Bradford-White Corp SERVICE PROCEDURE MCE-XII Thermostat Removal and Replacement, Page 27, Life or property, be sure power is turned OFF to water heater while performing this

Immersion Thermostat Removal & Replacement
1. STOP, DANGER! Turn power “OFF” to water heater.
2. Turnoff cold water supply to heater. Connect hose to drain
spigot of water heater and route to anopen drain. Open
a nearby hotwater faucet to vent heater for draining. Open
drain spigot of water heater and allowheater to drain
to a point below theImmersion bulb location
(see illustration 16 ).
3. Close drain spigot and removehose.
4. Remove lower control box cover and insulation.
5. Locate thermostat inside lower control box mounted to
the right side of the box, below the ECO control
(see illustration 16).
6. Follow copper capillary tube from thermostat to the
immersion bulb location and remove immersion bulb
from tank, 11/16 wrench.
7. Remove (pull) thermostat control dial from stem of
thermostat.
8. Remove the two thermostat mounting screw screws
located under thermostat dial (see illustration 16).
9. Once thermostat is removed, disconnect
wire leads to the thermostat. NOTE: It may be
necessary to identify wires for proper reconnection to
new thermostat.
10. Refer to wiring diagram located o n the inside of the
upper control box cover and proper ly reconnect wire
leads to new thermostat and remount 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 17)
SERVICE PROCEDURE MCE-XII
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 17. Insert immersion bulb into tank and tighten
tank nut.
14. Gently pull copper capillary tube to insure the immersion bulb is in a horizontal po sition as shown in illustration 17
and tighten ferrule nut.
15. Resume water supply, fill tank and check for leaks.
16. Be sure tank is full or wat er and resume power supply to water heater. Verify proper thermostat operation.
Page 27
DANGER
High voltage exposure. To avoid hazard to
Life or property, be sure power is turned
OFF to water heater while performing this
procedure.
Immersion
Thermostat Bulb
Location
Copper Capillary
Tube
Immersion
Thermostat
control
Thermostat contro l
Mounting Screws
Located Under
Thermostat Dial
ECO
Control
Illustration 16
Illustration 17
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