Section 5-Operation; General; Purpose Of Controls - Sullair E900H User Manual

5.1

GENERAL

While Sullair has built into this compressor a comprehensive array of controls and indicators to assure you that
it is operating properly, you will want to recognize and interpret the readings which will call for service or
indicate the beginning of a malfunction. Before starting your Sullair compressor, read this section thoroughly
and familiarize yourself with the controls and indicators—their purpose, location and use.
5.2

PURPOSE OF CONTROLS

Table 5-1: Purpose of Controls
CONTROL OR INDICATOR
START/STOP SWITCH
SUMP PRESSURE GAUGE
HOUR METER
DISCHARGE TEMPERATURE GAUGE
DISCHARGE TEMPERATURE SWITCH & HIGH
DISCHARGE TEMPERATURE LAMP
SEPARATOR DIFFERENTIAL PRESSURE GAUGE
FLUID FILTER DIFFERENTIAL PRESSURE GAUGE
EMERGENCY STOP/RESET SWITCH
POWER/RUN INDICATORS
MAIN MOTOR/FAN MOTOR OVERLOAD INDICATOR
FAN FORWARD/REVERSE SWITCH
MOTOR HEATER SWITCH
PHASE MONITOR RELAY
GROUND FAULT PROTECTOR
Section 5
OPERATION
02250203-986 R01
PURPOSE
Utilized to start and stop the compressor. Upon stopping,
the compressor will continue to run for a short time in
order to relieve sump pressure.
Displays receiver tank pressure of the compressor during
all phases of operation.
Displays accumulated run time of the compressor.
Displays temperature at the compressor discharge.
If the high operating temperature limit of 250°F (121°C) is
exceeded, the compressor will be stopped and the High
Discharge Temperature lamp lit. After addressing the
cause of the fault, it is reset by depressing and re-setting
the emergency stop button.
Displays the pressure difference between the wet and
high side of the separator element. Refer to Section 6:
MAINTENANCE for recommended service intervals.
Displays the pressure difference between the inlet and
outlet of the fluid filter. Refer to Section 6:
MAINTENANCE for recommended service intervals.
When depressed, the compressor is stopped.
Additionally when depressed and reset, the High
Temperature Alarm is reset.
The power indicator is lit when power is connected to the
machine and the main disconnect is closed. The run
indicator is lit once the compressor is started.
These indicators are lit if the motors are overloaded.
Once the fault is addressed and the motor overload
relays are reset, the indicators will be reset. Refer to
Section 7: Troubleshooting for potential causes.
This switch controls the rotation direction of the cooling
fan. See Section 5.6 for details.
This switch activates the internal heaters in the main
motor. See Section 5.5 for details.
Prevents the compressor from starting with incorrect
phase order, loss of phase and under or over voltage.
The protector contact will trip on the 110V circuit if a
ground fault is detected. This will shut down the
compressor or prevent it from starting.
E900H USER MANUAL
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