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Short repeated heating cycles caused by small hot water
uses can cause the temperature to exceed the thermostat
setting by up to 30°F (16.7°C). If you experience this
type of use you should consider using lower temperature
settings to reduce scald hazards.
Any water heater's intended purpose is to heat water.
Hot water is needed for cleansing, cleaning, and
sanitizing (bodies, dishes, clothing). Untempered hot
water can present a scald hazard. Depending on the
time element, and the people involved (adults, children,
elderly, infirm, etc.) scalding may occur at different
temperatures.
HOTTER 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. See
(page 13).
Table 3
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 in your home fits into one of these groups
or if there is a local code or state law requiring a 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
the piping diagram on page 41. Follow manufacturer's
instructions for installation of the valves. Before changing
the factory setting on the thermostat, read this section
and see
.
Figure 22
WATER TEMPERATURE ADJUSTMENT
The water temperature setting can be adjusted from 55°F
to 181°F. Turn the Gas Control/Temperature Knob to the
desired setting/temperature.
TEMPERATURE REGULATION
(page 13) and
Figure 11
NOTE:
The temperatures indicated are approximates. The actual
temperature of the heated water may vary.
STANDARD MODE
The controller adjusts the water heater to maintain the
temperature set by the user.
VACATION SETTING
The Vacation setting (VAC) sets the controller at
approximately 55°F. This setting is recommended when
the water heater is not in use for a long period of time.
This effectively turns the controller temperature setting
down to a temperature that prevents the water in the
water heater from freezing while still conserving energy.
STATUS LIGHT CODE
Normal Flashes:
• 0 Flashes Indicates Control Off/Pilot Out.
• 1 Flash Indicates Normal Operation.
• A solid red light indicates that the gas control
valve/thermostat is shutting down.
See
(page 36) for detailed diagnostic
Table 7
information.
Never allow small children to use a hot water tap, or
to draw their own bath water. Never leave a child or
handicapped person unattended in a bathtub or shower.
NOTE: A water temperature range of 120°F-140°F
(49°C-60°C) is recommended by most dishwasher
manufacturers.
The thermostat is adjusted to the pilot position when it
is shipped from the factory. Water temperature can be
regulated by moving the temperature dial to the preferred
setting. The preferred starting point is 120°F at the "HOT"
setting. Align the knob with the desired water temperature
as shown in
. There is a hot water scald
Figure 22
potential if the thermostat is set too high.
If overheating occurs or the gas supply fails to shut off,
turn off the manual gas control valve to the water heater.
GAS CONTROL VALVE/THERMOSTAT
SETTINGS
GAS CONTROL/TEMPERATURE KNOB
VAC
IGNITER
FIGURE 22. GAS CONTROL/TEMPERATURE KNOB
24
120°F
MARK
STATUS
LIGHT
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