2
HIGH ALTITUDE ....................................................................... 3
Replace ID Plug
............................................................... 3
Adjusting Gas Manifold Pressure
.............................. 3
REPLACEMENT PARTS ......................................................... 3
Ordering Parts
................................................................ 3
SAFETY INSTRUCTIONS ....................................................... 3
To the Installer
............................................................... 3
Safety Considerations
................................................... 4
GENERAL INFORMATION ...................................................... 5
Transportation Damage
................................................. 6
UNIT LOCATION ...................................................................... 7
All Installations:
............................................................ 7
Ground Level Installations Only:
............................... 7
Rooftop Installations Only:
......................................... 8
Roof Curb Installations Only:
..................................... 8
RIGGING DETAILS .................................................................. 8
GAS PIPING ............................................................................. 9
Piping
................................................................................. 9
Gas Piping Checks
........................................................... 10
ELECTRICAL WIRING ............................................................ 10
Thermostat Location
...................................................... 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 ............................. 13
Heating
............................................................................. 13
Cooling
............................................................................. 13
Fan Only
........................................................................... 13
STARTUP, ADJUSTMENTS, AND CHECKS
......................... 13
Heating Startup
............................................................... 13
Gas Supply Pressure Measurement
............................ 14
Gas Manifold Pressure Measurement
and Adjustment
............................................................... 15
Gas BTU Input Check
...................................................... 15
Temperature Rise Check
................................................ 16
Checking Temperature Rise
.......................................... 16
External Static Pressure Check
................................. 16
Blower Speed Adjustments
.......................................... 16
EEM Motors
...................................................................... 16
Limit Check
....................................................................... 17
Unit Shut Down
................................................................ 17
Compression Protection Devices
................................ 17
Refrigerant Charge Check
........................................... 17
Cooling Refrigerant Charging (Models with TXV)
.. 17
Superheat Adjustment
................................................... 17
Cooling Startup
.............................................................. 17
SUPERHEAT ............................................................................ 18
TROUBLESHOOTING ............................................................. 18
Ignition Control Error Codes
..................................... 18
Fault Recall
..................................................................... 18
Resetting from Lockout
................................................ 19
Pressure Sensor
............................................................. 19
Primary Limit
.................................................................... 19
Flame Detected with Gas Valve Closed
..................... 19
Low Flame Signal
............................................................ 19
Burner Temperature Switch
......................................... 19
ID Plug
............................................................................... 20
Abnormal Operation - Cooling
Short Cycle Compressor Delay
.................................. 20
High Pressure Switch / Low Pressure Switch
.......... 20
MAINTENANCE ........................................................................ 20
Filter Replacement or Cleaning
................................ 20
Cabinet Finish Maintenance
.......................................... 20
Clean Outside Coil (Qualified Servicer Only)
.......... 20
Condenser, Evaporator,
and Induced Draft Motors
.......................................... 20
Flame Sensor (Qualified Servicer Only)
................... 20
Flue Passages (Qualified Servicer Only)
................... 20
Cleaning Flue Passages (Qualified Servicer Only)
. 20
Burners
............................................................................. 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
................................................................ 24
Minimum Clearances
....................................................... 26
Recommended Filter Size
............................................... 26
Blower Performance Data
........................................... 27
Homeowner’s Routine
Maintenance Recommendations
................................... 29
Start-up Checklist
.......................................................... 30
TABLE OF CONTENTS