Rheem 862 27 Series Service Instructions Manual page 71

Ignition Electrode: (Procedure 11)
1. Isolate power and gas supplies.
2. Remove the front cover, burner cover plate, gas manifold assembly and burner
assembly. Refer to procedures 1, 5, 6 and 7.
3. Remove the burner assembly by sliding forward out of the lower combustion chamber.
4. Remove the protective silicon tube from the ignition electrode mounted on right hand
side of burner assembly.
5. Remove retaining screw from ignition electrode holder and remove electrode.
6. Reassemble in reverse order of above. NOTE: Ensure wiring to igniter and flame sensor
is not pinched during reassembly. Ensure the three gaskets on gas valve assembly are
intact and correctly fitted.
7. Position the Overheat Limiter correctly as per step 6 of procedure 23 on page 76.
8. Test for gas leaks with soapy water solution.
Water Bypass Control Assembly: (Procedure 12)
Do not attempt to dismantle the servomotor, this is factory calibrated.
Adjustments will render the water heater either inoperable or cause incorrect
water temperature delivery.
1. Isolate power and water supplies.
2. Unscrew the water drain plug and pressure relief valve and drain the water heater.
3. Remove the front panel. Refer to procedure 1.
4. Remove the two retaining flanges on the copper pipes located on the outlet of the water
bypass control assembly by removing four screws.
5. Carefully disengage the two copper pipes from the water bypass control assembly.
6. Remove the stainless steel spring clip that connects the water bypass control assembly
to the water volume control assembly. Disengage these two components by gently
pulling them apart.
7. Remove the black protective cover from the top of the water bypass control assembly to
expose the multi-pin connector. Disconnect multi-pin connector from the bypass control.
8. Remove water bypass control assembly from heater cabinet.
9. Reassemble in reverse order of above. Ensure an o'ring is fitted to each of the three
connections on the water bypass control assembly.
TM049 27L Continuous Flow Service Instructions
REV AL – Issued April 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed "uncontrolled".
71