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Operating Instructions
Water Heater Capacity and Increasing Temperature
Setpoint:
The water heater temperature setting strongly impacts
the amount of usable hot water available for showers
and baths.
• Safety regulations require a factory setting no greater
than 125°F (52°C) for all new water heaters. Therefore,
if your old water heater was set to a hotter temperature
than your new water heater with a factory set setpoint of
125°F (52°C), the new water heater may seem to provide
lower capacity than your old water heater. This can be
corrected by increasing the temperature setpoint.
• If more hot water capacity is desired, increasing the
temperature from 125°F to 135°F (52°C to 57°C) will
enable the same tank of hot water to last about 25%
longer because less hot water is mixed in at the shower
or faucet.
• Increasing the water temperature setpoint may improve
the cleaning performance of dishwashers and washing
machines.
• The user can adjust the temperature setting to meet
their needs. Always read and understand the safety
instructions contained in the owner's manual before
adjusting the temperature setpoint.
If Adjustment is necessary:
2. Remove the jacket access panel(s) exposing the
thermostat(s). The thermostat protective cover(s)
should not be removed.
3. Using a small screwdriver, set the thermostat(s) dial
pointer(s) to the desired temperature.
4. Replace the jacket access panel(s). Turn on the power
to the water heater
Thermostat
dial pointer
Thermostat
protective
cover
6
Reset
button
150°F
90°F
125°F
TURN OFF
POWER
BEFORE
SERVICING
Mixing Valves
• Mixing valves for reducing point-of-use water
temperature by mixing hot and cold water in branch
water lines are commercially available. Contact a
licensed plumber of the local plumbing authority for
further information.
Extended Shutdown Periods
If the water heater is to remain idle for an extended
period of time, the power and water to the appliance
should be turned off and the water heater drained to
conserve energy and prevent a buildup of dangerous
hydrogen gas. This unit has no power button, power
can only be shut off at the circuit breaker or disconnect
switch.
The water heater and piping should be drained if they
might be subjected to freezing temperatures.
After a long shutdown period, the water heater's
operation and controls should be checked by qualified
service personnel. Make certain the water heater is
completely filled again before placing it in operation.
NOTE: Refer to the Hydrogen Gas Caution in the
Operating Instructions (see page 3).
49-6000247 Rev. 1
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