035-17480-000 Rev. A (800)
2 Unitary Products Group
TABLE OF CONTENTS
GENERAL INFORMATION ................................................. 3
DESCRIPTION ............................................................................3
INSPECTION ..............................................................................3
NOTES, CAUTIONS & WARNINGS ...........................................3
VENT SAFETY CHECK PROCEDURE ......................................4
SPECIFIC UNIT INFORMATION .........................................4
LIMITATIONS & LOCATION .......................................................4
CLEARANCES TO COMBUSTIBLES .........................................5
BELOW FREEZING LOCATIONS ...................................... 5
DUCTWORK ........................................................................5
UPFLOW MODELS ............................................................. 7
FILTER INSTALLATION - UPFLOW ...........................................7
GAS PIPING ........................................................................ 8
ELECTRICAL POWER CONNECTION ...............................9
ELECTRICAL CONTROL CONNECTIONS ...................... 10
COMBUSTION AIR AND VENT SYSTEM ........................ 11
METHOD ONE: TWO PIPE SEALED COMBUSTION
AIR
& VENT SYSTEM .....................................................................11
METHOD TWO: ONE PIPE SYSTEM ..................................................14
METHOD THREE: TWO PIPE SYSTEM USING
COMBUSTION AIR FROM A VENTILATED ATTIC SPACE
......................18
HORIZONTAL VENT APPLICATIONS .............................18
CONDENSATE PIPING .....................................................19
SAFETY CONTROLS ........................................................ 19
START-UP AND ADJUSTMENTS .....................................20
IGNITION SYSTEM SEQUENCE ............................................. 20
CHECKING GAS INPUT ........................................................... 21
ADJUSTMENT OF MANIFOLD GAS PRESSURE ................... 22
ADJUSTMENT OF TEMPERATURE RISE .............................. 23
ADJUSTMENT OF FAN-OFF CONTROL SETTINGS .............. 23
ACCESSORY CONNECTIONS .........................................24
FURNACE ACCESSORIES ............................................25
FILTER PERFORMANCE ..................................................26
APPLYING FILTER PRESSURE DROP TO DETERMINE
SYSTEM AIRFLOW .................................................................. 26
OPERATION AND MAINTENANCE ..................................26
SEQUENCE OF OPERATION .................................................. 26
CONTINUOUS BLOWER ......................................................... 26
INTERMITTENT BLOWER - COOLING ................................... 28
HEATING OPERATIONAL SEQUENCE .................................. 28
MAINTENANCE ........................................................................ 29
BLOWER CARE ....................................................................... 29
VENT/AIR INTAKE ................................................................... 30
TROUBLESHOOTING .......................................................30
FURNACE CONTROL DIAGNOSTICS .............................30
WIRING DIAGRAM - UPFLOW MODELS .........................32
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