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SERVICE PROCEDURE MCE-XIV
6
00V Model High Limit (ECO) Control
Removal and Replacement
Page 29
600V Surface Thermostat Model
High Limit (ECO) Control
Removal and Replacement
1. STOP, DANGER! Turn power “OFF” to water heater.
2. Remove lower control box cover and insulation.
3. Locate high limit switch mounted to the tank above the
element spuds (see illustration 20).
4. Disconnect wire leads to the high limit. NOTE: It may be
necessary to identify wires for proper reconnection to
new control.
5. Remove the two high limit mounting nuts holding the
sensor to the tank. Take care not to damage the
mounting studs.
6. Fasten the replacement high limit to the tank using the
nuts from step 5. Take care not to damage the mounting
studs. Refer to wiring diagram located on the inside of
the upper control box cover and properly reconnect wire
leads to new high limit.
7. Verify proper ECO operation.
DANGER
High voltage exposure. To avoid hazard to
Life or property, be sure power is turned
OFF to water heater while performing this
procedure.
Mounting Stud
High Limit Switch
Illustration 20
29