Rinnai RH180 Specifications download pdf (Page 32)

Maintenance – Engine Heat Exchanger

32

• Flushing the heat exchanger consists of

pumping virgin food grade white

vinegar or food grade citric acid through

the copper heat exchanger to remove

lime scale or calcium buildup.

• Damage caused by lime or scale

buildup is not covered under the water

heater’s warranty.

• Specific flushing instructions can be

found in the System Maintenance

section of the operation and installation

manual.

5 gallon bucket to be filled

with 4 gallons of food grade

white vinegar or citric acid.

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