Rinnai HE Series How To Use Manual page 153

Troubleshooting Manual
WARNING
There are a number of live tests that are required when fault finding this product. Extreme care should be used
at all times to avoid contact with energized components inside the furnace.
You MUST be a qualified service person before proceeding with these test instructions.
Before checking resistance readings, turn off power source to unit and then isolate each item to be checked
from the circuit by unplugging it.
When setting gas pressures on one of these units, please check the complete model number you are trouble‐
shooting. Gas pressures and dip switches can vary among models. Always check the rating plate for complete
CAUTION
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Rinnai Tankless
Water Heater
If any of the original wire as supplied with the appliance must
be replaced, it must be replaced with type 18 AWG wire or its
equivalent.
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