KBD Series Manual
How to use the Temperature Controller
The MC-91-2 controller is the standard temperature controller
that is supplied with the water heater. On indoor models it is
integrated into the front panel. The MCC-91-2 controller is for
commercial and hydronic applicaons requiring higher
temperatures. When the MCC-91-2 controller is connected,
these higher temperatures are available on all controller
models in the system. Refer to the secon on temperature
ranges.
DO NOT repeatedly operate the water heater and then use a
hot water tap while the controller is turned off. Operang the
water heater in this way to alternately produce hot water may
cause water to condense on the outside of internal parts and
accumulate in the water heater cabinet.
Dimensions (inches): 3.5 W x 4.75 H x 0.75 D
Temperature
Display
Priority
Indicator
Priority
Button
ON/OFF
Button
In Use
Indicator
Temperature
Selection
MC-91-2US
x Before operang, smell all around the appliance area for
gas. Be sure to smell next to the floor because some gas
is heavier than air and will sele on the floor.
x Keep the area around the appliance clear and free from
combusble materials, gasoline, and other flammable
vapors and liquids.
x Always check the water temperature before entering a
shower or bath.
x Do not use this appliance if any part has been under
water. Immediately call a licensed professional to
inspect the appliance and to replace any part of the
control system and any gas control which has been
under water.
x Should overheang occur or the gas supply fail to shut
off, turn off the manual gas control valve to the
appliance.
x Do not adjust the DIP switch unless specifically
instructed to do so.
x Do not use an extension cord or an adapter plug with
this appliance.
x Any alteraon to the appliance or its controls can be
dangerous and will void the warranty.
x If you install this water heater in an area that is known
to have hard water or that causes scale build-up the
water must be treated and/or the heat exchanger
flushed regularly. Rinnai provides a “Scale Control
System” that offers superior lime scale prevenon and
corrosion control by feeding a blend of control
compounds into the water supply. Damage and repair
due to corrosive compounds in the air is not covered by
warranty.
x Keep the air intake locaon free of chemicals, such as
chlorine or bleach, that produce fumes. These fumes
can damage components and reduce the life of your
appliance. Damage and repair due to scale in the heat
exchanger is not covered by warranty.
WARNING
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