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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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Table of Contents
SBN 71-120 thru 85-390, SBD30-150/199 SERVICE HANDBOOK INTRODUCTION.........2
QUALIFICATIONS..................................................................................................................3
TOOLS REQUIRED...............................................................................................................3
COMMERCIAL TANK TYPE GAS MODEL NUMBER BREAK DOWN..................................3
INSTALLATION CONSIDERATIONS - CLEARANCES.........................................................4
TOP AND FRONT VIEWS OF MINIMUM CLEARANCES TO COMBUSTIBLES..................4
MINIMUM CLEARANCE TO COMBUSTIBLES.....................................................................5
REQUIRED EXTERIOR CLEARANCES................................................................................6
REQUIRED EXTERIOR CLEARANCES................................................................................7
INSUFFICIENT MAKEUP AIR ........ NEGATIVE AIR PRESSURE .....DOWNDRAFTS........7
MAKE-UP AIR – DIRECT COMMUNICATION WITH OUTDOORS.......................................8
CONTAMINATED AIR............................................................................................................9
AIR FOR
COMBUSTION – FLAMMABLE ITEMS..................................................................9
GAS VALVE.........................................................................................................................10
GAS VALVE.........................................................................................................................11
VENTING.............................................................................................................................12
VENTING – MULTIPLE CATEGORY I GAS WATER HEATERS.........................................12
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT..................................................13
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT..................................................14
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT..................................................15
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT..................................................16
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT..................................................17
SBN /SBD30-150/199 SEQUENCE OF OPERATION.........................................................18
COMBINED VENTING.........................................................................................................19
9 RULES FOR GOOD VENTING.........................................................................................
20
9 RULES FOR GOOD VENTING.........................................................................................21
9 RULES FOR GOOD VENTING.........................................................................................22
DRAFT PROVING PRESSURE SWITCH - SETTINGS.......................................................23
THERMOSTAT AND IGNITION CONTROL BOARD VIEW.................................................24
WHITE RODGERS INTEGRATED CONTROL - THERMOSTAT........................................25
WHITE RODGERS IGNITION CONTROL BOARD..............................................................26
GAS CONTROL VALVE / BURNER AREA VIEW................................................................27
WIRING DIAGRAM..............................................................................................................28
ELECTRICAL SEQUENCE – SBN, SBD30-150/199...........................................................29
OPERATING SEQUENCE – FLOW CHART........................................................................30
DIAGNOSTIC SEQUENCE OF OPERATION – FLOW CHART..........................................31
PRE-SERVICE CHECK LIST...............................................................................................32
TEST 1 – 120VAC POWER
CHECK ...................................................................................33