Install Instructions

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Technical Service Department
Technical Service Bulletin
1-800-432-8373
PCB Replacement Procedure
(For models with 2-42, 53, 74 within the model number)
WARNING: You will need to perform this procedure when you replace the PCB. Without
this adjustment, the water heater may not function properly.
Note: During the adjustment procedure if [EE] is displayed on the display of remote
control, adjust again with caution. This means there was an error in the adjustment
sequence.
Note: Read these entire instructions before starting this procedure.
When replacing the printed circuit board, perform the following sequence of steps:
1.Turn off power at remote.
2. Disconnect electric power from water heater.
3. Turn off gas supply to the water heater.
4. Turn off water supply to the water heater.
5. Remove the front cover.
6. Reconnect electric power to the water heater (no need to turn on power at the remote).
7. With old PCB installed verify minimum manifold pressure settings. The setting value will be
displayed on the remote.
a. Press and hold down the adjusting button (SW3)
b. While holding adjusting button (SW3), momentarily press (tap) the minimum button
(SW1)
c. Record the number that displays on the remote __________
d. Release the adjusting button (SW3)
8. Verify maximum manifold setting. The setting value will be displayed on the remote.
a. Press and hold down the adjusting button (SW3).
b. While holding the adjusting button (SW3) momentarily press (tap) the maximum
button (SW2).
c. Record the number displayed on the remote __________
d. Release the adjusting button (SW3).
9. Disconnect electric power.
10. Remove old PCB.
11. Install new PCB.
12. Program chip adjustment
a. Verify you have the correct program chip for your model, gas type, and altitude. See
attached PCB and Program Chip Matrix.
b. Place Program Chip in connector.
Note: Only plugs in one way.
c. Reconnect electric power to the water heater.
Note: Do not turn on the remote.
d. Find the DIP Switch #1 and #2
located at the top left hand side of the PCB.
e. Change the DIP Switch #1 and #2 setting
to the "ON" position. DO NOT alter any
other DIP Switch.
f. The display on the PCB will be flashing.
At the same time, the display of the remote
control will start to flash.