Amana APG 16 M Series User manual
Prior to installation, thoroughly familiarize yourself with this
Installation Manual. Observe all safety warnings. During in-
stallation 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.
Ax this manual and Users Information
Manual adjacent to the unit.
19001 Kermier Rd., Waller, TX 77484
www.goodmanmfg.com • www.amana-hac.com
©2015-2019, 2021 Goodman Manufacturing Company, L.P.
is a registered trademark of Maytag corporation or its related companies and is used under license. All rights reserved.
These installation instructions cover the installation
of single package heating and cooling units. See the
Specication Sheet applicable to your model for information
regarding accessories.
Please contact your distributor or our website for
the applicable Specication Sheet referred to in this manual.
This Forced Air Central Unit Design complies with re-
quirements embodied in The American National Standard /
National Standard of Canada shown below:
“IMPORTANT - This product has been designed and manufactured to meet ENERGY STAR®
criteria for energy eciency when matched with appropriate coil components. However,
proper refrigerant charge and proper air ow are critical to achieve rated capacity and
eciency. Installation of this product should follow the manufacturer’s refrigerant charging
and air ow instructions.
”
IOA-3012F
05/2021
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3
When reporting shortages or damages, or ordering repair
parts, give the complete unit model and serial numbers as
stamped on the unit’s nameplate.
Replacement parts for this appliance are available through
your contractor or local distributor. Your nearest distributor
can be located online at
or by contacting:
HOMEOWNER’S SUPPORT
GOODMAN COMPANY, L.P.
19001 KERMIER ROAD
WALLER, TX 77484
855-770-5678
Before installing this unit, please read this manual to famil-
iarize yourself on the specic items which must be adhered
to, including maximum external static pressure to unit, air
temperature rise, minimum or maximum CFM and motor
speed connections.
A warranty certicate is provided with the unit. Read the war-
ranty carefully and note what is covered. Keep the warranty
certicate in a safe place so you can nd it when necessary.
Keep this literature in a safe place for future reference.
4
RISQUE D’INCENDIE OU D’EXPLOSION
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AMAIS
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LESSURES
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ATÉRIELS
.
CARBON MONOXIDE POISONING HAZARD
Failure To Follow The Steps Outlined Below For Each Appliance
Connected To The Venting System Being Placed Into Operation
Could Result In Carbon Monoxide Poisoning Or Death. The
Following Steps Shall Be Followed For Each Appliance Connected
To The Venting System Being Placed Into Operation, While All
Other Appliances Connected To The Venting System Are Not In
Operation:
1) Seal Any Unused Openings In The Venting System.
2) Inspect The Venting System For Proper Size And Horizontal
Pitch, As Required In The National Fuel Gas Code, Ansi
Z223.1/nfpa 54 Or The Natural Gas And Propane Installation Code,
Csa B149.1 And These Instructions. Determine That There Is No
Blockage Or Restriction, Leakage, Corrosion And Other
Deficiencies Which Could Cause An Unsafe Condition.
3) As Far As Practical, Close All Building Doors And Windows And
All Doors Between The Space In Which The Appliance(s)
Connected To The Venting System Are Located And Other Spaces
Of The Building.
4) Close Fireplace Dampers.
5) Turn On Clothes Dryers And Any Appliance Not Connected To
The Venting System. Turn On Any Exhaust Fans, Such As Range
Hoods And Bathroom Exhausts, So They Are Operating At
Maximum Speed. Do Not Operate A Summer Exhaust Fan.
6) Follow The Lighting Instructions. Place The Appliance Being
Inspected Into Operation. Adjust The Thermostat So Appliance Is
Operating Continuously.
7) Test For Spillage From Draft Hood Equipped Appliances At The
Draft Hood Relief Opening After 5 Minutes Of Main Burner
Operation. Use The Flame Of A Match Or Candle.
8) If Improper Venting Is Observed During Any Of The Above Tests,
The Venting System Must Be Corrected In Accordance With The
National Fuel Gas Code, Ansi Z223.1/nfpa 54 And/or Natural Gas
And Propane Installation Code, Csa B149.1.
9) After It Has Been Determined That Each Appliance Connected
To The Venting System Properly Vents When Tested As Outlined
Above, Return Doors, Windows, Exhaust Fans, Fireplace Dampers
And Any Other Gas-fired Burning Appliance To Their Previous
Conditions Of Use.
RISQUE D’INTOXICATION AU MONOXYDE DE CARBONE
Si les étapes décrites ci-dessous ne sont pas suivies pour chacun
des appareils raccordés au système de ventilation au moment
de sa mise en marche, cela peut entraîner une intoxication au
monoxyde de carbone ou la mort. Les étapes suivantes doivent
être suivies pour chacun des appareils raccordés au système de
ventilation au moment de sa mise en marche, alors que tous les
autres appareils raccordés au système de ventilation ne sont
pas en marche:
1) Sceller toutes les ouvertures inutilisées du système de
ventilation.
2) Inspecter le système de ventilation afin de vérifier si la taille
et l’inclinaison par rapport à l’horizontale sont conformes aux
exigences du National Fuel Gas Code, ANSI Z223.1/NFPA 54 ou
du Code d’installation du gaz naturel et du propane, CSA B149.1
et à ces instructions. Vérifier qu’il n’y pas d’obstruction ou de
pourraient entraîner une situation dangereuse.
3) Si possible, fermer toutes les portes et fenêtres du bâtiment
ainsi que toutes les portes séparant l’endroit où se trouvent les
appareils raccordés au système de ventilation et less autres
zones du bâtiment.
4) Fermer le registre des foyers.
5) Mettre les sécheuses en marche ainsi que tous les autres
appareils qui ne sont pas raccordés au systéme de ventilation.
Mettre en marche tous les ventilateurs de tirage, comme celui
des hottes de cuisine et des salles de bains, et les régler à la
puissance maximale. Ne pas mettre en marche les ventilateurs
d’été.
6) Suivre les instructions d’allumage. Mettre en marche
l’appareil soumis à l’inspection. Régler le thermostat de manièr
à ce que l’appareil fonctionne en continu.
7) Vérifier la présence de fuite au niveau de l’ouverture du
coupe-tirage des appareils qui en sont dotés après 5 minutes de
fontionnement du brûleur principal. Utiliser la flamme d’une
allumette ou d’une bougie.
8) Si un problème de ventilation est observé pendant l’un des
essaid décrits ci-dessus, des correctifs doivent être apportés au
système de ventilation conformé National Fuel Gas Code, Ansi
Z223.1/nfpa 54 And/or Natural Gas And Propane Installation
Code, Csa B149.1.
9) Une fois qu’il été déterminé que chaque appareil raccordé au
système de ventilation fontionne correctement au moyen des
essais décrits ci-dessus, les portes, les fenêtres, les ventilateurs,
les registres de foyer et tous les autres appareils de combustion
alimentés au gaz doivent être remis dans leur état initial.
5
Rated performance is achieved after 20 hours of operation.
Rated performance is delivered at the specied airow. See
outdoor unit specication sheet for split system models or
product specication sheet for packaged and light commer-
cial models. Specication sheets can be found at www.ama-
na-hac.com for Amana®brand products. Within the website,
please select the residential or commercial products menu
and then select the submenu for the type of product to be
installed, such as air conditioners or heat pumps, to access
a list of product pages that each contain links to that model’s
specication sheet.
To assure that your unit operates safely and eciently, it
must be installed, operated, and maintained in accordance
with these installation and operating instructions, all local
building codes and ordinances, or in their absence, with the
latest edition of the National Fuel Gas Code NFPA 54/ANSI
Z223.1 and National Standard of Canada CAN/CSA B149
Installation Codes.
The heating and cooling capacities of the unit should be
greater than or equal to the design heating and cooling loads
of the area to be conditioned. The loads should be calculated
by an approved method or in accordance with A.S.H.R.A.E.
Guide or Manual J - Load Calculations published by the Air
Conditioning Contractors of America.
B10259-216
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.
B10259-216
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.
B10259-216
RISQUE D'EMPOISONNEMENT AU MONOXYDE DE CARBONE
Le monoxyde de
des
carbone peut causer des maladies graves telles que
dommages permanents au cerveau et meme la mort.
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.
Obtain from:
American National Standards Institute
25 West 43rd Street, 4th Floor
New York, NY 10036
Check the carton upon arrival for external damage. If dam-
age is found, a request for inspection by carrier agent should
be made in writing immediately.
Carefully inspect the unit for damage including damage to
the cabinetry. Any bolts or screws which may have loosened
in transit must be re-tightened. In the event of damage, the
receiver should:
1. Make notation on delivery receipt of any visible
damage to shipment or container.
2. Notify carrier promptly and request an inspection.
3. In case of concealed damage, carrier should be
notied as soon as possible-preferably within 5 days.
4. File the claim with the following supporting documents:
a. Original Bill of Lading, certied copy, or indemnity
bond.
b. Original paid freight bill or indemnity in lieu thereof.
c. Original invoice or certied copy thereof, showing
trade and other discounts or reductions.
d. Copy of the inspection report issued by carrier
representative at the time damage is reported to
the carrier. The carrier is responsible for making
prompt inspection of damage and for a thorough
investigation of each claim. The distributor or
manufacturer will not accept claims from dealers
for transportation damage.
When inspecting the unit for transportation damage,
remove all packaging materials. Recycle or dispose of the
packaging material according to local codes.
6
Remove wood shipping rails prior to
installation of the unit.
• For proper ame pattern within the heat exchanger
and proper condensate drainage, the unit must be
mounted level.
• The ue outlet hood must be at least 12 inches from
any opening through which ue gases could enter
a building, and at least three feet above any forced
air inlet located within ten feet. The economizer/
manual fresh air intake/motorized fresh air intake
and combustion air inlet mounted on the unit are not
aected by this restriction.
• To avoid possible corrosion of the heat exchanger,
do not locate the unit in an area where the outdoor
air (i.e. combustion air for the unit) will be frequently
contaminated by compounds containing chlorine or
uorine. Common sources of such compounds include
swimming pool chemicals and chlorine bleaches, paint
stripper, adhesives, paints, varnishes, sealers, waxes
(which are not yet dried) and solvents used during
construction and remodeling. Various commercial and
industrial processes may also be sources of chlorine/
uorine compounds.
• To avoid possible illness or death of the building
occupants, do NOT locate outside air intake device
(economizer, manual fresh air intake, motorized
fresh air intake) too close to an exhaust outlet, gas
vent termination, or plumbing vent outlet. For specic
distances required, consult local codes.
• Allow minimum clearances from the enclosure for re
protection, proper operation, and service access (see
appendix). These clearances must be permanently
maintained.
• The combustion air inlet and ue outlet hoods on the
unit must never be obstructed. If used, do not allow
the economizer/manual fresh air damper/ motorized
fresh air damper to become blocked by snow or debris.
In some climates or locations, it may be necessary to
elevate the unit to avoid these problems.
• When the unit is heating, the temperature of the return
air entering the unit must be between 50° F and 100° F.
• Units manufactured on or after May 1, 2017 are not
permitted to be used in Canada for heating of buildings
or structures under construction.
• When the unit is installed on the ground adjacent
to the building, a level concrete (or equal) base is
recommended. Prepare a base that is 3” larger than
the package unit footprint and a minimum of 3” thick.
• The base should also be located where no runo of
water from higher ground can collect in the unit.
To ensure proper condensate drainage, unit must be
installed in a level position.
•To avoid possible property damage or personal injury,
the roof must have sucient structural strength to
carry the weight of the unit(s) and snow or water
loads as required by local codes. Consult a structural
engineer to determine the weight capabilities of the
roof.
• The unit may be installed directly on wood oors or on
Class A, Class B, or Class C roof covering material.
• To avoid possible personal injury, a safe, at surface
for service personnel should be provided.
• Sucient structural support must be determined prior
to locating and mounting the curb and package unit.
• Ductwork must be constructed using industry
guidelines. The duct work must be placed into the
roof curb before mounting the package unit.
• Curb insulation, cant strips, ashing and general
roong material are furnished by the contractor.
7
If using bottom discharge with roof
curb, ductwork should be attached to the curb prior to install-
ing the unit. Ductwork dimensions are shown in roof curb
installation instructions.
Refer to the Roof Curb Installation Instructions for proper
curb installation. Curbing must be installed in compliance
with the National Roong Contractors Association Manual.
Lower unit carefully onto roof mounting curb. While rigging
unit, center of gravity will cause condenser end to be lower
than supply air end.
: This unit is factory set to operate on natural
gas at the altitudes shown on the rating plate.
The rating plate is stamped with the model number, type of
gas and gas input rating. Make sure the unit is equipped to
operate on the type of gas available. Conversion to LP gas is
permitted with the use of a factory authorized conversion kit.
Contact your distributor or refer to the specication sheet for
your model for a listing of approved LP gas conversion kit(s).
Refer to the Installation Manual provided with the LP kit for
conversion from natural gas to propane gas.
Natural Min. 5.0" W.C., Max. 10.0" W.C.
Propane Min. 11.0" W.C., Max. 13.0" W.C.
Inlet Gas Pressure Must Be Within the Minimum and Maxi-
mum Value Shown in Table Above.
The minimum supply pressure should not vary from that
shown in the Inlet Gas Pressure table because this could
prevent the unit from having dependable ignition. In addition,
gas input to the burners must not exceed the rated input
shown on the rating plate. Overring of the unit could result
in premature heat exchanger failure.
Installation of this furnace at altitudes above 2000 ft (610 m)
shall be made in accordance with the Listed High Altitude
Conversion Kit available with this furnace.
D’installation de ce générateur de chaleur à des altitudes
supérieures à 2000 pi (610 m) doit être eectuée conformé-
ment aux instructions accompagnant la trousse de conver-
sion pour haute altitude fournie avec cet appareil.
The gas/electric units naturally derate
with altitude. Do not attempt to increase the r ing rate by
changing orices or increasing the manifold pressure. This
can cause poor combustion and equipment failure. At all alti-
tudes, the manifold pressure must be within 0.3 inches W.C.
of that listed on the nameplate for the fuel used. At all alti-
tudes and with either fuel, the air temperature rise must be
within the range listed on the unit nameplate. Contact your
distributor or refer to the specication sheet for your model
for listing of approved high altitude conversion kit(s). Refer
to the Installation Manual provided with the high altitude kit
for altitude adjustments.
No changes are required up to 2,000 feet. Use the
appropriate high altitude kit above 2,000 feet.
8
To avoid possible unsatisfactory opera-
tion or equipment damage due to under ring of equipment,
do not undersize the natural/propane gas piping from the me-
ter/tank to the unit. When sizing a trunk line, include all appli-
ances on that line that could be operated simultaneously.
The rating plate is stamped with the model number, type of
gas and gas input rating. Make sure the unit is equipped to
operate on the type of gas available. The gas line installa-
tion must comply with local codes, or in the absence of local
codes, with the latest edition of the National Fuel Gas Code
NFPA 54/ANSI Z223.1.
10 132 278 520 1050 1600
20 92 190 350 730 1100
30 73 152 285 590 980
40 63 130 245 500 760
50 56 115 215 440 670
60 50 105 195 400 610
70 46 96 180 370 560
80 43 90 170 350 530
90 40 84 160 320 490
100 38 79 150 305 460
Pressure = .50 PSIG or less and Pressure Drop of 0.3" W.C. (Based
on 0.60 Specific Gravity Gas)
Btuh Furnace Input
Calorific Value of Gas
Refer to the Proper Piping Practice drawing for the general
layout at the unit. The following rules apply:
1. Use black iron pipe and ttings for the supply piping.
The use of a ex connector and/or copper piping
is permitted as long as it is in agreement with local
codes.
2. Use pipe joint compound on male threads only. Pipe
joint compound must be resistant to the action of the
fuel used.
3. Use ground joint unions.
4. Install a drip leg to trap dirt and moisture before it can
enter the gas valve. The drip leg must be a minimum
of three inches long.
5. Use two pipe wrenches when making connection to
the gas valve to keep it from turning.
6. Install a manual shut-o valve in a convenient location
(within six feet of unit) between the meter and the unit.
7. Tighten all joints securely.
8. The unit must be connected to the building piping by
one of the following methods:
• Rigid metallic pipe and ttings
• Semirigid metallic tubing and metallic fittings
(Aluminum alloy tubing must not be used in exterior
locations)
• Listed gas appliance connectors used in accordance
with the terms of their listing that are completely in
the same room as the equipment
• In the prior two methods above the connector or
tubing must be protected from physical and thermal
damage. Aluminum alloy tubing and connectors
must be coated to protect against external corrosion
when in contact with masonry, plaster or insulation
or are subject to repeated wettings by liquids (water
- not rain water, detergents or sewage)
DRIP LEG
MANUAL
SHUT-OFF
VALVE
GROUND JOINT UNION
(INSTALLED AHEAD OF GAS VALVE)
GROMMET
The unit gas supply entrance is factory sealed with
plugs. Keep plugs in place until gas supply is ready to be
installed. Once ready, replace the plugs with the supplied
grommets and install gas supply line.
There will be air in the gas supply line after testing for leaks
on a new installation. Therefore, the air must be bled from
the line by loosening the ground joint union until pure gas is
expelled. Tighten union and wait for ve minutes until all gas
has been dissipated in the air. Be certain there is no open
ame in the vicinity during air bleeding procedure. The unit is
placed in operation by closing the main electrical disconnect
switch for the unit.
9
For Natural gas to LP gas conversion,
Conversion Kit “LPM-08” must be used. Consult your dealer
for appropriate conversion kit(s).
All propane gas equipment must conform to the safety stan-
dards of the National Board of Fire Underwriters (See NBFU
Manual 58).
For satisfactory operation, propane gas supply pressure
must be within 9.7 - 10.3 inches W.C. at the manifold with all
gas appliances in operation. Maintaining proper gas pres-
sure depends on three main factors:
1. Vaporization rate, which depends on (a) temperature
of the liquid, and (b) wetted surface area of the
container or containers.
2. Proper pressure regulation.
3. Pressure drop in lines between regulators, and
between second stage regulator and the appliance.
Pipe size required will depend on length of pipe run
and total load of all appliances.
Complete information regarding tank sizing for vaporization,
recommended regulator settings and pipe sizing is available
from most regulator manufacturers and propane gas suppliers.
Since propane gas will quickly dissolve white lead or most
standard commercial compounds, special pipe dope must
be used. Shellac base compounds resistant to the actions
of liqueed petroleum gases such as Gasolac®, Stalactic®,
Clyde’s®or John Crane®are satisfactory.
See Typical Propane Gas Piping gure for typical piping
arrangement.
Sizing Between First and Second Stage Regulator
Maximum Propane Capacities listed are based on 1 PSIG Pressure Drop at 10
PSIG Setting. Capacities in 1,000 BTU/HR
30 309 700 1,303 2,205 3,394 1,843 3,854
40 265 599 1,115 1,887 2,904 1,577 3,298
50 235 531 988 1,672 2,574 1,398 2,923
60 213 481 896 1,515 2,332 1,267 2,649
70 196 446 824 1,394 2,146 1,165 2,437
80 182 412 767 1,297 1,996 1,084 2,267
90 171 386 719 1,217 1,873 1,017 2,127
100 161 365 679 1,149 1,769 961 2,009
150 130 293 546 923 1,421 772 1,613
200 111 251 467 790 1,216 660 1,381
250 90 222 414 700 1,078 585 1,224
300 89 201 378 634 976 530 1,109
350 82 185 345 584 898 488 1,020
400 76 172 321 543 836 454 949
To convert to Capacities at 15 PSIG Settings -- Multiply by 1.130
To convert to Capacities at 5 PSIG Settings -- Multiply by 0.879
Sizing Between Single or Second Stage Regulator and Appliance*
Maximum Propane Capacities Listed are Based on 1/2" W.C. Pressure Drop at
11" W.C. Setting. Capacities in 1,000 BTU/HR
10 49 110 206 348 539 291 608 1,146 2,353 3,525
20 34 76 141 239 368 200 418 788 1,617 2,423
30 27 61 114 192 296 161 336 632 1,299 1,946
40 23 52 97 164 253 137 284 541 1,111 1,665
50 20 46 86 146 224 122 255 480 985 1,476
60 19 42 78 132 203 110 231 436 892 1,337
80 16 36 67 113 174 94 198 372 764 1,144
100 14 32 59 100 154 84 175 330 677 1,014
125 12 28 52 89 137 74 155 292 600 899
150 11 26 48 80 124 67 141 265 544 815
200 10 22 41 69 106 58 120 227 465 697
250 919 36 61 94 51 107 201 412 618
300 818 33 55 85 46 97 182 374 560
350 716 30 51 78 43 89 167 344 515
400 715 28 47 73 40 83 156 320 479
*DATA IN ACCORDANCE WITH NFPA PAMPHLET NO. 54
Mount the thermostat approximately ve feet above the
oor, in an area that has an inside, vibration-free wall and
has good air circulation.
Movement of air must not be obstructed by furniture, door,
draperies, etc. The thermostat must not be mounted where
10
it will be aected by drafts, hot or cold water pipes or air
ducts in walls, radiant heat from replace, lamps, the sun,
television, etc. Consult the Instruction Sheet packaged with
thermostat for mounting instructions.
All units have two stages of heating and two stages of me-
chanical cooling. Units which will have economizers may
use thermostats with two or three stages of cooling. All units
can use single stage or multi-stage thermostats. Refer to
gures later in this section for wiring.
The units are designed for operation on 60 hertz current and
at voltages as shown on the rating plate. All internal wiring
in the unit is complete. It is necessary to bring in the power
supply to the contactor as shown on the unit wiring diagram
which is supplied with each unit. The low voltage wiring must
be connected between the unit control panel and the room
thermostat.
R C W1W2 GY1 Y2
RY2
CY1
W1 G
W2
Integrated
Control Module
Thermostat
Two-Stage Heating
with
Two-Stage Cooling
5 MINUTE DELAY
PERIOD WITH
JUMPER IN THIS
POSITION
10 MINUTE DELAY
PERIOD WITH
JUMPER IN THIS
POSITION
To use a single stage thermostat, move jumper located to the
left of the terminal strip labeled “Stage Delay” from NONE to
“5” or “10” minutes. This selection will cause the control to
run on low stage for the selected time (5 or 10 minutes) then
shift to HIGH STAGE. This option controls both cooling and
heating modes. If the jumper is not moved, only low-stage
cool and low-stage heat will operate.
The APG16 models are equipped with ECM variable speed
motors. Two FAN ONLY speeds are possible with these mo-
tors. To utilize the LOW HEAT blower speed for FAN ONLY
operation, connect the wire from the thermostat’s G terminal
to the ignition control board’s G terminal.
To utilize the alternate FAN ONLY speed, connect the wire
from the thermostat’s G terminal to the unstripped green
wire in the control box. (DO NOT connect the thermostat’s
G terminal to the ignition control’s G terminal.) This alternate
FAN ONLY blower speed is approximately 75% of the HIGH
COOL speed.
The optional usage of a dehumidistat allows the unit’s cir-
culator blower to operate at a slightly lower speed (approx-
imately 80% of desired cooling speed) during a combined
thermostat call for cooling and dehumidistat call for dehu-
midication. This can be done through an independent de-
humidistat. This lower blower speed enhances dehumidi-
cation of the conditioned air as it passes through the air
conditioning coil. For proper function, a dehumidistat applied
to this package unit must operate on 24 VAC and utilize a
switch which opens on humidity rise. Refer to the unit wiring
diagram for additional wiring details.
To install/connect a dehumidistat:
1. Turn OFF power to unit.
2. To enable the dehumidify function, locate the ECM
blower motor interface module in the unit’s blower
section. Locate the jumper label “HUM” on the interface
module. Cut the jumper to enable dehumidication
(see ECM Blower Motor Interface Module).
3. Secure the dehumidistat neutral wire (typically the
white lead) to the gray, unstripped wire in the unit’s
control box.
4. Secure the dehumidistat low voltage wire (typically
the black lead) to the ignition control’s “R” terminal.
5. Secure the dehumidistat ground wire (typically the
green lead) to the ground screw to the unit’s sheet
metal control box.
: Ground wire may not be present on all
dehumidistats.
6. Turn ON power to unit.
11
Once the HUM jumper is cut at the ECM motor interface
module, the dehumidify function is enabled during a com-
bination call for cooling (T-Stat) and dehumidication (DE-
HUMStat).
5
Y1
1
SW ITCH
87654321
W1
OT1
OT2
HUM
PJ6
PJ2
PJ4
W2
CR9
HEATER
W1 W2 C R
24 VAC
CR8
CR7
CR6
J3
CR5
C2
4
1J2
CR2
DS1
CR1
R5
OFF
ON
DIP
E
F1 3 AMP
KESU
CR10
R3
PN . PC B001 0 2
(CFM)
CONFIGURATION.
DIP SWITCH
FOR PROPER
TO MANUAL
PLEASE REFER
R1
R2
EDW2OCOMYCONR
HEATPUMP
CONDENSER
OUTDOOR
THERMOSTATS HUMIDISTAT
HUMY/Y2GY1RCOT2OT1OTCOW/W2E\W1
J1
HUMPJ6
Refer to the unit wiring diagram for electrical connections.
When installed, the unit must be electrically grounded in ac-
cordance with local codes or in the absence of local codes,
with the National Electrical Code, ANSI/NFPA No. 70, and/or
the CSA C22.1 Electrical Code. Ensure low voltage connec-
tions are waterproof.
For unit protection, use a fuse or HACR circuit breaker that
is in excess of the circuit ampacity, but less than or equal
to the maximum overcurrent protection device. DO NOT
EXCEED THE MAXIMUM OVERCURRENT DEVICE SIZE
SHOWN ON UNIT DATA PLATE.
All line voltage connections must be made through weath-
erproof ttings. All exterior power supply and ground wiring
must be in approved weatherproof conduit. Low voltage
wiring from the unit control panel to the thermostat requires
coded cable. See below for ground level and rooftop wiring.
Note:Junction box location
shown is optional and is
for illustration purposes only.
JUNCTION BOX
The unit transformer is factory connected for 230V opera-
tion. If the unit is to operate on 208V, reconnect the trans-
former primary lead as shown on the unit wiring diagram.
The induced draft blower on some models is equipped with
a low speed 230V lead (blue) and a low speed 208V lead
(black). If equipped, connect the induced draft blower low
speed 208V lead (black) in place of the low speed 230V lead
(blue). Place the unused 230V lead on the “PARK” terminal
located on ignition control.
15 20 25 30 35 40 45 50
6 4 4 4 3 3 2 2
8 6 6 4 4 4 3 3
10 8 8 6 6 6 4 4
14 12 10 10 8 8 6 6
12
Units can easily be converted from horizontal to down-dis-
charge airow delivery. In down-discharge or high static in-
stallations, the installer should measure the total external
static and review the blower performance charts before per-
forming the installation. In some installations it will be neces-
sary to change the blower speed to provide proper air ow.
Single phase models are shipped without horizontal duct
covers. If needed, these kits may be ordered through Good-
man’s Service Parts department.
Cut insulation around bottom openings and remove panels
from the bottom of the unit, saving the screws holding the
panels in place.
Single phase models require installation of hori-
zontal duct kit #20464501PDGK (medium chassis) and
#20464502PDGK (large chassis). See “Unit Dimensions”
section for chassis sizes.
Duct systems and register sizes must be properly designed
for the C.F.M. and external static pressure rating of the unit.
Ductwork should be designed in accordance with the recom-
mended methods of Air Conditioning Contractors of Ameri-
ca Manual D (Residential) or Manual Q (Commercial). All
ductwork exposed to the outdoors must include a weather-
proof barrier and adequate insulation.
A duct system should be installed in accordance with Stan-
dards of the National Board of Fire Underwriters for the In-
stallation of Air Conditioning, Warm Air Heating and Ventilat-
ing Systems. Pamphlets No. 90A and 90B.
The supply duct from the unit through a wall may be installed
without clearance. However, minimum unit clearances as
shown in the appendix must be maintained. The supply duct
should be provided with an access panel large enough to
inspect the air chamber downstream of the heat exchanger.
A cover should be tightly attached to prevent air leaks.
For duct ange dimensions on the unit refer to the Unit Di-
mension illustration in the appendix.
For down-discharge applications, the ductwork should be at-
tached to the roof curb prior to installing the unit. Ductwork
dimensions are shown in the roof curb installation manual.
If desired, supply and return duct connections to the unit
may be made with exible connections to reduce possible
unit operating sound transmission.
Even though a return air lter is not supplied with this unit,
there must be a means of ltering all return air. All units may
be externally ltered.
Refer to the unit lter size chart in the appendix for lter size
information.
Filters installed external to the unit should be sized in accor-
dance with their manufacturer recommendations. A throw-
away lter must be sized for a maximum face velocity of 300
feet per minute.
When installing a lter, the air ow ar-
rows on the lter must point toward the circulator blower.
1. Locate the ue hood assembly box in the unit.
2. Slide screen over anges on the lower ue hood.
3. Slide screen and lower ue hood into hood.
4. Using the three screws provided, attach the hood
(with the opening facing down) over the ue exhaust
opening in the utility panel.
SCREEN
HOOD
LOWER
FLUE
HOOD
LIP
1. Locate the second hood.
13
jumper position. If the call for HEAT remains after the
transition delay time expires, the control will transition
from low stage to high stage.
6. The 30-second HEAT FAN ON delay time begins after
the main burners light.
7. The unit delivers heat to the conditioned space until
the thermostat is satised.
8. Gas valve(s) de-energizes. The induced draft blower
continues operation for a 30-second post-purge.
9. Induced draft blower remains at low speed (or switches
from high to low if operating at high stage heat) for the
30-second post purge.
10. Ignition control begins timing the HEAT FAN OFF
delay. There is an adjustable HEAT FAN OFF delay
of approximately 90/120/150/180 seconds (factory set
at 150). If the unit is operating at high stage when the
call for heat is removed, the blower will operate for 30
seconds at high heat speed then switch to low heat
speed for the remainder of the selected HEAT FAN
OFF delay.
After the HEAT FAN OFF delay time has
elapsed, the blower will de-energize. This allows any
additional heat in the heat exchanger to be transferred
to the conditioned space.
1. Thermostat calls for low or high stage cooling.
2. If the thermostat call is for low stage cooling, the
compressor and outdoor fan are energized at low
stage. If the thermostat call is for high stage cooling, the
compressor and outdoor fan are energized at high stage.
3. The indoor blower will energize approximately 6
seconds later.
4. The unit delivers cooling to the conditioned space until
the thermostat is satised.
5. The compressor and outdoor fan will be de-energized
when the thermostat opens.
6. The indoor blower continues to run at low cool speed
for approximately 60 seconds after the thermostat is
satised. This allows additional cooling from the indoor
coil to be transferred to the conditioned space. Then,
the indoor blower is de-energized.
A 180-second anti-short cycle is integral to the con-
trol and prevents recycling of the compressor.
1. Thermostat calls for FAN ONLY by energizing “G”.
2. The indoor blower is immediately energized at the low
heat speed. If using the alternate FAN ONLY speed,
the blower is immediately energized at 75% of the
HIGH COOL speed.
3. The indoor blower is immediately de-energized once
thermostat call for FAN is removed.
This unit is equipped with an electronic ignition device to
automatically light the main burners. It also has a power vent
blower to exhaust combustion products.
2. Using the three screws provided, attach the hood
(with the opening facing down) to the heat exchanger
access door.
A 3/4” NPT drain connection is supplied for condensate pip-
ing. An external trap must be installed for proper condensate
drainage.
DRAIN
CONNECTION
UNIT 2" MINIMUM
FLEXIBLE
TUBING-HOSE
OR PIPE
3" MINIMUM
A POSITIVE LIQUID
SEAL IS REQUIRED
This unit is equipped with an ignition control that automat-
ically lights the main burner. DO NOT attempt to light the
main burners by any other method.
1. Thermostat calls for low or high stage heating.
2. Induced draft blower energizes for 15-second pre-purge.
3. The spark igniter and low and high stage gas valve are
energized for 7 seconds. The igniter produces
a very intense electrical spark that ignites the gas.
4. Main burners light and control detects presence of
ame.
5. If the call is for low stage heat, the induced draft blower
switches to low speed and the high stage gas valve
closes 5 seconds after the main burners light. If call
is for high stage heat, induced draft blower remains at
high speed and high stage gas valve remains open.
If a single stage thermostat is used, the control
will step to low stage after the main burners light and
remain at low stage for 5 or 10 minutes, depending on
14
On new installations, or if a major component has been re-
placed, the operation of the unit must be checked.
Check unit operation as outlined in the following instructions.
If any sparking, odors, or unusual sounds are encountered,
shut o electrical power and check for wiring errors, or ob-
structions in or near the blower motors.
The rollout protection device opens, cutting power to the gas
valve, if the ames from the burners are not properly drawn
into the heat exchanger. The rollout protection device is lo-
cated on the burner bracket. The reason for elevated tem-
peratures at the control must be determined and repaired
prior to resetting this manual reset control.
Rollout Protection
The secondary limit control is located on the top of the blower
scroll assembly. This control opens when elevated tempera-
tures are sensed. Elevated temperatures at the control are
normally caused by blower failure. The reason for the opening
should be determined and repaired prior to resetting.
If the power to the unit is interrupted during the heating cy-
cle, it may cause the secondary limit to trip. Once the blower
compartment temperature drops below the limit reset tem-
perature, the limit will automatically reset.
Secondary
Control Limit
Back of Unit
1. Close the manual gas valve external to the unit.
2. Turn o the electrical power supply to the unit.
3. Set the room thermostat to its lowest possible setting.
4. Remove the heat exchanger door on the side of the
unit by removing screws.
5. This unit is equipped with an ignition device which
automatically lights the main burner. DO NOT try to
light burner by any other method.
6. Move the gas control valve switch to the OFF position.
Do not force.
7. Wait ve minutes to clear out any gas.
8. Smell for gas, including near the ground. This is
important because some types of gas are heavier than
air. If you have waited ve minutes and you do smell
gas, immediately follow the warnings on page 3 of this
manual. If having waited for ve minutes and no gas
smell is noted, move the gas control valve switch to
the ON position.
9. Replace the heat exchanger door on the side of the
unit.
10. Open the manual gas valve external to the unit.
11. Turn on the electrical power supply to the unit.
12. Set the thermostat to desired setting.
On/Off Switch
Inlet
Pressure Boss
High Fire
Coil Terminal (HI)
LowFire
Regulator Adjus
t
Manometer
Manometer
Hose
A
High Fire Regulator
Adjust Regulator
Vent
Common
Terminal (C)
Coaxial Coil
Terminal (M)
Outlet
Pressure Boss
Open to
Atmosphere
White-Rodgers Model 36G54 connected to Manometer
Gas supply pressure and manifold pressure with the burners
operating must be as specied on the rating plate.
Gas inlet pressure must be checked and adjusted in accor-
dance to the type of fuel being consumed.
Use adapter kit #0151K00000S to measure gas
pressure on White-Rodgers 36G54 gas valves.
1. Back inlet pressure test screw (inlet pressure boss)
out one turn (counterclockwise, not more than one
turn).
Alternately, inlet gas pressure may be measured by
removing the cap from the dripleg and installing a
predrilled cap with a hose barb tting.
2. Connect a water manometer or adequate gauge to
the inlet pressure tap of the gas valve (or hose barb
tting on predrilled cap).
15
3. Put unit into heating cycle and turn on all other gas
consuming appliances.
Natural Min. 5.0" W.C., Max. 10.0" W.C.
Propane Min. 11.0" W.C., Max. 13.0" W.C.
Inlet gas pressure be within the minimum and maxi-
mum value shown. If operating pressures dier from above,
make necessary pressure regulator adjustments, check pip-
ing size, etc., and/or consult with local utility.
4. Turn o all electrical power and gas supply to the
system.
5. Remove manometer hose from the outlet pressure
boss (or remove hose from hose barb).
6. Turn inlet pressure test screw in to seal pressure port
(clockwise, 7 in-lb minimum).
Alternately, remove predrilled cap from dripleg.
Reinstall original cap, sealing with pipe thread
compound.
7. Turn on electrical power and gas supply to the system.
8. Turn on system power and energize valve.
9. Using a leak detection solution or soap suds, check
for leaks at the pressure boss screw (or dripleg cap).
Bubbles forming indicate a leak. SHUT OFF GAS AND
FIX ALL LEAKS IMMEDIATELY.
Gas Line
G
as
S
hutoff
V
alve
Gas Line
To Furnace
D
rip Leg Cap
W
ith Fitting
Open To
Atmosphere
Manometer Hose
Manometer
1 Turn OFF gas to furnace at the manual gas shuto
valve external to the furnace.
2. Turn o all electrical power to the system.
3. Back outlet pressure test screw (outlet pressure boss)
out one turn (counterclockwise, not more than one
turn).
4. Attach a hose and manometer to the outlet pressure
boss of the valve.
5. Turn ON the gas supply.
6. Turn on power and energize main (M) solenoid. Do
not energize the HI solenoid.
7. Measure gas manifold pressure with burners ring.
Adjust manifold pressure using the Manifold Gas
Pressure table.
Range Nominal
Low Stage 1.7 - 2.3" w.c. 2.0" w.c.
High Stage 3.2 - 3.8" w.c. 3.5" w.c.
Low Stage 5.7 - 6.3" w.c. 6.0" w.c.
High Stage 9.7 - 10.3" w.c. 10.0" w.c.
Gas
Manifold Gas Pressure
Natural
Propane
8. Remove regulator cover screw from the low (LO)
outlet pressure regulator adjust tower and turn screw
clockwise to increase pressure, or counterclockwise
to decrease pressure.
9. Energize main (M) solenoid as well as the HI terminal.
10. Remove regulator cover screw from the HI outlet
pressure regulator adjust tower and turn screw
clockwise to increase pressure, or counterclockwise
to decrease pressure.
11. Turn o all electrical power and gas supply to the
system.
12. Remove manometer hose from outlet pressure boss.
13. Turn outlet pressure test screw in to seal pressure
port (clockwise, 7 in-lb minimum).
14. Turn on electrical power and gas supply to the system.
15. Turn on system power and energize valve.
16. Using a leak detection solution or soap suds, check
for leaks at pressure boss screw. Bubbles forming
indicate a leak. SHUT OFF GAS AND FIX ALL LEAKS
IMMEDIATELY.
For Natural gas to LP gas conversion, Conversion
Kit “LPM-08” must be used. Consult your dealer for appro-
priate conversion kit(s)
To measure the gas input use a gas meter and proceed as
follows:
1. Turn o gas supply to all other appliances except the
unit.
2. With the unit operating, time the smallest dial on the
meter for one complete revolution. If this is a 2 cubic
foot dial, divide the seconds by 2; if it is a 1 cubic foot
dial, use the seconds as is. This gives the seconds
per cubic foot of gas being delivered to the unit.
3. INPUT=GAS HTG VALUE x 3600 / SEC. PER CUBIC
FOOT
Natural gas with a heating value of 1000 BTU per
cubic foot and 36 seconds per cubic foot as determined by
Step 2, then:
Input = 1000 x 3600 / 36 = 100,000 BTU per Hour.
BTU content of the gas should be obtained
from the gas supplier. This measured input must not
be greater than shown on the unit rating plate.
16
4. Relight all other appliances turned o in step 1. Be
sure all pilot burners are operating.
Flames should be stable, soft and blue (dust may cause or-
ange tips but they must not be yellow) and extending directly
outward from the burner without curling, oating or lifting o.
Check the temperature rise through the unit by placing ther-
mometers in supply and return air registers as close to the
unit as possible. Thermometers must not be able to sample
temperature directly from the unit heat exchangers, or false
readings could be obtained.
1. All registers must be open; all duct dampers must be
in their nal (fully or partially open) position and the
unit operated for 15 minutes before taking readings.
2. The temperature rise must be within the range specied
on the rating plate.
Air temperature rise is the temperature dierence be-
tween supply and return air.
With a properly designed system, the proper amount of tem-
perature rise will normally be obtained when the unit is op-
erated at rated input with the recommended blower speed.
If the correct amount of temperature rise is not obtained, it
may be necessary to change the blower speed. A higher
blower speed will lower the temperature rise. A slower blow-
er speed will increase the temperature rise.
Blower speed MUST be set to give the correct air
temperature rise through the unit as marked on the rating
plate.
The total external static pressure must be checked on this
unit to determine if the airow is proper.
1. Using a digital manometer measure the static
pressure of the return duct at the inlet of the unit,
(Negative Pressure).
2. Measure the Static pressure of the supply duct,
(Positive Pressure).
3. Add the two readings together.
Both readings may be taken simultaneously
and read directly on the manometer if so desired.
4. Consult proper table for quantity of air.
If the external static pressure exceeds the minimum or max-
imum allowable statics, check for closed dampers, dirty l-
ters, undersized or poorly laid out ductwork.
The APG16 models are equipped with ECM circulating
blower motors. ECM circulating blower motors are constant
airow motors with very low power consumption. The ECM
motor is controlled by 24VAC signals passed from an ECM
interface module.
The ignition control board has four blower speed outputs:
LOW HEAT, HI HEAT, LOW COOL and HIGH COOL. These
are 24VAC outputs and are passed to the ECM interface
module. Depending on applied thermostat inputs, the igni-
tion control will energize the appropriate blower speed out-
put with 24VAC. This signal is passed to the ECM interface
module, which in turn passes the signal to the ECM motor.
The ECM motor then operates at the correct speed, deliver-
ing the appropriate airow.
The FAN ONLY blower speed is the same as the
LOW HEAT speed unless the Alternate FAN ONLY speed is
used (see “Alternate FAN ONLY Speed” section).
The blower speed as shipped from the factory should deliver
the correct airow. However, if installation conditions require
a dierent airow, the blower speed may be adjusted using
the DIP switches on the ECM interface module (located in the
blower compartment. Use the following gure and the airow
tables in the Appendix to set the desired blower speed.
17
DIP
SWITCH
12345678
••••••••
••••••••
Switches Function
1, 2 Heating Speeds
3Unused
4OFF for Two-Stage
5, 6 Cooling Speeds
7, 8 Airflow Adjus t
Heating airow must be adjusted to provide the tem-
perature rise shown on rating plate. Blower speeds are pro-
grammed to deliver adequate airow at rated external static
pressure (ESP). Refer to airow table provided in the Ap-
pendix for details.
Check limit control operation after 15 minutes of operation
by blocking the return air grille(s).
1. After several minutes the main burners must go
OFF. Blower will continue to run.
2. Remove air restrictions and main burners will relight
after a cool down period of a few minutes.
Adjust the thermostat setting below room temperature.
1. Main burners must go OFF.
2. Circulating Air Blower will continue to run for 90,
120, 150 or 180 seconds, depending on the setting.
If necessary, adjust fan OFF delay settings to obtain
satisfactory comfort level.
L OCOOL
HI COOL
L O HEAT
HI HEA T
U6
U7
U4
U5
U3
K2
K1
P1
ECON
STAGE
DELAY
SPEEDUP
S W1
F AU L T
RECA L L
BLOWER
OFFDELAY
F1
R C W1 W2 GY1 Y2
1. Set the thermostat to lowest setting.
2. Turn o the electrical power supply to the unit.
3. Remove the heat exchanger door on the side of the
unit by removing screws.
4. Move the gas control valve switch to the OFF position.
Do not force.
5. Close manual gas shuto valve external to the unit.
6. Replace the heat exchanger door on the unit.
7. If cooling and/or air circulation will be desired, turn
ON the electrical power.
The outdoor temperature must be 60°F or higher
before making adjustments to charge.
The compressor includes components which are designed to
protect the compressor against abnormal operating conditions.
Check unit charge before putting the cooling section into full
operation. The unit has a thermostatic expansion valve me-
tering device. To ensure the unit is properly charged for the
intended application, check the unit refrigerant sub-cooling at
the condenser. The refrigerant sub-cooling is a function of out-
door ambient temperature and return air temperature of the
conditioned space. It is the installing contractors responsibility
to ensure the proper refrigerant sub-cooling at the condenser
is adjusted for each application. As the outdoor ambient tem-
perature rises the sub-cooling decreases and as the outdoor
ambient temperature lowers, the sub-cooling increases.
Proper sub-cooling adjustment optimizes cooling
performance. Models equipped with thermostatic expansion
valve, charge the system to sub-cooling, range shown on
chart, when necessary, adjust expansion valve stem for su-
perheat setting.
Refrigerant gas is considered superheated whenever its
temperature is higher than the saturation temperature cor-
responding to its pressure. The degree of superheat equals
the degrees of temperature increase above the saturation
temperature at existing pressure.
1. Run system at least 10 minutes to allow pressure to
stabilize.
2. Temporarily install thermometer on suction (large) line
near compressor with adequate contact and insulate
for best possible reading.
18
3. Refer to the superheat table provided for
proper system superheat. Add charge to lower
superheat or recover charge to raise superheat.
The expansion valve will not need adjustment for
most applications. Ensure system superheat is set within
range listed on chart below.
To adjust superheat, unscrew the cover from the expansion
valve, locate the adjustment screw, and turn it clockwise (in)
to increase superheat or counterclockwise (out) to decrease
superheat. Replace adjustment cap. Wait a minimum of 10
minutes between adjustments to allow time for the TXV and
pressures to stabilize.
65 70 75 80 85
100 ---10 10
95 - - 10 10 10
90 - - 12 15 18
85 -10 13 17 20
80 -10 15 21 26
75 10 13 17 25 29
70 10 17 20 28 32
65 13 19 26 32 35
60 17 25 30 33 37
Ambient
Condenser Inlet
Temp (°F Drybulb)
Return Air Temp. (°F Drybulb)
Refrigerant liquid is considered subcooled when its tempera-
ture is lower than the saturation temperature corresponding
to its pressure. The degree of subcooling equals the degrees
of temperature decrease below the saturation temperature
at the existing pressure.
1. Attach an accurate thermometer or preferably a
thermocouple type temperature tester to the liquid
line close to the pressure switch.
2. Install a high side pressure gauge on the liquid access
tting.
3. Record the gauge pressure and the temperature of
the line.
4. The dierence between the thermometer reading and
pressure to temperature conversion is the amount of
subcooling.
EXAMPLE:
a. Liquid Line Pressure = 417
b. Corresponding Temp. °F. = 120°
c. Thermometer on Liquid line = 109°F.
To obtain the amount of subcooling, subtract 109°F from
120°F. The dierence is 11° subcooling. See the specication
sheet or technical information manual for the design subcool-
ing range for your unit.
Mechanical cooling cannot be reliably provided at
ambient temperatures below 50° F.
1. Turn on the electrical power supply to the unit.
2. Place the room thermostat selector switch in the
COOL position (or AUTO if available, and if automatic
changeover from cooling to heating is desired).
3. Set the room thermostat to the desired temperature.
The following presents probable causes of questionable unit
operation. Refer to Diagnostic Indicator Chart for an inter-
pretation of the signal and to this section for an explanation.
Remove the control box access panel and note the num-
ber of diagnostic LED ashes. Refer to Diagnostic Indicator
Chart for an interpretation of the signal and to this section for
an explanation.
The ignition control is equipped with a momentary push-but-
ton switch that can be used to display on the diagnostic LED
the last ve faults detected by the control. The control must
be in Standby Mode (no thermostat inputs) to use the fea-
ture. Depress the push-button switch for approximately 2
seconds.
Release the switch when the LED is turned o.
The diagnostic LED will then display the ash codes associ-
ated with the last ve detected faults. The order of display is
the most recent fault to the least recent fault.
If the integrated ignition control in this unit encounters an
internal fault, it will go into a “hard” lockout and turn o the
diagnostic LED. If diagnostic LED indicates an internal fault,
check power supply to unit for proper voltage, check all fus-
es, circuit breakers and wiring. Disconnect electric power
for ve seconds. If LED remains o after restoring power,
replace control.
An external lockout occurs if the integrated ignition control
determines that a measurable combustion cannot be estab-
lished within three (3) consecutive ignition attempts. If ame
is not established within the seven (7) second trial for igni-
tion, the gas valve is de-energized, 30 second inter-purge
cycle is completed, and ignition is re-attempted. The control
will repeat this routine three times if a measurable combus-
tion is not established. The control will then shut o the in-
duced draft blower and go into a lockout state.
If ame is established but lost, the control will energize the
circulator blower at the heat speed and then begin a new
ignition sequence. If ame is established then lost on subse-
quent attempts, the control will recycle the ignition sequence.
19
The diagnostic fault code is 1 ash for a lockout due to failed
ignition attempts. The integrated control will automatically
reset after one hour, or it can be reset by removing the ther-
mostat signal or disconnecting the electrical power supply
for over ve seconds. If the diagnostic red LED indicates an
external lockout, perform the following checks:
• Check the supply and manifold pressures
• Check the gas orices for debris
• Check gas valve for proper operation
• Check ame sensor
A drop in ame signal can be caused by nearly
invisible coating on the sensor. Remove the sensor
and carefully clean with steel wool.
• Auxiliary/Secondary Limit
A dirty lter, excessive duct static, insucient air
ow, a faulty limit, or a failed circulator blower can
cause this limit to open. Check lters, total external
duct static, circulator blower motor, blower motor
speed tap (see wiring diagram), and limit. An
interruption in electrical power during a heating
cycle may also cause the auxiliary limit to open.
The automatic reset secondary limit is located on
top of the circulator blower assembly.
• Rollout Limit
If the burner ames are not properly drawn into
the heat exchanger, the ame rollout protection
device will open. Possible causes are restricted
or blocked flue passages, blocked or cracked
heat exchanger, a failed induced draft blower, or
insucient combustion air. The rollout protection
device is a manual reset limit located on the burner
bracket. The cause of the ame rollout must be
determined and corrected before resetting the limit.
• Check wiring
Check wiring for opens/shorts and miswiring.
If you have to frequently reset your
gas/electric package unit, it means that a problem exists that
should be corrected. Contact a qualied servicer for further
information.
A pressure switch stuck open can be caused by a faulty
pressure switch, faulty wiring, a disconnected or damaged
hose, a blocked or restricted ue, a blocked pressure tap or
a faulty induced draft blower.
If the control senses an open pressure switch during the pre-
purge cycle, the induced draft blower only will be energized.
If the pressure switch opens after ignition has begun the gas
valve is de-energized, the circulator blower heat o cycle
begins, and the induced draft blower remains on. The diag-
nostic LED (red) code is two (2) ashes.
A stuck closed pressure switch can be caused by a faulty pres-
sure switch or faulty wiring. If the control encounters a pressure
switch stuck closed, the induced draft blower remains o. The
diagnostic red LED code for this fault is three (3) ashes.
A primary limit will open due to excessive supply air tem-
peratures. This can be caused by a dirty lter, excessive
duct static, insucient air ow, or a faulty limit. Check lters,
total external duct static, blower motor, blower motor speed
tap (see wiring diagram), and limit. This limit will automati-
cally reset once the temperature falls below a preset level.
If a limit switch opens, the gas valve is immediately de-en-
ergized, the induced draft and air circulating blowers are en-
ergized. The induced draft and air circulator blowers remain
energized until the limit switch re-closes. The diagnostic
LED (red) code for an open limit is four (4) ashes.
If the primary limit opens ve (5) times within the
same call for heat, the ignition control will lock out for one
(1) hour with the air circulating blower energized at high heat
speed. The diagnostic LED (red) code for this condition is
seven (7) ashes.
If ame is detected with the gas valve de-energized, the
combustion and air circulator blowers are energized. The di-
agnostic fault code is ve (5) ashes (red LED) for this con-
dition. The ame diagnostic LED (amber) will ash (2) times
to indicate this condition. The control can be reset by remov-
ing the power supply to the unit or it will automatically reset
after one hour. Miswiring is the probable cause for this fault.
Under some conditions, the fuel or air supply can create a
nearly invisible coating on the ame sensor. This coating
acts as an insulator causing a drop in the ame signal. If the
ame signal drops below a predetermined value, the ignition
control will display an error code of (1) ash on the amber
diagnostic LED. The unit will continue to operate until the
control can no longer detect ame.
The automatic ignition control has a built-in feature that pre-
vents damage to the compressor in short cycling situations.
In the event of intermittent power losses or intermittent ther-
mostat operation, the ignition control will delay output to the
compressor contactor for three minutes from the time power
is restored or thermostat call for cooling is restored. (Com-
pressor is o a total of three minutes). The diagnostic red
LED will ash six (6) times to indicate the compressor con-
tactor output is being delayed.
Some electronic thermostats also have a built-in
compressor short cycle timer that may be longer than the
three minute delay given above. If you are using an elec-
tronic thermostat and the compressor has not started after
three minutes, wait an additional ve minutes to allow the
thermostat to complete its short cycle delay time.
Some models include a high pressure cutout switch and/
or a loss of charge cutout switch. The high pressure cutout
switch protects the refrigeration system from excessive op-
erating pressures. The loss of charge cutout switch protects
20
the refrigeration system from very low operating pressures
due to a loss of refrigerant. Compressor operation will be
disabled if either of these devices opens. If either devices
opens, the diagnostic red LED will ash (9) times to indicate
that a refrigeration system pressure switch is open.
Have the gas heating section of the unit checked at least
once a year before the heating season begins, to be sure
that the combustion air inlet and ue outlet hoods are not
blocked by debris, which would prevent adequate combus-
tion air and a properly operating vent system.
A return air lter is not supplied with this unit; however, there
must be a means of ltering all of the return air. The lter(s)
may be located in the return air duct(s), or return air lter
grille(s). Consult with your installing dealer for the actual lo-
cation of the return air lter(s) for your unit.
Dirty lters are the most common cause of inadequate heat-
ing or cooling performance. Filter inspection should be made
at least every two months; more often if necessary because
of local conditions and usage.
Dirty throwaway lters should be discarded and replaced
with a new, clean lter. Dirty permanent lters should be
washed with water, thoroughly dried and sprayed with a lter
adhesive before being reinstalled. (Filter adhesives may be
found at many hardware stores.) Permanent lters should
last several years. However, should one become torn or un-
cleanable, it should be replaced.
Use a ne grade automotive wax on the cabinet nish to
maintain the nish’s original high luster. This is especially
important in installations with extended periods of direct sun-
light.
The coil with the outside air owing over it should be inspect-
ed annually and cleaned as frequently as necessary to keep
the nned areas free of lint, hair and debris.
Bearings on the air circulating blower motor, condenser mo-
tor and the combustion fan motor are permanently lubricat-
ed. No additional oiling is required.
A drop in the ame current can be caused by a nearly invisi-
ble coating on the ame sensor. This coating, created by the
fuel or combustion air supply, can be removed by carefully
cleaning the ame sensor with steel wool.
After cleaning, the microamp signal should be stable
and in the range of 4 - 6 microamps DC.
Flame
Sensor
At the start of each heating season, inspect and, if neces-
sary, clean the unit ue passage.
1. Shut o electric power and gas supply to the unit.
2. Remove burner assembly by disconnecting the gas
line and removing the manifold bracket from the
partition panel.
3. Remove the ue from the induced draft blower and
the collector box cover from the partition panel.
4. The primary heat exchanger tubes can be cleaned
using a round wire brush attached to a length of high
grade stainless steel cable, such as drain cleanout
cable. Attach a variable speed reversible drill to the
other end of the spring cable. Slowly rotate the cable
with the drill and insert it into one of the primary heat
exchanger tubes. While reversing the drill, work the
cable in and out several times to obtain sucient
cleaning. Use a large cable for the large tube, and
then repeat the operation with a small cable for the
smaller tube. Repeat for each tube.
5. When all heat exchanger tubes have been cleaned,
replace the parts in the reverse order in which they
were removed.
6. To reduce the chances of repeated fouling of the
heat exchanger, perform the steps listed in “Startup,
Adjustments, and Checks”.
Flames should be stable, soft and blue (dust may cause or-
ange tips but must not be yellow). The ames must extend
directly outward from the burner without curling, oating or
lifting o.
At least once a year, prior to or during the heating season,
make a visual check of the burner ames.
Table of contents
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