Rheem 871018 Service Instructions Manual page 18

Removing a Solar Bypass Valve and Installing a Comparator
1. Ensure power and water to the water heater is isolated.
2. Remove the front cover (refer to component procedure 1 on
page 52).
3. Locate the 2 pin wiring plug in the wiring loom to the cold
sensor mounted on the water body (refer to fig 1) and
disconnect.
4. Plug the 2 pin male and female connectors from the
comparator into the plugs attached to the cold sensor and the
main wiring loom (refer to fig 2). NOTE: If the comparator
connectors do not fit the cold sensor and main wiring loom
plugs, the model is an 871020-B, 871024-C or 871026-B
model which does not require a comparator.
5. Locate the 3 pin wiring plug in the wiring loom to the flow
sensor (refer to fig 3) and disconnect
6. Plug the 3 pin male and female connectors from the
comparator into the plugs attached to the flow sensor and the
main wiring loom (refer to fig 4).
7. Position and secure the comparator in a safe position using
the existing wiring ties securing the wiring loom (refer to fig
5).
8. Refit the front cover.
9. Remove the bypass valve and associated fittings and connect the inlet and outlet pipe
work directly to the gas booster. NOTE: This may require the pipe work to be
extended; unions must be used at the inlet and outlet to enable removal of the gas
booster for serving if required (refer to diagrams on pages 15 & 16).
10. Restore water and power supplies.
2 pin cold sensor wiring
plug disconnected
Cold sensor
Comparator connected
to cold sensor wiring
3 pin flow sensor wiring
plug disconnected
Comparator connected to
flow sensor wiring
Comparator and wiring
secured in place
18
Fig 1
Fig 2
Fig 3
Fig 4
Fig 5