State GPH-90N - Manual (Page 35)

Service Instructions
0610 35 319172-000 Rev. 00
GAS WATER HEATERS
HOSE (HEAT ENGINE TO STORAGE TANK) 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.
Remove panels to gain access:
Remove Door
Disconnect the electrical power 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).
Carefully disconnect all the wiring harness plugs from
the Display Panel.
Carefully remove the door hinge pins from their retaining
fi ngers.
Remove the top casing (front)
Use a screwdriver to remove the six screws securing
the top casing.
Lift up and remove casing top (front).
Remove the left side panel
Use a screwdriver to remove the screw from the bottom,
front of the left side panel.
Remove the three screws from the left side panel towards
the rear of the unit.
Remove the screw from the top of the unit.
Push the panel back and lift out.
1.
2.
3.
4.
5.
6.
1.
2.
1.
2.
3.
4.
To Remove:
Close the shutoff valves on both the hot-water and cold-
water lines.
Drain the tank following the instructions in the “Draining
The Tank” section in the Operating Manual.
Unscrew the fi tting at both ends of the hose assembly(s).
The upper hose is the (hot) water outlet from the heat
engine. The lower hose is the (cold) water inlet to the
heat engine.
Remove the hose assembly(s).
To Install:
Install the new hose assembly(s).
Tighten the fitting at both ends of the hose
assembly(s).
Close the drain valve.
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.
Check for leaks and repair as required.
Reassemble the side panel in the reverse order.
Reassemble the door in the reverse order.
Carefully reconnect the wiring harness plugs to the
Display Panel.
Reassemble the top casing in the reverse order.
Reconnect the electrical power to the water heater.
Restart the water heater following the “Lighting
Instructions” found in the Operating Manual.
1.
2.
3.
4.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.