American Water Heater Commercial Ultra Low NOx Gas water Heater User Manual

NOTE: Anode must remain installed (except for inspection) to

avoid shortening tank life. See LIMITED WARRANTY. Replace

as necessary.

SERVICE AND REPAIR

The water heater requires no special care other than the normal

maintenance as noted above. If you are having a problem with your

water heater, before calling for service please refer to the following

TROUBLESHOOTING sections. If service becomes necessary,

contact your dealer, installer or an authorized service agent. Do not

attempt to repair the water heater yourself. Any work performed by

unauthorized personnel may void the warranty.

Please be sure to provide the following information when writing or

e-mailing:

• Model Number

• Serial Number

• Date of Original Purchase

• Date Problem Originated

• Explanation of Problem

Also, please be sure to include a daytime telephone number.

TROUBLESHOOTING

Water heaters may exhibit problems that are unrelated to a

malfunction of the water heater itself. The following information and

tables may serve to answer your question about a problem that you

are having without having to call a service agent.

For your safety, water heater service should be performed only

by a qualified service technician. Read the GENERAL SAFETY

INFORMATION section first.

WATER HEATING CYCLE

(GAS AND ELECTRIC POWER ARE ON,“OFF/ON” SWITCH IS ON)

1) CALLS FOR HEAT

A) THERMOSTAT SENSES NEED FOR HEATING WATER

B) CONTACTS CLOSE IN THERMOSTAT, POWER (115 VAC)

FLOWS TO BLOWER MOTOR

2) BLOWER MOTOR ROTATES BLOWER WHEEL

A) BLOWER WHEEL SPEED INCREASES

B) WHEEL SPEED INCREASES, AIR PRESSURE SWITCH

CONTACTS CLOSE

3) 120 VAC FLOWS TO HOT SURFACE IGNITER

NOTE: THE CONTROL MODULE ON THIS UNIT WILL TRY A

MAXIMUM OF THREE TIMES TO LIGHT THE UNIT. CYCLE CAN

BE RESTARTED AT ANY TIME BY TURNING OFF SWITCH AND

THEN TURNING BACK ON. IF UNIT HAS GONE THROUGH

THREE CYCLES AND DID NOT LIGHT, THEN REPAIRMAN

SHOULD BE CALLED TO CHECK OPERATION OF HEATER.

4) MAIN BURNER IGNITES

A) GAS FLOWS TO MAIN BURNER PORTS AND IS IGNITED

5) GAS VALVE SENSES BURNER FLAME

6) BURNER HEATS WATER

A) BURNER HEATS WATER TO THERMOSTAT SETTING

B) CONTACTS IN THERMOSTAT OPEN,

C) CYCLE IS COMPLETED