COMFORT-AIRE GUH80A, Installation Instructions Manual

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507713-01 Page 1 of 32 Issue 1623
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in
manuals, be alert to the potential for personal injury or death.
As with any mechanical equipment, personal injury can
result from contact with sharp sheet metal edges. Be
careful when you handle this equipment.
CAUTION
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional installer (or
equivalent), service agency or the gas supplier.
WARNING
Manufactured By
Comfort-Aire / Century
1900 Wellworth Ave.
Jackson, MI 49203
This manual must be left with the homeowner for future reference.
INSTALLATION INSTRUCTIONS
GUH80A
Warm Air Gas Furnace
Upflow / Horizontal Left and Right Air Discharge
(P) 507713-01
*P507713-01*
Table of Contents
Unit Dimensions ......................................................................2
GUH80A Gas Furnace .............................................................3
Shipping and Packing List .......................................................3
Safety Information ...................................................................3
Use of Furnace as a Construction Heater ...............................4
General ....................................................................................5
Combustion, Dilution & Ventilation Air .....................................5
Setting Equipment ................................................................... 8
Filters .....................................................................................11
Duct System ..........................................................................11
Venting ...................................................................................12
Gas Piping .............................................................................19
Electrical ................................................................................21
Unit Start-Up ..........................................................................25
Heating Sequence Of Operation ..........................................26
Gas Pressure Adjustment .....................................................26
High Altitude ..........................................................................27
Other Unit Adjustments.......................................................... 28
Service...................................................................................29
Repair Parts List ....................................................................30