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Rinnai Tankless Water Heater Installation and Operation Manual 76
6. 6. MaintenanceMaintenance
Topics in this section
• Maintenance
• Cleaning and Inspecting the Air Filter
(Indoor Units Only)
• Flushing the Heat Exchanger
• Draining the Water Heater
6.1 Maintenance
This water heater must be inspected annually by
a trained and qualied professional. Repairs and
maintenance shall be performed by a trained and
qualied professional. The trained and qualied
professional must verify proper operation after
servicing.
To protect yourself from harm, before performing
maintenance:
• Turn o the electrical power supply by un-
plugging the power cord or by turning o
the electricity at the circuit breaker. (The
temperature controller does not control the
electrical power.)
• Turn o the gas at the manual gas control
valve, usually located immediately below
the water heater.
• Turn o the incoming water supply. This
can be done at the isolation valve immedi-
ately below the water heater or by turning
o the water supply to the building.
Keep the appliance area clear and free
from combustible materials, gasoline, and
other ammable vapors and liquids.
The following maintenance items are required for
the proper operation of your water heater.
CLEANING
It is imperative that control compartments, burners,
condensate collection and disposal system, vent
screens and circulating air passageways of the
appliance be kept clean.
BURNER
Check burner ame for proper color. Once ignited,
the ame must cover the surface of the burner.
The ame must burn with a clear, blue, stable
ame. If the ame does not have this appearance,
complete the following steps:
1. Turn o and disconnect electrical power. Allow
to cool.
2. Remove the front panel by removing four
screws.
3. Use a vacuum to remove dust from the main
burner 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.
4. Use soft dry cloth to wipe cabinet.
CONDENSATE COLLECTION AND
DISPOSAL SYSTEM
Periodic inspection and cleaning of the
condensate collection and disposal system.
Ensure condensate is owing and the end of the
drain is open to the atmosphere.
VENT SYSTEM
Periodic cleaning and inspection of the vent
system including screens in the vent termination.
The vent system should be inspected for
blockages including snow or other debris or
damage. If the vent is blocked and cannot be
easily cleared, contact a trained and qualied
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.
WARNING
WARNING
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