Table of Contents
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REPLACEMENT PARTS ......................................................... 3
Ordering Parts ................................................................ 3
SAFETY INSTRUCTIONS ....................................................... 3
GENERAL INFORMATION ...................................................... 5
Transportation Damage ................................................. 5
UNIT LOCATION ...................................................................... 7
All Installations: ............................................................ 7
Ground Level Installations Only: ............................... 7
Rooftop Installations Only: ......................................... 7
Roof Curb Installations Only: ..................................... 8
RIGGING DETAILS .................................................................. 7
GAS PIPING ............................................................................. 8
Piping ................................................................................. 8
Gas Piping Checks ........................................................... 9
ELECTRICAL WIRING ............................................................ 10
Thermostat Location ...................................................... 10
24 Volt Dehumidistat Wiring ......................................... 10
Unit Voltage ..................................................................... 11
CIRCULATING AIR AND FILTERS......................................... 11
Airflow Conversion ....................................................... 11
Ductwork .......................................................................... 11
Filters ............................................................................... 12
VENTING ................................................................................... 12
Installation - Flue Hood Exhaust ................................ 12
Installation - Combustion Air Intake Hood ................ 12
CONDENSATE DRAIN ............................................................ 12
Condensate Drain Connection ..................................... 12
NORMAL SEQUENCES OF OPERATION ............................. 12
Heating ............................................................................. 12
Cooling ............................................................................. 13
Fan Only ........................................................................... 13
STARTUP, ADJUSTMENTS, AND CHECKS ......................... 13
Heating Startup ............................................................... 13
Gas Supply Pressure Measurement ............................ 14
and Adjustment ............................................................... 14
Cas BTU Input (Natural Gas Only) Check ................... 15
Temperature Rise Check ................................................ 15
External Static Pressure Check ................................. 16
Blower Speed Adjustments .......................................... 16
EEM Motors ...................................................................... 16
ECM Motors ...................................................................... 16
Limit Check ....................................................................... 16
Unit Shutdown ................................................................. 17
Cooling Startup .............................................................. 17
Compressor Protection Devices ................................. 17
Refrigerant Charge Check ........................................... 17
Superheat ......................................................................... 17
Subcooling ....................................................................... 17
TROUBLESHOOTING ............................................................. 18
Ignition Control Error Codes ..................................... 18
Fault Recall ..................................................................... 18
Resetting from Lockout ................................................ 18
Pressure Sensor ............................................................. 19
Primary Limit .................................................................... 19
Flame Detected with Gas Valve Closed ..................... 19
Low Flame Signal ............................................................ 19
Burner Switch ................................................................. 19
ID Plug ............................................................................... 19
Short Cycle Compressor Delay .................................. 19
High Pressure Switch/Loss of Charge Switch ......... 19
INDEX
MAINTENANCE ........................................................................ 19
Filter Replacement or Cleaning ................................ 20
Cabinet Finish Maintenance .......................................... 20
Clean Outside Coil (Qualified Servicer Only) ......... 20
and Induced Draft Motors .......................................... 20
Flame Sensor (Qualified Servicer Only) ................... 20
Flue Passages (Qualified Servicer Only) ................... 20
Burners Flame ................................................................ 20
ACCESSORIES AND FUNCTIONAL PARTS ........................ 21
Sheet Metal Accessories ............................................... 21
Functional Parts ............................................................. 21
General Information ...................................................... 21
APPENDIX ................................................................................ 22
Diagnostic Chart ............................................................ 22
Unit Dimensions ............................................................... 23
Wiring diagram ................................................................ 22
Minimum Clearances ....................................................... 29
Blower Performance Data ........................................... 30
CFM Output and DIP Switch Settings .......................... 33
Maintenance Recommendations ................................... 34
Start-up Checklist .......................................................... 35
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