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American Water Heater (A)BCG38T500-8P manual Gas Control Valve, Measuring Gas Pressures

Models: (A)BCG38T500-8P (A)BCG385T500-8N

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GAS CONTROL VALVE

OPERATION AND SERVICE

GAS CONTROL VALVE

This gas valve is a 24 volt AC combination-step opening valve. It includes two valves assembled in parallel, connected by a wiring harness. Note that the valves have fixed pressure regulation and are not adjustable. However, the manifold (outlet) pressure is adjustable as described on the next page.

IMPORTANT:

•For complete device shut-off, both gas control knobs must be in the OFF position.

•Both gas control knobs must be in the same position for operation or shutoff.

•Do not alter or remove the wiring harness.

•Do not apply a jumper across the valve lead wires or short them together.

Inlet

Inlet Pressure Taps

Gas Control Knobs

Manifold Pressure

Taps

Wiring Harness

Outlet

TOP VIEW OF GAS VALVE

Figure 12

Measuring Gas Pressures

Main Gas

Regulators

(Outlet Pressure

Adjustment)

The supply gas pressure is measured at the inlet pressure tap when the gas is flowing. The manifold gas pressure is measured at the manifold pressure tap when the gas is flowing.

Servicing should only be performed by a Qualiﬁed Service Agent

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American Water Heater (A)BCG38T500-8P, (A)BCG385T500-8N manual Gas Control Valve, Measuring Gas Pressures

Contents

MODELS ABCG385T500-8N ABCG38T500-8P Service HandbookINSTALLATION CONSIDERATIONS - PRE SERVICE CHECKS - OPERATION & SERVICE -TROUBLESHOOTINGCOMMERCIAL GAS WATER HEATER SERVICE MANUAL TABLE OF CONTENTS Servicing should only be performed by a Qualiﬁed Service AgentSERVICE WARNING SERVICE REMINDERINTRODUCTION QUALIFICATIONSREQUIREMENTS INSTRUCTION MANUALTOOLS REQUIRED TOOLS OPTIONALINSTALLATION CONSIDERATIONS WATER PIPINGGAS PRESSURE REQUIREMENTS Closed Water SystemsAIR REQUIREMENTS Air SupplyInsufficient Make-up Air, Negative Air Pressure, and Downdrafts Make-up Air Direct Communication with Outdoors CLEARANCES WATER HEATER Contaminated AirCLEARANCES EXTERIOR VENTING OPERATION AND SERVICE SEQUENCE OF OPERATIONELECTRICAL SEQUENCE WIRING DIAGRAM OPERATION AND SERVICEServicing should only be performed by a Qualiﬁed Service Agent WIRING DIAGRAM FOR ABCG385T500-8N/8POPERATING SEQUENCE - FLOW CHART OPERATION AND SERVICEServicing should only be performed by a Qualiﬁed Service Agent Below 0.1 uA DC Flame SenseGAS CONTROL VALVE Measuring Gas PressuresManifold Pressure Adjustment Main Valve Solenoid ConnectionsGAS CONTROL VALVE/BURNER AREA VIEW OPERATION AND SERVICEServicing should only be performed by a Qualiﬁed Service Agent Honeywell Gas Valve Main Burner ShieldBLOWER PROVER SWITCH - SETTINGS OPERATION AND SERVICE THERMOSTAT AND IGNITION CONTROL BOARD VIEWServicing should only be performed by a Qualiﬁed Service Agent WHITE RODGERS INTEGRATED CONTROL - THERMOSTAT WHITE RODGERS IGNITION CONTROL BOARDOPERATION AND SERVICE Servicing should only be performed by a Qualiﬁed Service AgentPRE-SERVICE CHECKLIST TROUBLESHOOTING IGNITION CONTROL BOARD ERROR CODES1 FLASH System has locked out after 3 trials for ignition 2 FLASHES6 FLASHES Reversed polarity in power supply 3 FLASHES4 FLASHES 7 FLASHESCONTINUOUS FLASH 8 FLASHES Igniter not sensed and/or water heater not groundedCONTINUOUS ON Internal control board failure INTEGRATED HEATER CONTROL DISPLAY LIGHTS INDICATIONACTION STATUSTEST 1 120 VAC TO HEATER CHECK ConditionsTEST thenTEST 2 POLARITY CHECK TROUBLESHOOTINGServicing should only be performed by a Qualiﬁed Service Agent Check from on/off switch center and white wire terminals to groundTEST 3 CONTINUITY CHECK OF HIGH LIMIT ECO ThenSee Ignition Control Board Error Codes TROUBLESHOOTINGTEST 4 UPPER TEMPERATURE PROBE CONTINUITY CHECK OHMS RESISTANCE TABLEOhms TROUBLESHOOTINGTEST 5 CALLING FOR HEAT - NO BLOWER OPERATION TROUBLESHOOTINGServicing should only be performed by a Qualiﬁed Service Agent ConditionsTEST 6 BLOWER ON, NO IGNITION TROUBLESHOOTINGServicing should only be performed by a Qualiﬁed Service Agent Prover SwitchTEST 7 BLOWER ON, BLOWER PROVER SWITCH CLOSED, NO IGNITER OPERATION TROUBLESHOOTINGServicing should only be performed by a Qualiﬁed Service Agent Continuity check - Power off- Plug removed from E4 receptaclesTEST 8 IGNITER HEATS, NO MAIN BURNER TROUBLESHOOTINGServicing should only be performed by a Qualiﬁed Service Agent TESTTEST 9 IGNITER HEATS, NO MAIN BURNER TROUBLESHOOTINGServicing should only be performed by a Qualiﬁed Service Agent ConditionsTEST 10 MAIN BURNER IGNITION FOR LESS THAN FIVE SECONDS TROUBLESHOOTINGServicing should only be performed by a Qualiﬁed Service Agent ConditionsTEST 11 WATER HEATER SHUTTING OFF BELOW SETTING TROUBLESHOOTINGServicing should only be performed by a Qualiﬁed Service Agent WATER HEATER SHUTTING OFF BELOW SETTINGServicing should only be performed by a Qualiﬁed Service Agent Servicing should only be performed by a Qualiﬁed Service Agent P.O. Box 1597, Johnson City, TN Phone 800-456-9805 Fax Copyright 2010 American Water Heater Company. All rights reserved