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
