State GPH-90N - Manual (Page 5)

Service Instructions
0610 5 319172-000 Rev. 00
GAS WATER HEATERS
CIRCULATION PUMP REPLACEMENT
This instruction has been prepared to acquaint you with the service of your gas-fi red water heater. It is your responsibility to
ensure that your water heater is properly installed and maintained.
Failure to follow the instructions in this service instruction sheet may result in serious bodily injury and/or property
damage. Thoroughly read and understand all instructions before you attempt to install, operate or service this heater.
Maintenance and service requires trade knowledge in the areas of plumbing, electricity and gas. If you lack these skills or
have diffi culty understanding these instructions you should not proceed. Enlist the help of a qualifi ed service technician to
service this water heater.
To Remove:
Disconnect the electrical power to the water heater.
Close the shutoff valves on both the hot-water and cold-
water lines.
Close the shutoff valve on the gas supply line to the
water heater.
Unlock the door by rotating the lock counter-clockwise
with a wide, slot screwdriver.
Release the top and bottom door pins by prying the pins
out, using a small screwdriver.
Open the door (the door remains fastened to the left
side panel).
Remove the ten screws that secure the front cover of
the heat engine. Remove the front cover of the Heat
Engine.
Remove the two screws securing the circuit board and
partially extract it.
Carefully disconnect the Circulating Pump wiring harness
plug from the circuit board.
Drain the tank following the instructions in the “Draining
The Tank” section in the Operating Manual.
Disconnect the lower hose from the Water Inlet fi tting on
the left hand side of the Heat Engine Cabinet.
Remove the two mounting screws for Water Inlet (suction
side) of the pump.
Remove the two screws on the discharge side (copper
piping) of the pump.
Remove the remaining four Circulating Pump mounting
screws; two located at the bottom of the Heat Engine
Cabinet, and two located at the Water Inlet.
Remove the pump.
To Install:
Assemble the new pump to the Heat Engine Cabinet
using the four screws.
Reassemble the copper piping to the pump (discharge
side).
Reassemble the Water Inlet fi tting to the Heat Engine
Cabinet.
Reconnect the lower hose to the Water Inlet fi tting.
Open the shutoff valves on both the hot-water and cold-
water lines.
Fill the tank following the instructions in the “Filling The
Water Heater” section in the Operating Manual.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
1.
2.
3.
4.
5.
6.
Secure the Ground Lug with the screw.
Carefully reconnect the wiring harness plug to the circuit
board.
Slide the circuit board into its proper position and secure
using the two screws.
Reassemble the front cover of the Heat Engine.
Close and lock the door.
Open the shutoff valve on the gas supply line to the
water heater.
Reconnect the electrical power to the water heater.
Restart the water heater following the “Lighting
Instructions” found in the Operating Manual. 7.
8.
9.
10.
11.
12.
13.
14.
Access To
Door Pins
Door
Lock