Sumitomo HC-4E1, Technical Manual

Page: 37 / 64

OPERATION
33
Operation
Starting and stopping are the only operating procedures performed at the compressor.
Prestart Check
Before starting the compressor, be sure that all other system components to be used are
properly connected and ready for operation. Refer to the instructions supplied with the other
components.
When the compressor is at room temperature, 20° C (68° F), the pressure gauge should
indicate 1650 - 1690 kPa (240 - 245 psig). Higher or lower temperatures will result in
correspondingly higher or lower pressures, but these pressure changes are normal. Abnormally
lower readings indicate that some of the gas charge has been lost. Refer to the Maintenance
section for instructions on charging, cleaning and leak checking.
Starting
Close the circuit breaker by pushing up the handle.
Press the power switch.
The indicator in the switch will light. The compressor will start. Any items drawing power from
the compressor will start.
PREVENT EQUIPMENT DAMAGE. After starting the system for the first time,
to be certain that the water lines are properly connected, check that the outlet
water temperature is warmer than the inlet water.
Stopping
At the compressor, press the power switch.
The indicator light in the switch will go off. The compressor will stop. Any items drawing power
from the compressor will stop.
Restarting after a Power Failure
If the compressor stops due to a power interruption, it is designed to restart immediately after
power
has been restored. If the compressor stops for other reasons, refer to the Troubleshooting
section of this manual.