Rinnai FUA-E, Service Manual

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48
Servicing Infinity Water Heaters
Isolate electrics and valve off hot, cold, and gas to unit.
Check the water filter and strainer to be sure there are no blockages.
Remove the combustion fan and clean the impeller.
Check the burner for wear or water damage. Vacuum out any debris. Wipe out
chamber.
Check the heat exchanger for soot or hot spots that could be caused by poor
combustion.
Clean carbon build up from ionisation and ignition probes.
Check flue terminal for blockages or potential blockages, check that flue is in good
condition.
Check all electrical connections are reconnected
The gas pressures should then be re-set. The procedure is detailed in the manual.
Verify temperature control by checking temperature at outlet, bear in mind that there
will be pipework losses.
Check all gas joints inside the unit with an electronic gas detection device when
starting unit.
Leak check all joints back to the service valve (commercial installations) or tightness
test the installation for domestic installations.
Servicing Procedure