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
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