Temperature Limit Control - Lochinvar Commercial Electric Water Heaters Installation And Service Manual

WARNING:
SHOULD OVERHEATING OCCUR OR THE
TEMPERATURE CONTROLS FAIL TO SHUT OFF,
TURN OFF OR DISCONNECT THE ELECTRICAL
SUPPLY AT THE MAIN POWER DISCONNECT,
EXTERNAL TO THE APPLIANCE.
DANGER
• Water temperature over 125°F (51.7°C) can
cause severe burns instantly or death from scald.
• Children, disabled and elderly are at highest
risk of being scalded.
• See instruction
temperature at heating appliance.
• Feel water before bathing or showering.
• If this appliance is used to produce water that
could scald if too hot, such as domestic hot
water use, adjust the outlet control (limit) or
use temperature limiting valves to obtain a
maximum water temperature of 125˚F (51.7˚C).
Always close the electrical control panel door after
making a temperature adjustment.
electricity.
TEMPERATURE ADJUSTMENT
1. Turn "OFF" the electrical power to the water heater. If
the power disconnect point is out of sight, lock it in the
open ("OFF") position and tag to prevent unexpected
application of power.
2. Open the water heater's electrical access panel.
3. Adjust each immersion thermostat to the desired
temperature setting by turning the adjusting knob. Each
thermostat will be factory pre-set to approximately 125°F
(51.7°C) or less as shipped.
4. Close the water heater's electrical access panel.
5. Turn "ON" the electrical power to the water heater.
CAUTION
The maximum temperature setpoint that should be
set for the Surface or Immersion Thermostats is
190°F (88°C).
manual before setting
Turn on
HIGH WATER TEMPERATURE
LIMIT CONTROL
FIG. 13 High Water Temperature Limit Control -
Fixed Setting
The unit is equipped with a fixed setting, manual-reset high
water temperature limit control(s). The water heater
temperature limit control has a fixed limit setting of 195°F
(90.6°C). If water temperature exceeds the limit set point,
the limit will break the control circuit and shut down the
unit. The limit control can only be reset after the water
temperature has cooled below the set point of the limit. The
high water temperature limit control for the standard
surface thermostat controls is the contained in the upper
portion of the surface thermostat and mounted above each
heating element. The high water temperature limit control
for the immersion thermostat and contactor option is
mounted on the surface of the tank, above the heating
element installed at the highest point in the tank. The limit
control is covered with an insulation blanket which must be
removed to push the red reset button.
Disconnect the main power to the heater before
opening the element access panel to reset the high
limit control.
The high limit control will not reset until the water
temperature has dropped below the set point of the
high limit.
11
CAUTION
NOTE: