Rheem 862 27 Series Service Instructions Manual page 69

Burner Cover Plate: (Procedure 5)
1. Isolate power and gas supplies.
2. Remove the front cover. Refer to procedure 1.
3. Open the Over Heat Limiter sheet (OHL) to expose burner plate cover and heat
exchanger.
4. Remove the fourteen screws retaining the burner cover plate.
5. Remove the burner plate cover.
6. Reassemble in reverse order of above. Replace gaskets if required.
7. Position the Overheat Limiter correctly as per step 6 of procedure 23 on page 76.
Gas Manifold Assembly: (Procedure 6)
1. Isolate power and gas supplies.
2. Remove the front cover and burner cover plate. Refer to procedures 1 and 5.
3. Disconnect the connector with two red wires from base of igniter on bottom right hand
side of manifold assembly.
4. Remove igniter from manifold assembly by removing screw on right hand side of igniter.
5. Disconnect white wire from flame sensor at top left hand side of manifold assembly.
6. Remove six screws that retain the manifold assembly to the gas valve and burner
assembly (one at top left hand side and one at top right hand side of manifold and four
at gas valve assembly on bottom right hand side of manifold).
7. Lift the burner manifold up to remove from heater cabinet.
8. 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.
9. Position the Overheat Limiter correctly as per step 6 of procedure 23 on page 76.
10. Test for gas leaks using soapy water solution.
Burner Assembly: (Procedure 7)
1. Isolate power and gas supplies.
2. Remove the front cover, burner cover plate and gas manifold assembly. Refer to
procedures 1, 5, and 6.
3. Remove the rubber gland and white flame rod wire from the left hand side of lower
combustion chamber.
4. Remove the rubber gland and black ignition lead from the right hand side of lower
combustion chamber.
5. Remove the burner assembly by sliding forward out of the lower combustion chamber.
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 using soapy water solution.
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".
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