Rev.20170601 V1.0E HPC INSTALLATION & OPERATION MANUAL 7
pressure bypass valve for controlling high pressure to your machine.
POWER CONNECTION
The HPC 70-00DF(SF) is shipped from the factory wired for Low Voltage operation(60HZ 220V).
Motor rotational direction is optional.
The unit must be properly grounded.
Alarm Control Circuit
The HPC is equipped with a Pressure Switch and a Differential Pressure Switch to monitor coolant supply
conditions at the inlet of the pump.
Pressure Sensing Connection
The 70-00DF(SF) Pressure Switch is plumbed to the HPC inlet fitting to monitor coolant supply, and will provide
a signal at 0.2 Bar(2.5psi) inlet pressure, indicating a coolant supply problem. Normally open and closed contacts
are available.
Please set up 10 seconds of DELEY TIME for time filled filter vessel with coolant when HPC is runing at the
beginning. It may cause Inlet pressure alarm to make trouble.
Differential Pressure Sensing Connection
The 70-00DF(SF) Differential Pressure Switch is plumbed to the filter inlet and outlet fittings to monitor
differential pressure across the filter. As the filter element collects particulate, differential pressure across the filter
will develop. At approximately 8-10 psi/d the HPC Pressure Differential Switch will activate, indicating the need
for filter maintenance. Normally open and closed contacts are available.
Please set up 10 seconds of DELEY TIME for time filled filter vessel with coolant when HPC is runing at the
beginning. It may cause differential pressure alarm to make trouble.
Refer to the following schematics for optional electrical configuration.
Contact HPC technical support at Fax (052)288-4036 in Korea with any questions.
Section Ⅴ - Prior to Initial Start-Up
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