Rinnai Demand Duo R-Series Installation And Operation Manual page 14

f you install this water heater in an area that is known
I
to have hard water or that causes scale build-up, the
water must be treated and may require a more
frequent flushing schedule.
When scale build-up in the heat exchanger begins to
affect the performance of the water heater, a
diagnostic code "LC" will display. Flush the heat
exchanger to prevent damage to it.
This water heater also includes a service indicator
(Service Soon, ). When selected in the parameter
SS
settings, an code will display on the controller
SS
indicating that it is time to flush and service the water
heater. Scale build-up is caused by hard water and can
be accelerated if the water heater is set at a high
temperature.
Rinnai offers Southeastern Filtration's "ScaleCutter
Water Conditioning System" that offers superior lime
scale prevention and corrosion control by feeding a
blend of control compounds into the cold water supply.
Air surrounding the water heater is used for combustion
and must be free of any compounds that cause
corrosion of internal components. These include
corrosive compounds that are found in aerosol sprays,
detergents, bleaches, cleaning solvents, oil based
paints/varnishes, and refrigerants. The air in beauty
shops, dry cleaning stores, photo processing labs, and
storage areas for pool supplies often contains these
compounds.
The water heater should not be installed in any areas
where the air may contain these corrosive compounds.
DO NOT store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
Flammable liquids such as cleaning solvents, aerosols,
paint thinners, adhesives, gasoline and propane must
be handled and stored with extreme care. These
flammable liquids emit flammable vapors and when
exposed to an ignition source can result in a fire hazard
or explosion. Flammable liquids should not be used or
stored in the vicinity of this or any other gas appliance.
The water heater and its water lines must be protected
to prevent freezing. Damage due to freezing is not
covered by the warranty. When connected to a 120-volt
power supply and gas is on, the water heater will not
freeze when the outside air temperature is as cold as
22°F (-30°C) when protected from direct wind exposure.
Because of the "wind-chill" effect, any wind or
circulation of air on the water heater will reduce its
ability to protect itself from freezing.In the event of a
power failure and/or gas interruption at temperatures
below freezing, the water heater should manually be
drained of all water to prevent freezing damage. In
addition, drain the water line and pressure relief valve.
Loss of freeze protection may result in water damage
from a burst heat exchanger or water lines that freeze
and break.
14
Figure 4
0 in.
Back
0 in.
Both
Sides
0 in.
Bottom
Table 4: Clearances to Combustibles and Non-Combustibles
Top
Sides
Back
Front
Intake Filter Exhaust
Connector (IFEC)
Single Wall B-Vent
Demand Duo™ R-Series (REC) Installation and Operation Manual
Location
12 in. (305 mm)
*Clearance for servicing the
anode rods is 54 in. from
the top of the water heater.
**Clearance for servicing is
24 in. (610 mm) in front of
the water heater.
12 in.
[305 mm]
Top
6 in.
[152 mm]
Front
Clearance
0 in.
0 in.
6 in. (152 mm)
6 in. (152 mm)