2
CIRCULATING AIR AND FILTERS ............................................... 20
Ductwork - Air Flow ......................................................... 20
Filters - Read This Section Before
Installing The Return Air Ductwork ................................ 20
Upright Installations ...................................................... 20
Circulation Air Filters ..................................................... 20
Horizontal Installations ................................................. 21
SEQUENCE OF OPERATION
(INTEGRATED IGNITION CONTROL) ..................................... 21
Power Up ......................................................................... 21
Heating Mode .................................................................. 22
(Mode DIP switch is set to “1 STG” position) ................. 22
(Mode DIP Switch is set to “2 STG” position) ................. 22
Cooling Mode .................................................................. 22
Fan Only Mode ................................................................ 22
START-UP PROCEDURE AND ADJUSTMENT .............................. 23
Furnace Operation .......................................................... 23
Furnace Start-up ............................................................. 23
Furnace Shutdown .......................................................... 23
Gas Supply Pressure Measurement ................................ 23
Gas Manifold Pressure Measurement and Adjustment . 25
Gas Input Rate Measurement (Natural Gas Only) .......... 27
Temperature Rise ............................................................. 27
Circulator Blower Speed Adjustment .............................. 27
Circulator Blower Fan Timing Adjustment ..................... 28
Setting Furnace Operating Mode
(GDH8, GME8, *MH8, AMEH8 & ADSH8 models only) 28
OPERATIONAL CHECKS ............................................................ 28
Checking Duct Static ....................................................... 28
Burner Flame ................................................................... 29
SAFETY CIRCUIT DESCRIPTION ................................................ 29
General ............................................................................ 29
Integrated Control Module ............................................. 29
Primary Limit ................................................................... 29
Auxiliary Limit ................................................................. 29
Rollout Limits .................................................................. 29
Pressure Switches ........................................................... 29
Flame Sensor ................................................................... 30
TROUBLESHOOTING ............................................................... 30
Electrostatic Discharge (ESD) Precautions ..................... 30
Diagnostic Chart ............................................................. 30
Fault Recall ..................................................................... 30
(Furnaces equipped with
PCBBF132 Control Board only) ................................... 30
Resetting From Lockout ................................................... 30
MAINTENANCE ........................................................................ 30
Annual inspection ........................................................... 30
Filters .............................................................................. 31
Filter Maintenance .......................................................... 31
Filter Removal ................................................................. 31
Induced Draft and Circulator Blower Motors ................ 31
Flame Sensor (Qualified Servicer Only) ......................... 31
Igniter (Qualified Servicer Only) .................................... 31
Burners ............................................................................ 31
CLEANING (QUALIFIED SERVICER ONLY) .................................. 31
BEFORE LEAVING AN INSTALLATION ........................................ 32
REPAIR AND REPLACEMENT PARTS .......................................... 32
Component ID .................................................................. 33
APPENDIX D TROUBLESHOOTING CHART ............................... 34
PCBBF134 & PCBBF132 CONTROL BOARDS ................. 34
BLOWER PERFORMANCE DATA ............................................... 37
*M(H/S)8 ......................................................................... 37
GDS8/ADSS8 .................................................................... 38
GHS8 ................................................................................ 38
GDH8 / ADSH8 ................................................................. 39
GME8 ............................................................................... 40
AMEH8 ............................................................................. 41
*(M, D, H)S8 / ADSS8 Wiring Diagram .................................. 42
GME8 / AMEH8 Wiring Diagram ........................................... 43
Honeywell Gas Valve ....................................................... 43
*(M,D)H8 / ADSH8 Wiring Diagram ...................................... 44
Honeywell Gas Valve ....................................................... 44
