Rinnai REU-KA2530FFUD-US Service Manual page 46

KB Series Component Replacement Instructions
Heat Exchanger
15.Remove 9 screws to separate the air box from rear of heat exchanger. (FIGURE 9)
Use extreme caution! The following step will expose the burner. The burner is
a downward firing ceramic cassette and is very fragile.
16.Remove 15 screws around the perimeter where heat exchanger joins burner assembly (the screws will have a white
coating, these screws can only be used once, do not use again, the kit will include new screws). (FIGURE 10)
FIGURE 10
Condensing Water Heater Service Manual
CAUTION
Screws (Located through the perimeter 15 total)
FIGURE 9
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RU80i/e, RU98i/e
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