HIGH-EFFICIENCY UPFLOW FURNACE
INSTALLER'S INFORMATION MANUAL
D ES IG N
CE
R TI F I ED
ATTENTION, INSTALLER! After installing the ATTENTION, USER! Your furnace installer should
furnace, show the user how to turn off gas and electricity to give you the documents listed on opposite side. You
the furnace. Point out control and switch locations for should immediately read the User's Information Manual for
turning off gas and electricity. Go over the User's important safety information to keep y ou and your family
Information Manual and Section 23, "Maintaining Furnace safe. Keep these as long as you keep your furnace. Pass
In Good Working Order" in this manual with the user. Make them on to future furnace purchasers or users. If any of the
sure the user understands the importance of following all documents are missing or illegible, contact your installer or
safety precautions, including what could happen if they do furnace manufacturer for replacement. Throughout this
not. manual, when we use the word "you" we refer to the
qualified service technician who is responsible for
Attach the following documents to or adjacent to the application, installation and service of your furnace.
furnace. Tell the user where these documents are located.
? ? Do not store or use gasoline or other flammable vapors
User's Information Manual and liquids in the vicinity of this or any other appliance.
Installer's Information Manual
Parts List ? ? WHAT TO DO IF YOU SMELL GAS
Warranty Information Do not try to light any appliance.
Do not touch any electrical switch.
While these instructions have been written as accurately
Do not use any phone in your building.
and thoroughly as possible, they can not cover every
Immediately call your gas supplier from a neighbor's
system variation or contingency. Questions of
phone. Follow the gas supplier's instructions.
interpretation may arise. For more information, solutions to
If you cannot reach gas supplier, call the fire
particular problems or clarification, contact your local
department.
distributor or the manufacturer.
WARNING: Individuals who install this fu rnace, must have the training and experience necessary to install gas
furnaces. They must also have training and experience necessary to install related comfort air conditioning appliances.
Improper installation could create a hazard, resulting in the possibility of damage, injury or death.
422690 I
TABLE OF CONTENTS
SECTION 1. IMPORTANT SAFETY RULES............................................................................................................. 2
SECTION 2. MEETING CODES .............................................................................................................................. 3
SECTION 3. DETERMINING BEST FURNACE LOCA TION ...................................................................................... 3
SECTION 4. PROVIDING VENTING AND COMBUSTION AIR.................................................................................. 5
SECTION 5. CONDENSATE DRAIN.......................................................................................................................14
SECTION 6. INSTALLING GAS PIPING..................................................................................................................14
SECTION 7. INSTALLING ELECTRICAL WIRING ...................................................................................................15
SECTION 8. SEQUENCE OF OPERATION ............................................................................................................17
SECTION 9. INSTALLING DUCT SYSTEM .............................................................................................................18
SECTION 10. SELECTING AND INSTALLING FILTER CABINETS ..........................................................................18
SECTION 11. CHECKS BEFORE STARTING FURNA CE ........................................................................................20
SECTION 12. GAS SUPPLY PRESSURE AND PILOT ADJUSTMENT.....................................................................20
SECTION 13. MANIFOLD PRESSURE ADJUSTMENT ...........................................................................................21
SECTION 14. CHECKING GAS INPUT RATE .........................................................................................................21
SECTION 15. DERATING FOR HIGH ALTITUDE ....................................................................................................22
SECTION 16. DETERMINING CORRECT ORIFICE SIZE ........................................................................................22
SECTION 17. CHANGING MAIN BURNER ORIFICES ............................................................................................23
SECTION 18. ADJUSTING BLOWER SPEED.........................................................................................................24
SECTION 19. MEASURING DUCT SYSTEM STATIC PRESSURE ..........................................................................24
SECTION 20. MEASURING AIR TEMPERATURE RISE ..........................................................................................25
SECTION 21. CHECKING CONTROLS ..................................................................................................................25
SECTION 22. SETTING BLOWER TIMINGS...........................................................................................................26
SECTION 23. MAINTAINING FURNACE IN GOOD WORKING ORDER...................................................................26
SECTION 24. ACCESSORIES .............................................................................................................................27
SECTION 25. OTHER INFORMATION AND PUBLICATIONS ..................................................................................27
SECTION 1. IMPORTANT SAFETY
WARNING: Use of a non-approved gas (such as
RULES butane) in this furnace could cause sooting or overheating
of heat exchanger.
To alert you to potential hazards, we use the signal words
"WARNING" and "CAUTION" throughout this manual.
"WARNING" alerts you to situations that could cause or Rule 2. Do not install this fu rnace outdoors or in a mobile
result in serious injury or death. "CAUTION" alerts you to home, trailer or recreational vehicle. It is not design
situations that could cause or result in minor or moderate certified for these installations. This furnace is suitable for
injury or property damage. For a safe and reliable a home built on site or a manufactured home completed at
installation be sure to read and follow all warnings and the final site.
cautions.
Rule 3. Air for combustion must not come from a corrosive
We also use the words "must" and "should" in this manual. or contaminated atmosphere. Make sure all combustion
"Must" is mandatory. "Should" is advisory. and ventilation air requirements are adhered to in addition
to local codes and ordinances.
Rule 4. This furnace is not to be used for temporary
WARNING: Read and follow the safety rules in
this section and throughout this manual. Failure to do so heating of buildings or structures under construction.
could cause improper fu rnace operation, resulting in
Rule 5. Provide adequate combustion and ventilation air to
damage, injury or death.
space where furnace is being installed unless combustion
air is provided directly through an inlet air pipe. Connect
Rule 1. Use only gas approved for use in this fu rnace, as this furnace to an approved vent system--venting
indicated on furnace rating plate. Use only natural gas in combustion products outdoors.
furnaces designed for natural gas. Use only propane (LP)
gas in furnaces designed for propane (LP) gas. Make sure Rule 6. Check for gas leaks anytime work is done on gas
furnace will operate properly on the gas type available to supply line, furnace gas control, pilot and pilot line or main
user. Do not use butane gas in this fu rnace. burner manifold.
Rule 7. Never test for gas leaks with an open flame. Use a
commercial soap solution made specifically for leak
detection to check all connections.
Page 2 Installer's Information Manual
Rule 8. Completely seal supply and retu rn air ducts to Provide ample space for servicing and cleaning. Location
furnace casing. Duct system must run to an area outside must allow 30 inches minimum front clearance for service.
furnace room or closet. Seal duct work wherever it runs
through walls, ceilings or floors of fu rnace room or closet.
WARNING: Some insulating materials are
combustible. When a furnace is installed in an attic or other
SECTION 2. MEETING CODES insulated space, keep all insulating materials at least 12
inches away from furnace and combustion air inlet. Failure
This furnace complies with American National Standard to do so could cause a fire.
and National Standard of Canada for Gas Fired Central
Furnaces, ANSI Z21.47 ? CAN/CGA-2.3. It is certified for You may install furnace on non-combustible flooring or on
operation with either natural gas or propane (LP) gas for wood flooring.
indoor installation in a building constructed on site. It meets
the requirement for a 100% shut-off gas control system.
Before installing this furnace, make sure you know all WARNING: Do not install furnace on carpeting,
applicable codes. Be sure to consult local authorities tile or other combustible material except wood flooring.
having jurisdiction over furnaces for information on Doing so could cause a fire.
electrical wiring, gas piping and venting. The installation of
this furnace must conform with local building codes or in the
absence of local codes, with ANSI Z223.1, National Fuel Install furnace so all electrical components are protected
Gas Code or CAN/CGA B149, Canadian Installation Codes. from water.
Electrical wiring must conform with local building codes or Level furnace from front to back and from left to right within
in the absence of local codes, with the current National 1/4 inch. Furnace must be installed level for proper
Electrical Code, ANSI/NFPA 70 or current Canadian condensate drainage. Furnace will not operate if
Electrical Code, CSA C22.1. condensate does not drain.
When furnace is located within the heated space, exhaust
fans can adversely affect its operation. Exhaust fans in
SECTION 3. DETERMINING BEST kitchen, bathrooms, clothes dryers or anywhere within
FURNACE LOCATION heated space, increase combustion air requirements of
non-direct vented furnaces. This is because exhaust fans
reduce the amount of combustion air available to the
You may install this upflow furnace in an alcove, attic,
furnace. A fireplace also reduces amount of combustion
basement, closet, garage or utility room. Do not install
air.
furnace in an area subject to freezing temperatures.
Sufficient air must be provided to ensure there will not be a
This furnace operates best when return-air temperature is
negative pressure in furnace room or space. In addition,
between 55F and 80F. Do not install furnace in a location
there must be a positive seal between fu rnace and return
subject to continuous higher or lower temperatures.
air duct to avoid pulling air from burner area.
Continuous operation outside of this range may shorten
furnace life. When a cooling unit is installed with this fu rnace, the
furnace must be installed parallel with or on the upstream
side of the cooling unit to avoid condensation in furnace
WARNING: Do not install furnace in any other heat exchanger. With a parallel flow arrangement, the
position other than upflow. Doing so could cause heat dampers or other means used to control flow of air must be
exchanger blockage and damage to heat exchanger. adequate to prevent chilled air from entering the furnace
and, if manually operated, must be provided with a means
to prevent operation of either unit unless damper is in the
Select a location that meets all requirements described in full heat or cool position.
this manual for the following:
When furnace is in a residential garage, it must be installed
?? Safety so that pilot and main burners are located no less than 18
?? Minimum Clearances inches above the floor. Also, furnace should be protected
?? Combustion and Ventilation Air from physical damage by vehicles.
?? Venting
?? Duct System When furnace is in a public garage, airplane hanger, or
other building having hazardous atmosphere, install unit in
?? Gas Piping
accordance with recommended good practice requirements
?? Electrical Wiring
of the National Fire Protection Association, Inc. Consult
Locate furnace as near to the center of the air distribution local code authorities for additional location requirements.
system as possible.
See Figure 1 for furnace dimensions and clearances.
Installer's Information Manual Page 3
GAS MOTOR FURNACE RETURN AIR SUPPLY AIR CLEARANCE TO COMBUSTIBLES*** VENT SIZE
INPUT* SIZE* WIDTH** SIZE** SIZE** (INCHES)
(Btu/hr) (HP) "A" "B" "C" TOP SIDES BACK FRONT VENT (INCHES)
54,000 1/3 17 1/2 15 3/4" 15 15/16" 1 0 0 2 0 2
72,000 1/2 17 1/2 15 3/4" 15 15/16" 1 0 0 2 0 2 OR 3
72,000 3/4 20 1/2 18 3/4" 18 15/16" 1 0 0 2 0 2 OR 3
90,000 1/2 17 1/2 15 3/4" 15 15/16" 1 0 0 2 0 2 OR 3
90,000 3/4 20 1/2 18 3/4" 18 15/16" 1 0 0 2 0 2 OR 3
108,000 3/4 23 1/2 21 3/4" 21 15/16" 1 0 0 2 0 3
126,000 3/4 23 1/2 21 3/4" 21 15/16" 1 0 0 2 0 3
* See Furnace Rating Plate located on blower door.
** These are furnace dimensions. See Sections 9 and 10 for proper ductwork and floor opening dimensions.
*** Certified for installation on wood flooring. 30-inch front clearance required for service. 18-inch front clearance required in an alcove.
Figure 1. Furnace Dimensions and Clearances.
Page 4 Installer's Information Manual
?? Some models are shipped with a 3-inch to 2-inch
SECTION 4. PROVIDING VENTING reducer bushing. When venting with two-inch pipe,
install reducer bushing in flue outlet fitting.
AND COMBUSTION AIR
This furnace must be connected to a plastic venting system
adequate to remove flue gases to the outside atmosphere.
It must be vented in accordance with these instructions and
local building codes.
The furnaces covered by this manual are design-certified
as Category IV appliances. Category IV appliances operate
with a positive vent static pressure and with a flue gas
temperature that will produce significant condensate in the
vent. The vent system for this furnace must be installed so
as to prevent leakage of flue gases into the building. This
furnace may be installed using either direct venting or non-
direct venting.
WARNING: Do not connect this furnace to a vent Figure 2. Vent Connection to Furnace.
system shared by any other appliance. Do not connect it to
any other type of vent system other than described by these
instructions. Improper venting could allow combustion PVC PIPE INSTALLATION INSTRUCTIONS
products to collect in building during use resulting in nausea
1. Cut ends of pipe square using a miter box, power saw
or death by asphyxiation.
or PVC tubing cutter. Put a 10 to 15 degree chamfer
on end of pipe. Remove any burrs, dirt, grease, and
moisture. Check joint for proper fit.
GENERAL VENTING GUIDELINES
2. Freely coat outside end of pipe and inside of fitting
socket with cleaner-primer. The purpose of the primer
?? Vent system and combustion air supply components
is to dissolve and penetrate the surface of the pipe.
must be constructed of schedule 40 PVC, PVC-DWV,
Several coats may be necessary to do this.
SDR26, SDR 21 or ABS plastic pipe, fittings, sealants,
and installation procedures that conform to the 3. While primer is still wet, apply a heavy coat of solvent
following ANSI/ASTM standards:
cement to outside of pipe. Next, using outward strokes
PVC ASTM D-1785 to keep excess cement out of socket, apply a generous
coat of cement to the inside of socket.
SDR26, SDR21 ASTM D-2241
PVC-DWV ASTM D-2665 4. While both surfaces are still wet with cement, insert
pipe into fitting socket until it bottoms out, using a slight
PVC-DWV Cellular Core ASTM F-891 twisting motion (1/4 turn). Hold pipe in socket 30
PVC Primer And Solvent Cement ASTM D-2564 seconds to allow cement to set.
ABS Pipe And Fittings ASTM D-2235 5. Allow joint to cure before handling.
Procedure For Cementing Joints ASTM D-2855 Caution: Keep solvent cement container sealed when not
in use. Do not use solvent cement that has thickened or is
?? All condensate formed in the vent must run back gel-like.
toward furnace for proper drainage. Install vent pipe
with no less than a 1/4 inch per foot slope from fu rnace
to vent terminal. WARNING: PVC cements are highly flammable.
Do not use near open flames. A fire or explosion could
?? Install vent pipe without dips or sags that may hold result. Avoid prolonged breathing or contact with skin or
water. Support horizontal portions of vent pipe every 5
eyes.
feet (3 feet for SDR-21 or SDR-26 pipe).
?? Protect vent from freezing. Long runs of vent pipe
installed in an unconditioned space may require
insulation to prevent freezing of condensate.
?? Furnace can be vented from either left or right side.
See Figure 2. As shipped, furnace is setup for venting
through the left side. Right side venting is
accomplished by rotating flue outlet fitting and adding a
street elbow to the drain fitting. Street elbow and
instructions are supplied in the furnace parts package.
Installer's Information Manual Page 5
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