7
OPERATION
CAUTION
DO NOT OPERATE THE HEATER WITHOUT INSTALLING AN
APPROVED TEMPERATURE AND PRESSURE RELIEF VALVE
IN THE OPENING PROVIDED IN THE TANK. GROUND THE
HEATER TO GUARD AGAINST ELECTRIC SHOCK FROM THE
HEATER OR WATER SYSTEM. NEVER OPERATE THE HEATER
WITHOUT FILLING WITH WATER PER THE FILLING
INSTRUCTIONS. FAILURE TO DO SO WILL DAMAGE INTERNAL
PARTS.
FILLING
1. Close the water heater drain valve by turning hand-wheel to
right (clockwise).
2. Open a nearby hot water faucet to permit the air in the system
to escape.
3. Fully open the cold water inlet valve allowing the heater and
piping to be filled.
4. Close the hot water faucet as water starts to flow.
5. Turn on the electrical switch to the water heater.
WARNING
DO NOT ATTEMPT TO OPERATE HEATER WITH COLD WATER
INLET VALVE CLOSED.
TEMPERATURE REGULATION
DANGER
THE WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE
THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT
WATER AT TEMPERATURES DESIRED FOR AUTOMATIC
DISHWASHER AND LAUNDRY USE CAN CAUSE SCALDS
RESULTING IN SERIOUS PERSONAL INJURY AND/OR DEATH.
THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH
THE PERSON’S AGE AND TIME OF EXPOSURE. THE SLOWER
RESPONSE TIME OF CHILDREN , AGED OR DISABLED
PERSONS INCREASES THE HAZARD TO THEM. NEVER ALLOW
SMALL CHILDREN TO USE A HOT WATER TAP, OR TO DRAW
THEIR OWN BATH WATER. NEVER LEAVE A CHILD OR
DISABLED PERSON UNATTENDED IN A BATHTUB OR
SHOWER.
It is recommended that lower water temperatures be used to
avoid the risk of scalding. It is further recommended, in all cases,
that the water temperature thermostats (See Figure 3) be set for
the lowest temperature which satisfies your hot water needs.
This will also provide the most energy efficient operation of the
water heater.
ADJUSTABLE UPPER
THERMOSTAT BEHIND
JUNCTION BOX DOOR
ADJUSTABLE
LOWER (SINGLE)
THERMOSTAT
Figure 3 shows the approximate time-to-burn relationship for
normal adult skin. The thermostats on your water heater have a
linear relationship between degrees of angular rotation and the
corresponding change in temperature. Thus rotating the
temperature adjustment indicator 30 angular degrees will result
in a 10 degree Fahrenheit change in water temperature.
Temperature
Time to Produce 2nd & 3rd
Setting
Degree Burns on Adult Skin
180° F (82° C)
Nearly instantaneous
160° F (71° C)
About 1/2 second
150° F (66° C)
About 1-1/2 seconds
140° F (60° C)
Less than 5 seconds
130° F (54° C)
About 30 seconds
125° F ( 52° C)
About 2 minutes
120° F (49° C)
More than 5 minutes
FIGURE 3
TEMPERATURE ADJUSTMENT
The water temperature is controlled by surface mounted
thermostats with hi-limit. There is one mounted firmly against
the tank directly above each element. The thermostats of A-8
circuit are adjustable from approximately 120°F (49°C) (lowest
setting) to 180°F (82°C) (highest setting). The thermostat of C-2
circuit is adjustable from approximately 110°F (43°C) to 170°F
(77°C) with a factory set point 120°F (49°C). The over temperature
device (hi-limit) attached to each thermostat has a manual reset.
FIGURE 4
NOTE: It is not necessary to adjust the upper thermostat for a
dual element unit. However, if it is adjusted above the factory set
point 140°F (60°C) it is recommended that it not be set higher
than the lower thermostat setting.
To change the temperature setting:
DANGER
1. Turn off the heater electrical supply. Do not attempt to adjust
thermostat with power on.
2. Open the junction box door (for upper thermostat of dual
element water heater only) and/or remove the (lower)
thermostat access panel. Do not remove the plastic personnel
protectors covering the thermostats. The thermostat is factory
pre-set at 140°F (60°C) for dual element units or at 120°F
(49°C) for single element units.
