Rinnai RSC199i Installation And Operation Manual page 82

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.
TEMPERATURE CONTROLLER
Use a soft damp cloth to clean the temperature
controller. Do not use solvents.
LIME/SCALE BUILD-UP
Scale build-up is caused by hard water and can
be accelerated if the water heater is set at a high
temperature. Refer to section "6.3 Flushing the
Heat Exchanger" for more information. Refer to
section "Water Quality Guidelines" to determine
if your water needs to be treated or conditioned.
The water must be potable, free of corrosive
chemicals, sand, dirt, or other contaminates. It
is up to the installer to ensure the water does
not contain corrosive chemicals, or elements
that can affect or damage the heat exchanger.
Water that contains chemicals exceeding the
levels required affect and damage the heat
exchanger. Replacement of the heat exchanger
due to water quality damage is not covered by
the warranty.
SNOW ACCUMULATION
• Keep the area around flue terminal free
of snow and ice. The water heater will not
function properly if the combustion air or
exhaust vent pipes are impeded (blocked or
partially blocked) by obstructions.
• Keep the condensate drain line free of snow
and ice. Ensure the line is not blocked or
clogged and that condensate is flowing freely.
COASTAL INSTALLATIONS
Installations located in or near coastal areas may
require additional maintenance due to corrosive
airborne ocean salt. If corrosion is observed on the
body of the water heater, the water heater shall
be inspected to ensure proper operation and if
necessary, repaired or replaced.
FILTERS
• Water Filter — Clean the inlet water filter by
closing the cold and hot water inlet isolation
(shut-off)t valves. Put a bucket under the filter
at the bottom of the water heater to catch
82
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.
• Air Filter — See section "6.2 Cleaning and
Inspecting the Air Filter" for more information.
PRESSURE RELIEF VALVE
Operate the pressure relief valve manually once
a year. In doing so, it will be necessary to take
precautions with regard to the discharge of
potentially scalding hot water under pressure.
Ensure discharge has a safe place to flow.
Contact with your body or other property may
cause damage or harm.
WARNING
Testing the pressure relief valve should only
be performed by a trained and qualified
professional. Water discharged from the
pressure relief valve could cause severe burns
instantly or death from scalds.
VISUAL INSPECTION OF FLAME
Verify proper operation after servicing. 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
images below:
Flame Rod
Figure 91
Rinnai Tankless Water Heater Installation and Operation Manual
SATISFACTORY
FRONT VIEW
Blue Flame