100221773_2000189439_Rev. 01
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39
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 satisfies your hot-water needs.
This will also provide the most energy efficient 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 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).
Water temperature over
125°F 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 valves must
be installed when required
by codes and to ensure safe
temperatures at fixtures.
BURN
HOT
HOT
DANGER
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, 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
infirm or physically/mentally handicapped. If anyone using
hot water from this heater fits into one of these groups
or if there is a local code or state law requiring certain
temperature water at the hot-water tap, then you must
take special precautions. In addition to using the lowest
possible temperature setting that satisfies your hot-water
needs, a means such as a mixing valve, should be used
at the hot-water taps used by these people or at the water
heater. Mixing valves are available at plumbing supply
or hardware stores (see Figure 8 & Figure 9). Follow
manufacturer’s instructions for installation of the valves.
Before changing the factory setting on the thermostat, in
this manual, see Table 5.
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 47 & Figure 46).
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 120°F .
This is a good starting point to set the temperature.
Setting the water heater temperature at 120°F will reduce
the risk of scalds. Some states require settings at specific
lower temperatures.
The thermostat settings on the gas control valve are shown
in Figure 47 & Figure 46.
The water temperature setting was factory set at the lowest
(VAC) temperature setting.
