OPERATING THE TEMPERATURE CONTROL SYSTEM
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 be set for the lowest
temperature which satisfi es your hot-water needs. This
will also provide the most energy effi cient operation of
the water heater.
Short repeated heating cycles caused by small hot-water
uses can cause a temperature increase of the hot water by
11C° (20F°) higher than the heater's temperature settings.
If you experience this type of use you should consider
using lower temperature settings to reduce scald hazards.
Should overheating occur or the gas supply fails to shut
off, turn off the main manual gas shut off valve to the
appliance (see Figure 1).
DANGER
HOT
HOT
BURN
HOT WATER CAN SCALD:
Water heaters are intended to produce hot water.
Water heated to a temperature which will satisfy space
heating, clothes washing, dish washing, cleaning and
other sanitizing needs can scald and permanently injure
you upon contact. Some people are more likely to be
permanently injured by hot water than others. These
include the elderly, children, the infi rm, or physically/
mentally handicapped. If anyone using hot water fi ts into
one of these groups you must take special precautions.
The National Plumbing Code requires certain fi xtures to not
exceed 49°C (120°F). In addition to using lowest possible
temperature setting that satisfi es your hot water needs, a
means such as a mixing valve, should be used at hot-water
taps used by these people or at the water heater (see
Figure 7 & Figure 8). Follow manufacturer's instructions
for installation of the valves. Before changing the factory
setting on the thermostat, in this manual, see Table 4.
36
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Water temperature over
125°F (52°C) can cause
severe burns instantly
resulting in severe injury or
death.
Children, the elderly and the
disabled and are at highest
risk of scald injury.
Feel water before bathing or
showering.
Temperature limiting devices
such as mixing must be
installed when required by
codes and to ensure safe
temperatures at fixtures.
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The water heater should be located in an area where
the general public does not have access. If a suitable
area is not available, a cover should be installed over the
thermostat to prevent tampering.
This water heater is equipped with an adjustable
thermostat to control water temperature (see Figure 39).
Hot water temperatures required for automatic dishwasher
and laundry use can cause scald burns resulting in serious
personal injury and/or death. The temperature at which
injury occurs varies with the person's age and time of the
exposure. The slower response time of children, aged or
disabled persons increases the hazards 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.
The hot setting shown on the dial is approximately 49°C
(120°F). This is a good starting point to set the temperature.
Setting the water heater temperature at 49°C (120°F) will
reduce the risk of scalds. Some states require settings at
specifi c lower temperatures.
The thermostat settings on the gas control valve are shown
in Figure 39.
The water temperature setting was factory set at the lowest
(VAC) temperature setting.
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