INSTALLATION
INSTRUCTIONS
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
START TO INSTALL YOUR FURNACE.
SAVE THIS MANUAL
TWO-STAGE
ULTRA
HIGH-EFFICIENCY GAS-FIRED
VARIABLE SPEED FURNACES
MODELS
UPFLOW - P*XU - “V” / G9V-UP
60 To 120 MBH Input
DOWNFLOW/HORIZONTAL - P*XD-V / G9V-DH
80 To 120 MBH Input
035-17468-001 Rev. A (801)
TABLE OF CONTENTS
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . 2
SPECIFIC UNIT INFORMATION . . . . . . . . . . . . . . . . . . 3
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ELECTRICAL POWER CONNECTION . . . . . . . . . . . . 12
ELECTRICAL CONTROL CONNECTIONS . . . . . . . . . 13
COMBUSTION AIR AND VENT SYSTEM . . . . . . . . . . 14
CONDENSATE PIPING . . . . . . . . . . . . . . . . . . . . . . . . 22
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . 24
START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . 25
FURNACE ACCESSORIES . . . . . . . . . . . . . . . . . . . . . 29
AIRFLOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
OPERATION AND MAINTENANCE . . . . . . . . . . . . . . . 32
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 35
EFFICIENCY
RATING
CERTIFIED
