.4.2 Air Handler - Non-Circuit Breaker Heat Kits ------------------------------------ 12

12.4.3 Air Handler With Circuit Breaker Heat Kit -------------------------------------- 12

13 Achieving 1.4% & 2% Low Leakage Rate ------------------------------------------ 12

14 Miscellaneous Start-Up Checklist -------------------------------------------------- 12

14.1 Auxiliary Alarm Switch ----------------------------------------------------------------- 14

14.2 Circulator Blower ------------------------------------------------------------------------ 14

14.3 AVPEC Motor Orientation ------------------------------------------------------------- 14

14.4 Accessory Contacts ---------------------------------------------------------------------- 14

15 Troubleshooting -------------------------------------------------------------------------- 15

15.1 Electrostatic Discharge (ESD) Precautions ---------------------------------------- 15

15.2 Diagnostic Chart ------------------------------------------------------------------------ 15

15.3 Fault Recall ------------------------------------------------------------------------------- 16

15.4 Dehumidification ------------------------------------------------------------------------ 16

16 ComfortNet™ System -------------------------------------------------------------------- 17

16.1 Overview ---------------------------------------------------------------------------------- 17

16.2 Airflow Consideration ------------------------------------------------------------------ 17

16.3 CTK04 Thermostat Wiring ------------------------------------------------------------- 19

16.3.1 Two-Wire Outdoor and Four-Wire Indoor Wiring. ---------------------------- 19

16.4 ComfortNet™ System Advanced Features ---------------------------------------- 19

16.5 Network Troubleshooting ------------------------------------------------------------- 19

16.6 System Troubleshooting --------------------------------------------------------------- 20

17 Directions to ComfortNet System Advanced Feature Menus ----------------- 20

17.2 Diagnostics ------------------------------------------------------------------------------- 20

17.3 Identification ---------------------------------------------------------------------------- 20

17.4 Set-Up -------------------------------------------------------------------------------------- 20

17.5 Status -------------------------------------------------------------------------------------- 21

Troubleshooting ------------------------------------------------------------------------------- 23

setting the mode display -------------------------------------------------------------------- 24

Diagnostic Codes ------------------------------------------------------------------------------ 25

SETTING THE MODE DISPLAY -------------------------------------------------------------- 27

NLY

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ATTENTION

INSTALLING PERSONNEL:

Prior to installation, thoroughly familiar-

ize yourself with this Installation Manual.

Observe all safety warnings. During instal-

lation or repair, caution is to be observed.

It is your responsibility to install the prod-

uct safely and to educate the customer

on its safe use.

1 IMPORTANT SAFETY INSTRUCTIONS

The following symbols and labels are used throughout this manual

to indicate immediate or potential safety hazards. It is the owner’s

and installer’s responsibility to read and comply with all safety

information and instructions accompanying these symbols. Fail-

ure to heed safety information increases the risk of personal in-

jury, property damage, and/or product damage.

NOTICE: THIS PRODUCT CONTAINS ELECTRONIC COMPONENTS WHICH REQUIRE A DEFINITE GROUND. PROVISIONS ARE MADE FOR

CONNECTION OF THE GROUND. A DEDICATED GROUND FROM THE MAIN POWER SUPPLY OR AN EARTH GROUND MUST BE PROVIDED

When installing or servicing this equipment, safety clothing, including

hand and eye protection, is strongly recommended. If installing in an

area that has special safety requirements (hard hats, etc.), observe

these requirements.

CAUTION

CO can cause serious illness including permanent brain

damage or death.

Advertencia especial para la instalación de calentadores ó manejadoras

de aire en áreas cerradas como estacionamientos ó cuartos de servicio.

El monóxido de carbono puede causar enfermedades severas

como daño cerebral permanente ó muerte.

Las emisiones de monóxido de carbono pueden circular a través

del aparato cuando se opera en cualquier modo.

RISQUE D'EMPOISONNEMENT AU

MONOXYDE DE CARBONE

Cette ventilation est nécessaire pour éviter le danger d'intoxication

au CO pouvant survenir si un appareil produisant du monoxyde

de carbone continue de fonctionner au sein de la zone confinée.

Failure to properly reconnect sensor wires may result in

Error codes and the unit not operating

To avoid property damage, personal injury or death due to electrical

shock, this unit MUST have an uninterrupted, unbroken electrical

ground. The electrical ground circuit may consist of an appropriately

sized electrical wire connecting the ground lug in the unit control box

to the building electrical service panel.

Other methods of grounding are permitted if performed in accordance

with the National Electric Code (NEC)/American National Standards

Institute (ANSI)/National Fire Protection Association (NFPA) 70 and

local/state codes. In Canada, electrical grounding is to be in accordance

with the Canadian Electric Code (CSA) C22.1.

To prevent the risk of property damage, personal injury, or death, do

not store combustible materials or use gasoline or other flammable

liquids or vapors in the vicinity of this unit.

This product is factory-shipped for use with 208/240/1/60 electrical

power supply. DO NOT reconfigure this air handler to operate with

any other power supply.

NOT

CONNECT

USE

ANY

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MANUFACTURER

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USE

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. S

ERIOUS

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WARNING

HIGH VOLTAGE!

Disconnect ALL power before servicing or installing this

unit. Multiple power sources may be present. Failure to do

so may cause property damage, personal injury or death.

RECOGNIZE THIS SYMBOL

AS A SAFETY PRECAUTION.

NOTICE

If an “Ed” error is encountered on

startup, verify that the electric

heater DIP switches have been set

to the appropriate heater size. See

Tables 8 and 9 for the heater kit

airflow delivery and DIP switch

settings.

2 SHIPPING INSPECTION

Always transport the unit upright; laying the unit on its side or

top during transit may cause equipment damage. The installer

should inspect the product upon receipt for shipping damage

and subsequent investigation is the responsibility of the car-

rier. The installer must verify the model number, specifications,

electrical characteristics, and accessories are correct prior to

installation. The distributor or manufacturer will not accept

claims from dealers for transportation damage or installation

of incorrectly shipped units.

2.1 Parts

Also inspect the unit to verify all required components are

present and intact. Report any missing components im-

mediately to Daikin or to the distributor. Use only factory

authorized replacement parts (see Section 4). Make sure

to include the full product model number and serial num-

ber when reporting and/or obtaining service parts.

2.2 Handling

Use caution when transporting/carrying the unit. Do not

move unit using shipping straps. Do not carry unit with

hooks or sharp objects. The preferred method of carrying

the unit after arrival at the job site is to carry via a two-

wheel hand truck from the back or sides or via hand by

carrying at the cabinet corners.

3 CODES & REGULATIONS

This product is designed and manufactured to comply with ap-

plicable national codes. Installation in accordance with such

codes and/or prevailing local codes/regulations is the responsi-

bility of the installer. The manufacturer assumes no responsi-

bility for equipment installed in violation of any codes or regu-

lations.

The United States Environmental Protection Agency (EPA) has

issued various regulations regarding the introduction and dis-

posal of refrigerants. Failure to follow these regulations may

harm the environment and can lead to the imposition of sub-

stantial fines. Should you have any questions please contact

the local office of the EPA and/or refer to EPA’s website

www.epa.gov.

4 REPLACEMENT PARTS

When reporting shortages or damages, or ordering repair parts,

give the complete product model and serial numbers as stamped

on the product. Replacement parts for this product are avail-

able through your contractor or local distributor. For the loca-

tion of your nearest distributor consult the white business pages,

the yellow page section of the local telephone book or contact:

HOMEOWNER SUPPORT

GOODMAN MANUFACTURING COMPANY, L.P.

19001 KERMIER ROAD

WALLER, TEXAS 77484

855-770-5678

5 PRE-INSTALLATION CONSIDERATIONS

5.1 Preparation

Keep this document with the unit. Carefully read all instruc-

tions for the installation prior to installing product. Make sure

each step or procedure is understood and any special con-

siderations are taken into account before starting installa-

tion. Assemble all tools, hardware and supplies needed to

complete the installation. Some items may need to be pur-

chased locally. Make sure everything needed to install the

product is on hand before starting.

5.2 System Matches

The entire system (combination of indoor and outdoor sec-

tions) must be manufacturer approved and Air-Conditioning,

Heating, and Refrigeration Institute (AHRI) listed. NOTE: In-

stallation of unmatched systems is not permitted. Damage

or repairs due to installation of unmatched systems is not

covered under the warranty.

5.3 Interconnecting Tubing

Give special consideration to minimize the length of refriger-

ant tubing when installing air handlers. Refer to outdoor AIR

CONDITIONING OR HEAT PUMP INSTALLATION & SERVICE

REFERENCE for line set configuration guidelines. If possible,

allow adequate length of tubing such that the coil may be

removed (for inspection or cleaning services) from the cabi-

net without disconnecting the tubing.

5.4 Clearances

The unit clearance from a combustible surface may be 0".

However, service clearance must take precedence. A mini-

mum of 24" in front of the unit for service clearance is re-

quired. Additional clearance on one side or top will be re-

quired for electrical wiring connections. Consult all appropri-

ate regulatory codes prior to determining final clearances.

When installing this unit in an area that may become wet

(such as crawl spaces), elevate the unit with a sturdy, non-

porous material. In installations that may lead to physical

damage (i.e. a garage) it is advised to install a protective bar-

rier to prevent such damage. Always install units such that a

positive slope in condensate line (1/4" per foot) is allowed.

DRIP SHIELD REMOVAL

Figure 1

Screw

Extension

Horizontal

Drip Shield

Side Drain Pan

Drip Shield

Bracket

Bottom

Drain Pan

5.5 Horizontal Applications

If installed above a finished living space a secondary drain pan,

as required by many building codes, must be installed under

the entire unit and its condensate drain line must be routed

to a location such that the user will see the condensate dis-

charge.

6 INSTALLATION LOCATION

NOTE: These air handlers are designed for indoor installation only.

The AVPEC product line may be installed in one of the upflow,

downflow, horizontal left or horizontal right orientations as shown

in Figures 3, 4, 5 and 6. The unit may be installed in upflow or

horizontal left orientation as shipped (refer to specific sections

for more information).

Minor field modifications are necessary to convert to downflow

or horizontal right as indicated in below sections.

6.1 Upflow Installation

No field modifications are mandatory however to obtain maxi-

mum efficiency, the horizontal drip shield, side drain pan and

drain pan extension, can be removed.

Side Drain Pan and Extension Removal: Refer to Figure 1,

remove the two (2) screws that secure the drip shield sup-

port brackets to the condensate collectors (front and back).

Unsnap the side drain pan from the bottom drain pan using a

screw driver or any small lever. The side drain pan, drip shield

brackets and the drain pan extension may now be removed.

From Figure 1, drain port labeled (A) is the primary drain for

this application and condensate drain line must be attached

to this drain port. Drain port (a) is for the secondary drain line

(if used).

6.2 Horizontal Left Installation

No field modifications are permissible for this application.

Drain port labeled (B) in Figure 1 is the primary drain for this

application and condensate drain line must be attached to

this drain port. Drain port (b) is for the secondary drain line

(if used).

In applications where the air handler is installed in the hori-

zontal left position (



), and the return air environment see

humidity levels above 65% relative humidity coupled with

total external static levels above 0.5” e.s.p., a condensate kit

is available for field application. Kit nomenclature can be

found in the table 1.

6.3 Downflow/Horizontal Right Installation

IMPORTANT NOTE: In the downflow application, to prevent

coil pan “sweating”, a downflow kit (DFK) is available through

your local Daikin distributor. The DFK is not supplied with the

air handler and is required to minimize pan sweating on all

downflow installations. See Table 2 for the correct DFK and

follow the instructions provided for installation.

Refer to Figure 7 and 8 for the location of the components

referenced in the following steps.

1. Before flipping the air handler, remove blower access panel

and coil access panel. The coil access panel and tubing panel

may remain screwed together during this procedure. Remove

and retain the seven (7) screws securing the coil access panel

to the cabinet and the six (6) screws securing the blower

access panel to the cabinet.

2. Before removing the coil remove the wire ties holding the

sensor wire harness to the center support. Remove the in-

sulation covering the wire connectors and disconnect the

wires. Do not cut or damage the insulation covering the junc-

tion connectors since it will be required to secure the wires

once the change is complete. See FigureS 2-1 and 2-2 for

wire tie location.

NOTE: DO NOT USE MANIFOLDS OR FLOWRATOR TO PULL

THE COIL ASSEMBLY OUT. FAILURE TO DO SO MAY RESULT

IN BRAZE JOINT DAMAGE AND LEAKS.

CMK0008

Condensate

CMK0009

Condensate

CMK0010

Condensate

CMK0011

Condensate

AVPEC25B14 AVPEC37C14 AVPEC59D14 AVPEC61D14

Table 1

CONDENSATE KIT

DFK-B

Downflow Kit

DFK-C

Downflow Kit

DFK-D

Downflow Kit

AVPEC25B14 AVPEC37C14

AVPEC59D14

AVPEC61D14

DOWNFLOW KIT

Table 2

3. Slide the coil assembly out using the bottom drain pan to

pull the assembly from the cabinet.

4. For flipping the coil, drain pan extension must be removed

for all models except AVPEC61D14. Center support should

not be removed while removing the drain pan extension.

Side drain pan and horizontal drip shield can be removed for

downflow application. The side drain pan and horizontal drip

shield cannot be removed for horizontal right.

Figure 2-1

WIRE TIE LOCATION TO BE SECURED

Figure 2-2

WIRE TIE LOCATION TO BE REMOVED

.59

(15 mm )

1.57

(40 mm )

2.36

(60 mm)

.59

15 mm )

Wire tie

Screw

Detail D

Detail C

Center

Support

Corner

Post

*Do not get the

trap to touch

the coil tubing

Bundle excess

wire and secure

it to the corner

post using screw mount

wire ties

(3) Secure the insulated connectors to

the corner using two screws and the

mounting wire ties provided.

(2) Connect the junction connectors

and slide the insulation over it.

Secure the insulation on the

junction using two wire ties.

(1) Insert the junction-

connectors into th

insulatio

Junction wires

Insulation

Sensor wires

Screw

mount

wire tie

Screw

mount

wire tie

Screw

mount

wire tie

(Front view)

(Side view)

Screw

(Front view)

(Side view)

5. Using the bottom drain pan to hold the coil assembly, slide

the coil assembly back into the cabinet on the downflow

brackets as shown in Figure 9.

NOTE: If removing only the coil access panel from the unit, the

filter access panel must be removed first. Failure to do so may

result in panel damage.

UPFLOW

Figure 3

DOWNFLOW

Figure 4

HORIZONTAL LEFT

Figure 5

HORIZONTAL RIGHT

Figure 6

Upper Tie Plate

Control

Deck

Downflow

Bracket

Center

Support

Filter

Bracket

Filter

Access

Panel

Blower

Access

Panel

Coil

Access

Panel

Tubing

Panel

Knockout

INTERNAL PART TERMINOLOGY

Figure 7

EXTERNAL PART TERMINOLOGY

Figure 8

6. Reconnect the sensor wires and replace the insulation se-

curing it with wire ties on both sides as shown in Figure 2-2.

Then, secure the wire harness to the corner post using the

screw mount wire ties provided.

7. Re-install the access panels removed in Step 1 as shown in

Figure 10.

8. Two drain ports located at the bottom drain pan (horizon-

tally oriented) are to be used for upflow and downflow ap-

plications and the two on the side drain pan (vertically ori-

ented) are to be used when the unit is in horizontal right or

left configuration. When the unit is in upflow or downflow

configuration, the drain ports located on bottom drain pan

must be plugged and vice versa. Drain ports located at lower

elevation (closer to the ground) in either configuration must

be connected to the main drain line and the higher is for the

secondary drain line.

7 REFRIGERANT LINES

NOTE: Care should be taken to route refrigerant tubing in a way

which allows adequate access for servicing and maintenance of

the air handling unit.

This product is factory-shipped with R410A and dry

nitrogen mixture gas under pressure. Use appropriate

service tools and follow these instructions to prevent

injury.

Do not install the air handler in a location that violates the instruc-

tions provided with the condenser. If the unit is located in an un-

conditioned area with high ambient temperature and/or high hu-

midity, the air handler may be subject to nuisance sweating of the

casing. On these installations, a wrap of 2" fiberglass insulation

with a vapor barrier is recommended.

7.1 Tubing Size

For the correct tubing size, refer to the outdoor AIR CONDI-

TIONING OR HEAT PUMP INSTALLATION & SERVICE REFER-

ENCE.

7.2 Tubing Preparation

A quenching cloth is strongly recommended to prevent

scorching or marring of the equipment finish when

brazing close to the painted surfaces. Use brazing

alloy of 5% minimum silver content.

Applying too much heat to any tube can melt the tube. Torch

heat required to braze tubes of various sizes must be

proportional to the size of the tube. Service personnel must

use the appropriate heat level for the size of the tube being

brazed.

CAUTION

Figure 9

COIL INSTALLATION FOR DOWNFLOW

IMPORTANT NOTE:

Ensure coil slides on the rails along the groove provided

on the drain pan side walls. Failure to do so will result in

improper condensate drainage.

Co i l s l i d e s o n

the downflow bracket

All cut ends are to be round, burr free, and clean. Failure to

follow this practice increases the chances for refrigerant leaks.

The suction line is spun closed and requires tubing cutters to

remove the closed end.

NOTE: To prevent possible damage to the tubing joints, do

not handle coil assembly with manifold or flowrator tubes.

Always use clean gloves when handling coil assemblies.

NOTE: The use of a heat shield is strongly recommended

when brazing to avoid burning the serial plate or the finish

of the unit. Heat trap or wet rags must be used to protect

heat sensitive components such as service valves, electronic

expansion valve (EEV), thermistors and pressure sensors.

7.3 Tubing Connections

AVPEC models come with factory installed electronic expan-

sion valve (EEV) pre-installed on the vapor tube.

1 Remove refrigerant tubing panel or coil (lower) access

panel.

2. Remove access valve fitting cap and depress the valve

stem in access fitting to release pressure. No pressure

indicates possible leak.

3. Replace the refrigerant tubing panel.

4. Remove the spin closure on both the liquid and suction

tubes using a tubing cutter.

5. Insert liquid line set into liquid tube expansion and slide

grommet about 18" away from braze joint.

6. Insert suction line set into suction tube expansion and

slide insulation and grommet about 18" away from braze

joint.

7. Braze joints. Quench all brazed joints with water or a

wet rag upon completion of brazing.

8. Replace access panels, suction line grommet, insulation

and all screws.

NOTE: The use of a heat shield is strongly recommended when

brazing to avoid burning the serial plate or the finish of the unit.

Heat trap or wet rags must be used to protect heat sensitive com-

ponents such as service valves, electronic expansion valve (EEV),

thermistors and pressure sensors.

8 CONDENSATE DRAIN LINES

The coil drain pan has a primary and a secondary drain with 3/4"

NPT female connections. The connectors required are 3/4" NPT

male, either PVC or metal pipe, and should be hand tightened to a

torque of no more than 37 in-lbs. to prevent damage to the drain

pan connection. An insertion depth of approximately 3/8” to 1/2”

(3-5 turns) should be expected at this torque.

1. Ensure drain pan hole is not obstructed.

2. To prevent potential sweating and dripping on to finished

space, it may be necessary to insulate the condensate drain

line located inside the building. Use Armaflex

or similar ma-

terial.

A secondary condensate drain connection has been provided for

areas where the building codes require it. Pitch all drain lines a

minimum of 1/4" per foot to provide free drainage. Provide re-

quired support to the drain line to prevent bowing. If the second-

ary drain line is required, run the line separately from the primary

drain and end it where condensate discharge can be easily seen.

NOTE: Water coming from secondary line means the coil primary

drain is plugged and needs immediate attention.

Insulate drain lines located inside the building or above a finished

living space to prevent sweating. Install a condensate trap to en-

sure proper drainage.

NOTE: When units are installed above ceilings, or in other loca-

tions where damage from condensate overflow may occur, it is

MANDATORY to install a field fabricated auxiliary drain pan un-

der the coil cabinet enclosure.

The installation must include a “P” style trap that is located as

close as is practical to the evaporator coil. See Figure 12 for de-

tails of a typical condensate line “P” trap.

NOTE: Units operating in high static pressure applications may

require a deeper field constructed “P” style trap than is shown in

Figure 12 to allow proper drainage and prevent condensate

overflow.

NOTE: Trapped lines are required by many local codes. In the

absence of any prevailing local codes, please refer to the require-

ments listed in the Uniform Mechanical Building Code.

RUBBER

GROMMET

SUCTION LINE

WITH SPIN CLOSURE

SUCTION LINE GROMMET

Figure 11

ACCESS PANEL

CONFIGURATION FOR

DOWNFLOW

OR HORIZONTAL RIGHT

Figure 10

A drain trap in a draw-through application prevents air from

being drawn back through the drain line during fan operation

thus preventing condensate from draining, and if connected to a

sewer line to prevent sewer gases from being drawn into the air-

stream during blower operation.

Use of a condensate removal pump is permitted when necessary.

This condensate pump should have provisions for shutting off

the control voltage should a blocked drain occur. See Auxiliary

Alarm Switch section for more details. A trap must be installed

between the unit and the condensate pump.

IMPORTANT NOTE: The evaporator coil is fabricated with oils

that may dissolve styrofoam and certain types of plastics.

Therefore, a removal pump or float switch must not contain any

of these materials.

9 DUCTWORK

CAUTION

If secondary drain is not installed, the secondary

access must be plugged.

This air handler is designed for a complete supply and return

ductwork system.

To ensure correct system performance, the ductwork is to be sized

to accommodate 350-450 CFM per ton of cooling with the static

pressure not to exceed 0.5" in w.c. Refer to ACCA Manual D,

Manual S and Manual RS for information on duct sizing and appli-

cation. Flame retardant ductwork is to be used and sealed to the

unit in a manner that will prevent leakage.

NOTE: A downflow application with electric heat must have an L-

shaped sheet metal supply duct without any outlets or registers

located directly below the heater.

9.1 Return Ductwork

DO NOT LOCATE THE RETURN DUCTWORK IN AN AREA THAT

CAN INTRODUCE TOXIC, OR OBJECTIONABLE FUMES/ODORS

INTO THE DUCTWORK. The return ductwork is to be con-

nected to the air handler bottom (upflow configuration).

10 RETURN AIR FILTERS

Do not operate this product without all the ductwork

attached.

Each installation must include a return air filter. This filtering may

be performed at the air handler using the factory filter rails or

externally such as a return air filter grille. When using the factory

filter rails, a nominal 16x20x1”, 20x20x1” or 24x20x1” (actual di-

mension must be less than 23-½”x20”) filter can be installed on a

B, C and D cabinet respectively (the cabinet size is the seventh

letter of the model number). Washable versions are available

through your local Daikin distributor.

11 ELECTRIC HEAT

Refer to the installation manual provided with the electric heat kit

for the correct installation procedure. All electric heat must be

field installed. If installing this option, the ONLY heat kits that are

permitted to be used are the Daikin produced HKS series. Refer to

the air handler unit’s Serial and Rating plate or the HKS specifica-

tion sheets to determine the heat kits compatible with a given air

handler. No other accessory heat kit besides the HKS series may

be installed in these air handlers.

Air Handler

3" MIN.

POSITIVE LIQUID

SEAL REQUIRED

AT TRAP

Drain

Connection

2" MIN.

Figure 12

NOTE: TRANSFORMER SUB-ASSEMBLY

Before installing the Heat Kit, uninstall the transformer sub-assem-

bly (Figure 21). Make sure to unplug 12-Pin connector before

uninstalling the uninstalling the transformer sub-assembly. Follow

the Heat Kit Installation Manual to install the Heat Kit. Install trans-

former sub-assembly back to the unit (Figure 21). Plug in 12-Pin

connectors and secure screws while installing transformer sub-as-

sembly back to the unit after heater kit installation.

Transformer

Sub-Assembly

Figure 21

The heating mode temperature rise is dependent upon the system

airflow, the supply voltage, and the heat kit size (kW) selected.

Use data provided in Tables 3,4 and 5 to determine the tempera-

ture rise (°F).

NOTE: For emergency heat, set the dipswitch on PCB. For heating

mode, use the thermostast user menu.

For installations not indicated above the following formula is to

be used:

TR = (kW x 3412) x (Voltage Correction) / (1.08 x CFM)

Where: TR = Temperature Rise

kW = Heater Kit Actual kW

3412 = Btu per kW

VC* = .96 (230 Supply Volts)

= .92 (220 Supply Volts)

= .87 (208 Supply Volts)

1.08 = Constant

CFM = Measured Airflow

*VC (Voltage Correction)

NOTE: The Temperature Rise Tables can also be used to estimate

the air handler airflow delivery. When using these tables for this

purpose set the room thermostat to maximum heat and allow the

system to reach steady state conditions. Insert two thermometers,

one in the return air and one in the supply air. The temperature

rise is the supply air temperature minus the return air temperature.

Using the temperature rise calculated, CFM can be estimated from

the TR formula above. See Specification Sheet and/or Service

Manual for more information.

AVPEC25B14 550 650 700 715 875

AVPEC37C14 850 900 1000 1120 1220 1250

AVPEC59D14 990 1110 1200 1240 1520 1520

AVPEC61D14 1030 1150 1250 1320 1650 1690 1715

Table 6

15 19 20 25

HEATER (kW)

MINIMUM CFM REQUIRED FOR HEATER KITS

Model

356810

3568101519/2025

800 12 19 23 31 37

1000 9 15 19 25 30 44

12008 12152125374962

14007 11131821324253

1600 6 9 12 15 19 28 37 46

1800 5 8 10 14 16 25 33 41

2000 5 7 9 12 15 22 30 31

HEAT KIT NOMINAL Kw

CFM

230/1/60 SUPPLY VOLTAGE - TEMP. RISE °F

Table 3

3 5 6 8 10 15 19/20 25

8001118223035

1000 9 14 18 24 28 42

12007 12152024354759

14006 10131720304051

1600 6 9 11 15 18 27 35 44

1800 5 8 10 13 16 24 31 39

20004 7 9 1214212835

230/1/60 SUPPLY VOLTAGE - TEMP. RISE °F

Table

CFM

HEAT KIT NOMINAL Kw

3 5 6 8 10 15 19/20 25

8001017212833

1000 8 13 17 22 27 40

12007 11141922334556

14006 10121619293848

1600 5 8 10 14 17 25 33 42

18005 7 9 1215223037

20004 7 8 1113202733

CFM

HEAT KIT NOMINAL Kw

230/1/60 SUPPLY VOLTAGE - TEMP. RISE °F

Table 5

HEAT KIT SELECTION

For heat kit selection, see the Specification Sheet for each

specific Air Handler.

12 ELECTRICAL AND CONTROL WIRING

IMPORTANT: All routing of electrical wiring must be made through

provided electrical knockouts. When removing the electircal

knockouts, take care not to damage the PCB. Do not cut, punc-

ture or alter the cabinet for electrical wiring.

FIRE HAZARD!

To avoid the risk of property damage, personal injury

or fire, use only copper conductors.

HIGH VOLTAGE!

Failure to do so may cause property damage,

personal injury or death.

Disconnect ALL power before servicing.

Multiple power sources may be present.

HIGH VOLTAGE!

To avoid property damage, personal injury or death

due to electrical shock, this unit MUST have an

electrical ground. The

electrical ground circuit may consist of an

appropriately sized electrical wire connecting the

ground lug in the unit control box to the building

electrical service panel.

Other methods of grounding are permitted if performed

in accordance with the National Electric Code

(NEC)/American National Standards Institute

(ANSI)/National Fire Protection Association (NFPA) 70

and local/state codes. In Canada, electrical grounding

is to be in accordance with the Canadian Electric Code

(CSA) C22.1.

uninterrupted, unbroken

12.1 Building Electrical Service Inspection

This unit is designed for single-phase electrical supply only.

DO NOT OPERATE AIR HANDLER ON A THREE-PHASE POWER

SUPPLY. Measure the power supply to the unit. The supply

voltage must be measured and be in agreement with the unit

nameplate power requirements and within the range shown.

12.2 Wire Sizing

Wire size is important to the operation of your equipment.

Use the following check list when selecting the appropriate

wire size for your unit.

• Wire used must be sized to carry the Minimum Circuit Am-

pacity (MCA) listed on the equipment’s Rating Plate.

• Refer to the NEC (USA) or CSA (Canada) for wire sizing. The

unit MCA for the air handler and the optional electric heat

kit can be found on the unit Series and Rating Plate.

•Wire must be sized to allow no more than a 2% voltage

drop from the building breaker/fuse panel to the unit.

•Wires with different insulation temperature rating have vary-

ing ampacities - be sure to check the temperature rating

used.

Refer to the latest edition of the National Electric Code or in

Canada the Canadian Electric Code when determining the cor-

rect wire size.

12.3 Maximum Overcurrent Protection (MOP)

Every installation must include an NEC (USA) or CEC (Canada)

approved overcurrent protection device. Also, check with lo-

cal or state codes for any special regional requirements. Pro-

tection can be in the form of fusing or HACR style circuit break-

ers. The Series and Rating Plate provides the maximum

overcurrent device permissible.

NOTE: Fuses or circuit breakers are to be sized larger than the

equipment MCA but not to exceed the MOP.

208-240 197 253

Nominal

Input

Minimum

Voltage

Maximum

Voltage

ELECTRICAL VOLTAGE

Table 7

12.4 Electrical Connections – Supply Voltage

IMPORTANT NOTE: USE COPPER CONDUCTORS ONLY.

Knockouts are provided on the air handler top panel and

sides of the cabinet to allow for the entry of the supply volt-

age conductors, as shown in Figure 13. If the knockouts on

the cabinet sides are used for electrical conduit, an adapter

ring must be used in order to meet UL1995 safety require-

ments. An NEC or CEC approved strain relief is to be used at

this entry point. Some codes/municipalities require the sup-

ply wire to be enclosed in conduit. Consult your local codes.

12.4.1 Air Handler Only (Non-Heat Kit Models)

The power supply connects to the stripped black and red

wires contained in the air handler electrical compartment.

Attach the supply wires to the air handler conductors as

shown in the unit wiring diagram using appropriately sized

solderless connectors or other NEC or CEC approved means.

A ground lug is also provided in the electrical compartment.

The ground wire from the power supply must be connected

to this ground lug.

12.4.2 Air Handler - Non-Circuit Breaker Heat Kits

A terminal block is provided with the HKS kit to attach the

power supply and air handler connections. Follow the HKS

Installation Manual and wiring diagram for complete wir-

ing details.

12.4.3 Air Handler With Circuit Breaker Heat Kit

The air handler has a soft plastic cover on the upper ac-

cess panel and can be removed to allow the heater kit

circuit breaker to be installed. The circuit breakers have

lugs for power supply connection. See the HKS Installation

Instructions for further details.

13 ACHIEVING 1.4% AND 2.0% AIRFLOW LOW LEAKAGE

RATE

Ensure all the gaskets remain intact on all surfaces as shipped

with the unit. These surfaces are areas between the upper tie

plate and coil access panel, blower access and coil access panels,

and between the coil access and filter access panels. Ensure upon

installation, that the plastic breaker cover is sitting flush on the

blower access panel and all access panels are flush with each other

and the cabinet. With these requirements satisfied, the unit

achieves less than 1.4% airflow leakage @ 0.5 inch wc static pres-

sure and less than 2% airflow leakage @1inch wc static pressure

when tested in accordance with ASHRAE Standard 193.

IMPORTANT: After installing the heater kits, it is very important

to seal the gap between the circuit breaker and the cover. Putty

paste or gasket can be used to seal the gap so that air leakage can

be minimized.

Side of

Cabinet

Top of

Cabinet

KNOCK-OUT FOR ELECTRICAL CONNECTIONS

Figure 13

14 MISCELLANEOUS START-UP CHECKLIST

• Prior to start-up, ensure that all electrical wires are prop-

erly sized and all connections are properly tightened.

• All panels must be in place and secured. For Air Tight appli-

cation, gasket must be positioned at prescribed locations

to achieve 2% leakage.

• Tubing must be leak free.

• Condensate line must be trapped and pitched to allow for

drainage.

• Auxiliary drain is installed when necessary and pitched to

allow for drainage.

• Low voltage wiring is properly connected.

• Unit is protected from vehicular or other physical damage.

• Return air is not obtained from, nor are there any return air

duct joints that are unsealed in, areas where there may be

objectionable odors, flammable vapors or products of com-

bustion such as carbon monoxide (CO), which may cause

serious personal injury or death.

IMPORTANT NOTE: If thumb screws are used to access the filter,

ensure the washer installed on the screw behind the access panel

remains in place after re-installation.

NOTE: A removable plug connector is provided with the control

to make thermostat wire connections. This plug may be removed,

wire connections made to the plug, and replaced. It is STRONGLY

recommended that you do not connect multiple wires into a single

terminal. Wire nuts are recommended to ensure one wire is used

for each terminal. Failure to do so may result in intermittent

operation.

. COMMUNICATING BOARD

Figure 14

TB5

SWITCH

ALARM

TB4

Figure 15

X3A

X15A

X5A

SEG2

SEG1

X12A

X13A

X8A

INDOOR UNIT PCB

THERMISTOR

Micro

Pr o ce sso r

PRESSURE SENSOR

EEV

COI L

FUSE

TB4

TB1

TB5

TB2

S1 S2 S 3 S4

Heater Kit

Outp ut

ECM Motor

OFF

DS1

DS2

DS3

SH A RE D A T A

S5 S6 S7 S8

S9 S1 0 S 1 1 S 1 2

S1 3 S14 S1 5 S16

S1 7 S1 8 S1 9 S 2 0

S2 1 S22

7seg

AUX AL A RM

ACC-OUT

ACC-IN

(Accessory)

(Accesso ry)

RX L ED

CPU LED

STA TUS LED

14.1 Auxiliary Alarm Switch

The control is equipped with two Auxiliary Alarm terminals,

labeled TB4 and TB5 which are typically utilized in series with

a condensate switch but could also be used with compatible

sensors or fire alarms.

The auxiliary alarm switch must be normally closed and open

when the alarm occurs. For example, a normally closed con-

densate switch will open when the base pan’s water level

reaches a particular level. The control will respond by turning

off the blower motor and outdoor unit and displaying the

proper fault codes. If the switch is later detected closed for

30 seconds, normal operation resumes and the error mes-

sage is removed. (The switch is closed as part of the default

factory setting.) The error will be maintained in the

equipment’s fault history. See Figures 14 and 15 for the con-

nection location.

14.2 Circulator Blower

This air handler is equipped with a variable speed circulator

blower. This blower provides several automatically-adjusted

blower speeds. The Specification Sheet applicable to your

model provides an airflow table, showing the relationship be-

tween airflow (CFM) and external static pressure (E.S.P.). For

heater kit installation, it is important to set the capacity of

the electric heater at two locations

Set-up menu

(“HT KIT(kW)”) of thermostat

Section 17.4 lists details for heater kit capacity selection. Con-

firm if the selection is correctly done from CONFIGURATION

menu (section 17.1) of the ComfortNet™ systems Advanced

feature Menus.

Indoor blower airflow (CFM) for a particular heater kit selec-

tion can be checked using the STATUS menu (section 17.5) or

from the 7-segment display on the control board. (See sec-

tion SETTING THE MODE DISPLAY).

NOTE: Upon start up in communicating mode the circuit board

may display an “Ed” error. This is an indication that the DIP

switches on the control board need to be configured in accor-

dance with the Electric Heating Airflow Table. Configuring the

DIP switches and resetting power to the unit will clear the

error code.

CAUTION

Do not change any other dip switches other than

S9 to S12. Incorrect settings may cause any error.

For default setting, see Figure 14.

14.3 AVPEC Motor Orientation

If the unit is in the upflow position, there is no need to rotate

the motor. If the unit is in the downflow position, loosen mo-

tor mount and rotate motor as shown in the AVPEC Motor

Orientation Figure 16. Be sure motor is oriented with the fe-

male connections on the casing down. If the motor is not

oriented with the connections down, water could collect in

the motor and may cause premature failure.

14.4 Accessory Contacts

The control is equipped with an Accessory Relay and a pair of

¼ inch accessory terminals which is normally open, labeled

ACC-IN and ACC-OUT (see accessory contacts graphic). The

Accessory Relay can be configured to close with humidifica-

tion functionality or to close anytime the blower is running. A

closed relay means the two terminals will have continuity be-

tween them (the control does not energize these contacts).

The set-up menu is where this configuration takes place.

(HUM) Humidifier

For the setup for humidification functionality, the

accessory terminals have 3 operational modes.

1. ON: Humidifier is only enabled during a call for heat.

During a heat call the accessory relay will close only

if there is an active call for humidification from the

thermostat. Otherwise, the relay will be open.

2. OFF: Humidifier remains off (relay never closes).

FEMALE CONNECTIONS

SIDE VIEW

RNING

SOFTW

RE VER.

TOP

FRONT VIEW

AVPEC MOTOR ORIENTATION

Figure 16

AVPEC25B14 AVPEC37C14 AVPEC59D14 AVPEC61D14

First Valid Heater Kit 3 5 5 5

Second Valid Heater Kit 5 6 6 6

Third Valid Heater Kit 6 8 8 8

Fourth Valid Heater Kit 8 10 10 10

Fifth Valid Heater Kit10151515

Sixth Valid Heater Kit X 19 20 20

Seventh Valid Heater Kit X X X 25

DIP Switch Setting

MODE

HEATER KIT OPTIONS

Table 8

NO Heater Kit OFF* OFF* OFF* OFF*

First Valid Heater KitONONONON

Second Valid Heater KitONONONOFF

Third Valid Heater Kit ON ON OFF ON

Fourth Valid Heater Kit ON ON OFF OFF

Fifth Valid Heater Kit ON OFF ON ON

Sixth Valid Heater Kit ON OFF ON OFF

Seventh Valid Heater Kit ON OFF OFF ON

Note: Default factory settings are marked with *

Switch 12

(S12)

Heater Kit

Selection

DIP SWITCH SETTING

Table 9

DIP SWITCH SETTING

Function Function

Switch 9

(S9)

Switch 10

(S10)

Switch 11

(S11)

3. IND: Humidifier will cycle with any active call for

humidification from the thermostat (independent of

a heat call). The relay will remain open during

cooling operation. This mode also allows the user to

select one of 4 fan speeds (25, 50, 75, and 100%).

The fan speed will be used when the system is in an

idol state and a call for humidification is made by

the thermostat.

NOTE: If “HUM” is selected in Accessary setting (ACC) menu, Hu-

midity Setting (HUM) will appear on set-up menu. If “IND” is then

selected under the HUM menu, Humidity Airflow (HUM FAN SPD

(%)) will appear on the set-up menu. Correct values must be set to

use humidifier. Default Factory setting of HUM is OFF.

(W/BLWR) With Blower

When the Accessory Relay is setup as With Blower, the

relay will be closed anytime the blower is running.

15 TROUBLESHOOTING

15.1 Electrostatic Discharge (ESD) Precautions

NOTE: Discharge body’s static electricity before touching unit.

An electrostatic discharge can adversely affect electrical

components.

Use the following precautions during air handler installation

and servicing to protect the integrated control module from

damage. By putting the air handler, the control, and the per-

son at the same electrostatic potential, these steps will help

avoid exposing the integrated control module to electrostatic

discharge. This procedure is applicable to both installed and

uninstalled (ungrounded) blowers.

1. Disconnect all power to the blower. Do not touch the inte-

grated control module or any wire connected to the con-

trol prior to discharging your body’s electrostatic charge

to ground.

2. Firmly touch a clean, unpainted, metal surface of the air

handler blower near the control. Any tools held in a

person’s hand during grounding will be discharged.

3. Service integrated control module or connecting wiring fol-

lowing the discharge process in step 2. Use caution not to

recharge your body with static electricity; (i.e., do not move

or shuffle your feet, do not touch ungrounded objects, etc.).

If you come in contact with an ungrounded object, repeat

step 2 before touching control or wires.

4. Discharge your body to ground before removing a new con-

trol from its container. Follow steps 1 through 3 if install-

ing the control on a blower. Return any old or new con-

trols to their containers before touching any ungrounded

object.

ACCESSORY CONTACTS

Figure 17

ACC-IN

(TB 6)

ACC-OUT

(TB 8)

Peripheral devices to be

linked (Example: Humidifier)

10A max: 250VAC

5A max: 30VDC

Faston Size: 250

7 Segment

Diagnostic

Displays

Fault

Recall

Figure 18

15.2 Diagnostic Chart

Refer to the Troubleshooting Chart at the end of this manual

for assistance in determining the source of unit operational

problems. The 7 segment LED display will provide any active

fault codes. An arrow printed next to the display indicates

proper orientation (arrow points to top of display). See fol-

lowing image.

15.3 Fault Recall

The integrated control module is equipped with a momentary

push-button switch that can be used to display the last six

faults on the 7 segment LED display. Follow the sequence to

use the feature. The control must be in Standby Mode (no

thermostat inputs).

1. Press FAULT RECALL button for 2 to 5 seconds

, so that

7 segment blinks “- -”.

2. Release FAULT RECALL button in this period, 7 seg-

ment display shows the most recent fault.

3. Each time FAULT RECALL button is pressed after that

, 7

segment display outputs next occurred fault.

4. After displaying the series of recent faults, 7 segment

displays blink “- -” and goes back to Standby Mode.

To clear the error code history:

1. Press FAULT RECALL button for 10 to 15 seconds

***

, so

that 7 segment displays blink “- -”.

2. Release FAULT RECALL button in this period, 7 segment

displays show “88” and faults are cleared.

NOTE:

* If FAULT RECALL button is not pressed long enough (for 2 to 5 seconds),

control goes back to Standby Mode.

If the FAULT RECALL button is pressed for 5 to 10 seconds, control goes back

to Standby Mode.

** Consecutively repeated faults are displayed a maximum of three times.

*** If FAULT RECALL button is help pressed for longer than 15 seconds, control

goes back to Standby Mode.

15.4 Dehumidification

The thermostat reads the indoor humidity level from the CTK04

and allows the user to set a dehumidification target based on these

settings. The thermostat controls the humidity level of the condi-

tioned space using the cooling system. Dehumidification is engaged

whenever a cooling demand is present and structural humidity lev-

els are above the target level. When this condition exists the circu-

lating fan output is reduced, increasing system run time, over cool-

ing the evaporator coil and ultimately removing more humidity from

the structure than if only in cooling mode. The CTK04 also allows

for an additional overcooling limit setting from 0 °F to 3 °F setup

through the Installer Option menu (direction below). This allows

the cooling system to further reduce humidity by lowering the tem-

perature up to 3° F below the cooling setpoint in an attempt to

better achieve desired humidity levels.

By default dehumidification needs to be turned ON at the thermo-

stat via the Dehumidification Equipment menu. Dehumidification

can be activated at the original equipment setup by selecting the

A/C with Low Speed Fan button in the Dehumidification Menu.

Availability can be verified by pressing MENU on the home screen.

Scroll down and if a Dehumidification button is present dehumidi-

fication is activated.

If Dehumidification is not available in the menu then it must be

enabled through the Installer Options menu. Use the following pro-

cedure to enable and disable dehumidification:

1. On the CTK04 HOME screen, select MENU.

2. From the MENU screen, scroll down and select Installer Op-

tions.

3. Enter installer password if known.

a. The password is the thermostat date code and can be ob-

tained by selecting the red Cancel button and selecting the

Dealer Information button.

b. Once recorded click the green OK button and return to the

previous step.

4. Select YES to continue.

5. Select View / Edit Current Setup.

6. Scroll down and select Dehumidification.

7. Once open select Dehumidification Equipment: None.

8. From the Dehumidification Menu select A/C with Low Speed

Fan and click the green Done button.

9. Additional Dehumidification operational options can be se-

lected in the resulting window.

10.Once satisfied with the selection navigate to the HOME

screen by selecting the Done button and selecting Yes to

verify the changes.

11.Select Previous Menu, then the HOME to return to the main

menu.

DEHUMIDIFICATION TIPS

For effective dehumidification operation:

• Ensure “Dehum” is ON through the Installer Options menu

and/or in the ComfortNet User Menu (COOL SETUP).

- If ON, the Dehumidification menu should be visible in

the main menu.

• Verify the cooling airflow profile is set to “Profile D”.

- See the Cool Set-up section of the Installation Manual

for com comlete airflow profile details.

- By default “Dehum” is ON and the cooling airflow pro-

file is set to “Profile D”.

• For additional dehumidification control, airflow settings are

field adjustable and can be fine-tuned to a value that is com-

fortable for the application from a range of +15% to -15%.

- See the Heat Pump Advanced Feature Menu section of

the Installation Manual for more detail.

16 COMFORTNET™ SYSTEM

16.1 Overview

The ComfortNet system is a system that includes a ComfortNet

compatible air handler and air conditioner or heat pump with

a CTK04 thermostat.

A ComfortNet heating/air conditioning system differs from a

non-communicating/traditional system in the manner in which

the indoor unit, outdoor unit and thermostat interact with

one another. In a traditional system, the thermostat sends

commands to the indoor and outdoor units via analog 24 VAC

signals. It is a one-way communication path. The indoor and

outdoor units typically do not return information to the ther-

mostat.

On the other hand, the indoor unit, outdoor unit, and ther-

mostat comprising a ComfortNet system “communicate” digi-

tally with one another. It is now a two-way communications

path. The thermostat still sends commands to the indoor and

outdoor units and may also request and receive information

from both the indoor and outdoor units. This information may

be displayed on the ComfortNet thermostat. The indoor and

outdoor units also interact with one another. The outdoor

unit may send commands to or request information from the

indoor unit. This two-way digital communications between

the thermostat and subsystems (indoor/outdoor unit) is the

key to unlocking the benefits and features of the ComfortNet

system.

Two-way digital communications is accomplished using only

two wires. The thermostat and air handler controls are pow-

ered with 24 VAC. A maximum of 4 wires between the air

handler and thermostat is required to operate the system.

An inverter equipped outdoor unit does not require 24 VAC.

Only the 2 digital communication wires are required between

the air handler and inverter unit (pins 1 and 2 on the thermo-

stat connector.)

16.2 Airflow Consideration

Airflow demands are managed differently in a fully commu-

nicating system than in a non-communicating wired system.

The system operating mode (as determined by the thermo-

stat) determines which unit calculates the system airflow de-

mand. If the indoor unit is responsible for determining the

airflow demand, it calculates the demand and sends it to the

ECM motor. If the outdoor unit or thermostat is responsible

for determining the demand, it calculates the demand and

transmits the demand along with a fan request to the indoor

unit. The indoor unit then sends the demand to the ECM mo-

tor. The table below lists the various ComfortNet systems,

the operating mode, and airflow demand source.

For example, assume the system is a heat pump matched with

an air handler. With a call for low stage cooling, the heat

pump will calculate the system’s low stage cooling airflow

demand. The heat pump will then send a fan request along

with the low stage cooling airflow demand to the air handler.

Once received, the air handler will send the low stage cooling

airflow demand to the ECM motor. The ECM motor then

delivers the low stage cooling airflow. See the applicable

ComfortNet air conditioner or heat pump installation manual

for the airflow delivered during cooling or heat pump heating.

In continuous fan mode, the CTK04 thermostat provides the

airflow demand. The CTKO4 provides 4 continuous fan speeds

(25%, 50%, 75% and 100% of maximum airflow). During

continuous fan operation, the thermostat sends a fan request

along with the continuous fan demand to the air handler. The

air handler, in turn, sends the demand to the ECM motor. The

ECM motor delivers the requested continuous fan airflow.

COMMUNICATIONS TROUBLESHOOTING CHART

LED

Status

Indication Possible Causes Corrective Action(s) Notes & Cautions

Off





None





None





None





None

1 Flash



Communications

Failure



Communications

Failure



Depres s Lea rn Button



Ve ri fy wi ri ng connecti on





Depress once quickly for

a power-up reset





Depress and hold for 5

seconds for an out-of-box

reset

Flashes



Out-of-box reset



Control power up



Learn button

depressed





None





None

Off



No power



Communications

error



No power to air

handler



Open fuse



Communications

error



Check fuses and circuit

bre a ke rs ; repl a ce /re s et



Replace blown fuse



Check for shorts in low

voltage wiring in air

handler/system



Res et network by

depressing learn button



Che ck data 1/da ta 2

voltages



Turn power OFF pri or to

repair

1 Ste a dy

Flash



No network

found



Broken/ disconnected

data wire(s )



Ai r ha ndl e r i s

installed as a non-

communicating/

traditional system



Check communications

wiring (data 1/data 2

wires)



Check wire connections at

terminal block



Ve ri fy ai r ha ndl e r

installation type (non-

communicating/

traditional or

communicating)



Check da ta 1/da ta 2

voltages



Turn power OFF pri or to

repair



Ve ri fy wi res a t termi nal

blocks are securely twisted

together prior to ins erti ng

into terminal block



Verify data 1 and data

voltages as described

above

Rapid

Flashing



Normal network

traffic



Control is "talking"

on network as

expected



None



None

On Solid



Data 1/Data 2

miss-wire



Data 1/da ta 2 wires

revers e d a t a i r

handler, thermostat,

or ComfortNet

compatible outdoor

AC/HP



Short between data

1/data 2 wires



Short between da ta 1

or data 2 wires and R

(24VAC) or C (24VAC

common)



Check communications

wiring (data 1/data 2

wires)



Check wire connections at

terminal block



Check da ta 1/da ta 2

voltages



Turn power OFF pri or to

repair



Ve ri fy wi res a t termi nal

blocks are securely twisted

together prior to ins erti ng

into terminal block



Verify data 1 and data

voltages as described

above

Red

Communications

LED

Green

Receive

LED

16.3 CTKO4 Thermostat Wiring

NOTE: Refer to section Electrical Connections for 208/230

volt line connections to the air handler.

NOTE: Use thermostat model that is later than CTK04AB.

NOTE: A removable plug connector is provided with the

control to make thermostat wire connections. This plug may

be removed, wire connections made to the plug, and replaced.

It is STRONGLY recommended that you do not connect

multiple wires into a single terminal. Wire nuts are

recommended to ensure one wire is used for each terminal.

Failure to do so may result in intermittent operation.

Typical 18 AWG thermostat wire may be used to wire the sys-

tem components. Two hundred fifty (250) feet is the maxi-

mum of wire between indoor unit and outdoor unit, or be-

tween indoor unit and thermostat.

16.3.1 Two-Wire Outdoor and Four-Wire Indoor Wiring

Typical wiring will consist of two wires between the indoor

unit and outdoor unit and four wires between the indoor

unit and thermostat. Figure 20 shows the required wires

are: data lines, 1 and 2; “R” (24 VAC hot) and “C” (24 VAC

common).

16.4 ComfortNet™ System Advanced Features

The ComfortNet system permits access to additional system

information, advanced set-up features, and advanced diag-

nostic/troubleshooting features. These advanced features are

organized into a menu structure. See the AIR HANDLER AD-

VANCED FEATURES MENU section for layout of menu short-

cuts. The tables on page 21, section 17 show the air handler

advanced feature menus.

16.5 Network Troubleshooting

The ComfortNet system is a fully communicating system, con-

stituting a network. Occasionally the need to troubleshoot

the network may arise. The integrated air handler control

has some on-board tools that can be used to troubleshoot

the network. These tools are: red communications LED, green

receive (Rx) LED, and the learn button. Refer to the Commu-

nications Troubleshooting Chart at the end of this manual for

error codes, possible causes and corrective actions

• Red communications LED – Indicates the status of the

network. The Communications Troubleshooting Chart on

the following page indicates the LED status and the

corresponding potential problem.

• Green receive LED – Indicates network traffic. The

following table indicates the LED status and the correspond-

ing potential problem.

• Learn button – Used to reset the network. Depress the

button for approximately 2 seconds to reset the network.

SYSTEM WIRING

Figure 19

12RC

CTK04

Thermostat

CT™ Compatible

Air Handler Blower

Integrated Control Module

CT™ Compatible AC/HP

Integrated Control Module

Cooling Air Conditioner

Heating Air Handler

Continuous Fan Thermostat

Cooling Heat Pump

Heat Pump

Heating Only

Heat Pump

HP+ Electric Heat

Strips

Greater than of

Heat Pump of Air

Handler Demand

Electric Heat

Strips Only

Air Handler

Continuous Fan Thermostat

Table 10

System

Operating Mode

Airflow Demand

Source

Air Conditioner

+ Air Handler

System

Heat Pump + Air

Handler

16.6 System Troubleshooting

NOTE: Refer to the instructions accompanying the

ComfortNet compatible outdoor AC/HP unit for unit specific

troubleshooting information. Refer to the Troubleshooting

Chart at the end of this manual for a listing of possible air

handler error codes, possible causes and corrective actions.

17 DIRECTIONS TO COMFORTNET SYSTEM ADVANCED

FEATURE MENUS

Press MENU, scroll down and press COMFORTNET USER MENU.

Enter the date code (password) when prompted. The date code is

printed on the back of the thermostat; or press

MENU>EQUIPMENT STATUS and scroll down to find the date code.

After you enter the date code, select air handler to view the sys-

tem menus.

17.2 Diagnostics

Accessing the air handler’s diagnostics menu provides ready

access to the most recent six faults detected by the air han-

dler. Faults are stored most recent to least recent. Any con-

secutively repeated fault is stored a maximum of three times.

Example: A clogged return air filter causes the air handler’s

motor to repeatedly enter a limiting condition. The control

will only store this fault the first three consecutive times the

fault occurs.

NOTE: It is highly recommended that the fault history be

cleared after performing maintenance or servicing the air

handler.

17.3 Identification

The identification menu displays the model number, serial

number and control software revision for the equipment. A

model number check will help determine if the equipment

shared data is correct for the unit (if the model number is not

correct for the air handler, a memory card will be required to

load the proper data).

Submenu Item Indication (for Display Only; not User Modifiable)

Model Number (MOD NUM) Displays the air handler model number

Serial Number (SER NUM) Displays the air handler serial number (Optional)

Software Version

(SOFTWARE)

Displays the application software revision

IDENTIFICATION

ADVANCED FEATURES IDENTIFICATION MENU CHART

Submenu Item

Indication/User

Modifiable Options

Comm ents

Fault 1 (FAULT #1) Most recent fault For display only

Fault 2 (FAULT #2) Next most recent fault For display only

Fault 3 (FAULT #3) Next most recent fault For display only

Fault 4 (FAULT #4) Next most recent fault For display only

Fault 5 (FAULT #5) Next most recent fault For display only

Fault 6 (FAULT #6) Least recent fault For display only

Clear Faults (CLEAR) NO or YES

Selecting “YES” clears

the fault history

NOTE: Consecutively repeated faults are show n a maximum of 3 times

DIAGNOSTICS

ADVANCED FEATURES DIAGNOSTICS MENU CHART

Figure 20

17.4 Set-Up

Submenu Item User Modifiable Options Comments

Choose the operation mode of Humidifier

(This selection is only displayed if HUM is selected in ACC)

HUM FAN SPD (%) 25%, 50%*, 75% , 100%

Choose the indoor fan speed at the time of humidification

(This selection is only displayed if IND is selected

in HUM and HUM is selected in ACC)

ACC HUM, W/BLWR, NONE*

Choose Accessory

(Humidifier, any other accessory requiring blower or none)

HT KIT (kW) All valid HT options Chose valid heater kit installed (Default setting is set to 'no heater kit')

Heat Airflow Trim

(%) (HT TRM)

0*, 2, 4, 6, 8, 10 Trims the heating airfl ow by the selected amount

SET-UP

HUM OFF*, ON, IND

The set-up menu allows for selecting accessories that may have

been connected to the indoor unit. User can choose between

Humidifier, W/BLWR for an accessory which is run in conjunc-

tion with the blower or none if no accessory is connected. HUM

(Humidity Setting) selection is only displayed if HUM is selected

in ACC. User can choose the operation mode of Humidifier.

HUM FAN SPD (Humidity Airflow) selection is only displayed if

IND is selected in HUM and HUM is selected in ACC. User can

choose the indoor fan speed trim at the time of humidification.

Heater kit selection can also be done from this menu. It is very

important to select the correct heater kit value for normal

operation of the system. The set-up menu allows for selecting

the trim adjustment of nominal electric heat airflow from 0% to

10% (in 2% incremental steps).

17.5 Status

This menu displays information about the systems current

status. This menu can be utilized to confirm correct function-

ality of the equipment and for troubleshooting purposes. It can

also be used to compare measured airflow values to the value

reported by the air handler.

The following items will be displayed:

Current Mode: Current system operational mode

(COOL, HEAT, FAN, AUX HEAT, DEFROST,

ON).

Current Airflow: Indoor unit airflow (CFM)

LIQ GAS TEMP: ID coil inlet temp, ID coil outlet temp

(cooling mode)

ID coil outlet temp, ID coil inlet temp

(heating mode)

PRESSURE: Indoor coil pressure sensor reading

REFRIGERANT: R-410A

SH and SC: ID super heat (cooling mode),

ID subcooling (heating mode)

FAN RUN TIME: Provides ID fan run time in hours

TROUBLESHOOTING

No display (EE

display is EMG

mode)

INTERNAL FAULT

• No power supply to ID blower / no

24 volt power to PCB

• Blown fuse or circuit breaker

• PCB has an internal fault

• Manual disconnect switch OFF

• No power supply to ID blower / no 24 volt power to PCB

• Blown fuse or faulty circuit breaker

• Control board has internal fault

Eb E_Eb No Display

Selecting "no heater kit" and

receiving electric heat demand

• No heater kit selected

Ed E_Ed

Check Heater Kit Dip

Switches

(CHECK HTR DIPSW)

Heater Kit dip switches not set

properly

• Invalid heater kit selected

E5 E_E5 BLOWN FUSE Fuse Open

• Fuse (F1U) is blown

• Connector TB10 is open

EF E_EF

Auxiliary Contacts Open

(AUX ALARM FAULT)

Auxiliary Switch Open

• High water level in the evaporation coil

• The connected alarm device is activated

• Auxiliary Alarm terminals (TB4, TB5) are open

d0 E_d0

Data Not Yet On Network

(NO NET DATA)

Data not on Network • No shared data on the network

d1 E_d1

Invalid Data On Network

(INVALID DATA)

Invalid Data on Network • Wrong shared data on the network

d4 E_d4

Invalid Memory Card data

(INVALID MC DATA)

Invalid Memory Card Data • Wrong memory card data

b0 E_b0

Blower Motor Not Running

(MOTOR NOT RUN)

Blower Motor not running

• Fan/motor obstruction

• Power interruption (low voltage)

• Incorrect / loose wiring

b1 E_b1

Blower Communication Error

(MOTOR COMM)

Blower Motor Communication error

• Incorrect / loose wiring

• Power interruption (low voltage)

b2 E_b2

Blower Motor HP Mismatch

(MOTOR MISMATCH)

Blower Motor HP Mismatch

• Incorrect size motor

• Invalid shared data

b3 E_b3 No Display

Blower Motor operating in Power,

Temp or Speed Limiting conditions

• Fan/motor obstruction or blocked filters

• Power interruption (low voltage)

• Incorrect wiring

• Blockage in the airflow (ductwork) or ductwork undersized

Error

Code

De scri p tion P ossi b l e Ca use sClimateTalk MessagePCB LED Display

• Assure 208/230 volt and 24 volt power to blower and control board.

• Check fuse F2U on control board

• Check for possible short in 208/230 volt and 24 volt circuits. Repair as necessary.

• Replace the control board.

• Select the valid heater kit on thermostat

• Valid dip switch selection (heater kit selection out of range of the unit configuration)

• Set correct dip switches

• Replace fuse

• Check wiring to AUX alarm, heater kit, communication connection.

• Replace the control board

After recovering the system, E5 will still be displayed on the indoor PCB (about

30 seconds). BLOWN FUSE will still be displayed on the thermostat within 45 seconds.

They will be cleared automatically.

• Check water level in drain pan

• Check alarm device.

• Close Auxiliary terminals TB4 and TB5 if not used

After recovering the system, EF will still be displayed on the indoor PCB (about

30 seconds). AUXILIARY CONTACTS OPEN will still be displayed on the thermostat

within 45 seconds. They will be cleared automatically.

• Populate shared data set using memory card.

• Replace circuit board

• Rewrite data using the correct memory card

• Check for obstruction on the fan/motor

• Verify the input voltage at the motor

• Check wiring or tighten wiring connections if needed

• Replace circuit board or motor

• Check wiring or tighten wiring connections if needed

• Verify the input voltage at the motor

• Replace circuit board or motor

• Correct motor installation

• Populate shared data set using memory card.

• Check for obstruction on the fan/motor/ductwork, clean filters

• Verify the input voltage at the motor

• Check wiring

• Replace motor

Corrective Actions

TROUBLESHOOTING

b4 E_b4

BLower Motor Trip

or Lost Rotor

(MOTOR TRIPS)

Blower Motor -

Current Trip (or) Lost Rotor

• Fan/motor obstruction or abnormal motor loading

• Power interruption (low voltage)

• High loading conditions, blocked filters

• Blockage in the airflow (ductwork) or ductwork undersized

b6 E_b6

Voltage or Temperature Trip

(MOTOR VOLTS)

• Blower motor stops for over/under

voltage

• Bower motor stops due to PCB

over heating

• High AC line voltage to ID blower

• Low AC line voltage to ID blower

• High ambient temperatures

• Incorrect wiring

• Fan/motor obstruction or blockage in the airflow

b7 E_b7

Incomplete Parameters

Sent to Motor

(MOTOR PARAMS)

ID blower motor does not have

required parameters to function.

• Wrong / no shared data on the network

• Locked motor rotor condition

b9 E_b9 No Display

Low Indoor Airflow

(without Electric Heat mode)

• Fan/motor obstruction or blocked filters

• Restrictive ductwork or ductwork undersized

• W iring disconnected

• Wrong outdoor/indoor combination

• ID motor failure

9b E_9b LOW ID AIR EH MODE

Low Indoor Airflow

(with Electric Heat mode)

• Fan/motor obstruction or blocked filters

• Restrictive ductwork or ductwork undersized

• ID motor failure

• W iring disconnected

70 E_70 EEV OPEN CKT EEV disconnection detected

• Indoor EEV coil not connected

• Incorrect wiring to EEV

73 E_73 LIQ TEMP FLT Liquid side thermistor abnormality

• Open (or) short circuit of the liquid thermistor (X5A)

• Liquid thermistor reading incorrect or values outside the normal range

74 E_74 GAS TEMP FLT Gas side thermistor abnormality

• Open (or) short circuit of the gas thermistor (X5A)

• Gas thermistor reading incorrect or values outside the normal range

75 E_75 PRESSURE FLT Pressure sensor abnormality

• Open (or) short circuit of the Pressure sensor (X15A)

• Pressure sensor reading incorrect or values outside the normal range

77 E_77 TSTAT ID NO COM

Indoor Unit - Thermostat

communication error

(start-up & during operation)

• Incorrect wiring between ID unit and thermostat.

The system may have the communication error without error code 77

on the indoor PCB. Follow section 16.6 SYSTEM TROUBLESHOOTING

• Thermostat failure

• Power interruption (low voltage)

Error

Code

De sc ri pti on Possi bl e Ca use sClimateTalk MessagePCB LED Display

• Check for obstruction on the fan/motor/ductwork

• Verify the input voltage at the motor

• Check filters, grills, duct system, coil air inlet/outlet for blockages.

• Replace motor

• Verify line voltage to blower is within the range specified on the ID blower rating plate

• See "Installation Instructions" for installation requirements

• Check power to air handler blower

• Check for obstruction on the fan/motor/ductwork

• Check wiring

• Replace motor

• Check for locked rotor condition (see above error code for details)

• Replace circuit board or motor

• Check for obstruction on the fan/motor

• Check ductwork/filter for blockage, clean filters

• Remove obstruction. Verify all registers are fully open

• Check the connections and the rotation of the motor

• Verify the input voltage at the motor

• Verify ductwork is appropriately sized for system. Resize/replace ductwork if needed

• Replace motor

• Check for obstruction on the fan/motor

• Check ductwork/filter for blockage, clean filters

• Remove obstruction. Verify all registers are fully open

• Check the connections and the rotation of the motor

• Verify the input voltage at the motor

• Verify ductwork is appropriately sized for system. Resize/replace ductwork if needed

• Replace motor

• Check Indoor EEV coil connection (PCB and junction connector)

• Replace EEV coil

• Check the resistance value of EEV coil (refer service manual)

• Replace the control board

• Check the connection to liquid thermistor (PCB and junction connector)

• Check the resistance value of the thermistor (refer service manual)

• Replace thermistor

• Replace the control board

• Check the connection to gas thermistor (PCB and junction connector)

• Check the resistance value of the thermistor (refer service manual)

• Replace thermistor

• Replace the control board

• Check the connection to pressure sensor (PCB and junction connector)

• Check the output voltage of the pressure sensor (refer service manual)

• Replace pressure sensor

• Replace the control board

• Check for thermostat and indoor unit wiring

• Verify the input voltage at the ID unit and thermostat

After recovering the system with power supply, TSTAT ID NO COM will continue to be

displayed on the thermostat within 2 minutes. The error code will be cleared automatically.

• Replace control board or thermostat

• Press "LEARN" button on PCB for more than 5 seconds to reestablish network

Corre ctive Actions

DIAGNOSTIC CODES

On Normal Operation

Eb NO HTR KIT INSTALLED - SYSTEM CALLING FOR AUXILIARY HEAT (Minor Error Code) (No Display)

Ed HEATER KIT DIP SWITCHES NOT SET PROPERLY Check Heater Kit Dip Switches

E5 FUSE OPEN BLOWN FUSE

EF AUXILIARY SWITCH OPEN Auxiliary Contacts Open

d0 DATA NOT ON NETWORK Data Not Yet On Network

d1 INVALID DATA ON NETWORK Invalid Data On Netwrok

d4 INVALID MEMORY CARD DATA Invalid Memory Card data

b0 BLOWER MOTOR NOT RUNNING Blower Motor Not Running

b1 BLOWER MOTOR COMMUNICATION ERROR Blower Communication Error

b2 BLOWER MOTOR HP (Horse power) MISMATCH Blower Motor HP Mismatch

b3 BLOWER MOTOR OPERATING IN POWER, TEMP., OR SPEED LIMIT (No Display)

b4 BLOWER MOTOR CURRENT TRIP OR LOST ROTOR Blower Trip or Lost Rotor

b6 OVER/UNDER VOLTAGE TRIP OR OVER TEMPERATURE TRIP Voltage or Temperature Trip

b7 INCOMPLETE PARAMETER SENT TO MOTOR Incomplete Parameters Sent to Motor

b9 LOW INDOOR AIRFLOW (Minor Error Code) (without EH mode) (No Display)

LOW INDOOR AIRFLOW

(Major Error Code) (EH mode only)

LOW ID AIR EH MODE

70 EEV DISCONNECTION DETECTED

EEV OPEN CKT

73 LIQUID SIDE THERMISTOR ABNORMALITY

LIQ TEMP FLT

74 GAS SIDE THERMISTOR ABNORMALITY

GAS TEMP FLT

75 PRESSURE SENSOR ABNORMALITY

PRESSURE FLT

INDOOR UNIT - THERMOSTAT COMMUNICATION ERROR

(STARTUP OPERATION & DURING OPERATION)

TSTA T ID NO COM

HUMIDIFICATION DEMAND

(Running without heating)

FC FAN COOL - COMMUNICATING MODE ONLY (Fan Demand-Cool)

FH FAN HEAT - COMMUNICATING MODE ONLY (Fan Demand-Heat)

F FAN ONLY (Fan Demand-Manual)

H1 ELECTRIC HEAT LOW (Heat Demand, Back-up Heat Demand)

H2 ELECTRIC HEAT HIGH (Heat Demand, Back-up Heat Demand)

dF DEFROST - COMMUNICATING MODE ONLY (note: defrost is displayed as H1 in a legacy setup)

7 SEGMENT LED

DISPLAY

DESCRIPTION OF CONDITION ERROR MESSAGE

MODE DISPLAY INTRODUCTION

A 2-digit display is provided on the printed circuit board (PCB) as a backup tool to the

thermostat for accessing error codes and erasing error code history of the indoor unit. Follow the

information provided in this section to learn how to use the mode display

DISPLAY

The display consists of 2 digits.

DISPLAY BUTTON LAYOUT

The display buttons shown can be used to navigate and select items:

FAULT CODE HISTORY NAVIGATION

This mode will allow the user to see the six most recent system faults. Please follow the flow chart to

navigate to error codes from screen zero.

For a list of the fault codes, please see the TROUBLESHOOTING tables in this document.

It is also possible to erase all the diagnostics codes from this menu.

SETTING THE MODE DISPLAY

Release Fault

Recall in between

5to 10sec

Release Fault

Recall in between

10 to 15 sec

Release Fault

Recall after 15 sec

Hold Fault Recall for

more than 10 sec

Solid Display

Hold Fault

Recall for more

than 2 sec

Release Fault

Recall between 2

to 5 sec

Hold Fault

Recall for more

than 5 sec

Flashing Display

First Error Code

Last Error Code

Press Fault Recall

for Error Code

Press Fault Recall

for Error Code

Press Fault Recall

to complete list

Release Fault

Recall in less

than 2 sec

Flashing Display

Solid Display “88” for

3 sec before erasing all

Diagnostic Codes

Second Error Code

0.2 sec ON – 0.2 sec OFF

0.5secON–0.25secOFF

Idle

for

mins.

WIRING DIAGRAM

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE

SERVICING. MULTIPLE POWER SOURCES MAY BE

PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY

DAMAGE, PERSONAL INJURY OR DEATH.

NOTE: THESE INSTRUCTIONS ARE SPECIFICALLY FOR AVPEC

MODELS. DO NOT ATTEMPT TO APPLY THESE DIAGRAMS FOR ANY

OTHER MODELS.

0140A00501-A

HEATER KIT

OUTPUT

RD BK

GROUND LUG

(SEE NOTE 4)

24VAC

TB5

TB4

INSTALLING

AUX ALARM

(ALARM)

(SEE NOTE 9)

24VAC

MOCM

208

VAC

230

VAC

208

VAC

230

VAC

TR1

(SEE NOTE 1)

TR2

(SEE NOTE 1)

FAN

MOTOR

ECM MOTOR

PL1

PL2

321

PL3

PL4

GRND

AIR

COM

208/230 VAC

CONDENSATE SWITCH

INDOOR

HEAT 1 COIL/R1

INTEGRATED CONTROL MODULE

CIRCULATOR

+VDC (1)

GRND

BLWR

W2 (2)

40 VA

MICRO

CIRCULATOR

INDOOR

DEHUM

GRND (4)

24V THERMOSTAT CONNECTIONS

RX (2)

24 VAC

AIR

CAS (1)

FUSE 3 A

GRND

TX (3)

W1 (1)

CAS (2)

TRANSFORMER

DISCONNECT

HEAT 2 COIL/ R2

INTEGRATED CONTROL:

POWER/HEATER

CONNECTOR

PL1, PL2

COMPONENT CODES:

F1U, F2U

THERMAL LIMIT

TRANSFORMER

FUSE LINK

NOTES:

1. PLACE RED WIRES ON 208 V TERMINAL OF

2-TRANSFORMER (TR1/TR2) FOR 208 VAC

OPERATION.

2. MANUFACTURER’S SPECIFIED REPLACEMENT

PARTS MUST BE USED WHEN SERVICING.

3. IF ANY OF THE ORIGINAL WIRES AS

SUPPLIED WITH THIS UNIT MUST

BE REPLACED, IT MUST BE REPLACED

WITH WIRING MATERIAL HAVING A

TEMPERATURE RATING OF AT LEAST 105C.

USE COPPER CONDUCTORS ONLY.

4. UNIT MUST BE PERMANENTLY GROUNDED

AND CONFORM TO N.E.C ANDLOCAL CODES.

5. TO RECALL THE LAST 6 FAULTS, MOST

RECENT TO LEAST RECENT, DEPRESS

FAULT RECALL BUTTON FOR MORE THAN 2

SECONDS WHILE IN STANDBY (NO THERMOSTAT

INPUTS)

6. RED STATUS LED PROVIDES NETWORK STATUS.

GREEN RX LED INDICATES NETWORK TRAFFIC.

USE LEARN BUTTON TO RESET NETWORK.

7. DISCARD CONNECTOR PL1 WHEN

INSTALLING OPTIONAL HEAT KIT.

8. THE POSITION OF SELECTOR SWITCHES

(DS1 - DS6) INDICATE FACTORY SETTING.

9. REMOVE SHORT RED CIRCUITING WIRE AND

PUT AUX ALARM SWITCH WHEN INSTALLING AUX

ALARM SWITCH.

10. USE N.E.C CLASS 2 WIRE.

SELECTOR SWITCHDS1 - DS6

COLOR CODES:

BL - BLUE

RD - RED

YL - YELLOW

OR - ORANGE

BK - BLACK

GY - GREY

BR - BROWN

GR - GREEN

PU - PURPLE

WH - WHITE

LOW VOLTAGE

LOW VOLTAGE FIELD

HIGH VOLTAGE

HIGH VOLTAGE FIELD

JUNCTION

TERMINAL

INTERNAL TO

RESISTOR

OVERCURRENT

PROT. DEVICE

PLUG CONNECTION

EQUIPMENT GND

FIELD GROUND

(SEE NOTE 6)

FAULT RECALL

(SEE NOTE 5)

(SEE NOTE 6)

STATUS LED

X3A

X15A

BS2

X5A

X2A

BS1

SEG2

SEG1

DS1

DS2

X7A

X12A

X13A

RX LED

X8A

INDOOR UNIT

PCB

THERMISTOR

(HEAT EXCHANGER 1,2)

INTEGRATION

TYPE

MPU

CPU LED

PRESSURE

SENSOR

EEV

COIL

EEV

K1R

K2R

LEARN

F2U

TR1

TH1

TB2

TB1

R2 1

DEHUM

ON OFF

X1A

TH2

TB10

TR2

TB3

F1U

TB4

TB5

TB8

ACC-OUT

ACC-IN

TB6

TB7

COM

DS3

DS4

DS5

DS6

X3A

X15A

BS2

X5A

X2A

BS1

SEG2

SEG1

DS1

DS2

X7A

X12A

X13A

RX LED

X8A

INDOOR UNIT

PCB

THERMISTOR

(HEAT EXCHANGER 1,2)

INTEGRATION

TYPE

MPU

CPU LED

PRESSURE

SENSOR

EEV

COIL

EEV

K1R

K2R

LEARN

F2U

TR1

TH1

TB2

TB1

R2 1

DEHUM

ON OFF

X1A

TH2

TB10

TR2

TB3

F1U

TB4

TB5

TB8

ACC-OUT

ACC-IN

TB6

TB7

DS3

DS4

DS5

DS6

AUX ALARM

(ALARM)

AUX ALARM

(ALARM)

RELAY IN

(ACC-OUT)

RELAY OUT

(ACC-IN)

(SEE NOTE 7)

THERMOSTAT

208/230

VAC

HEATER KIT

AIR HANDLER HOMEOWNER’S ROUTINE MAINTENANCE

RECOMMENDATIONS

We strongly recommend a bi-annual maintenance

checkup be performed before the heating and cooling

seansons begin by a

qualified servicer.

REPLACE OR CLEAN FILTER

IMPORTANT NOTE: Never operate unit without a filter installed

as dust and lint will build up on internal parts resulting in loss of

efficiency, equipment damage and possible fire.

An indoor air filter must be used with your comfort system. A prop-

erly maintained filter will keep the indoor coil of your comfort

system clean. A dirty coil could cause poor operation and/or se-

vere equipment damage.

Your air filter or filters could be located in your furnace, in a blower

unit, or in “filter grilles” in your ceiling or walls. The installer of

your air conditioner or heat pump can tell you where your filter(s)

are, and how to clean or replace them.

Check your filter(s) at least once a month. When they are dirty,

replace or clean as required. Disposable type filters should be re-

placed. Reusable type filters may be cleaned.

You may want to ask your dealer about high efficiency filters. High

efficiency filters are available in both electronic and non-electronic

types. These filters can do a better job of catching small airborne

particles.

MOTORS

Indoor and outdoor fan motors are permanently lubricated and

do not require additional oiling.

ALUMINUM INDOOR COIL CLEANING

(QUALIFIED SERVICER ONLY)

This unit is equipped with an aluminum tube evaporator coil. The

safest way to clean the evaporator coil is to simply flush the coil

with water. This cleaning practice remains as the recommended

cleaning method for both copper tube and aluminum tube resi-

dential evaporator coils.

It has been determined that many coil cleaners and drain pan tab-

lets contain corrosive chemicals that can be harmful to aluminum

tube and fin evaporator coils. Even a one-time application of these

corrosive chemicals can cause premature aluminum evaporator

coil failure. Any cleaners that contain corrosive chemicals includ-

ing, but not limited to, chlorine and hydroxides, should not be

used.

An alternate cleaning method is to use one of the products listed

in TP-109* to clean the coils. The cleaners listed are the only agents

deemed safe and approved for use to clean round tube aluminum

coils. TP-109 is also available on the web site in Partner Link >

Service Toolkit.

NOTE: Ensure coils are rinsed well after use of any chemical clean-

ers.

BEFORE YOU CALL YOUR SERVICER

• Check the thermostat to confirm that it is properly set.

• Wait 15 minutes. Some devices in the outdoor unit or in

programmable thermostats will prevent compressor opera-

tion for awhile, and then reset automatically. Also, some

power companies will install devices which shut off air con-

ditioners for several minutes on hot days. If you wait sev-

eral minutes, the unit may begin operation on its own.

• Check the electrical panel for tripped circuit breakers or

failed fuses. Reset the circuit breakers or replace fuses as

necessary.

• Check the disconnect switch near the indoor furnace or

blower to confirm that it is closed.

• Check for obstructions on the outdoor unit . Confirm that it

has not been covered on the sides or the top. Remove any

obstruction that can be safely removed. If the unit is cov-

ered with dirt or debris, call a qualified servicer to clean it.

• Check for blockage of the indoor air inlets and outlets. Con-

firm that they are open and have not been blocked by ob-

jects (rugs, curtains or furniture).

• Check the filter. If it is dirty, clean or replace it.

• Listen for any unusual noise(s), other than normal operat-

ing noise, that might be coming from the outdoor unit. If

you hear unusual noise(s) coming from the unit, call a quali-

fied servicer.

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Goodman AVPEC25B14 2 Ton Multi-Positional Variable Speed Air Handler

Product's Documents

AVPEC Installation Instructions

Specifications

Goodman AVPEC25B14 Questions and Answers