Rinnai Circ-Logic RU80e, Service Manual

Page: 33 / 60

Condensing Water Heater Service Manual 33
100000354
KA Series Component Replacement Instructions
RC80HPe
Heat Exchanger
30. Install heat exchanger assembly in case. Place
bottom in cabinet first. Attach with five screws. (two
at top back and three on bottom). Attach
reinforcement bracket with two screws.
Install water and drain lines
31. Install drain connecting pipe with new o
-
rings and
attach with new clips.
32. Attach connecting pipe to by
-
pass valve with one
screw and bracket. Attach other water line with one
screw and bracket.
33. Attach the hot water outlet line to the hot water
outlet fitting with one screw and bracket. Reconnect
condensate tube to upper heat exchanger.
Reconnect wire harness
34. Reconnect heat exchanger thermistor (upper right).
35. Reconnect anti frost connector at bottom of cabinet.
One blue connector.
36. Reconnect thermal fuse harnesses (lower right).
Two single white wire connectors.
Install burner and burner cover plate
37. Install burner assembly with two screws. Remove
combustion chamber packing on sight glass plate.
Install new packing, in kit, on sight glass plate.
Install combustion chamber sight glass plate with
eight screws.
Install fan
38. Reinstall fan with two screws. Install fan connector.
Install gas manifold
39. Remove packing from gas control assembly.
Discard. Install new packing, in kit, on gas control
assembly.
40. Remove the packing for manifold. Install new
packing, in kit, on gas manifold.
41. Reconnect the two solenoid wire harnesses at
bottom of manifold.
42. Reconnect ignitor module harness, mounted on
manifold. (gray/gray)
43. Attach the gas manifold with three machine screws
at the gas control assembly. Install six screws on
gas manifold to heat exchanger. Attach wire
harness ties.
Reconnect flame rod connectors and electrode
44. Install two flame rod connectors. (marked )
45. Attach ignitor high tension cord to the electrode.
46. Turn on water supply, power supply, and gas
supply. Check for gas and water leaks. Perform
operational checks.
47. Install the front panel using four screws.