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8
TEMPERATURE REGULATION
HOT WATER
OUTLET
TO TANK
INLET
CHECK
VALVE
MIXING
VALVE
COLD
WATER
INLET
TEMPERED WATER
OUTLET
12” TO 15”
(30-38 cm)
CHECK
VALVE
FIGURE 1.
TEMPERATURE ADJUSTMENT
The water heaters covered in this instruction manual are equipped
with an electronic control system. The control system senses
temperature from a factory installed immersion temperature
probe. The “Operating Set Point” is adjusted to control water
temperature. This is an adjustable user setting in the control
system’s “Temperatures Menu.” This and all control system
menus are accessed through the UIM (User Interface Module
located on the front panel of the water heater.
The Operating Set Point is adjustable from 90°F/42°C to
190°F/88°C. The factory setting is 120°F/49°C. See the Control
System Operation section of this manual for instructions on how
to adjust the Operating Set Point and other user settings.
Set the Operating Set Point at the lowest setting which produces
an acceptable hot water supply. This will always give the most
energy efficient operation.