Infinity REU-VR3237WG /HD250e REU-VRM3237WC - 35 - Issue 1 - 19/05/09 ©Rinnai
9) 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.
10) 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
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