Hatco IMPERIAL "S" - Manual (Page 29)

Form No. EBOOSTERM-0406 27
MAINTENANCE
Figure 19. Thermostat Adjustment
GENERAL
WARNING
To avoid any injury or damage to the booster
heater turn the power OFF at the disconnect
switch/circuit breaker and allow to cool before
performing any maintenance or adjustments.
THERMOSTAT
Thermostat Adjustment
The thermostat is factory calibrated to produce
temperatures of 185°-190°F (85°-88°C). If
adjustment or recalibration is required use the
following procedure. (See Figures 18 and 19.)
NOTE: Low Temperature Dishmachines require the
thermostat(s) to be adjusted to 140°-150°F
(60°-66°C).
1. Remove the access cover.
To lower the temperature setpoint, turn the outer
adjustment screw counterclockwise.
To raise the temperature setpoint, turn the outer
adjustment screw clockwise.
NOTE: 1/6 turn of the outer screw equals 12°F
(6.7°C).
If recalibration is necessary, with the outer screw at
high stop turn inner adjustment screw clockwise to
raise the set point.
NOTE: 1/6 turn of the inner screw equals 8°F
(4.4°C).
HIGH TEMPERATURE LIMIT SAFETY
SWITCH
All Hatco Electric Booster Water Heaters are
equipped with a manually reset high temperature
limit safety switch. If the temperature of the water in
the heater exceeds 210°F (99°C) the safety switch
will shut off the power. The switch must be manually
reset by pushing the red button.
If the high temperature limit safety switch needs to
be reset use the following procedure
(See Figures 18 and 20.):
1. Remove access cover.
2. Push red reset button.
3. If tripping repeats, call an Authorized Service
Agent.
Outer Screw
Inner Screw
Figure 18. Access Cover for Thermostat(s) and High
Temperature Limit Safety Switch
Access Cover
Figure 20. High Temperature Limit Safety Switch
Red Reset Button