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ATTENTION INSTALLERS:

It is your responsibility to know this product better than your 
customer. This includes being able to install the product according 
to strict safety guidelines and instructing the customer on how to 
operate and maintain the equipment for the life of the product. 
Safety should always be the deciding factor when installing this 
product and using common sense plays an important role as well. 
Pay attention to all safety warnings and any other special notes 
highlighted in the manual. Improper installation of the furnace 
or failure to follow safety warnings could result in serious injury, 
death, or property damage. 

These instructions are primarily intended to assist qualifi ed 
individuals experienced in the proper installation of this appliance. 
Some local codes require licensed installation/service personnel 
for this type of equipment. Please read all instructions carefully 
before starting the installation. Return these instructions to the 
customer’s package for future reference.

GAS FURNACES

Single Stage High Effi ciency Furnaces

Installation Instructions

*SA Upfl ow/Horizontal Model

*SK Downfl ow Model

80+ AFUE

DO NOT DESTROY. 

KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

FIRE OR EXPLOSION HAZARD

• Failure to follow safety warnings exactly 

could result in serious injury or property 
damage.

• Installation and service must be performed 

by a qualifi ed installer, service agency or 
the gas supplier.

• Do not store or use gasoline or other 

fl ammable vapors and liquids in the 
vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.
• Do not touch any electrical switch; do not 

use any phone in your building.

• Leave the building immediately.
• Immediately call your gas supplier from a 

neighbors phone. Follow the gas suppliers 
instructions.

• If you cannot reach your gas supplier, call 

the fi re department.

WARNING:

• PROPOSITION 65 WARNING: This product 

contains chemicals known to the state of 
California to cause cancer, birth defects or 
other reproductive harm.

•  This furnace is not approved for installation 

in mobile homes. Installing this furnace in 
a mobile home could cause fi re,  property 
damage, and/or personal injury.

WARNING:

Summary of Contents for 045C-23ASA

Page 1: ...future reference GAS FURNACES Single Stage High Efficiency Furnaces Installation Instructions SA Upflow Horizontal Model SK Downflow Model 80 AFUE DO NOT DESTROY KEEP IN A SAFE PLACE FOR FUTURE REFERE...

Page 2: ...n Air Inlet 9 Bottom Return Air Inlet 9 Horizontal Installation 9 Bottom Panel Removal 10 Downflow Installation 10 Installation on a Concrete Slab 10 VENTING REQUIREMENTS 12 Category I Venting 12 Hori...

Page 3: ...naces 24 Figure 16 Downflow Furnaces 25 Airflow Data 26 Table 2 Upflow Horizontal Gas Furnaces 26 Table 3 Downflow Gas Furnaces 28 Electrical Information 29 Table 4 Wire length and Voltage Specs 29 Ta...

Page 4: ...ting outside the space containing the furnace This furnace may be used for temporary heating of buildings or structures under construction See the guidelines listed on page 5 Agas firedfurnaceforinsta...

Page 5: ...equires redundant inspections Serial numbers for furnaces used during construction must be submitted in writing fax and email also acceptable This information will be used to track the long term affec...

Page 6: ...ance from the front of the unit is 36 inches The need to provide clearance for access to panels or doors may require clearance distances over and above the requirements COMBUSTION AIR REQUIREMENTS Gen...

Page 7: ...ppliance input The openings shall exchange directly or by ducts with the outdoor spaces crawl or attic that freely exchange with the outdoors Figure 3 Figure 3 Combustion Air Drawn from a Crawl Space...

Page 8: ...sq In 6 inches 140 000 35 sq In 7 inches 160 000 40 sq In 8 inches Furnace 12 Max Water Heater Vent or Chimney NOTES Each opening must be at least 100 sq in or 1 sq in per 1 000 Btuh of total input ra...

Page 9: ...nstalled horizontally in an attic basement crawl space or alcove Figure 6 It can also be suspended from a ceiling in a basement or utility room in either a right to left airflow or left to right airfl...

Page 10: ...built cased air conditioning coil However the plenum attached to the coil casing must be installed so that its surfaces are at least 1 from combustible construction Installation on a concrete slab 1 C...

Page 11: ...en 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...

Page 12: ...ventingsystemwillneed to be modified to comply with NFGC or local codes The venting system should be designed to have the minimum number of elbows or turns All horizontal runs shall slope upwards from...

Page 13: ...uding carbon monoxide poisoning that could result in personal injury or death All return ductwork must be secured to the furnace with sheet metal screws For installations in confined spaces all return...

Page 14: ...work may be connected to the left side right side or bottom The bottom panel Figure 15 page 24 must be installed for left or right return air NOTE Do not use the back of the furnace for return air Sid...

Page 15: ...o avoid unwanted noise and or damage to the furnace A typical gas service hookup is shown in Figure 11 Leak Check WARNING FIRE OR EXPLOSION HAZARD Never test for gas leaks with an open flame Check all...

Page 16: ...ecessaryforhigh altitude installation may only be accomplished with factory supplied orifices Do not attempt to drill out orifices in the field Improperly drilled orifices may cause fire explosion car...

Page 17: ...tor for the proper upgrade motor kit IMPORTANTNOTE Settheheatanticipatoraccording to the instructions supplied by the thermostat manufacturer To determine the heat anticipator setting 1 Add the curren...

Page 18: ...s on the terminal strip of the circuit board Verify the gas line service pressure does not exceed 10 0 inches of W C and is not less than 4 5 inches W C for natural gas For LP gas the line service pre...

Page 19: ...er to avoid false readings 2 Adjust all registers and duct dampers to the desired positionandrunthefurnacefor10to15minutesbefore taking any temperature readings The temperature rise is the difference...

Page 20: ...ir Limit Switch Note A properly functioning limit switch should turn off the gas valve when the return is blocked time depends on how well the return air is blocked The circulating air and combustion...

Page 21: ...that they were removed 12 Follow the lighting instructions found on the furnace door to return the furnace to operation Verify proper operation after servicing Cleaning Of Flue Passages If the flue p...

Page 22: ...of combustion products into the living space can create potentially hazardous conditions including carbon monoxide poisoning that could result in personal injury or death Check the vent pipe and or ch...

Page 23: ...Right Side 0 In Vent 1 In Back 0 In Top 1 In Front 4 In These are the listed clearances to combustible materials Allow 24 in minimum clearance for servicing Recommended clearance is 36 in The furnace...

Page 24: ...r N Dimensions shown in Inches Figure 15 SA 80 High Efficiency Upflow Horizontal Furnaces D 23 A 23 28 34 15 1 25 1 X 3 HOLE FOR GAS C 19 B 23 22 21 22 29 22 25 1 X 3 X 45 HOLE FOR GAS 4 KNOCKOUTS BOT...

Page 25: ...B FRONT BRACE 7 RIGHT SIDE LEFT SIDE BOTTOM VIEW FLANGES TOP VIEW 19 ACCEPTS 4 TYPE B VENT PIPE Figure 16 SK 80 High Efficiency Downflow Furnaces SK Model s Dimension A Dimension B Dimension C Dimensi...

Page 26: ...685 32 1 645 32 1 590 34 1 550 34 1 485 36 1 415 38 Med High 1 400 38 1 360 39 1 340 40 1 310 41 1 275 42 1 245 43 1 190 45 1 125 47 Med Low 1 235 43 1 215 44 1 180 45 1 155 46 1 130 47 1 100 48 1 060...

Page 27: ...65 1 175 68 SA108 35C Side Return 108 000 High 2 295 35 2 235 36 2 180 37 2 110 38 2 050 39 1 975 41 1 900 42 1 810 44 Med High 2 130 38 2 075 39 2 035 39 1 970 41 1 915 42 1 845 43 1 765 45 1 675 48...

Page 28: ...60 43 1 520 44 1 475 45 Med High 1 330 50 1 315 51 1 300 51 1 280 52 1 255 53 1 230 54 1 200 56 1 150 58 Med Low 1 180 56 1 165 57 1 150 58 1 135 59 1 115 60 1 090 61 1 060 63 1 010 66 Low 940 71 925...

Page 29: ...103 9 0 14 15 126 45D 126 000 24 115 60 1 127 103 15 2 12 30 NOTES can be C or N Time delay fuses or HACR type circuit breakers are required Thermostat Wire Gauge Recommended Thermostat Wire Length 2...

Page 30: ...K BLACK BLACK BLUE BLUE BLUE BLUE BLUE ORANGE BLUE GREEN BLUE BLACK BLACK WHITE BLACK WHITE WD 710731 C FIELD WIRING LEGEND LOW VOLTAGE HIGH VOLTAGE For 80 and 90 Single Stage Furnaces SINGLE STAGE TH...

Page 31: ...176 353 48 75 375 750 104 35 173 346 50 72 360 720 106 34 170 340 52 69 346 692 108 33 167 333 54 67 333 667 110 33 164 327 56 64 321 643 112 32 161 321 58 62 310 621 114 32 158 316 60 60 300 600 116...

Page 32: ...HIGH HIGH Table 9 Natural Gas Heating Values Table 8 High Altitude Deration Chart for Propane Gas PROPANE GAS ALTITUDE ABOVE SEA LEVEL INPUT BTU 45 000 54 000 72 000 90 000 108 000 126 000 0 to 1 999...

Page 33: ...LD PRESSURE 9 000 to 9 999 FT 51 49 49 49 49 49 ORIFICE SIZE 2 6 2 8 2 8 2 8 2 8 2 8 MANIFOLD PRESSURE Table 11 High Altitude Deration Chart for Natural Gas Low Heating Value NATURAL GAS LOW HEATING V...

Page 34: ...34...

Page 35: ...OW ML MH HIGH EAC L1 XFMR HUM 24V L1A 5 NEUTRALS 2 6 3 4 1 7 8 9 5 2 6 3 4 1 FAN 8 4 7 3 11 1 9 10 13 12 2 5 6 ITEM COMPONENT NAME 1 Blower Assembly 2 Blower Door Switch 3 Burner Assembly 4 Combustion...

Page 36: ...esh air supply for combustion and ventilation YES NO Installation Altitude ____________________ FT Deration Percentage ___________________ Furnace Input _______________________ Btuh Supply Air Tempera...

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