Laars LUHE120T, Installation & Operation Manual With Troubleshooting Manual

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45
Temperature Adjustment
Table 6
– Approximate Time/Temperature Scald Chart
APPROXIMATE TIME/TEMPERATURE RELATIONSHIPS IN SCALDS
120°F (49°C) More than 5 minutes
125°F (52°C) 1½ to 2 minutes
130°F (54°C) About 30 seconds
135°F (57°C) About 10 seconds
140°F (60°C) Less than 5 seconds
145°F ( 63°C ) Less than 3 seconds
150°F (66°C) About 1½ seconds
155°F (68°C) About 1 second
DANGER
Hotter water increases the risk of scald injury. Scalding may occur within 5 seconds at a temperature
setting of 140°F
(60°C). To protect against hot water injury, install an ASSE approved mixing valve in
the water system. This valve will reduce point of discharge temperature by mixing cold and hot water in
branch water lines. A licensed plumbing professional or local plumbing authority should be consulted.
CAUTION
This water heater, when set at a lower temperature setting, is NOT capable of producing hot water of
sufficient temperature for sanitizing purposes.
This water heater is equipped with an energy cut out device to prevent overheating. Should overheating
occur or the gas supply fails to shut off, turn OFF the control panel power switch to the appliance and call a
qualified service agency.
NOTICE
The lower the temperature setting, the greater the energy efficiency, both to heat the water and to maintain
the storage temperature during standby periods. Lower water temperatures also extend tank life.
Remember, no water heating system will provide exact temperatures at all times. Allow a few days of
operation at this setting to determine the correct temperature setting consistent with the requirements for the
installation.
The water heater temperature setting is adjusted by using the control display mounted to the water heater. The
water heater thermostat is set at the lowest setpoint of 100

F (38

C) when shipped from the factory. The
control display shows the temperature setpoint in degrees Fahrenheit (

F) or degrees Celsius (

C), and the
status of the water heater (“Idle” or “Heating”). If the water heater is functioning normally, the display will also
show “Operational.”
For energy efficient operation of your water heater, the suggested initial temperature setting is 120

F (49

C) .
During the winter season, or any cold period, you may desire a higher temperature setting to adjust for the
colder incoming water. This adjustment, however, may cause additional condensation to form on the cooler
tank surface. This does
NOT mean the tank is leaking. During summer months, the warmer incoming water
temperatures will benefit the performance of your water heater and reduce the amount of condensation
developed.
Condensation does NOT mean your tank is leaking. Most reported tank leaks at installation are proven to be
condensation. To avoid unnecessary inconvenience and expense, make sure the tank is leaking, and that it is
not condensation, before calling an independent servicing contractor or qualified service professional.
If the water heater is to remain idle for 30 days or more or is subjected to freezing temperatures while shut off,
the water heater and piping should be fully drained, and the drain valve should be left fully open. Refer to the
“Draining the Water Heater” in this Installation and Operation Manual (page 52) for this procedure.