3
To meet commercial water use needs, the temperature on this water
heater is adjustable up to 185°F (85° C). However, water temperatures
over 125°F (52° C) can cause severe burns instantly or death from
scalds. This is the preferred starting point for setting the control for
supplying general purpose hot water.
Safety and energy conservation are factors to be considered when
setting the water temperature. The most energy efficient operation will
result when the temperature setting is the lowest value that satisfies
the needs consistent with the application.
Maximum water temperatures occur just after burner has shut off. To
find the temperature of the hot water being delivered, turn on a hot
water faucet, and place a thermometer in the hot water stream, and
read the thermometer.
General Safety Precautions
The following chart details the relationship of water temperature and
time to scald injury and may be used as a guide in determining the
safest water temperature for your applications.
The temperature of the water in the heater can be regulated by
setting the temperature on the display (see pages 34 & 37). To
comply with safety regulations the water heater temperature was
set to 120°F (49°C) before the water heater was shipped from the
factory. The illustration information on pages 34 & 37 shows the dis-
play and how to adjust the water temperature.
Hotter water increases the potential for hot water SCALDS.
NOTICE: Mixing valves are recommended for reducing point of
use water temperature by mixing hot and cold water in branch
water lines. It is recommended that a mixing valve complying
with the Standard for Temperature Actuated Mixing Valves for Hot
Water Distribution Systems, ASSE 1017 be installed. See page 6
for more details. For additional information, contact a licensed
plumber or the local plumbing authority.
!
DANGER
HOT
BURN
Water temperature over 125°F (52°C)
can cause severe burns instantly or
death from scalds.
Children, disabled and elderly are at
highest risk of being scalded.
See instruction manual before
setting temperature at water heater.
Feel water before bathing or
showering.
Temperature limiting valves are
available, see manual.
Temperature Time to Produce Serious Burn
120° F (49°C) More than 5 minutes
125° F (52°C) 1
1
/
2
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 1
1
/
2
seconds
155° F (68°C) About 1 second
Table courtesy of Shriners Burn Institute
TIME / TEMPERATURE RELATIONSHIPS IN SCALDS
See Section "User Interface" (pages 33 & 36) for setting the temperature.
Status: Standby
StatusSettings
warm hot very hot
Disable
120°
Service
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