Rheem AP15121-1 - Manual (Page 18)

18
Cavity Insert Instructions
The following instructions are intended for qualified
service personnel ONLY, and should only be done
when necessary.
In order to replace the ECO,thermistor or heating element,
remove the cavity insert crossbar by following the
instructions below:
Turn off the power to the water heater.
Remove the jacket access panel(s) and insulation.
See page 20.
Rotate the crossbar up and down until it breaks
away from the remainder of the cavity insert.
(See illustration to the left)
Discard the crossbar. It cannot and need not be
replaced.
Replace the ECO,thermistor and/or element as
necessary.
Replace the insulation and jacket access panel(s)
before turning on the power to the water heater.
NOTICE: The cavity insert crossbar is necessary
for the manufacturing process only. The removal
of the crossbar will not interfere with the operation
of the water heater.