COMFORT-AIRE GDD92A, Installation Instructions Manual

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507714-01 Page 1 of 52 Issue 1716
INSTALLATION INSTRUCTIONS
GDD95A & GDD92A
Warm Air Gas Furnace
Downflow Air Discharge
Save these instructions for future reference
(P) 507714-01
*P507714-01*
Manufactured By
Comfort-Aire / Century
1900 Wellworth Ave.
Jackson, MI 49203
This manual must be left with the homeowner for future reference.
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.
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
As with any mechanical equipment, personal injury can
result from contact with sharp sheet metal edges. Be
careful when you handle this equipment.
CAUTION
Table of Contents
Unit Dimensions .......................................................... 2
Parts Arrangement ....................................................... 3
Gas Furnace ................................................................ 4
Shipping and Packing List ........................................... 4
Safety Information ....................................................... 4
General ........................................................................ 6
Combustion, Dilution & Ventilation Air ......................... 6
Installation ................................................................... 9
Filters ......................................................................... 12
Duct System .............................................................. 12
Venting Practices ....................................................... 14
Condensate Piping .................................................... 29
Gas Piping ................................................................. 32
Electrical .................................................................... 34
Unit Start-Up .............................................................. 38
Testing for Proper Venting and Sufficient Combustion
Air for Non-Direct Vent Applications .......................... 42
Other Unit Adjustments.............................................. 43
Blower Performance GDD92A ................................... 44
Blower Performance GDD95A ................................... 45
Service....................................................................... 47
Planned Service ........................................................ 49
Repair Parts List ........................................................ 49
Start-Up & Performance Checklist............................. 50