Amana AVPTC33C14 Manual

AVPTC**14** ©2016-2017 Goodman Manufacturing Company, L.P.
5151 San Felipe, Suite 500, Houston, TX 77056
www.goodmanmfg.com - or - www.amana-hac.com
P/N: IOA-4021D Date: December 2017
AIR HANDLERS
INSTALLATION & OPERATING INSTRUCTIONS
®
is a registered trademark of Maytag Corporation or its related companies and is used under license. All rights reserved.
ATTENTION INSTALLING PERSONNEL
Prior to installation, thoroughly familiarize yourself with this Installa-
tion Manual. Observe all safety warnings. During installation or repair,
caution is to be observed. It is your responsibility to install the product
safely and to educate the customer on its safe use.
RECOGNIZE THIS SYMBOL AS A
SAFETY PRECAUTION.
Contents
1 Important Safety Instructions ............................................... 2
2 Shipping Inspection .............................................................. 3
3 Codes & Regulations ............................................................. 3
4 Replacement Parts ............................................................... 3
5 Pre-Installation Considerations ............................................. 3
6 Installation Location ............................................................. 3
7 Refrigerant Lines .................................................................. 5
8 Condensate Drain Lines......................................................... 8
9 Ductwork ............................................................................. 9
10 Return Air Filters .................................................................. 9
11 Electric Heat ......................................................................... 9
12 Electrical and Control Wiring ............................................... 10
13 Achieving 1.4% and
2.0% Airflow Low Leakage Rate ........................................ 11
14 24 Volt Wiring .................................................................... 11
15 Auxiliary Alarm Switch ........................................................ 12
16 AVPTC Motor Orientation ................................................... 12
17 Circulator Blower ............................................................... 13
18 Heat Kit Selection ............................................................... 16
19 Troubleshooting ................................................................. 16
20 ComfortNet™ System ........................................................ 17
21 Start-Up Procedure ............................................................ 19
23 Communications Troubleshooting Chart ............................. 20
24 Air Handler Advanced Features Menu ................................ 21
25 Troubleshooting ................................................................. 22
26 Diagnostic Codes ................................................................ 26
27 Wiring Diagrams ................................................................. 27
O NLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL , ADJUST , SERVICE OR
REPAIR ( HEREINAFTER , “ SERVICE ”) THE EQUIPMENT SPECIFIED IN THIS MANUAL
SHOULD SERVICE THE EQUIPMENT . T HE MANUFACTURER WILL NOT BE RESPONSIBLE
FOR ANY INJURY OR PROPERTY DAMAGE ARISING FROM IMPROPER SERVICE OR
SERVICE PROCEDURES . I F YOU SERVICE THIS UNIT , YOU ASSUME RESPONSIBILITY
FOR ANY INJURY OR PROPERTY DAMAGE WHICH MAY RESULT . I N ADDITION , IN
JURISDICTIONS THAT REQUIRE ONE OR MORE LICENSES TO SERVICE THE EQUIPMENT
SPECIFIED IN THIS MANUAL , ONLY LICENSED PERSONNEL SHOULD SERVICE THE
EQUIPMENT . I MPROPER INSTALLATION , ADJUSTMENT , SERVICING OR REPAIR OF
THE EQUIPMENT SPECIFIED IN THIS MANUAL , OR ATTEMPTING TO INSTALL , ADJUST ,
SERVICE OR REPAIR THE EQUIPMENT SPECIFIED IN THIS MANUAL WITHOUT PROPER
TRAINING MAY RESULT IN PRODUCT DAMAGE , PROPERTY DAMAGE , PERSONAL
INJURY OR DEATH .

2
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.
Failure to heed safety information increases the risk of personal
injury, property damage, and/or product damage.
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.
This product is factory-shipped for use with
208/240/1/60 electrical power supply.
reconfigure this air handler to operate with any other
power supply.
DO NOT
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
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.), bserve
these requirements.
o
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.
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.
Do not connect to or use any device that is not design-
certified by the manufacturer for use with this unit.
Serious property damage, personal injury, reduced
unit performance and/or hazardous conditions may
result from the use of such non-approved devices.

3
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 subse-
quent investigation is the responsibility of the carrier. The installer
must verify the model number, specifications, electrical charac-
teristics, and accessories are correct prior to installation. The dis-
tributor 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 imme-
diately to Goodman or to the distributor. Use only factory
authorized replacement parts (see Section 5). Make sure to
include the full product model number and serial number
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 ar-
rival 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 cor-
ners.
3 Codes & Regulations
This product is designed and manufactured to comply with appli-
cable national codes. Installation in accordance with such codes
and/or prevailing local codes/regulations is the responsibility of
the installer. The manufacturer assumes no responsibility for equip-
ment installed in violation of any codes or regulations.
The United States Environmental Protection Agency (EPA) has
issued various regulations regarding the introduction and disposal
of refrigerants. Failure to follow these regulations may harm the
environment and can lead to the imposition of substantial 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 available
through your contractor or local distributor. For the location of
your nearest distributor consult the white business pages, the yel-
low page section of the local telephone book or contact:
HOMEOWNER SUPPORT
GOODMAN MANUFACTURING COMPANY, L.P.
19001 KERMIER ROAD,
WALLER, TX 77484
[phone]
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
considerations are taken into account before starting instal-
lation. 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-Condition-
ing, Heating, and Refrigeration Institute (AHRI) listed. NOTE:
Installation of unmatched systems is not permitted. Damage
or repairs due to installation of unmatched systems is not
covered under the warranty.
5.3 InterconnectingTubing
Give special consideration to minimize the length of refriger-
ant tubing when installing air handlers. Refer to Remote Cool-
ing/Heat Pump Service Manual RS6200006, and TP-107 Long
Line Set Application R-410A for tubing 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 appro-
priate 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
barrier to prevent such damage. Always install units such
that a positive slope in condensate line (1/4" per foot) is
allowed.
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 conden-
sate discharge.
6 Installation Location
NOTE: These air handlers are designed for indoor installation
only.
The AVPTC**14** product line may be installed in one of the
upflow, downflow, horizontal left or horizontal right orientations
as shown in Figures 2, 3, 4 and 5. The unit may be installed in
upflow or horizontal left orientation as shipped (refer to specific
sections for more information).

4
Minor field modifications are necessary to convert to downflow
or horizontal right as indicated in below sections.
6.1 UpflowInstallation
No field modifications are mandatory; however, to obtain
maximum 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, re-
move the two (2) screws that secure the drip shield support
brackets to the condensate collectors (front and back). Un-
snap the side drain pan from the main drain pan using a screw
driver or any small lever. The side drain pan, drip shield brack-
ets 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).
Drip Pan
Extension
Side
Drain
Pan
Screw
B
b
AMain Drain Pan
Drip Shield Bracket
Drip Shield
Pna
SIDE DRAIN PAN REMOVAL
Figure 1
6.2 Horizontal Left Installation
No field modifications are permissible for this application.
The bottom right drain connection is the primary drain for
this application and condensate drain line must be attached
to this drain connection. The top connection of the three drain
connections on the drain pan must remain plugged for this
application. The bottom left drain connection is for the sec-
ondary drain line (if used).
In applications where the air handler is installed in the hori-
zontal left position, and the return air environment see hu-
midity 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 Table 1.
CMK0008
Condensate
Kit
CMK0009
Condensate
Kit
CMK0010
Condensate
Kit
CMK0012
Condensate
Kit
CMK0013
Condensate
Kit
CMK0014
Condensate
Kit
AVPTC25B14 AVPTC29B14 AVPTC31C14 AVPTC49D14 AVPTC33C14 AVPTC49C14
AVPTC37B14 AVPTC37C14 AVPTC61D14 AVPTC39C14
AVPTC37D14
AVPTC59C14
AVPTC59D14
CONDENSATE KIT
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 Goodman distributor. The DFK is not supplied with
the air handler and is required by Goodman on all downflow
installations. See Table 2 for the correct DFK and follow the
instructions provided for installation.
DFK-B
Downflow Kit
DFK-C
Downflow Kit
DFK-D
Downflow Kit
AVPTC25B14** AVPTC31C14** AVPTC37D14**
AVPTC29B14** AVPTC37C14** AVPTC49D14**
AVPTC35B14** AVPTC59C14** AVPTC59D14**
AVPTC37B14** AVPTC33C14** AVPTC61D14**
AVPTC39C14**
AVPTC49C14**
MODEL LIST FOR DOWNFLOW KITS
DOWNFLOW KIT
TABLE 2
Refer to Figure 6 and 7 for the location of the components
referenced in the following steps.
1. Before inverting 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. Re-
move and retain the seven (7) screws securing the coil ac-
cess panel to the cabinet and the six (6) screws securing the
blower access panel to the cabinet.
2. Slide the coil assembly out using the drain pan to pull the
assembly from the cabinet.
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.
3. Removal of the center support is required on units with 21"
wide cabinet. Remove and retain the two (2) screws that
secure the center support to the cabinet. Remove the cen-
ter support.
4. Using the drain pan to hold the coil assembly, slide the coil
assembly back into the cabinet on the downflow brackets as
shown in Figure 8.
5. Re-install the center support (if removed) using the two (2)
screws removed in Step 4.
6. Re-install the access panels removed in Step 1 as shown in
Figure 9.

5
7. The bottom left drain connection is the primary drain for
this application and condensate drain line must be attached
to this drain connection. The top connection of the three
drain connections on the drain pan must remain plugged for
this application. The bottom left drain connection is for the
secondary drain line (if used).
UPFLOW DOWFLOW
Figure 2 Figure 3
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.
Do not install the air handler in a location that violates the
instructions provided with the condenser. If the unit is located in
an unconditioned area with high ambient temperature and/or high
humidity, 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.
HORIZONTAL LEFT
Figure 4
HORIZONTAL RIGHT
Figure 5
7 Refrigerant Lines
NOTE: Refrigerant tubing must be routed to allow adequate ac-
cess for servicing and maintenance of the unit.
7.1 Tubing Size
For the correct tubing size, follow the specification for the
condenser/heat pump.
7.2 Tubing Preparation
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 sen-
sitive components such as service valves and TXV valves sens-
ing bulb.
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.
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

6
EXTERNAL PART TERMINOLOGY
Figure 7
INTERNAL PART TERMINOLOGY
Figure 6
ACCESS PANEL CONFIGURAATION
FOR DOWNFLOW
OR HORIZONTAL RGHT
Figure 9
Blower
Access
Panel
Coil
Access
Panel
Tubing
Panel
UV
Knockout
Upper Tie Plate
Control
Deck
Downflow
Bracket
Center
Support
Filter
Bracket
Filter
Access
Panel
Coil Slides
on the downflow bracket
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.
COIL INSTALLATION FOR DOWNFLOW
Figure 8
Remove side drain pan
extension for
downflow application

7
7.3 Tubing Connections for TXV Models
TXV models come with factory installed TXV with the bulb
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 grom-
met 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.
NOTE: The sensing bulb must be permanently located. A heat
shield, heat trap, or wet rag must be used during brazing to pre-
vent damage to the TXV valve.
8. Replace access panels, suction line grommet, insulation and
all screws.
RUBBER
GROMMET
SUCTION LINE
WITH SPIN CLOSURE
Suction Line Grommet
Figure 11
7.4 Thermal Expansion Valve System Adjustment
Run the system at Cooling for 10 minutes until refrigerant
pressures stabilize. Use the following guidelines and meth-
ods to check unit operation and ensure that the refrigerant
charge is within limits. Charge the unit on low stage.
1. Purge gauge lines. Connect service gauge manifold to base-
valve service ports.
2. Temporarily install a thermometer on the liquid line at the
liquid line service valve and 4-6’’ from the compressor on
the suction line. Ensure the thermometer makes adequate
contact and is insulated for best possible readings. Use liq-
uid line temperatice to determine subcooling and vapor tem-
perature to determine superheat.
3. Check subcooling and superheat. Systems with TXV applica-
tion should have a subcooling of 7 to 9°F and superheat of 7
to 9°F
a. If subcooling and superheat are low, adjust TXV to 7 to
9°F, and then check subcooling.
NOTE: To adjust superheat, turn the valve stem clockwise to in-
crease and counter clockwise to decrease.
b. If subcooling is low and superheat is high, add charge to
raise subcooling to 7 to 9°F, and then check superheat.
c. If subcooling and superheat are high, adjust TXV valve to
7 to 9° superheat, then check subcooling.
d. If subcooling is high and superheat is low, adjust TXV valve
to 7 to 9° superheat and remove charge to lower the subcooling
to 7 to 9°F.
NOTE: Do NOT adjust the charge based on suction pressure un-
less there is a gross undercharge.
4. Disconnect manifold set, and installation is complete
NOTE: Check the Schrader ports for leaks and tighten valve cores
if necessary. Install caps finger-tight.
SUBCOOL FORMULA=
SAT. LIQUID LINE TEMP - LIQUID LINE TEMP
SUPERHEAT FORMULA=
SUCT. LINE TEMP - SAT. SUCT. TEMP
SUCTION PRESSURE
PSIG R-22 R-410A
50 26 1
52 28 3
54 29 4
56 31 6
58 32 7
60 34 8
62 35 10
64 37 11
66 38 13
68 40 14
70 41 15
72 42 16
74 44 17
76 45 19
78 46 20
80 48 21
85 50 24
90 53 26
95 56 29
100 59 31
110 64 36
120 69 41
130 73 45
140 78 49
150 83 53
160 86 56
170 90 60
SATURATED SUCTION PRESSURE
TEMPERATURE CHART
SATURATED SUCTION
TEMPERATURE ºF

8
LIQUID PRESSURE
PSIG R-22 R-410A
200 101 70
210 105 73
220 108 76
225 110 78
235 113 80
245 116 83
255 119 85
265 121 88
275 124 90
285 127 92
295 130 95
305 133 97
325 137 101
355 144 108
375 148 112
405 155 118
415 157 119
425 n/a 121
435 n/a 123
445 n/a 125
475 n/a 130
500 n/a 134
525 n/a 138
550 n/a 142
575 n/a 145
600 n/a 149
625 n/a 152
SATURATED LIQUID PRESSURE
TEMPERATURE CHART
SATURATED LIQUID
TEMPERATURE ºF
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
material.
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 pri-
mary 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.
CAUTION
If secondary drain is not installed, the secondary
access must be plugged.
Insulate drain lines located inside the building or above a fin-
ished living space to prevent sweating. Install a condensate trap
to ensure proper drainage.
NOTE: When units are installed above ceilings, or in other
locations where damage from condensate overflow may
occur, it is MANDATORY to install a field fabricated auxiliary
drain pan under 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
details 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 over-
flow.
Air Handler
3" MIN.
POSITIVE LIQUID
SEAL REQUIRED
AT TRAP
Drain
Connection
2" MIN.
Figure 12
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.
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. 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.
Tip: Priming the “P” trap may avoid improper draining at the ini-
tial installation and at the beginning of the cooling season.

9
9 Ductwork
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 connected to the air handler bottom (upflow configura-
tion).
10 Return Air Filters
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).
11 Electric Heat
Do not operate this product without all the ductwork
attached.
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 HKS series. Refer to the air handler
unit’s Serial and Rating plate or the HKS specification 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.
The heating mode temperature rise is dependent upon the sys-
tem 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).
3 5 6 8 10 15 19/20 25
800 121923313756
1000 9 1519253044
1200 8 12152125374962
1400 7 11131821324253
1600 6 9 12 15 19 28 37 46
1800 5 8 10 14 16 25 33 41
2000 5 7 9 1215223037
CFM HEAT KIT NOM INAL kW
230/1/60 SUPPLY VOLTAGE - TEMP. RISE °F
Table 2
3568101519/2025
800 111822303554
1000 9 1418242842
1200 7 12152024354759
1400 6 10131720304051
1600 6 9 11 15 18 27 35 44
1800 5 8 10 13 16 24 31 39
2000 4 7 9 12 14 21 28 35
CFM HEAT KIT NOM INAL kW
220/1/60 SUPPLY VOLTAGE - TEMP. RISE °F
Table 3
3568101519/2025
800 1017212833
1000 8 1317222740
1200 7 11141922334556
1400 6 10121619293848
1600 5 8 10 14 17 25 33 42
1800 5 7 9 12 15 22 30 37
2000 4 7 8 11 13 20 27 33
CFM HEAT KIT NOMINAL kW
208/1/60 SUPPLY VOLTAGE - TEMP. RISE °F
Table 4
3 5 6 8 10 15 19 20 25
AVPTC25B14 550 650 700 800 850 875
AVPTC29B14 550 650 700 800 875 875
AVPTC35B14 550 650 700 800 875 1050
AVPTC37B14 550 650 700 800 875 1050
AVPTC33C14 600 700 750 875 950 950
AVPTC39C14 850 900 1000 1170 1345 1345
AVPTC49C14 1170 1170 1170 1170 1345 1345
AVPTC31C14 600 850 900 1000 1170 1345 1345
AVPTC37C14 850 900 1000 1170 1345 1345
AVPTC59C14 1170 1170 1170 1170 1345 1345
AVPTC37D14 1240 1240 1240 1240 1520 1520
AVPTC59D14 1240 1240 1240 1240 1520 1520
AVPTC49D14 1250 1300 1500 1550 1720
AVPTC61D14 1250 1300 1500 1550 1780 1850 1850
Model
HEATER (kW)
MINIMUM CFM REQUIREMENTS FOR HEATER KITS
Table 5
NOTE: 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 Spec Sheets and/or Service Manual for
more information.

10
12 Electrical and Control Wiring
IMPORTANT: All routing of electrical wiring must be made through
provided electrical knockouts. Do not cut, puncture or alter the
cabinet for electrical wiring.
12.1 Building Electrical Service Inspection
This unit is designed for single-phase electrical supply only.
DO NOT OPERATE ON A THREE-PHASE POWER SUPPLY. Mea-
sure 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.
Nominal Input Minimum Voltage Maximum Voltage
208-240 197 253
ELECTRICAL VOLTAGE
Table 6
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.
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
•Wire used must carry the Minimum Circuit Ampacity (MCA)
listed on the unit’s Series and 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
varying ampacities - be sure to check the temperature rat-
ing used.
Refer to the latest edition of the National Electric Code or
in Canada the Canadian Electric Code when determining
the correct 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 local or state codes for any special regional re-
quirements.
Protection can be in the form of fusing or HACR style circuit
breakers. The Series and Rating Plate provides the maxi-
mum overcurrent device permissible.
NOTE: Fuses or circuit breakers are to be sized larger than
the equipment MCA but not to exceed the MOP.
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
voltage 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
requirements. An NEC or CEC approved strain relief is to
be used at this entry point. Some codes/municipalities re-
quire the supply wire to be enclosed in conduit. Consult
your local codes.
Side of
Cabinet
Top of
Cabinet
KNOCK-OUT FOR ELECTRICAL CONNECTIONS
Figure 13
12.4.1 Air Handler Only (Non-Heat Kit Models)
The building supply connects to the stripped black and red
wires contained in the air handler electrical compartment
cavity. A ground screw is also contained in this area. 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.

11
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 plastic cover on the upper access panel
that will require either one or both sections to be removed
to allow the heat kit circuit breaker(s) to be installed. The
circuit breakers have lugs for power supply connection. See
the HKS Installation Instructions for further details.
12.5 Low Voltage Connections
Several combinations of low voltage schemes are possible,
depending on the presence of a heat kit and whether the
heat kit is single-stage or multi-stage, whether the outdoor
section is an air conditioner or heat pump, and whether
the system is setup with a communicating or traditional
thermostat. The 24V-control voltage connects the air han-
dler to the room thermostat and condenser. Low voltage
wiring must be copper conductors. A minimum of 18 AWG
must be used for installations up to 100 feet. Low voltage
wiring must be connected through the top of the cabinet
or either side. See the “Thermostat Wiring” section of this
manual for typical low voltage wiring connections.
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 in-
stallation, 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.
14 24 Volt Wiring
14.1 24 Volt Thermostat Wiring - Non-Communicating
Thermostat Connections
NOTE: Wire routing must not interfere with the circulator blower
operation or routine maintenance.
The air handler’s integrated control module provides terminals
for “Y1” and “Y2” and “W1” and “W2” thermostat connections.
This allows the air handler to support the systems shown in the
following table. Refer to the following figures for typical connec-
tions to the integrated control module. Thermostat wiring entrance
holes are located in the top of the blower. Wire routing must not
interfere with circulator blower operation or routine maintenance.
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.
COOLING HEAT PUMP HEATING ELECTRIC HEATING
1-STAGE ------ 1- or 2-STAGE
2-STAGE ------ 1- or 2-STAGE
1-STAGE 1-STAGE ------
2-STAGE 2-STAGE ------
1-STAGE 1-STAGE 1- or 2-STAGE
2-STAGE 2-STAGE 1- or 2-STAGE
Table 7
Air Handler Integrated
Control Module
Typical Single-Stage Cool,
Single-Stage Heat Thermostat
Dehumidistat
[Optional]
Remote Condensing Unit
(Single-Stage AC)
NEU
HOT
12RCG
W1 Y1 Y2
O
DEH UM
RCG
W1 Y1
RC
Y
Place Jumper Between Y1
and O for Proper
Dehumidification Operation
and Proper Ramping
Profile Operation
W2
Typical Single-Stage Cooling with Single-Stage Heating
Figure 14
Air Handler Integrated
Control Module
Typical Two-Stage Cool,
Two-Stage Heat Thermostat
Dehumidistat
[Optional]
Remote Condensing Unit
(Two-Stage AC)
NEU
HOT
12RCG
W1 W2 Y1 Y2
O
DEH UM
RCG
W1 W2 Y1 Y2
RC
Y1 Y2
Place Jumper Between Y1
and O for Proper
Dehumidification Operation
and Proper Ramping
Profile Operation
Typical Two-Stage Cooling with Two-Stage Heating
Figure 15
12RC
A
ir Handler
Integrated Control Module
Typical Single-Stage Cool,
Single-Stage Heat
Heat Pump Thermostat
Dehumidistat
[Optional]
G
W1 W2 Y1 Y2
O
DEH UM
Remote Condensing Unit
(Single-Stage HP)
NEU
HOT
W/E
RCG
Y1
O
RC
W1 Y
O
Typical Single-Stage Heat Pum
with Auxiliary/Emergency Heating
Figure 16

12
15 Auxiliary Alarm Switch
The control is equipped with two Auxiliary Alarm terminals la-
beled CAS which can be utilized with communicating mode setups
(typically used for condensate switch wiring but could be used
with compatible C02sensors or fire alarms).
Legacy mode use
In a legacy system (Non-communicating), this feature is not op-
erational. Any auxiliary alarm switch must be used to interrupt
the Y1 signal either to the indoor or outdoor unit.
Communication mode use
This feature can be activated or deactivated through the ther-
mostat user menus. An auxiliary alarm switch must be normally
closed and open when the base pan’s water level in the evapo-
rator coil reaches a particular level. The control will respond by
turning off the outdoor compressor and display the proper fault
codes. If the switch is detected closed for 30 seconds, normal
operation resumes and the error message will be removed.
CAS
SWITCH
Figure 19
16 AVPTC 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 motor mount
and rotate motor as shown in the AVPTC Motor Orientation figure
below. Be sure motor is oriented with the female connections on
the casing down. If the motor is not oriented with the connec-
tions down, water could collect in the motor and may cause pre-
mature failure.
FEMALE CONNECTIONS
SIDE VIEW
W
A
RNING
SOFTW
A
REVER.
TOP
FRONT VIEW
AVPTC Motor Orientation
Figure 20
12RC
A
ir Handler
Integrated Control Module
Typical Two-Stage Cool,
Two-Stage Heat
Heat Pump Thermostat
Dehumidistat
[Optional]
G
W1 W2 Y1 Y2
O
DEH UM
Remote Condensing Unit
(Two-Stage HP)
NEU
HOT
W/E
RCG
W2 Y1 Y2
O
RC
W1 Y1 Y2
O
Typical Two Stage Heat Pump Heating
and Auxiliary/Emergency Heating
Figure 17
14.2 24 Volt Dehumidistat Wiring - Non-Communicating
Thermostat Connections
The optional usage of a dehumidistat allows the air handler’s cir-
culator blower to operate at a slightly lower speed during a com-
bined thermostat call for cooling and dehumidistat call for dehu-
midification. This lower blower speed enhances dehumidification
of the conditioned air as it passes through the AC coil. For proper
function, a dehumidistat applied to this air handler must operate
on 24 VAC and utilize a switch which opens on humidity rise.
To install/connect a dehumidistat:
1. Turn OFF power to air handler.
2. Secure the dehumidistat neutral wire (typically the white
lead) to the screw terminal marked “DEHUM” on the air
handler’s integrated control module.
3. Secure the dehumidistat hot wire (typically the black lead)
to the screw terminal marked “R” on the air handler’s inte-
grated control module.
4. Secure the dehumidistat ground wire (typically the green
lead) to the ground screw on the air handler. NOTE: Ground
wire may not be present on all dehumidistats.
5. To enable the dehumidification function, move the dehu-
midification dip switch (S7) from OFF to ON. See following
figure.
ON
OFF
Move to the
ON position
to enable
dehumidification
S5 S6 S7 S8
Dip Switches -
Dehumidification Enable
Figure 18
6. Turn ON power to air handler.

13
17 Circulator Blower
This air handler is equipped with a multi-speed circulator blower.
This blower provides ease in adjusting blower speeds. The Speci-
fication Sheet applicable to your model provides an airflow table,
showing the relationship between airflow (CFM) and external static
pressure (E.S.P.), for the proper selection of heating and cooling
speeds. The heating blower speed shipped is set at 21kW or 25kW,
and the cooling blower speed is set at “D”. These blower speeds
should be adjusted by the installer to match the installation re-
quirements so as to provide the correct electric heating CFM and
correct cooling CFM.
Use the CFM LED (green) to obtain an approximate airflow quan-
tity. The green CFM LED blinks once for each 100 CFM of airflow.
1. Determine the tonnage of the cooling system installed with
the air handler. If the cooling capacity is in BTU/hr divide it
by 12,000 to convert capacity to TONs.
Example: Cooling Capacity of 30,000 BTU/hr.
30,000/12,000 = 2.5 Tons
2. Determine the proper airflow for the cooling system. Most
cooling systems are designed to work with airflows between
350 and 450 CFM per ton. Most manufacturers recommend
an airflow of about 400 CFM per ton.
Example: 2.5 tons X 400 CFM per ton = 1000 CFM
The cooling system manufacturer’s instructions must be checked
for required airflow. Any electronic air cleaners or other devices
may require a specific airflow; consult installation instructions
of those devices for requirements.
3. Knowing the air handler model, locate the high stage cool-
ing airflow charts in the Specification Sheet applicable to your
model. Look up the cooling airflow determined in step 2
and find the required cooling speed and adjustment setting.
Example: An AVPTC31C14 air handler installed with a 2.5
ton air conditioning system. The airflow needed is 1000 CFM.
Looking at the cooling speed chart for AVPTC31C14, find the
airflow closest to 1000 CFM. A cooling airflow of 1000 CFM
can be attained by setting the cooling speed to “C” and the
adjustment to “0” (no adjustment).
4. Locate the blower speed selection DIP switches on the inte-
grated control module. Select the desired “cooling” speed
tap by positioning switches 1 and 2 appropriately. If airflow
adjustment is required, set dip switch S8 (trim enable) to ON
(trim enable default is off). Then select the desired “adjust”
tap by positioning switches S3 and S4 appropriately. Refer
to the following Airflow Adjust Taps figure for switch posi-
tions and their corresponding taps. Verify CFM by counting
the number of times the green CFM LED blinks, see page 13
for LED locations.
COM
TH
TR
DE
CAS
HUM
O
R
2
1
C
2
1
ST4
ST3
ST2
ST1
3A
C
Y2
24VAC
FUSE
W1W2
R
C
G
W1
W2
Y1
3
2
Dip Switches
Green CFM LED
Seven Segment
LED
Auxiliary
Alarms
Communicating Board
Figure 21

14
NOTE: Airflow blink codes are approximations of actual airflow. Airflows provided
are at 0.3 static.
TAPS1S2S3S4S5S6S12S13
A OFF OFF OFF OFF OFF OFF OFF OFF
B ON OFF ON OFF ON OFF ON OFF
C OFF ON OFF ON OFF ON OFF ON
D ONONONONONONON ON
A
B
C
D
SPEED SELECTION DIP SWITCHES
COOL
SELECTION
SWITCHES
ADJUST
SELECTION
SWITCHES
PROFILE
SELECTION
SWITCHES
CONTINUOUS
FAN
SPEED
PROFILES PRE-RUN SHORT-RUN OFF DELAY
---- ---- 60 SEC. / 100%
---- 30 SEC. / 50% 60 SEC. / 100%
TO SET AIRFLOW: (1)Select model and desired HIGHSTAGECOOLING
AIRFLOW. Determine the corresponding TAP (A, B, C, D). Set DIP switches S1
and S2 to the appropriate ON / OFFpositions.
(2)Select modeland installed electric heatersize. Set DIP switches S9, S10
and S11to the appropriate ON/ OFFpositions.
(3)If airflow adjustment is required, set TRIM ENABLESWITCH S8 to ON (OFF =
0% Trim) and set S3 and S4 to appropriate ON/ OFF positions. TAP A is +5%,
TAP B is - 5%, TAP C is +10%. TAP D is - 10%.
TO SET COMFORT MODE: Select desired Comfort Mode Profile. (see
profiles above). Set DIP switches S5 and S6 to appropriate ON / OFF positions.
DEHUMIDIFICATION: To enable, set DIP switch S7 to ON. Cooling airflowwill
be reduced to 85% of nominal value during cool call when DEHUM command is
present. To disable, set S7 to OFF.
CONTINUOUS FAN SPEED: Use DIP switches S12 and S13 to select one of
the 4 continuous fan speeds, TAP A is 25%, TAP B is 50%, TAP C is 75%, TAP
D is 100%.
NOTES:
1. Airflow data shown applies to legacy mode operation only. For a fully
communicating system, please see the outdoor unit's installation instruc tions for
cooling and heat pump airflow data. See ComfortNet System- Airflow
Consideration section for details.
2. Airflow blink codes are approximations of actualairflow.
---- 7.5 MI N. / 82% 60 SEC. / 100%
30 SEC. / 50% 7.5 MIN. / 82% 30 SEC. / 50%
Note: Airflow data shown applies to the electric heat only in either legacy mode or communicating mode operation
*Within thermostat user menu CTK0*communicating thermostat will display 20KW for OFF-OFF-ONdip switch selection, 21kW
for OFF-OFF-OFF dip swith s election.
NR - Not rated
†† For match up with a 3 ton outdoor unit
Airflow for 5kW up to 15kW heater kits shall be set to 1300 cfm speed tap ofON-OFF-ON
††† For match up with a 3.5 ton outdoor unit: Heater kit applicaƟon shall not exceed 20kW
Airflow for 5 kW up to 20kW heater kits shall be set to 1500 cfm speed tap of ON-OFF-OFF
MODEL Tap Low Stage High Stage
A 410 610
B 565 840
C 650 970
D 685 1020
A 375 610
B 545 795
C 630 930
D 740 1085
A 450 675
B 520 780
C 660 985
D 750 1115
A 665 990
B 770 1150
C 815 1215
D 910 1360
A 710 875
B 745 1225
C 880 1410
D 975 1595
A 595 870
B 705 1050
C 835 1260
D 870 1315
A 610 875
B 810 1225
C 940 140
D 1070 1595
A 590 865
B 700 1055
C 770 1210
D 885 1375
A 1040 1445
B 1260 1790
C 16330 1890
D 1395 1990
A 820 1195
B 895 1320
C 995 1460
D 1056 1530
A 1080 1630
B 1210 1820
C 1280 1925
D 1350 2025
Cooling/Heat Pump Airflow Table
AVPTC33C14
AVPTC39C14
AVPTC49C14
AVPTC25B14
AVPTC35B14
AVPTC29B14
AVPTC37B14
AVPTC31C14
AVPTC37C14
AVPTC59C14
AVPTC37D14
AVPTC59D14
AVPTC49D14
AVPTC61D14
DIP SWITCH SETTING & AIRFLOW TABLE FOR ELECTRIC HEAT
HTR KW S9 S10 S11 AVPTC25B14 AVPTC29B14 AVPTC35B14
AVPTC37B14 AVPTC33C14 AVPTC39C14 AVPTC49C14 AVPTC37C14 AVPTC59C14 AVPTC37D14 AVPTC59D14 AVPTC49D14 II AVPTC61D14 III AVPTC31C14
3ONONON
550 550 550 600 600
5ONONOFF
650 650 650 700 850 1170 850 1170 1240 1240 1250 1250 850
6ONOFFON
700 700 700 750 900 1170 900 1170 1240 1240 1300 1300 900
8ONOFFOFF
800 800 800 875 1000 1170 1000 1170 1240 1240 1500 1500 1000
10 OFF ON ON 850 875 875 950 1170 1170 1170 1170 1240 1240 1550 1550 1170
15 OFF ON OFF 875 875 1050 950 1345 1345 1345 1345 1520 1520 1720 1780 1345
19* OFF OFF ON 1345 1345 1345 1345 1345
20 OFF OFF ON 1520 1520 1850
21 OFF OFF OFF
25* OFF OFF OFF 1850

15
12
13
12
13
12
13
12
13
OFF OFF OFF OFFON ON ON ON
25% 50%*
Fan Only Selection (*indicates factory setting)
75% 100%
S12
S13
S12
S13
S12
S13 S13
OFF OFF OFF OFFON ON ON ON
Fan Only Selection (*indicates factory setting)
Figure 24
• Profile A provides only an OFF delay of one (1) minute at
100% of the cooling demand airflow.
OFF
100% CFM 100% CFM
1 min
OFF
Figure 26
• Profile B ramps up to full cooling demand airflow by first
stepping up to 50% of the full demand for 30 seconds. The
motor then ramps to 100% of the required airflow. A one
(1) minute OFF delay at 100% of the cooling airflow.
50% CFM
1/2 min
100% CFM 100% CFM
1 min
OFF OFF
Figure 27
• Profile C ramps up to 82% of the full cooling demand air-
flow and operates there for approximately 7 1/2 minutes.
The motor then steps up to the full demand airflow. Profile
C also has a one (1) minute 100% OFF delay.
100% CFM
OFF OFF
Figure 28
5. Continuous fan speeds that provide 25, 50, 75, and 100% of
the air handler’s maximum airflow capability are selectable
via dip switches S12 and S13.
If the air handler’s maximum airflow capability is 2000 CFM
and 25% continuous fan speed is selected, the continuous
fan speed will be 0.25 x 2000 CFM = 500 CFM.
6. The multi-circulator blower also offers several custom ON/
OFF ramping profiles. These profiles may be used to enhance
cooling performance and increase comfort level. The ramp-
ing profiles are selected using DIP switches 5 and 6. Refer to
the following Dip Switches - Cooling Airflow Ramping Pro-
files figure for switch positions and their corresponding taps.
Refer to the bullet points below for a description of each
ramping profile. Verify profile selection by counting the
green CFM LED blinks and timing each step of the ramping
profile.
S1
S2
S1
S2
S1
S2
S1
S2
OFF OFF OFF OFFON ON ON ON
Ta p A Ta p B
Cooling Airflow Speed Tap (*indicates factory setting)
Tap C Tap D*
Figure 22
S3
S4
OFF OFF OFF OFFON ON ON ON
+5% -5%
Airflow Adjust Taps (*indicates factory setting)
+10% -10%
S3
S4
S3
S4
S3
S4
Dip Switches -
Cooling Airflow and Airflow Adjust Taps
Figure 23
NOTE: Upon start up in communicating mode the circuit board may display an “Ec” error. This is an indication that the dip switches
on the control board need to be configured in accordance with the Electric Heating Airflow Table. Configuring the dip switches
and resetting power to the unit will clear the error code.
Within the thermostat user menu, CTK0* communicating thermostat will display 20 kW for OFF-OFF-ON dip switch selection and
21 kW for OFF-OFF-OFF dip switch selection.
S9
S10
OFF OFF OFF OFFON ON ON ON
21 kW* or
25 kW*
19 kW or
20 kW
Electric Heating Airflow (*indicates factory setting)
15 kW 10 kW
OFF OFF OFF OFFON ON ON ON
8 kW 6 kW 5 kW 3 kW
S11
S9
S10
S11
S9
S10
S11
S9
S10
S11
S9
S10
S11
S9
S10
S11
S9
S10
S11
S9
S10
S11
Figure 25

16
• Profile D ramps up to 50% of the demand for 1/2 minute,
then ramps to 82% of the full cooling demand airflow and
operates there for approximately 7 1/2 minutes. The mo-
tor then steps up to the full demand airflow. Profile D has a
1/2 minute at 50% airflow OFF delay.
OFF
OFF
Figure 29
S5
S6
S5
S6
S5
S6
S5
S6
OFF OFF OFF OFFON ON ON ON
Tap A* Tap B Tap C Tap D
Dip Switches - Cooling Airflow Ramping Profiles
Figure 30
7. If an electric heater kit has been installed, determine the
heater kilowatt (kW) rating. Using the Electric Heat Airflow
table on page 14, set dip switches 9, 10, and 11 for the in-
stalled heater. The adjust setting (already established by the
cooling speed selection) also applies to the electric heater
kit airflow. Thus, the electric heater airflow is adjusted by
the same amount. This does not apply to systems setup with
a communicating thermostat. See Set-Up section in the AIR
HANDLER ADVANCED FEATURES MENU on page 21. Verify selected
CFM by counting the green CFM LED blinks.
If an electric heater kit has not been installed, set dip switches
9, 10, and 11 to any valid heater kit setting (see airflow table
for valid settings). This will prevent an Ec Error code from
being displayed.
NOTE: For installations not indicated in the preceding Temperature
Rise Tables, 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
Voltage Correction =.96 (230 Supply Volts)
=.92 (220 Supply Volts)
=.87 (208 Supply Volts)
1.08 = Constant
CFM = Measured Airflow
NOTE: The Temperature Rise Tables can also be used to determine
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 room air temperature.
Use HKR specification sheets to determine the HKR available for a
given air handler.
18 Heat Kit Selection
For heat kit selection, see the Specification Sheet for each
specific Air Handler.
19 Troubleshooting
19.1 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 dam-
age. By putting the air handler, the control, and the person at
the same electrostatic potential, these steps will help avoid ex-
posing the integrated control module to electrostatic discharge.
This procedure is applicable to both installed and uninstalled (un-
grounded) blowers.
HIGH VOLTAGE!
T O AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK , DISCONNECT ELECTRICAL POWER
BEFORE PERFORMING ANY SERVICE OR MAINTENANCE .
WARNING
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.
19.2 Diagnostic Chart
Refer to the Troubleshooting Chart at the end of this manual for
assistance in determining the source of unit operational prob-
lems. 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 Figure 31.
7 Segment
Diagnostic
Display
Figure 31

17
19.3 FaultRecall
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. The control must be in Standby
Mode (no thermostat inputs) to use the feature. Depress the
push-button for approximately two seconds and less than five sec-
onds. The LED display will then display the six most recent faults
beginning with the most recent fault and decrementing to the
least recent fault. The faults may be cleared by depressing the
button for greater than five seconds.
NOTE: Consecutively repeated faults are displayed 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.
20 ComfortNet™ System
20.1 Overview
The ComfortNet system is a system that includes a ComfortNet
compatible air handler and air conditioner or heat pump with a
CTK0* thermostat. Any other system configurations are consid-
ered invalid ComfortNet systems and must be connected as a tra-
ditional (or non-communicating) system (see the 24 VOLT THERMO-
STAT WIRING - NON-COMMUNICATING THERMOSTAT CONNECTIONS section for
details).
A ComfortNet heating/air conditioning system differs from a non-
communicating/traditional system in the manner in which the in-
door 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 in that the indoor and outdoor units
typically do not return information to the thermostat.
On the other hand, the indoor unit, outdoor unit, and thermostat
comprising a ComfortNet system “communicate” digitally with
one another. It is now a two-way communications path. The
thermostat still sends commands to the indoor and outdoor units.
However, the thermostat may also request and receive informa-
tion 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 thermo-
stat and subsystems (indoor/outdoor unit) and between sub-
systems 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 subsystem controls are powered with
24 VAC Thus, a maximum of 4 wires between the equipment and
thermostat is all that is required to operate the system.
20.1 Airflow Consideration
Airflow demands are managed differently in a fully communicat-
ing system than they are in a non-communicating wired system.
The system operating mode (as determined by the thermostat)
determines which unit calculates the system airflow demand. If
the indoor unit is responsible for determining the airflow de-
mand, 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 motor. The table below lists the
various ComfortNet systems, the operating mode, and airflow de-
mand 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 cool-
ing airflow demand to the air handler. Once received, the air han-
dler will send the low stage cooling airflow demand to the ECM
motor. The ECM motor then delivers the low stage cooling air-
flow. 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 CTK0* thermostat provides the
airflow demand. Depending on which CTK0* thermostat has been
installed three or four continuous fan speeds may be available. If
the thermostat provides three speeds (low, medium, high) they
correspond to 25%, 50% and 75%, respectively, of the air handlers’
maximum airflow capability. If the thermostat provides four
continuous fan speeds then a 100% airflow option is added.
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.
Sys te m Sys te m
Operating Mode
Airflow Dem and
Source
Cooling Air Conditioner
Heating Air Handler
Continuous Fan Thermostat
Cooling Heat Pump
Heat Pump Heating
Only Heat Pump
HP + Electric Heat
Strips
> of Heat Pump or Air
Handler Demand
Electric Heat Strips
Only Air Handler
Continuous Fan Thermostat
Air Conditioner +
Air Handler
Heat Pump + A ir
Handler
Figure 32

18
20.2 Control Wiring
NOTE: Refer to section Electrical Connections for 208/230 volt
line connections to the air handler.
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 system
components. One hundred and fifty (150) feet is the maximum
length of wire recommended between indoor unit and outdoor
unit, or between indoor unit and thermostat.
Only the data lines 1 and 2 are required between the indoor and
outdoor units. A 40VA, 208/230 VAC to 24 VAC transformer must
be installed in the outdoor unit to provide 24 VAC power to the
outdoor unit’s electronic control. See kit instructions for mount-
ing and wiring instructions.
1
2
R
C
1
2
R
C
1
2
R
C
CTK04
20.4 ComfortNet™ System Advanced Features
The ComfortNet system permits access to additional system in-
formation, advanced set-up features, and advanced diagnostic/
troubleshooting features. These advanced features are organized
into a menu structure. See the AIR HANDLER ADVANCED FEA-
TURES MENU section for layout of menu shortcuts.
20.5 Diagnostics
Accessing the air handler’s diagnostics menu provides ready
access to the last six faults detected by the air handler. Faults
are stored most recent to least recent. Any consecutively re-
peated fault is stored a maximum of three times. Example: A
clogged return air filter causes the air handler’s motor to repeat-
edly entera 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.
20.6 Network Troubleshooting
The ComfortNet system is a fully communicating system, and
thus, constitutes a network. Occasionally the need to trouble-
shoot the network may arise. The integrated air handler control
has some on-board tools that may be used to troubleshoot the
network. These tools are: red communications LED, green re-
ceive (Rx) LED, and learn button. Refer to the Communications
Troubleshooting Chart at the end of this manual for error codes,
possible causes and corrective actions.
• Red communications LED – Indicates the status of the net-
work. The table below indicates the LED status and the
corresponding potential problem.
• Green receive LED – Indicates network traffic. The
COMMUNICATIONS TROUBLESHOOTING CHART indicates
the LED status and the corresponding potential problem.
• Learn button – Used to reset the network. Depress the
button for approximately 2 seconds to reset the network.
20.7 SystemTroubleshooting
NOTE: Refer to the instructions accompanying the ComfortNet
compatible outdoor AC/HP unit for 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.

19
21 Start-Up Procedure
• Prior to start-up, ensure that all electrical connections are
properly sized and tightened.
• All panels must be in place and secured. For Air Tight appli-
cation, neoprene gasket must be positioned at prescribed
locations to achieve low airflow as stated in section 13.
• Tubing must be leak free.
• Unit should be elevated, trapped and pitched to allow for
drainage.
• Low voltage wiring is connected.
• Auxiliary drain is installed when necessary and pitched to
allow for drainage.
• Drain pan and drain tubing has been leak checked.
• Return and supply ducts are sealed.
• Unit is elevated when installed in a garage or where flam-
mable vapors may be present.
• Unit is protected from vehicular or other physical damage.
• Return air is not obtained from any areas where there may
be objectionable odors, flammable vapors or products of
combustion such as carbon monoxide (CO), which may
cause serious personal injury or death.
22 Regular Maintenance
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.
The only item to be maintained on a regular basis by the user is
the circulating air filter(s). Filter should be cleaned or replaced
regularly. A certified service technician must perform all other
services.
NOTE: THESE INSTRUCTIONS ARE SPECIFICALLY FOR AVPTC
MODELS. DO NOT USE THESE DIAGRAMS FOR ANY OTHER MODELS.
SEE SEPARATE INSTALLATION AND OPERATING INSTRUCTIONS
FOR ATUF, ARUF, ARPT, ADPF, AND ASPF MODELS.
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.

20
LED LED
Status
Indication Possible Causes Corrective Action(s) Notes & Cautions
Red
Communications
LED
Off •Normal condition •None •None •None
1 Flash •Communications
Failure
•Communications
Failure
•Depress Learn Button
•Verify that bus BIAS
and TERM
dipswitches are in the
ON position.
•Depress once
quickly for a power-
up reset
•Depress and hold
for 2 seconds for
an out-of-box reset
2 Flashes •Out-of-box reset •Control power up
•Learn button
depressed
•None •None
Green Receive
LED
Off •No power
•Communications
error
•No power to air
handler
•Open fuse
•Communications error
•Check fuses and
circuit breakers;
replace/reset
•Replace blown fuse
•Check for shorts in
low voltage wiring in
air handler/system
•Reset network by
depressing learn
button
•Check data 1/ data 2
voltages
•Turn power OFF
prior to repair
1 Steady
Flash
•No network found •Broken/ disconnected
data wire(s)
•Air handler is installed
as a legacy/ traditional
system
•Check
communications
wiring (data 1/ data 2
wires)
•Check wire
connections at
terminal block
•Verify air handler
installation type
(legacy/ traditional or
communicating)
•Check data 1/ data 2
voltages
•Turn power OFF
prior to repair
•Verify wires at
terminal blocks are
securely twisted
together prior to
inserting into
terminal block
•Verify data1 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 and data 2
wires reversed at air
handler, thermostat,
or CT™ compatible
outdoor AC/HP
•Short between data 1
and data 2 wires
•Short between data 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 data 1/ data 2
voltages
•Turn power OFF
prior to repair
•Verify wires at
terminal blocks are
securely twisted
together prior to
inserting into
terminal block
•Verify data1 and
data voltages as
described above
23 Communications Troubleshooting Chart