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Chapter 5 Replacement Instructions
Main components Replacement Instructions
6) Remove the Fan assembly in the direction of the
arrow.
15. Loosen water pipe nut connected with Heat
Exchanger.
16. Remove four screws on the top of case.
17. Loosen ten screws to remove Heat Exchanger.
Pull out the Heat Exchanger inside case.
18.Disassemble the screws of the disassembled heat
exchanger and assembled bracket to remove the
bracket. Replace the Heat Exchanger assembly with
the Burner and Exhaust Pipe. Check the o-rings for
damage, if damaged, replace with new o-rings.
O-ring
19. Assemble in the reverse order as the part was
removed.
20. Open the gas shut off valve.
21. Open all water valves.
22. Turn the power on. (Use the manual switch)
23. Turn the unit on and ensure proper operation.
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