GMES8 GCES8 Installation Instructions
2
ELECTRICAL CONNECTIONS................................................... 15
W iring Harness ............................................................... 15
115 Volt Line Connections ............................................. 16
Fossil Fuel Applications .................................................. 16
Junction Box Relocation ................................................. 16
24 Volt Thermostat W iring ............................................ 16
GM E8 & AMEH8 Furnaces
with 2-Stage Condenser Field Wiring........................17
Setting the Heat Anticipator .......................................... 17
115 Volt Line Connection of Accessories.......................17
Electronic Air Cleaner ..................................................... 17
24 Vac Humidifier ........................................................... 17
GAS SUPPLY AND PIPING ...................................................... 18
High Altitude Derate ....................................................... 18
Propane Gas Conversion ................................................ 18
Gas Piping Connections.................................................. 19
Upflow Installations........................................................ 20
Counterflow Installations ............................................... 20
Gas Piping Checks ........................................................... 20
Propane Gas Tanks and Piping ....................................... 21
CIRCULATING AIR AND FILTERS............................................. 22
Ductwork - Air Flow ........................................................ 22
Filters - Read This Section Before
Installing The Return Air Ductwork ................................ 22
Upright Installations ....................................................... 22
Circulation Air Filters ...................................................... 22
Horizontal Installations .................................................. 23
SEQUENCE OF OPERATION
(INTEGRATED IGNITION CONTROL) ................................... 23
Power Up ......................................................................... 23
Heating M ode ................................................................. 24
Cooling M ode .................................................................. 24
Fan Only Mode ............................................................... 24
START-UP PROCEDURE AND ADJUSTM ENT .......................... 25
Furnace Operation .......................................................... 25
Furnace Start-up ............................................................. 25
Furnace Shutdown .......................................................... 25
Gas Supply Pressure M easurement .............................. 25
Gas M anifold Pressure M easurement and Adjustment 28
Gas Input Rate M easurement (Natural Gas Only) ........29
Temperature Rise ............................................................ 29
Circulator Blower Speed Adjustment ............................ 29
Circulator Blower Fan Timing Adjustment ....................30
OPERATIONAL CHECKS.......................................................... 30
Checking Duct Static ....................................................... 30
Burner Flame .................................................................. 31
SAFETY CIRCUIT DESCRIPTION .............................................. 31
General ............................................................................ 31
Integrated Control M odule ............................................31
Primary Limit .................................................................. 31
Auxiliary Limit ................................................................. 31
Rollout Limits .................................................................. 31
Pressure Switches ........................................................... 31
Flame Sensor ..................................................................31
TROUBLESHOOTING .............................................................. 32
Electrostatic Discharge (ESD) Precautions ..................... 32
Diagnostic Chart ............................................................. 32
Fault Recall ...................................................................... 32
Resetting From Lockout ................................................. 32
M AINTENANCE...................................................................... 32
Annual inspection ........................................................... 32
Filters .............................................................................. 32
Filter M aintenance ......................................................... 33
Filter Removal ................................................................. 33
Induced Draft and Circulator Blower M otors ................ 33
Flame Sensor (Qualified Servicer Only) ......................... 33
Igniter (Qualified Servicer Only) ..................................... 33
Burners ............................................................................ 33
CLEANING (QUALIFIED SERVICER ONLY) ............................... 33
BEFORE LEAVING AN INSTALLATION ..................................... 33
REPAIR AND REPLACEM ENT PARTS ...................................... 34
Component ID ................................................................. 35
APPENDIX D TROUBLESHOOTING CHART............................. 36
CONTROL BOARDS ...................................................... 36
BLOWER PERFORM ANCE DATA ............................................. 39
* M ES80 / CES80 ............................................................. 39
* M ES80 / * CES80 Wiring Diagram ...................................... 50