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CONTENTS
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 3
SPECIFIC UNIT INFORMATION . . . . . . . . . . . . . . . 4
UPFLOW MODELS . . . . . . . . . . . . . . . . . . . . . . . . . 8
DOWNFLOW / HORIZONTAL MODELS -
HORIZONTAL APPLICATION . . . . . . . . . . . . . . . . 11
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ELECTRICAL POWER CONNECTION . . . . . . . . . 13
ELECTRICAL CONTROL CONNECTIONS . . . . . . 14
COMBUSTION AIR AND VENT SYSTEM . . . . . . . 15
HORIZONTAL VENT APPLICATIONS . . . . . . . . . 24
CONDENSATE PIPING . . . . . . . . . . . . . . . . . . . . . 24
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . 26
START-UP AND ADJUSTMENTS . . . . . . . . . . . . . 27
FURNACE ACCESSORIES . . . . . . . . . . . . . . . . . . 32
AIRFLOW DATA - UPFLOW . . . . . . . . . . . . . . . . . 33
AIRFLOW DATA - DOWNFLOW/HORIZONTAL . 33
OPERATION AND MAINTENANCE . . . . . . . . . . . 34
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 37
FURNACE CONTROL DIAGNOSTICS . . . . . . . . . 37
WIRING DIAGRAM - UPFLOW MODELS . . . . . . . 39
WIRING DIAGRAM - DOWNFLOW/HORIZONTAL 40
INSTALLATION
INSTRUCTION
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
START TO INSTALL YOUR FURNACE.
SAVE THIS MANUAL
HIGH EFFICIENCY
GAS-FIRED FURNACES TUBULAR
HEAT EXCHANGER SERIES
UPFLOW MODELS: P*UR / FG9-UP / G9T-UP
40 - 140 MBH INPUT
DOWNFLOW/HORIZONTAL MODELS: P*DH / FG9-DH / G9T-DH
40 - 120 MBH INPUT
035-14370-000 REV A (899)
Form 650.75-N4U