508416-01 Issue 2338 Page 1 of 77
SERVICE MANUAL
A97US2V Gas Furnace with 107046-XX Control
(P) 508416-01
*P508416-01*
Table of Contents
Technical Specications - A97US2V............................2
Parts Arrangement.......................................................6
Unit Components .........................................................7
Placement and Installation ........................................29
Joint Cementing Procedure .......................................30
Venting Practices .......................................................31
Vent Piping Guidelines ..............................................35
Condensate Piping ....................................................48
Start-Up .....................................................................53
Heating System Service Checks ...............................54
Proper Ground and Voltage ....................................... 57
Typical Operating Characteristics .............................. 58
Maintenance ..............................................................59
Wiring and Sequence of Operation ...........................62
Field Wiring Applications with Conventional Thermostat
...................................................................................68
Program Unit Capacity Size Modes...........................72
Troubleshooting: Heating Sequence of Operation ....73
Troubleshooting: Cooling Sequence of Operation ..... 76
Troubleshooting: Continuous Fan Sequence of
Operation ...................................................................77
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.
Electric shock hazard.
Can cause injury or death. Before attempting
to perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
WARNING
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves
and protective clothing.
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 HVAC installer (or
equivalent), service agency or the gas supplier.
WARNING
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