Maintenance; General; Thermostat Adjustment; High Temperature Limit Safety Switch - Hatco Imperial S Series Installation And Operating Manual

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General

Electric Booster Water Heaters are designed for maximum
durability and performance with minimum maintenance.
WARNING
ELECTRIC SHOCK HAzARD:
• Turn OFF power at fused disconnect switch/circuit
breaker and allow unit to cool before performing any
cleaning, adjustments, or maintenance.
• This unit must be serviced by qualified personnel only.
Service by unqualified personnel may lead to electric
shock or burn.
• Use only Genuine Hatco Replacement Parts when
service is required. Failure to use Genuine Hatco
Replacement Parts will void all warranties and may
subject operators of the equipment to hazardous
electrical voltage, resulting in electrical shock or burn.
Genuine Hatco Replacement Parts are specified to
operate safely in the environments in which they are
used. Some aftermarket or generic replacement parts
do not have the characteristics that will allow them to
operate safely in Hatco equipment.
This unit has no "user-serviceable" parts. If service is
required on this unit, contact an Authorized Hatco Service
Agent or contact the Hatco Service Department at
800-558-0607 or 414-671-6350; fax 800-690-2966; or
International fax 414-671-3976.

Thermostat Adjustment

The thermostat is factory calibrated at 185°–190°F (85°–88°C).
If adjustment or recalibration is required due to the rigors of
transportation, use the following procedure.
NOTE: Low temperature dish machines require the thermostat(s)
to be adjusted to 140°–150°F (60°–66°C).
1. move the Power ON/OFF (I/O) switch to the OFF (O)
position and unplug the unit from the power source.
2. Remove the access cover.
3. adjust the temperature setpoint to the desired temperature.
• To lower the temperature setpoint, turn the outer screw
counterclockwise.
• To raise the temperature setpoint, turn the outer screw
clockwise.
NOTE: 1/6 turn of the outer screw equals 12°F (6.7°C).
NOTE: If recalibration is necessary, with the outer screw at high
stop, turn the inner screw clockwise to raise the set
point.
NOTE: 1/6 turn of the inner screw equals 8°F (4.4°C).
Form No. EBOOSTERm-0613

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.
If the high temperature limit safety switch needs to be reset use
the following procedure:
1. move the Power ON/OFF (I/O) switch to the OFF (O)
position and unplug the unit from the power source.
2. Remove the access cover.
3. Push the red reset button.
4. If tripping repeats, call an authorized Service agent.
Do NOT attempt to adjust the High Temperature Limit
Safety Switch.
Front View of
Thermostat
Adjustment Screws
Outer
Screw
Access Cover
Thermostat adjustment and High Temperature Limit Safety Switch
(Imperial "S" model Shown)
25

MAINTENANCE

Inner
Screw
Thermostat Thermostat
Adjustment Adjustment
Screw Screw
High Limit Switch
Reset Button