Required Maintenance; Temperature Controller; Snow Accumulation; Vent System - Rinnai RUC80i Installation And Operation Manual

The appliance must be inspected annually by a licensed professional. Repairs and maintenance shall be performed
by a licensed professional. The licensed professional must verify proper operation after servicing.
WARNING
To protect yourself from harm, before performing maintenance:

Turn off the electrical power supply by unplugging the power cord or by turning off the electricity at the
circuit breaker. (The temperature controller does not control the electrical power.)

Turn off the gas at the manual gas valve, usually located immediately below the water heater.

Turn off the incoming water supply. This can be done at the isolation valve immediately below the water
heater or by turning off the water supply to the building.
WARNING
The following maintenance items are required for the proper operation of your water heater.
The appliance must be inspected annually by a
licensed professional. Repairs and maintenance shall
be performed by a licensed professional. The
licensed professional must verify proper operation
after servicing.
Cleaning
It is imperative that control compartments, burners,
and circulating air passageways of the appliance be
kept clean.
Clean as follows:
1. Turn off and disconnect electrical power. Allow to
cool.
2. Close the water shut off valves. Remove and clean
the water inlet filter.
3. Remove the front panel by removing 4 screws.
4. Use pressurized air to remove dust from the main
burner, heat exchanger, and fan blades. Do not
use a wet cloth or spray cleaners on the burner.
Do not use volatile substances such as benzene
and thinners. They may ignite or fade the paint.
5. Use soft dry cloth to wipe cabinet.

Vent System

The vent system should be inspected at least annually
for blockages or damage. If the vent is blocked
contact a licensed professional.
Motors
Motors are permanently lubricated and do not need
periodic lubrication. However you must keep fan and
motor free of dust and dirt by cleaning annually.

Required Maintenance

Keep the appliance area clear and free from combustible materials, gasoline, and other
flammable vapors and liquids.
KBD Series Manual

Temperature Controller

Use a soft damp cloth to clean the temperature
controller. Do not use solvents.
Lime / Scale Build-up
If you receive diagnostic code "LC#" (LC1, LC2,...),
refer to the procedure, Flushing the Heat Exchanger.
Refer to the section on Water Quality to see if your
water needs to be treated or conditioned. (When
checking maintenance code history, "00" is
substituted for "LC#".)

Snow Accumulation

Keep the area around flue terminal free of snow and
ice. The appliance will not function properly if the
intake air or exhaust is impeded (blocked or partially
blocked) by obstructions.
Coastal Installations
Installations located in or near coastal areas may
require additional maintenance due to corrosive
airborne ocean salt.
Clean the water filter
Clean the inlet water filter by closing the cold and hot
water inlet isolation (shut-off) valves. Put a bucket
under the filter at the bottom of the water heater to
catch any water that is contained inside the unit.
Unscrew the water filter. Rinse the filter to remove
any debris. Install the filter and open the isolation
valves.
61