Daikin DP14G M Series User manual

1
Ax this manual and
Users Information Manual adjacent to the unit.
DP14G M SERIES With R-410A
Single PAckAge gAS-electRic heAting & cooling Unit
Index
REPLACEMENT PARTS..................................................................... 3
ORDERING PARTS .................................................................. 3
SAFETY INSTRUCTIONS................................................................... 3
TO THE INSTALLER.................................................................. 3
GENERAL INFORMATION................................................................ 5
TRANSPORTATION DAMAGE ................................................. 5
UNIT LOCATION .............................................................................. 6
ALL INSTALLATIONS: .............................................................. 6
GROUND LEVEL INSTALLATIONS ONLY: ................................. 6
ROOFTOP INSTALLATIONS ONLY:........................................... 6
ROOF CURB INSTALLATIONS ONLY: ....................................... 7
RIGGING DETAILS............................................................................ 7
GAS PIPING ..................................................................................... 7
 .......... 8
PIPING.................................................................................... 8
GAS PIPING CHECKS .............................................................. 9
PROPANE GAS INSTALLATIONS ...................................................... 9
TANKS AND PIPING................................................................ 9
ELECTRICAL WIRING..................................................................... 10
THERMOSTAT LOCATION ..................................................... 10
  ......... 10
UNIT VOLTAGE...................................................................... 11
CIRCULATING AIR AND FILTERS.................................................... 11
AIRFLOW CONVERSION ....................................................... 11
DUCTWORK.......................................................................... 11
ONLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL, ADJUST, SERVICE OR
REPAIR (HEREINAFTER, “SERVICE”) THE EQUIPMENT SPECIFIED IN THIS
MANUAL SHOULD SERVICE THE EQUIPMENT. THE MANUFACTURER WILL NOT
BE RESPONSIBLE FOR ANY INJURY OR PROPERTY DAMAGE ARISING FROM
IMPROPER SERVICE OR SERVICE PROCEDURES. IFYOU SERVICE THIS UNIT, YOU
ASSUME RESPONSIBILITY FOR ANY INJURY OR PROPERTY DAMAGE WHICH MAY
RESULT. INADDITION, IN JURISDICTIONS THAT REQUIRE ONE OR MORE
LICENSES TO SERVICE THE EQUIPMENT SPECIFIED IN THIS MANUAL, ONLY
LICENSED PERSONNEL SHOULD SERVICE THE EQUIPMENT. IMPROPER
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.
INSTALLATION INSTRUCTIONS
These installation instructions cover the outdoor installation
of self contained package air conditioners and heating units.
See the Specication Sheets applicable to your model for
information regarding accessories.
*NOTE: Please contact your distributor or our website for
the applicable Specication Sheets referred to in this manual.
This Forced Air Central Unit Design Complies With Require-
ments Embodied In The American National Standard / Na-
tional Standard of Canada Shown Below.
ANSI Z21.47•CSA-2.3 Central Furnaces.
RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.
Our continuing commitment to quality products may mean a change in specications without notice.
19001 Kermier Road, Waller, TX 77484
www.daikincomfort.com
©2014 - 2019, 2021
IOD-3008J
05/2021

2
FILTERS ................................................................................. 12
VENTING ....................................................................................... 12
FLUE HOOD INSTALLATION.................................................. 12
CONDENSATE DRAIN .................................................................... 12
CONDENSATE DRAIN CONNECTION .................................... 12
NORMAL SEQUENCE OF OPERATION........................................... 12
COOLING .............................................................................. 13
FAN ONLY ............................................................................. 13
STARTUP, ADJUSTMENTS, AND CHECKS....................................... 13
HEATING STARTUP .............................................................. 13
GAS SUPPLY PRESSURE MEASUREMENT............................. 14
GAS MANIFOLD PRESSURE MEASUREMENT
AND ADJUSTMENT............................................................... 15
COOLING STARTUP .............................................................. 17
TEMPERATURE RISE CHECK ................................................ 16
EXTERNAL STATIC PRESSURE CHECK .................................. 16
SUPERHEAT ................................................................................... 17
CHECKING SUPERHEAT ....................................................... 17
CHECKING SUBCOOLING ..................................................... 18
TROUBLESHOOTING ..................................................................... 18
IGNITION CONTROL ERROR CODES..................................... 18
ABNORMAL OPERATION - HEATING.................................... 18
ABNORMAL OPERATION - COOLING ................................... 20
MAINTENANCE ............................................................................. 20
FILTER REPLACEMENT OR CLEANING ................................. 20
CABINET FINISH MAINTENANCE......................................... 20
  .......... 20
CONDENSER, EVAPORATOR,
 ..................................... 20
 ..................... 20
  .................... 20
CLEANING FLUE PASSAGES
  ........................................... 20
 .......... 21
CLEANING BURNERS............................................................ 21
ACCESSORIES AND FUNCTIONAL PARTS...................................... 21
SHEET METAL ACCESSORIES ............................................... 21
FUNCTIONAL PARTS............................................................. 21
GENERAL INFORMATION..................................................... 21
BLOWER PERFORMANCE DATA .................................................... 22
IGNITION CONTROL DIAGNOSTIC INDICATOR CHART
 .................................................... 26
HEATING TIMING CHART.............................................................. 26
COOLING TIMING CHART ............................................................. 26
IGNITION CONTROL DIAGNOSTIC INDICATOR CHART
........................................................ 27
HEATING TIMING CHART.............................................................. 27
COOLING TIMING CHART ............................................................. 27
APPENDIX ..................................................................................... 28
UNIT DIMENSIONS ....................................................................... 28
MINIMUM CLEARANCES .............................................................. 29
RECOMMENDED FILTER SIZES...................................................... 29
WIRING DIAGRAMS...................................................................... 30
HOMEOWNER’S ROUTINE MAINTENANCE.................................. 43
 ........................................................................... 44

3
REPLACEMENT PARTS

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. For the location of your nearest
distributor, consult the white business pages, the yellow page
section of the local telephone book or contact:
HOMEOWNER SUPPORT
DAIKIN NORTH AMERICA LLC
19001 KERMIER ROAD
WALLER, TEXAS 77484
855-770-5678
SAFETY INSTRUCTIONS

Before installing this unit, please read this manual to familiarize
yourself on the specic items which must be adhered to,
including maximum external static pressure to unit, air
temperature rise, minimum or maximum CFM and motor speed
connections.
Keep this literature in a safe place for future reference.
WARNING
SHOULD OVERHEATING OCCUR OR T HE G AS S Y FAIL TO SHUT O FF, TURN
OFF THE MANUAL GAS SHUTOFF VALVE EXTERNAL TO T HE FURNACE BEFORE
TURNING OFF THE ELECTRICAL S Y.
WARNING
TO AVOID ERTY DAMAGE, ERSONAL INJURY O R DEATH, D O NOT USE
THIS U NIT IF A NY ART HAS BEEN U NDER W ATER. IMMEDIATELY C ALL A
QUALIFIED SERVICE TECHNICIAN T O INECT THE FURNACE AND T O REACE
ANY ART O F THE CONTROL SYSTEM A ND A NY G AS C ONTROL H AVING BEEN
UNDER WATER.
WARNING
T
O REVENT THE RISK OF ROERTY DAMAGE, ERSONAL INJURY, OR DEATH,
DO NOT STORE COMBUSTIBLE MATERIALS OR USE GASOLINE OR OTHER
FLAMMABLE LIQUIDS OR VAORS IN THE VICINITY OF THIS ALIANCE.
FIRE OR EXPLOSION HAZARD
F AILURE TO FOLLOW THE SAFETY WARNINGS EXACTLY COULD RESULT IN
SERIOUS INJURY , DEATH OR PROPERTY DAMAGE . N EVER TEST FOR GAS LEAKS
WITH AN OPEN FLAME . U SE COMMERCIALLY AVAILABLE SOAP SOLUTION
MADE SPECIFICALLY FOR THE DETECTION OF LEAKS TO CHECK ALL
CONNECTIONS . A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY
DAMAGE , PERSONAL INJURY OR LOSS OF LIFE .
RISQUE D’INCENDIE OU D’EXPLOSION
S
I L ES C ONSIGNES D E S É CURITÉ N E S ONT P AS S UIVIES À L A L ETTRE , C ELA
P
EUT E NTRAÎNER L A M ORT , D E G RAVES B LESSURES
O U D ES D OMMAGES
M
ATÉRIELS . N E J AMAIS V É RIFIER L A P RÉ SENCE D E F UITES D E G AZ A U
M
OYEN D' UNE F LAMME N UE . V É RIFIER T OUS L ES R ACCORDS E N U TILISANT
U
NE S OLUTION S AVONNEUSE C OMMERCIALE C ONÇ UE S PÉ CIALEMENT P OUR
L
A D ÉTECTION D E F UITES . U N I NCENDIE O U U NE E XPLOSION R ISQUE D E S E
P
RODUIRE , C E Q UI P EUT E NTRAÎNER L A M ORT , D ES B LESSURES O U D ES
D
OMMAGES M ATÉRIELS .

4
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

WARNING
T
O EVENT ERTY DAMAGE, ERSONAL I NJURY O R DEATH, DUE TO FIRE,
EXOSIONS, SMOKE, S OOT, C ONDENSATION, E LECTRIC SHOCK OR CARBON
MONOXIDE, THIS UNIT MUST B E ERLY I NSTALLED, R AIRED, O RATED,
AND MAINTAINED.
This unit is approved for outdoor installation ONLY. Rated perfor-
mance is achieved after 20 hours of operation. Rated performance is
delivered at the specied airow. See outdoor unit specication sheet
for split system models or product specication sheet for packaged
and light commercial models. Specication sheets can be found
at www.daikincomfort.com for Daikin 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 specication sheet.
To assure that your unit operates safely and e󰀩ciently, 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 NFPA54/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 con-
ditioned. 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.
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 damage 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 retightened. 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 notied as
soon as possible-preferably within 5 days.
4. File the claim with the following supporting documents:
a. Original Bill of Lading, certied copy, or indemnity bond.
b. Original paid freight bill or indemnity in lieu thereof.
c. Original invoice or certied 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.
NOTE: When inspecting the unit for transportation damage, remove
all packaging materials. Recycle or dispose of the packaging material
according to local codes.
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.

6
Unit location
WARNING
TO EVENT SSIBLE E QUMENT DAMAGE, RORTY DAMAGE, RSONAL
INJURY OR DEATH, T HE F OLLOWING BULLET INTS M UST BE O BSERVED
WHEN INSTALLING 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 a󰀨ected 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 protection, proper operation, and service access
(see appendix). These clearances must be permanently
maintained.
• The combustion air inlet and flue 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.
Outside Slab Installation

NOTE: 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 su󰀩cient 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.

7
Rooftop Installation
• 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.

• Su󰀩cient 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 roong
material are furnished by the contractor.
Roof Curb Installation
RIGGING DETAILS
WARNING
T
O EVENT ERTY D AMAGE, T HE U NIT SHOULD R EMAIN IN AN RIGHT
SITION DURING ALL RIGGING AND MOVING O RATIONS.
T
O FACILITATE
LIFTING AND MOVING W HEN A CRANE I S USED, ACE THE UNIT IN AN
ADEQUATE CABLE SLING.
Important: If using bottom discharge with roof curb, ductwork should
be attached to the curb prior to installing the unit. Ductwork dimen-
sions are shown in roof curb installation instructions.
Refer to the Roof Curb Installation Instructions for proper curb in-
stallation. Curbing must be installed in compliance with the National
Roong 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.
Rigging
GAS PIPING
This unit is factory set to operate on natural
gas at the altitudes shown on the rating plate.
WARNING
T
O AVOID ERTY D AMAGE, ERSONAL INJURY OR DEATH WHEN E ITHER
USING ANE GAS ALONE OR A T HIGHER A LTITUDES, O BTAIN AND INSTALL
THE ER C ONVERSION KIT(S).
F
AILURE T O DO S O CAN RESULT I N
UNSATISFACTORY ERATION AND/OR EQUIENT DAMAGE.
H
IGH ALTITUDE
KITS A RE F OR
U
.
S
. INSTALLATIONS ONLY A ND ARE NOT OVED F OR U SE
IN
C
ANADA.
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 the factory authorized conversion kit LPM-07, for use with
single stage models, or LPM-08, for use with two-stage models.
See table below.
LP Conversion Kit Model
LPM-07 Single Stage Heating Models
LPM-08 Two-Stage Heating Models

8

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 Maximum Value
Shown in Table Above.
The minimum supply pressure should not vary from that shown in
the table above 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. Overring of the
unit could result in premature heat exchanger failure.

IThe gas/electric units naturally derate with al-
titude. Do not attempt to increase the r ing rate by changing orices
or increasing the manifold pressure. This can cause poor combustion
and equipment failure. At all altitudes, the manifold pressure must
be within 0.3 inches W.C. of that listed on the nameplate for the fuel
used. At all altitudes and with either fuel, the air tempera ture rise
must be within the range listed on the unit nameplate.
Refer to the Installation Manual provided with the LP kit for conver-
sion from natural gas to propane gas and for altitude adjustments.
NOTE: For altitudes above 2,000 feet, please refer to the gas/electric
package unit specication sheet for required kit(s).

ITo avoid possible unsatisfactory operation or
equipment damage due to under ring of equipment, do not undersize
the natural/propane gas piping from the meter/tank to the unit. When
sizing a trunk line, include all appliances 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 installation 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.

1/2 3/4 11 1/4 1 1 /2
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)
Natural Gas Capacity of Pipe
in Cubic Feet of Gas Per Hour (CFH)
Nominal Black Pipe Size (inches)
Length of
Pipe in Feet
BTUH Furnace Input
Heating Value of Gas (BTU/Cubic Foot)
CFH =
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 ttings (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)

NOTE: 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.

9

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 com mercial compounds, special pipe dope must
be used. Shellac base compounds resistant to the actions
of liqueed petroleum gases such as Gasolac®, Stalactic®,
Clyde’s® or John Crane® are satisfactory.
See below for typical propane gas piping.

Maximum

 Continuous
11" W.C.
Second Stage
Regulator
First Stage
Regulator

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
3/8" 1/2" 5/8" 3/4" 7/8" 1/2" 3/4"
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

TUBING
LENGTH,
FEET

SCHEDULE 40

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
3/8" 1/2" 5/8" 3/4" 7/8" 1/2"
3/4" 1" 1-1/4" 1-1/2"
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

SCHEDULE 40


TUBING
LENGTH,
FEET


CAUTION
T
O EVENT OTY DAMAGE OR ERSONAL INJURY D UE T O FIRE, THE
FOLLOWING I NSTRUCTIONS M UST BE ERFORMED R EGARDING G AS
CONNECTIONS AND ESSURE T ESTING:
•
T
HE U NIT AND ITS G AS CONNECTIONS M UST BE L EAK TESTED B EFORE
ACING IN O RATION.
B
ECAUSE O F THE DANGER O F EXOSION OR
FIRE, NEVER USE A MATCH OR O N FLAME TO TEST F OR LEAKS.
N
EVER
EXCEED S CIFIED RESSURES F OR TESTING.
H
IGHER ESSURE M AY
DAMAGE G AS V ALVE A ND C AUSE O VERFIRING WHICH MAY RESULT I N
EMATURE HEAT E XCHANGE F AILURE.
•
T
HIS UNIT A ND ITS SHUT-OFF V ALVE M UST BE D ISCONNECTED F ROM
THE GAS SY DURING ANYRESSURE TESTING OF THAT SYSTEM AT
TEST ESSURES IN EXCESS OF 1/2
G
(3.48 K

A).
•
T
HIS UNIT M UST BE I SOLATED FROM T HE G AS S Y SYSTEM B Y
CLOSING ITS MANUAL SHUT-OFF V ALVE D URING A NY RESSURE
TESTING OF T HE G AS S Y NG S YSTEM AT T EST ESSURES
EQUAL TO O R LESS T HAN 1/2
G
( 3.48 K

A).
WARNING
T
O AVOID ERTY DAMAGE OR ERSONAL INJURY, BE S URE THERE IS
NO ON FLAME IN T HE V ICINITY DURING A IR B LEEDING.
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.
PROPANE GAS INSTALLATIONS
WARNING
TO AVOID OTY DAMAGE, SONAL INJURY O R DEATH DUE TO F IRE
OR E LOSION C AUSED BY A  RONE G AS L EAK, I NSTALL A G AS
DETECTING WARNING DEVICE. SINCE RUST CAN REDUCE T HE L EVEL
OF O DORANT IN ANE GAS, A G AS DETECTING W ARNING D EVICE
IS T HE O NLY RELIABLE W AY T O DETECT A RONE G AS L EAK.
CONTACT A L OCAL RONE G AS S IER ABOUT INSTALLING A
GAS DETECTING WARNING DEVICE.
  Propane gas conversion kits must be
installed to convert units to propane gas.
All propane gas equipment must conform to the safety
standards 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 pressure
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.

10
Thermostat Wiring - Two Stage Models
RCW1W2 GY1 Y2
RY2
CY1
W1 G
W2
Furnace Integrated
Control Module
Thermostat
Two-Stage Heating
with
Two-Stage Cooling
(
(
Two-Stage Heating with Two-Stage Cooling
Thermostat Diagram

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.
5 MINUTE DELAY
PERIOD WITH
JUMPER IN THIS
POSITION
10 MINUTE DELAY
PERIOD WITH
JUMPER IN THIS
POSITION
Two-Stage Heating (timed) and Two-Stage Cooling (timed)
with Single Stage Thermostat Diagram
Refer to the unit wiring diagram for electrical connections. When
installed, the unit must be electrically grounded in accordance
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 connections are
waterproof.
WARNING
TO AVOID THE RISK O F ELECTRICAL SHOCK, WIRING T O THE UNIT M UST BE
LARIZED AND G ROUNDED.
CAUTION
T
O AVOID ERTY DAMAGE OR ERSONAL I NJURY DUE T O FIRE, USE
ONLY C R CONDUCTORS.
WARNING
T
O EVENT ERTY D AMAGE OR S ERIOUS ERSONAL INJURY D UE T O
FIRE O R EXOSION CAUSED B Y A ANE GAS LEAK, I NSTALL A GAS
DETECTING WARNING DEVICE.
I
F THE ANE GAS UNIT I S INSTALLED IN A N EXCAVATED AREA OR A
CONFINED S CE, A WARNING DEVICE I S REQUIRED D UE T O:
•

ROANE G AS I S HEAVIER THAN A IR AND ANY L EAKING G AS CAN
SETTLE I N ANY L OW A REAS O R CONFINED S CES.
•

ROANE GAS ODORANT MAY FADE, MAKING THE GAS UNDETECTABLE
EXCE W ITH A WARNING DEVICE.
ELECTRICAL WIRING

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 it
will be a󰀨ected 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.
Five ton models have two stages of heating and two stages of
mechanical cooling. Units which have economizers may use
thermostats with two or three stages of cooling.
All other units have one stage of heating and one stage of
mechanical cooling. Units which have economizers may use
thermostats with one or two stages of cooling.
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. 24 volt wiring must be connected
between the unit control panel and the room thermostat.
Thermostat Wiring - Single Stage Models
From
Unit
Single Stage Heating & Cooling Thermostat Diagram

11
CAUTION
T
O EVENT IMER A ND DANGEROUS O RATION D UE TO WIRING ERRORS,
LABEL ALL WIRES IOR TO D ISCONNECTION W HEN SERVICING CONTROLS.
V
ERIFY ER O RATION AFTER SERVICING.
For unit protection, use a time delay 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 weatherproof
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.

The unit transformer is factory connected for 230V operation.
If the unit is to operate on 208V, reconnect the transformer
primary lead as shown on the unit wiring diagram.
CIRCULATING AIR AND FILTERS

Units can easily be converted from horizontal to down-discharge
airow delivery. In down-discharge or high static installations,
the installer should measure the total external static and
review the blower performance charts before performing the
installation. In some installations it will be necessary to change
the blower speed to provide proper air ow.
Horizontal Air Flow
Single phase models are shipped without horizontal duct covers.
If needed, these kits may be ordered through Daikin’s Service
Parts department.
For 3-phase models only, remove supply and return duct covers
which are attached to the unit as shown below.
Remove these covers
for horizontal duct
applications
Duct Cover Installation

Cut insulation around bottom openings and remove panels
from the bottom of the unit, saving the screws holding the
panels in place.
NOTE: Single phase models require installation of horizontal
duct kit #20464501NGK (medium chassis) and #20464502NGK
(large chassis). See “Unit Dimensisons” 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
recommended methods of Air Conditioning Contractors of
America Manual D (Residential) or Manual Q (Commercial). All
ductwork exposed to the outdoors must include a weatherproof
barrier and adequate insulation.
A duct system should be installed in accordance with Standards
of the National Board of Fire Underwriters for the Installation of
Air Conditioning, Warm Air Heating and Ventilating 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 flange dimensions on the unit refer to the Unit
Dimension illustration in the appendix.
For down-discharge applications, the ductwork should be
attached 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.

12

CAUTION
T
O PREVENT PROPERTY D AMAGE DUE TO F IRE AND LOSS OF
EQUIPMENT EFFICIENCY O R EQUIPMENT DAMAGE DUE TO DUST AND LINT
BUILD UP O N INTERNAL P ARTS, NEVER OPERATE UNIT W ITHOUT A N AIR
FILTER I NSTALLED I N THE RETURN A IR S YSTEM.
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
accordance with their manufacturer recommendations. A
throwaway lter must be sized for a maximum face velocity of
300 feet per minute.

Important: When installing a lter, the air ow arrows on the
lter must point toward the circulator blower.
VENTING
NOTE: Venting is self-contained. Do not modify or block.

Install the exhaust ue hood and combustion air intake hood
prior to operation of the unit.
To install the ue hood cover, please refer to the installation
instructions, included in the ue hood assembly package located
in the blower compartment.
Flue Hood and Bug Screen Installation
CONDENSATE DRAIN

A 3/4” NPT drain connection is supplied for condensate piping. An
external trap must be installed for proper condensate drainage.
NOTE: Maximum torque is 10 in-lbs.
DRAIN
CONNECTION
UNIT 2" MINIMUM
FLEXIBLE
TUBING-HOSE
OR PIPE
3" MINIMUM
A POSITIVE LIQUID
SEAL IS REQUIRED
Drain Connection
NORMAL SEQUENCE OF OPERATION
This unit is equipped with an ignition control that automatically
lights the main burner. DO NOT attempt to light the main
burners by any other method.
1. Thermostat calls for heat.
2. The induced draft blower energizes for a 15-second pre-
purge.
3. The spark igniter and gas valve energizes for 7 seconds.
NOTE: The igniter produces a very intense electrical spark
that ignites the gas.
4. Main burners light and control detects presence of ame.
5. The 30-second HEAT FAN ON delay time begins after the
main burners light.
6. The unit delivers heat to the conditioned space until the
thermostat is satised.
7. The gas valve de-energizes. The induced draft blower
continues operation for a 29-second post-purge.
NOTE: (Single stage models) Ignition control begins timing
the HEAT FAN OFF delay. There is an adjustable HEAT
FAN OFF delay of approximately 120/135/150 seconds
(factory set at 150). 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.
Two-Stage Models:
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.
NOTE: 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 jumper position.
If the call for HEAT remains after the transition delay time
expires, the control will transition from low stage to high
stage.
Two-Stage Models:
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.

13
Two-Stage Models:
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.

1. Thermostat calls for cooling. The compressor and outdoor
fan are energized.
Two-Stage Models:
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.
2. Approximately seven seconds later, the indoor fan starts.
3. The unit will deliver cooling to the conditioned space until
the thermostat is satised.
4. The compressor and outdoor fan will be de-energized when
the thermostat opens.
5. The indoor fan continues to run for approximately 60
seconds after the thermostat is satised.
Two-Stage Models:
The fan runs at low cool speed for the o󰀨 delay period.
This allows additional cooling from the indoor coil to be
transferred to the conditioned space. Then, the indoor fan
stops.
NOTE: A 180-second anti-short cycle is integral to the control and
prevents recycling of the compressor.

1. Thermostat calls for FAN ONLY by energizing “G”.
2. Approximately seven seconds later, the indoor fan starts.
Two-Stage Models:
Indoor fan is energized at low heat speed.
3. The indoor fan continues to run for approximately 60
seconds after “G” is de-energized.
Two-Stage Models:
The indoor fan is immediately de-energized once the
thermostat “G” is de-energized.
STARTUP, ADJUSTMENTS, AND CHECKS

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.
On new installations, or if a major component has been
replaced, 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 recheck for wiring errors, or obstructions
in or near the blower motors. Duct covers must be removed
before operating unit.

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 located on
the burner bracket. The reason for elevated temperatures at
the control should be determined and repaired prior to resetting
this manual reset control.
WARNING
T
O AVOID ERTY D AMAGE, ERSONAL INJURY OR DEATH DUE TO FIRE
OR E LOSION, A QUALIFIED SERVICER M UST INVESTIGATE THE REASON F OR
THE ROLLOUT ROTECTION DEVICE T O EN BEFORE MANUALLY RESETTING
THE ROLLOUT ROTECTION DEVICE.
Rollout Protection

Secondary Limit Control
The secondary limit control is located on the top of the blower
scroll assembly. This control opens when elevated temperatures
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
cycle, it may cause the secondary limit to trip. Once the
blower compartment temperature drops below the limit reset
temperature, the limit will automatically reset.
Secondary
Control Limit
Back of Unit
Secondary Limit Control

1. Close the manual gas valve external to the unit.
2. Turn o󰀨 the electrical power supply to the unit.

14

T O  UNRELIABLE  OR  DAMAGE , THE
I
NLET GAS   MUST BE AS  ON THE UNIT
RATING  WITH ALL OTHER HOUSEHOLD GAS FIRED 
 .
CAUTION
The line pressure supplied to the gas valve must be within the range
specied in the Inlet Gas Supply Pressure table. The supply pressure
can be measured at the gas valve inlet pressure tap or at a hose
tting installed in the gas piping drip leg. The supply pressure must
be measured with the unit OFF. To measure inlet pressure, use the
following procedure.
Pressure Regulator
Adjustment
(Under Cap Screw)
Gas Valve
On/Off
Selector
Switch
INLET
OUTLET
Inlet Pressure
Tap
Outlet Pressure
Tap
White-Rodgers Model 36G22 (Single Stage)
Inlet

Low Fire
Regulator Adjust
High Fire Regulator
Adjust Regulator
Vent
Outlet

White-Rodgers Model 36G54 (Two Stage)
1. Turn OFF gas to furnace at the manual gas shuto󰀨 valve
external to the furnace.
2. Turn OFF all electrical power to the system.
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.
Gas Valve
On/Off
Selector
Switch
INLET OUTLET
White-Rodgers 36G22 (Single Stage)
Inlet

Low Fire
Regulator Adjust
High Fire Regulator
Adjust Regulator
Vent
Outlet

White-Rodgers Model 36G54 (Two Stage)

Gas supply pressure and manifold pressure with the burners
operating must be as specied on the rating plate.
NOTE: Use adapter kit #0151K00000S to measure gas pressure on
White-Rodgers 36G22 and 36G54 gas valves.

15
3. Inlet pressure tap connections:
White-Rodgers 36G22 or 36G54 valve:
Back inlet pressure test screw (inlet pressure boss) out
one turn (counterclockwise, not more than one turn).
4. Attach a hose and manometer to the inlet pressure boss
(White-Rodgers valve).
5. Turn ON the gas supply.
6. Turn On power and close thermostat “R” and “W” contacts,
or “R” and “W1” + “W2” for two-stage models, to provide a
call for heat.
7. Using a leak detection solution or soap suds, check for
leaks at inlet pressure boss plug screw (White-Rodgers
valve). Bubbles forming indicate a leak. SHUT OFF GAS
AND REPAIR ALL LEAKS IMMEDIATELY!
8. Measure the gas supply pressure with burners ring. Adjust
supply pressure using the Inlet Gas Supply Pressure table
shown below. If supply pressure reading di󰀨ers from the
table, make necessary adjustments to pressure regulator,
gas piping size, etc., and/or consult with local gas utility.
Natural Gas Minimum: 5.0" W.C. Maximum: 10.0" W.C.
Propane Gas Minimum: 11.0" W.C. Maximum: 13.0" W.C.
INLET GAS SUPPLY PRESSURE
Inlet Gas Pressure Must be within the Minimum and Maximum Value Shown
in Table Above.
9. Turn OFF all electrical power and gas supply to the system.
10. Remove the manometer hose from the hose barb tting or
inlet pressure boss.
11. Replace inlet pressure tap:
White-Rodgers 36G22 or 36G54 valve:
Turn inlet pressure test screw in to seal pressure port
(clockwise, 7 in-lb minimum).
12. Retest for leaks. If bubbles form, SHUT DOWN GAS AND
REPAIR LEAKS IMMEDIATELY.
13. Turn ON electrical power and gas supply to the system.
14. Turn valve switch ON.


T O  UNRELIABLE  OR  DAMAGE , THE
I
NLET GAS   MUST BE AS  ON THE UNIT
RATING  WITH ALL OTHER HOUSEHOLD GAS FIRED 
 .
CAUTION
This valve is shipped from the factory with the regulator preset (see
control label).
Consult the appliance rating plate to ensure burner manifold pres-
sure is as specied. If another outlet pressure is required, follow
these steps.
1. Turn OFF gas to furnace at the manual gas shuto󰀨 valve
external to the furnace.
2. Turn OFF all electrical power to the system.
3. Outlet pressure tap connections:
White-Rodgers 36G22 or 36G54 valve:
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
(White-Rodgers valve).
5. Turn ON the gas supply.
6. Turn ON power and place unit into a heating cycle.
Single Stage Models (White-Rodgers 36G22 valves): Close
thermostat “R” and “W” contacts.
Two-Stage Models (White-Rodgers 36G54 valve): Close
thermostat contacts “R” and “W1” contacts for low heat stage
heating ONLY; do not energize high stage heat.
7. Using a leak detection solution or soap suds, check for
leaks at outlet pressure boss plug screw (White-Rodgers
valve). Bubbles forming indicate a leak. SHUT OFF GAS
AND REPAIR ALL LEAKS IMMEDIATELY!
8. Measure the gas manifold pressure with burners ring.
Adjust manifold pressure using the Manifold Gas Pressure
table.
9. Regulator adjustment:
Single Stage Models (White-Rodgers 36G22 valves):
Remove regulator cover screw from the outlet pressure
regulator and turn screw clockwise to increase pressure or
counterclockwise to decrease pressure. Replace regulator
cover screw.
Two-Stage Models (White-Rodgers 36G54 valve):
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.
Entergize the “R”, “W1”, and “W2” contacts for high stage
heat. Remove regulator cover screw from the HI outlet
pressure regulator adjust tower and turn screw clockwise
to increase pressure or counterclockwise to decrease
pressure.
Range Nominal
Low Stage 1.6 - 2.2" w.c. 2.0" w.c.
High or Single Stage 3.2 - 3.8" w.c. 3.5" w.c.
Low Stage 5.7 - 6.3" w.c. 6.0" w.c.
High or Single Stage 9.7 - 10.3" w.c. 10.0" w.c.
Manifold Gas Pressure
Gas
Natural
LP
10. Turn OFF all electrical power and gas supply to the system.
11. Remove the manometer hose from the hose barb tting or
outlet pressure boss.
12. Replace outlet pressure tap:
White-Rodgers 36G22 or 36G54 valve: Turn outlet pressure
test screw in to seal pressure port (clockwise, 7 in-lb
minimum).
13. Turn ON electrical power and gas supply to the system.

16
14. Close thermostat contacts to provide a call for heat.
15. Retest for leaks. If bubbles form, SHUT OFF GAS AND
REPAIR ALL LEAKS IMMEDIATELY!
Gas BTU 
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
Example: Natural gas with a heating value of 1000 BTU per cubic
foot and 34 seconds per cubic foot as determined by Step 2, then:
Input = 1000 x 3600 / 34 = 106,000 BTU per Hour. NOTE:
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.
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 orange
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
thermometers 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.
Checking Temperature Rise
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 specied on
the rating plate.
NOTE: Air temperature rise is the temperature di󰀨erence between
supply and return air.
With a properly designed system, the proper amount of
temperature rise will normally be obtained when the unit is
operated 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 blower speed
will increase the temperature rise.
NOTE: 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 airow 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
Measure).
3. Add the two readings together.
NOTE: 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 maximum allowable
statics. Check for closed dampers, dirty lters, undersized
or poorly laid out ductwork.
Blower Speed Adjustments
WARNING
TO AVOID RSONAL I NJURY OR D EATH DUE T O ELECTRIC S HOCK, REMOVE
ELECTRICAL OWER F ROM THE UNIT BEFORE C HANGING EED TA O N THE
BLOWER M OTOR.
Refer to the wiring diagram in the appendix to verify speed
tap settings.
All models are equipped with EEM motors. EEM motors are
constant torque motors with very low power consumption.
This motor is energized by 24V. Adjust the CFM for the unit
by changing the 24V low voltage leads to the speed terminal
block on the motor.
Single Stage Models:
Heating-White Lead Cooling-Yellow Lead
T1 - Low Speed T4 - Low Speed
T2 - Medium Speed T5 - High Speed
T3 - High Speed
Two-Stage Models:
Speed
Tap
Definition
Lead
Color
Speed
Tap
Definition
Lead
Color
T1
Low
Speed Heat
White T3
Low Speed
Cool
Purple
T2
High
Speed Heat
Brown T4
High Speed
Cool
Yellow
T5
High Speed
Cool Hi-Static
HEATING
COOLING
NOTE: Heang airow must be adjusted to provide the temperature rise
shown on rang plate.

17

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 120, 135
or 150 seconds, (single stage models) or 90, 120, 150,
or 180 seconds (two-stage models), depending on the
setting.
Control Board (Single Stage)
L O COOL
HI C OO L
L O HE AT
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
OFF DELAY
F1
RCW1 W2 GY1 Y2
Control Board (Two-Stage)
NOTE: If necessary, adjust fan OFF delay settings to obtain satis-
factory comfort level.
Unit Shutdown
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.

NOTE: Check all manual reset limit controls in heating circuit if
cooling mode does not operate.

The compressor includes components which are designed to
protect the compressor against abnormal operating conditions.
WARNING
T
O EVENT RSONAL I NJURY OR D EATH, ALWAYS D ISCONNECT E LECTRICAL
WER BEFORE I NSCTING OR S ERVICING T HE U NIT.
A
LL CORESSOR
OTECTION D EVICES RESET AUTOMATICALLY, ENERGIZING T HE C ONTACTOR
AND OUTDOOR FAN.

After completing airow measurements and adjustments the
unit’s refrigerant charge must be checked. The unit comes
factory charged, but this charge is based on 325 CFM per ton
and minimum ESP per AHRI test conditions (generally between
.15 -.28 ESP). When air quantity or ESP is di󰀨erent than above,
the refrigerant charge must be adjusted to the proper amount.
All package units with xed orice devices are charged using
the super heat method at the compressor suction line.
After superheat is adjusted it is recommended to check unit
sub-cooling at the condenser coil liquid line out. For charge
adjustments, see superheat and sub-cooling charts shown for
each model. See superheat chart below.
SUPERHEAT

Refrigerant gas is considered superheated whenever its
temperature is higher than the saturation temperature
corresponding to its pressure. The degree of superheat equals
the degrees of temperature increase above the saturation
temperature at existing pressure. See Temperature - Pressure
Chart.
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.
3. Refer to the superheat table provided for proper system
superheat. Add charge to lower superheat or recover
charge to raise superheat.
Superheat Formula = Suct. Line Temp. - Sat. Suct. Temp.

a. Suction Pressure = 143
b. Corresponding Temp. °F. = 50

18
c. Thermometer on Suction Line = 59°F.
To obtain the degrees temperature of superheat, subtract 50.0 from
59.0°F. The di󰀨erence is 9° Superheat. The 9° Superheat would fall
in the ± range of allowable superheat.
CHECKING SUBCOOLING
Refrigerant liquid is considered subcooled when its temperature
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. Compare the hi-pressure reading to the “Required Liquid
Line Temperature” chart. Find the hi-pressure value on
the left column. Follow that line right to the column under
the design subcooling value. Where the two intersect
is the required liquid line temperature. Alternately you
can convert the liquid line pressure gauge reading to
temperature by nding the gauge reading in Temperature
- Pressure Chart and reading to the left, nd the
temperature in the °F. Column.
5. The di󰀨erence between the thermometer reading and
pressure to temperature conversion is the amount of
subcooling.
Subcooling Formula = Sat. Liquid Temp. - Liquid Line Temp.

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 di󰀨erence is 11° subcooling. See the specication sheet
or technical information manual for the design subcooling range
for your unit. See R-410A Pressure vs. Temperature chart.
Cooling Refrigerant Charging (5 Ton Models)
Check unit charge before putting the cooling section into full
operation. The 5 Ton Models have a thermostatic expansion
valve metering 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 outdoor 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 temperature rises the sub-cooling decreases and
as the outdoor ambient temperature lowers, the sub-cooling
increases. NOTE: 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 superheat setting.
Superheat Adjustment (5 Ton Models)
To adjust superheat, remove the control box cover and locate
the expansion valve on the liquid line of the evaporator.
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.
NOTE: The expansion valve will not need adjustment for most
applications. Ensure system superheat is set within range listed on
chart.

NOTE: 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.
TROUBLESHOOTING

The following presents probable causes of questionable
unit operation. Refer to Diagnostic Indicator Chart for an
interpretation of the signal and to this section for an explanation.
Remove the control box access panel and note the number of
diagnostic LED ashes. Refer to Diagnostic Indicator Chart
for an interpretation of the signal and to this section for an
explanation.
Fault Recall (Two-Stage Models ONLY)
The ignition control is equipped with a momentary push-button
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 feature.
Depress the push-button switch for approximately 2 seconds.
NOTE: Do not hold for longer than 4 seconds. Holding
the button for 4 seconds or higher will erase the memory!
Release the switch when the LED is turned o󰀨. The diagnostic
LED will then display the ash codes associated with the last
ve detected faults. The order of display is the most recent fault
to the least recent fault.
Abnormal Operation - Heating
Internal Control Failure
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 fuses, circuit breakers

19
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
established within three (3) consecutive ignition attempts. If
ame is not established within the seven (7) second trial for
ignition, the gas valve is de-energized, 15 second inter-purge
cycle is completed, and ignition is reattempted. The control will
repeat this routine three times if a measurable combustion is
not established. The control will then shut o󰀨 the induced 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 subsequent
attempts, the control will recycle for four (4) consecutive ignition
attempts (ve attempts total) before locking out.
The diagnostic fault code is 1 ash for a lockout due to failed
ignition attempts or ame dropouts. The integrated control will
automatically reset after one hour, or it can be reset by removing
the thermostat signal or disconnecting the electrical power
supply for over ve seconds. If the diagnostic LED indicates
an external lockout, perform the following checks:
• Check the supply and manifold pressures
• Check the gas orices for debris
• Check gas valve for proper operation
• Check secondary limit
A dirty lter, excessive duct static, insu󰀩cient 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.
• Check 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 ue passages,
blocked or cracked heat exchanger, a failed induced
draft blower, or insu󰀩cient 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 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.
• Check wiring
Check wiring for opens/shorts and miswiring.
Important: If you have to frequently reset your gas/
electric package unit, it means that a problem exists that
should be corrected. Contact a qualied 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, 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 diagnostic fault
code is two ashes.

A stuck closed pressure switch can be caused by a faulty
pressure switch or faulty wiring. If the control encounters a
pressure switch stuck closed, the induced draft blower remains
o󰀨. The diagnostic LED code for this fault is three (3) ashes.

If the primary limit switch opens, the gas valve is immediately
de-energized, the induced draft and air circulating blowers are
energized. The induced draft and air circulator blowers remain
energized until the limit switch recloses. The diagnostic fault
code for an open limit is four (4) ashes.
A primary limit will open due to excessive supply air temperatures.
This can be caused by a dirty filter, excessive duct static,
insu󰀩cient 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 automatically reset once the
temperature falls below a preset level.
Primary Limit
A primary limit will open due to excessive supply air
temperatures. This can be caused by a dirty lter, excessive
duct static, insu󰀩cient 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 automatically reset
once the temperature falls below a preset level.
Auxiliary/Secondary Limit
A dirty lter, excessive duct static, insu󰀩cient 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 flame rollout protection device will open.
Possible causes are restricted or blocked flue passages,
blocked or cracked heat exchanger, a failed induced draft
blower, or insu󰀩cient 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.
Flame Detected with Gas Valve Closed
If flame is detected with the gas valve de-energized, the
combustion and air circulator blowers are energized. The
diagnostic fault code is ve (5) ashes for this condition. The
control can be reset by removing the power supply to the unit
or it will automatically reset after one hour. Miswiring is the
probable cause for this fault.
Low Flame Signal (Two-Stage Models ONLY)
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.

20
Abnormal Operation - Cooling
Short Cycle Compressor Delay
The automatic ignition control has a built-in feature that prevents
damage to the compressor in short cycling situations. In the
event of intermittent power losses or intermittent thermostat
operation, the ignition control will delay output to the compressor
contactor for three minutes from the time power is restored.
(Compressor is o󰀨 a total of three minutes). The diagnostic
LED will ash six (6) times to indicate the compressor contactor
output is being delayed.
NOTE: 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 electronic 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.

(5 Ton Models ONLY)
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 operating
pressures. The loss of charge cutout switch protects 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 device opens, the
diagnostic red LED will flash (9) times to indicate that a
refrigeration system pressure switch is open.
MAINTENANCE
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 combustion 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 location of the
return air lter(s) for your unit.
Dirty lters are the most common cause of inadequate heating
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 uncleanable, 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 sunlight.

The coil with the outside air owing over it should be inspected
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 motor
and the combustion fan motor are permanently lubricated. No
additional oiling is required.

A drop in the ame current can be caused by a nearly invisible
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.
NOTE: After cleaning, the microamp signal should be stable and in
the range of 4 - 6 microamps DC.
Flame
Sensor
Flame Sensor

At the start of each heating season, inspect and, if necessary,
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