Contents
Main
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TABLE OF CONTENTS
INTRODUCTION
QUALIFICATIONS
TOOLS REQUIRED
GENERAL INFORMATION
INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS
GAS PRESSURE SPECIFICATIONS
INSTALLATION QUICK TIPS SUF 120 AND 150 GAS PRESSURE
ADJUSTMENT PROCEDURE: GAS PRESSURE SUF 120 AND 150 MODELS
HIGH ALTITUDE INSTALLATIONS SUF 120 150
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INSTALLATION QUICK TIPS SUF 199 AND 250 GAS PRESSURE
ADJUSTMENT PROCEDURE: GAS PRESSURE SUF 199 AND 250 MODELS
HIGH ALTITUDE INSTALLATION
GAS ORIFICE
INSTALLATION QUICK TIPS SUF 300, 400, 500 GAS PRESSURE
ADJUSTMENT PROCEDURE: GAS PRESSURE SUF 300, 400, 500
HIGH ALTITUDE ADJUSTMENT SUF 300, 400, 500
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INSTALLATION VENTING CATEGORY AND MATERIALS
ULTRA FORCE VENTING
VENTING TABLES SUF 120 250
VENTING TABLES SUF 300, 400, 500
CONCENTRIC VENTING
VENT CONDENSATION
14 Servicing should only be performed by a Qualied Service Agent
E
B
K
V X
v v
G
CBB
F
V X
v v
B
K
J
VENT TERMINATION DIRECT VENT ALL MODELS
DIRECT VENTING ALL MODELS
CONTROL OVERVIEW
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ADJUSTING TANK TEMPERATURE OPERATING SET POINT DIFFERENTIAL
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CHANGING THE DISPLAY UNITS
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FAULT AND WARNING CONDITIONS ADVANCED DIAGNOSTIC INFORMATION
ACCESS TO THE CURRENT FAULT OR WARNING
FAULT CODES
VIEWING THE FAULT HISTORY VIEWING INFORMATION ABOUT THE HEATER
CONTROL SEQUENCE (TYPICAL ALL MODELS)
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CONTROLS CENTRAL CONTROL BOARD CCB
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CONTROLS GAS VALVE SUF 199 AND 250
CONTROLS GAS VALVE, ORIFICE CHART SUF 300/400
CONTROLS GAS VALVE, ORIFICE CHART SUF 500
CONTROLS PRESSURE SWITCHES ALL MODELS
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CONTROLS CONNECTIONS, IGNITER, FLAME SENSOR, SIGHT GLASS, POWERED ANODES
HOT SURFACE IGNITER / FLAME SENSOR / CONTROL TIMING
BLOWER SPEED CONTROL SUF 199 AND 250
VARIABLE FREQUENCY DRIVE SUF 400 AND 500
VARIABLE FREQUENCY DRIVE BLOWER SPEED AND PRESSURE READINGS
WIRING DIAGRAM SUF 120 300
B (CENTRAL CONTROL BOARD)CC
120 VAC 1 POWER
N
L
WIRING DIAGRAM SUF 400, 500
LOWER TEMPERATURE PROBE
COMBUSTION BLOWER
N
L