5
Service Procedure
With the Rinnai Appliances listed on the front page they may look different but the service
procedure is pretty much identical for each one as well as the removal of each part. The
Rinnai service consists of inspection, clean and or replace of parts associated with the
combustion cycle. This procedure consist of the following
Remove the manifold and inspect injectors. If debris is found in the injectors then these
must be cleaned from inside to out. This can be done by removing the face plate.
NOTE: Below is an image of a HDC1500 manifold. The removal of all the other manifolds is a
similar process. The outside edge screws and the screws on the gas valve are to be removed
Remove Combustion Chamber plate to clean and inspect electrodes. This plate is
the one with the site glass on it. The service kit does include a full electrode kit so it
is advised that this is change at least every 2 years if it is deemed suitable for use
once cleaned.
NOTE: Only remove the Electrode cover plate if you have a replacement gasket. If the gasket
deteriorates and there isn't a replacement the water heater has to be isolated until one is
installed
SERVICE
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