Instructions / Assembly

2
To meet commercial water use needs, all Immersion thermo-
stat model water heaters are adjustable to deliver water up to
190°F. (88°C) Surface mounted thermostat model waterheaters
are adjustable to deliver 160°F (71°C) for the 50 gallon models
and 180°F (82°C) for the 85 and 120 gallon models. 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 on the thermostat. The
most energy efficient operation will result when the
temperature setting is the lowest that satisfies the needs
consistent with the application.
Maximum water temperatures occur just after the thermostat
has shut off the elements. To find the hot water temperature
being delivered, turn on a hot water faucet and place a ther-
mometer in the hot water stream and read the thermometer.
The following chart details the relationship of water tempera-
ture and time with regard 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
adjusting the thermostat. To comply with safety regulations the
thermostat was set at the factory to a setting corresponding
to 120°F. (49°C)The illustration below pictures the thermostats
used on the water heaters covered in this manual and how to
adjust the water temperature.
There is a Hot Water SCALD Potential if the thermostat is set
too high.
NOTE: When this water heater is supplying general purpose
hot water requirements for use by individuals, a
thermostatically controlled mixing valve for reducing point of
use water temperature is recommended to reduce the risk of
scald injury. Contact a licensed plumber or the local plumbing
authority for further information.
Be sure to read and understand the entire Use & Care Manual before attempting to install or operate this water heater.
Pay particular attention to the following General Safety Precautions. Failure to follow these warnings could result in
serious bodily injury or death. Should you have any problems understanding the instructions in this manual, STOP, and
get help from a qualified installer or service technician or the local utility.
General Safety Precautions
!
DANGER
!
HOT
Water temperature over 125° (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.
BURN
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
DANGER
!
R
E
S
E
T
R
E
S
E
T
TURN OFF
POWER
BEFORE
SERVICING
LOW
MED
HI
To adjust the water temperature on Surface Mounted
Thermostat models, insert a small straight screw-
driver into slotted screw of indicator and move indi-
cator to desired setting.See Operation Section of this
Manual for details.
To adjust the water temperature on Immersion
Thermostat models,turn thermostat dial to align
desired mark with index line above thermostat.
See Operation Section of this Manual for details.
CAUTION!! — Hotter water increases the risk of
SCALDING!
Immersion Thermostat
Surface Mounted
Thermostat
°F
1
9
0
°
1
7
0
°
1
5
0
°
1
4
0
°
1
3
0
°
1
2
0
°
1
1
0
°
V
E
R
Y
H
O
T
W
A
R
M
E-10 Model Only