Gardner Denver EAH99C Operating And Service Manual page 33

Discharge Thermistor - This sensor is located directly in the compressor discharge. Its signal is used
to monitor compressor temperature and shut down the compressor if a coolant problem is detected.
Reservoir Thermistor - This sensor is located near the separator and is used to monitor temperature
and shut down the compressor if high temperatures are detected.
Emergency Stop Push-Button - This is a maintained push-button, and removes power from the
controller outputs regardless of controller status. It is located on the upper section of the panel, next to
the keypad. This should be used for emergency purposes only - use the keypad [STOP/RESET] for
normal controlled stopping.
Automatic restarting or electrical shock can cause injury or death. Open,
lockout and tagout main disconnect and any other circuits before servicing
unit.
Control Transformer - This control device changes the incoming power voltage to 110-120 volts for use
by all unit control devices. The transformers employed are usually connectable for several input voltages,
refer to the transformer label for connection prior to energizing. Two primary and one secondary fuse are
provided. Refer to adjacent labeling for replacement information.
Terminal Strip - This provides connections for all 110-120 volt devices not contained within the
enclosure.
Fan Starter - The starter is used to provide control and overload protection for the cooling fan or the
ventilation fan of water-cooled units with enclosure. Overload heaters should be selected and adjusted
based on the motor nameplate amps and the instructions located inside the cover of the electrical
enclosure. Three fuses are provided. Refer to adjacent labeling for replacement information.
Main Starter - This starter is used to provide control and overload protection for the main drive motor.
Full voltage starters employ a single contactor, overload heaters should be selected and adjusted based
on the motor nameplate amps and the instructions located inside the cover of the enclosure. Wye-delta
starters employ three contactors which are controlled sequentially to provide low current starting. For
wye-delta starters, the motor nameplate amps must be first multiplied by 0.577 before using the heater
table.
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