Rinnai RU98i - Check Valve Maintenance

Rinnai CVent 32
Common Header Check Valve Maintenance
Visually inspect the check valve annually (or aer 4000 operaon hours) for obstrucons, proper operaon ,
large and small parcles of debris, according to the instrucons below. Operaon hours can be obtained on the
controller by pressing and holding the down buon for 2 seconds and without releasing the down buon, press
the ON/OFF buon. The third number to cycle through will be the operang hours in units of a hundred hours.
For example, “40” means 4000 hours.
1. Shut the electrical power o, for the appliances before inspecng the common header, otherwise ue gasses
can emerge uncontrolled into the appliance room.
2. Over the check valves an elbow is installed with an inspecon lid, the lid must be twisted o for inspecon
and maintenance of the check valve.
3. Restore the electric power for the inspected appliance and manually re the appliance and check if the check
valve opens fully and is free of obstrucons.
4. In case debris is noced , for the cleaning of the check valve of large parcles (over 1 mm) we advise to use a
vacuum cleaner for removal of the large parcles. The vacuum cleaner should be used at either low power,
and/or with an adapter small enough to clean the check valve out. For smaller parcles (under 1mm) we
advise to use a sucient amount of luke-warm water to ush the adapter. Do not use detergents or solvents
for cleaning the check valve!! When applicable the small check valve can be removed and re-installed for
inspecon by pulling it out of posion. We do not advise to do this frequently. When re-installed, the check
valve must be inspected again for proper operaon by operang the appliance.
Note: When an in-line condensate trap is installed (oponal component) this must be removed and a hose
should be connected for the correct disposal of the ushing water. Protect the building structure for the
water emerging from this hose and dispose the water with debris in a way acceptable to the local codes. Be
aware that condensate is a corrosive substance that could aect metals, brick etc.
5. Re-assemble the components aer the cleaning procedure in reverse order. Check the correct installaon of
the rubber seals. Power the appliances again and let them run for 30 minutes minimum. While running, check
the common header system visually for condensate leaks caused by the inspecon. In case leaks are sighted
these must be solved before the installaon is released. When seal rings are damaged by the inspecon these
must be replaced, they cannot be repaired by using a silicon sealant or other.
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Note: Rinnai recommends replacing the check valve when replacing the water heater.