Rinnai INFINITY REU-3203W, Service Manual

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Infinity REU-3203W - 47 - ©Rinnai
10) Removal of the Heat Exchanger
a. Remove front panel (4 screws). (Refer Item 1.)
b. Remove the PCB. (Refer Item 2.b.)
c. Remove heat exchanger water supply pipe and
bypass pipe. Refer to 3).
d. Remove one (1) HEX HW pipe screw and pull the
hot water pipe forward. Handle O-ring carefully..
e. Remove the two (2) screws fixing the manifold
and gas control.
f. Remove four (4) heat exchanger unit screws.
g. Remove connectors of the fan motor, thermal
fuse, flame rod etc.
h. Pull the heat exchanger unit forward and out.
11) Removal of the Thermal Fuse and OHS
a. Remove front panel (4 screws).
b. Take out the heat exchanger unit. Refer to 10).
c. Remove the thermal fuse.
Note: After replacing, install the thermal fuse as in the
following diagrams.
Heat Exchanger RHS
Heat Exchanger Front