Service Manual

Immersion Thermostat Removal
1. STOP, DANGER! Turn power “OFF” to water heater.
2. Open control box door.
3. Turn off cold water supply to heater. Connect hose to drain
spigot of water heater and route to an open drain. Open
a nearby hot water faucet to vent heater for draining. Open
drain spigot of water heater and allow heater to drain
to a point below the Immersion bulb location
(see illustration 10 for location ).
4. Close drain spigot and remove hose.
5. Locate thermostat control inside lower control box
mounted to the right inside surface of the control box.
(see illustration 10).
6. Follow copper capillary tube from thermostat control to
the immersion bulb location and remove immersion bulb
from tank, 11/16" wrench.
7. Remove (pull) thermostat dial from stem of
thermostat control.
8. Remove the two control mounting screws and remove
thermostat control from control panel.
9. Disconnect wire leads to the thermostat control.
NOTE: It may be necessary to identify wires for proper
reconnection to new thermostat.
Immersion Thermostat Replacement
10. Refer to control circuit wire diagram and properly
reconnect wire leads to new thermostat control and
install new control inside control box using screws
from step 8.
11. Replace control dial to stem of thermostat.
12. Loosen ferrule nut of immersion bulb.
(see illustration 11)
SERVICE PROCEDURE ACE-VII
Thermostat Removal and Replacement
Immersion
bulb
Ferrule
nut
Copper
capillary
tube
Tank
nut
13. Position tank nut at end of immersion bulb as shown in illustration 11. Insert immersion bulb into tank and tighten
tank nut.
14. Gently pull copper capillary tube to insure the immersion bulb is in a horizontal position as shown in illustration 11
and tighten ferrule nut.
15. Resume water supply, fill tank and check for leaks.
16. Be sure tank is full or water and resume power supply to water heater. Verify proper thermostat operation.
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DANGER
High voltage exposure. To avoid hazard to
Life or property, be sure power is turned
OFF to water heater while performing this
procedure.
Illustration 10
Illustration 11
Thermostat
Control
Thermostat
Immersion
Bulb
Copper
capillary
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