Temperature Regulation; Risk Of Scald Warnings - Lochinvar Commercial Electric Water Heaters Installation And Service Manual

WARNING:
HAZARD OF ELECTRICAL SHOCK - Before
opening the electrical access panel to adjust the
thermostat or servicing the water heater, make sure
the electrical supply to the water heater is turned
"OFF". Failure to do this could result in death,
serious bodily injury or property damage.
As a control option, the water heater may be provided with
an immersion thermostat(s) to activate magnetic
contactors allowing current to flow to the immersion
heating elements. The immersion thermostat option may
use up to one immersion thermostat for each 36kW of
electric heating power in a water heater. The sensing bulb
for each immersion thermostat is immersed in the stored
water in the tank to provide quick, accurate response to
changes in water temperature. The thermostat sensing bulb
is located in the tank just above the elements it is
controlling. The immersion thermostat set point is
adjustable by rotating a knob on the control. Turning the
knob counter clockwise decreases the temperature set point
and turning the knob clockwise increases the set point. The
temperature setting shown at the top of the knob is the
selected set point. The immersion thermostat has a fixed
6°F (3.3˚C) differential.

TEMPERATURE REGULATION

WARNING:
WARNING! HAZARD OF ELECTRICAL SHOCK -
Before opening the electrical access panel to adjust
the thermostat, make sure the electrical supply to the
water heater is turned "OFF".
DANGER
Full power is present whenever the cabinet door is
opened.
Set temperature control to the lowest setting which satisfies
the hot water requirements of the system. Lower water
temperatures help minimize scale formation on the heating
elements. See thermostat information below.
WATER TEMPERATURE SETTINGS
This water heater has an adjustable thermostat(s) to control
water temperature. The thermostat is factory pre-set at
approximately 125°F (51.7°C) or less. Households with
small children or invalids may require a 120°F (48.9°C) or
lower temperature setting to reduce risk of scald injury.
Some states may require a lower temperature setting.
Check with your local codes or electric utility for local
requirements governing
Remember, no water heating system will provide exact
temperatures at all times.
the temperature setting.
Allow a few days of operation at the setting to determine
the correct temperature setting consistent with your needs.
(1) This water heater, when set at the lower
temperature setting, is not capable of producing hot
water of sufficient temperature for sanitizing
purposes. (2) Higher stored water temperature
increases the ability of the heater to supply desired
quantities of hot water, however remember:
Hotter water increases the risk of scald injury.
Setting the temperature selector dial higher provides
hotter water, which increases the risk of scald injury.
FIG. 12 Hot Water Danger Label
The following chart details the relationship of water
temperature and time with regard to scald injury and may
be used as a guide in determining the safest water
temperature for your applications.
APPROXIMATE TIME / TEMPERATURE
RELATIONSHIPS IN SCALDS
120°F
125°F
130°F
135°F
140°F
145°F
150°F
155°F
10
NOTE:
CAUTION
CAUTION
More than 5 minutes
1 1/2 to 2 minutes
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 1 1/2 seconds
About 1 second