Maintenance; Cleaning; Air Intake And Exhaust; Motors - Rinnai RL75E Operation And Installation Manual

Maintenance

WARNING
Turn off the electrical power supply, the manual gas
valve and the manual water control valve whenever
servicing the unit.
Repairs and maintenance should be performed by a
qualified service technician. The appliance should be
inspected annually by a qualified service technician.
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. 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.

Air Intake and Exhaust

The air intake and exhaust should be inspected at
least annually for blockages or damage.

Motors

Motors are permanently lubricated and do not need
periodic lubrication. Keep fan and motor free of dust
and dirt by cleaning annually.

Temperature Controller

Use a soft damp cloth to clean the temperature
controller. Do not use solvents.

Lime / Scale Build-up

If you receive Error Code "LC", 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.

Visual Inspection of Flame

The burner must flame evenly over the entire surface
when operating correctly. The flame must burn with a
clear, blue, stable flame. See the parts breakdown of
the burner for the location of the view ports.
The flame pattern should be as shown in the figures
below.
VB Series Outdoor LS Manual 11