UGT Series Manual
31
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 applications 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 section on
temperature ranges.
DO NOT repeatedly operate the water heater and
then use a hot water tap while the controller is
turned off. Operating 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
Before operating, 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 settle
on the floor.
Keep the area around the appliance clear and free
from combustible materials, gasoline, and other
flammable vapors and liquids.
Always check the water temperature before
entering a shower or bath.
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.
Should overheating occur or the gas supply fail to
shut off, turn off the manual gas control valve to
the appliance.
Do not adjust the DIP switch unless specifically
instructed to do so.
Do not use an extension cord or an adapter plug
with this appliance.
Any alteration to the appliance or its controls can
be dangerous and will void the warranty.
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. Damage and repair due to corrosive
compounds in the air is not covered by warranty.
Keep the air intake location 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
Temperature
Display
Priority
Indicator
Priority
Button
ON/OFF
Button
In Use
Indicator
Temperature
Selection
MC-91-2US
