Use and Care Manual

ManualsBrandsCentury ManualsHeating, Ventilation, and Air Conditioning95 Percent 120,000 Input BTU 114,000 Output BTU Natural Gas Forced Hot Air Furnace

GAS FURNACES

USER’S MANUAL

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qualiedinstaller,serviceagencyorthe

gassupplier.

• Do not store or use gasoline or other

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redepartment.

WARNING:

SingleStage&Two-StageFurnaces

NON-CONDENSINGGASFURNACES

CONDENSING GAS FURNACES

GUH92AUpow/Horizontal

Furnaces

GDD95ADownow

Furnaces

GUH95A&GUH95TUpow/

HorizontalFurnaces

GUH80AUpow/Horizontal

Furnaces

80+ AFUE

GDD80ADownow

Furnaces

GDD92ADownow

Furnaces

92.1%AFUE

95%+AFUE

DONOTDESTROYTHISMANUAL.KEEPINASAFEPLACEFORFUTUREREFERENCE.

Summary of content (12 pages)

PAGE 1
Single Stage & Two-Stage Furnaces GAS FURNACES USER’s MANUAL NON-CONDENSING GAS FURNACES CONDENSING GAS FURNACES 92.1% AFUE 80+ AFUE 95%+ AFUE GUH80A Upflow / Horizontal Furnaces GUH92A Upflow / Horizontal Furnaces GUH95A & GUH95T Upflow / Horizontal Furnaces GDD80A Downflow Furnaces GDD92A Downflow Furnaces GDD95A Downflow Furnaces WARNING: FIRE OR EXPLOSION HAZARD • Failure to follow safety warnings exactly could result in serious injury or property damage.
PAGE 2
PAGE 3
TABLE OF CONTENTS IMPORTANT SAFETY INFORMATION.........4 Gas Supply & Piping...................................4 Venting System..........................................4 Clearances to Combustibles.......................5 Sources of Corrosion..................................5 Filter............................................................5 Flood Damage............................................5 About the furnace................................6 Introduction.............................................
PAGE 4
Important SAFETY INFORMATION Safety markings are used frequently throughout this manual to designate a degree or level of seriousness and should not be ignored. WARNING indicates a potentially hazardous situation that if not avoided, could result in personal injury or death. CAUTION indicates a potentially hazardous situation that if not avoided, may result in minor or moderate injury or property damage.
PAGE 5
Important SAFETY INFORMATION detector in hallways near the bedrooms in each sleeping area. CO detectors should be certified to the most recent requirements of the UL, IAS OR CSA Standard and should be installed, operated, and maintained in accordance with the detector manufacturers instructions. CAUTION: This furnace requires unrestricted airflow for combustion and ventilation.
PAGE 6
About the furnace Introduction Congratulations on the purchase on your new furnace! With our dedication to quality, superior reliability, and outstanding warranty, we know you will be pleased with this new appliance. This furnace has been designed and built to provide many years of safe and dependable home comfort, providing it is properly installed and regular maintenance has been performed.
PAGE 7
COMPONENT LocationS for Non-Condensing Type Furnaces Single Stage Models Inducer Assembly Blower Assembly (behind blower panel) Furnace Control Board Gas Valve Pressure Switch Transformer Blower Door Switch (behind blower panel) Flame Sensor Gas Manifold Igniter Blower Door Switch Roll-Out Switch Burner Assembly Furnace Control Board Combustion Tube Main Air Limit Switch Transformer Pressure Switch Inducer Assembly Gas Valve Main Air Limit Switch Gas Manifold Igniter Burner Assembly Blower
PAGE 8
Flame Sensor Finish Flange Gas Manifold Finish Flange Burner Assembly Roll-Out Switch Main Air Limit Switch Blower Assembly (behind blower panel) Furnace Control Board Igniter Gas Valve Inducer Limit Switch Blower Door Switch Furnace Control Board Inducer Pressure Switch (behind blower panel) Transformer Condensate Pressure Switch Inducer Assembly Inducer Limit Switch Inducer Assembly Transformer Blower Door Switch Pressure Switch Gas Valve Flame Sensor Igniter Burner Assembly Blowe
PAGE 9
STARTUP & SHUTDOWN STARTING THE FURNACE 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. Make sure the filter is clean and in place. Make sure the vent system is properly installed. Set the thermostat to the lowest setting. Close the manual gas valve outside the furnace. Turn off all electric to the furnace. Remove the door from the burner compartment. Set the gas valve switch or knob to the OFF position. See Figure 1 for gas valve switch or knob location. Wait 5 minutes.
PAGE 10
Maintenance & Inspection FURNACE & AIR DUCTS BLOWER & FILTER • The furnace should be inspected annually by a licensed HVAC technician. Table 1 below contains suggested inspections and frequency of maintenance. • Homeowners should perform frequent visual inspections of the furnace for obvious signs of deterioration. The furnace should be secure without sagging, cracks gaps, etc around the base.
PAGE 11
PAGE 12
¶ ¶ GUH95A, GDD95A, & GUH95T Models Only Specifications & illustrations subject to change without notice or incurring obligations. Jackson, MI | Printed in U.S.A.