Flooded type water cooled screw chiller (PCB Control)
37
When cooling water inlet temperature >= 20°C (real time value), oil heating time for first startup
is 4hrs. If power down happens during operation and downtime is less than 1hrs, no heating
time delay is needed when unit restarts. If it exceeds 1hrs, 2h heating time is need. If it exceeds
5hrs, 3hrs heating time is need. If it exceeds 8hrs, 4hrs heating time is need.
When cooling water inlet temperature < 20°C (real time value), oil heating time for first startup is
8hrs. If power down happens during operation and downtime is less than 1hrs, no heating time
delay is needed when unit restarts. If it exceeds 1hrs, 3h heating time is need. If it exceeds 5hrs,
5hrs heating time is need. If it exceeds 8hrs, 8hrs heating time is need.
2). Pressure sensor Control
high pressure control
3). Discharge temp. Control
4). Return oil solenoid valve Control
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