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A.O. Smith
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Water Heater
A.O. Smith
BTH 300A, BTH 400A warranty
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US DIRECT VENT
CANADIAN DIRECT VENT
FIGURE 5.
CAUTION
TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULATING TO THE
AIR INTAKE IN WINDY/COLD AREAS, THE MAXIMUM PRACTICAL
DISTANCE BETWEEN THESE TWO TERMINALS IS RECOMMENDED.
Contents
Main
CYCLONE XHE
Series 976, 977
Model BTH 300A AND 400A
COMMERCIAL GAS W ATER HEATER
FOREWORD
ROUGH-IN-DIMENSIONS
GAS VALVE PIPING BTH-300 1 1/4" NPT BTH-400 1 1/4" NPT
WATER TEMPERATURE CONTROL
TABLE OF CONTENTS
FEATURES
Page
WATER TEMPERATURE SETPOINT ADJUSTMENT PROCEDURE
HIGH LIMIT SWITCH (E.C.O.)
DISHWASHING MACHINE REQUIREMENT
CIRCULATING PUMP
INSTALLATION INSTRUCTIONS
REQUIRED ABILITY
INSULATION BLANKETS
LOCATING THE HEATER
CLEARANCES
HARD WATER
AIR REQUIREMENTS
MECHANICAL EXHAUSTING OF ROOM AIR
UNCONFINED SPACE
Page
Page
VENT PIPE TERMINATION
DIRECT VENTING
DIRECT VENT TERMINAL INSTALLATION
INSTALLATION SEQUENCE
VERTICAL VENT TERMINAL INSTALLATION
INSTALLATION SEQUENCE
INSTALLATION OF VENT SYSTEM WARNING
VENT PIPE PREPARATION
CONTROLS AND SWITCHES
BLOWER PROVER SWITCH
BLOCKED OUTLET PROVER SWITCH
BLOCKED INLET PROVER SWITCH
HOT SURFACE IGNITER
GAS PIPING
CONNECTION OF GAS PIPE
PURGING
CAUTION
SYSTEM CONNECTIONS
THERMOMETERS (Not Supplied)
RELIEF VALVE
WARNING
WATER LINE CONNECTIONS
HEATER WIRING
Page
SELF DIAGNOSTIC CONTROLLER
GAS VALVE LED FLASHING
OPERATION
SEQUENCE OF OPERATION
ERROR CODES
FAULT CONDITIONS
Page
ADJUSTMENT PROCEDURE - INITIAL START-UP
PRIOR TO START UP - REQUIRED ABILITY
OPERATING INSTRUCTIONS
LIGHTING AND OPERATION INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE OPERATING
OPERATING INSTRUCTIONS
WARNING
CATHODIC PROTECTION
PRECAUTIONS
GENERAL INFORMATION
POWER BURNER
HIGH LIMIT
HIGH ALTITUDE INSTALLATIONS
WARNING
MAINTENANCE SCHEDULE
FLUSHING
DRAINING
SEDIMENT REMOVAL
LIME SCALE REMOVAL
POWERED ANODE SYSTEM
POWERED ANODE OPERATION
POWER SUPPLY LED MEANINGS:
DRAIN VALVE AND ACCESS P ANELS
RELIEF VALVE
INSTALLATION DIAGRAMS
*
TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE WITH OR WITHOUT BUILDING RECIRCULATION DANGER
Page
Page
TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE WITH RECIRCULATION OF SANITIZING LOOP
Page
CHECKLIST AND SERVICE INFORMATION
BURNER OPERATIONAL PROBLEMS
NOT ENOUGH OR NO HOT WATER
WATER IS TOO HOT
MOTOR WILL NOT RUN
MOTOR RUNS, PREPURGE TIME ELAPSES BUT MAIN FLAME NOT ESTABLISHED
MOTOR RUNS, BURNER LIGHTS MOMENTARILY, THEN LOCKS OUT
NOISY BURNER OPERATION
GAS FAILS TO SHUT OFF
REPLACEMENT PARTS
Model BTH Limited Warranty