TM 10-4510-206-14
5-7.
REPAIR PROCEDURES (CONT'D)
n.
Operating Limit and High Limit Controls.
The operating limit and high
limit controls are identical except that the operating limit control
has a control knob and a dial calibrated from O to 250°F (121°C). The
high limit control has a plain cover and protected (covered) screwdriver
adjustment that is set at the factory.
Because the two controls are
mounted differently, the removal and installation procedures are not
the same.
Repair each control by replacement of the complete control.
Replace the controls as follows:
WARNING
Electrical power furnished to the water heater can
be hazardous to life.
Do not work with live cir-
cuits.
Make certain ac power is removed from the
water heater before performing the following pro-
cedures.
Ensure water heater is cold before servicing the
high limit temperature control.
The water vessel
becomes hot during operation and burns or bodily
injury may result from contact with the water
heater before it cools.
5-65
