Flooded Type Water Cooled Screw Chiller Technical Manual
4
1.3 Function
Item
Fuction Name
Description
Protection
function
high
pressure
protection
shutdown when high pressure exceeds set value
low pressure protection
shutdown when low pressure is lower than set value
Compressor overload
protection
shutdown when operating current of compressor exceeds max
operating current
superheat protection of
compressor winding
shutdown when winding of compressor motor exceeds a certain
temperature
high
discharge
temperature protection
Shutdown when discharge temperature exceeds setting value
phase
sequence
protection (phase lost
and reversal)
shutdown in case of phase lost or reversal
Excessive voltage and
less voltage protection
shutdown when input voltage is morer or les than set high voltage and
low voltage value
high and low voltage
difference protection
shutdown when the difference between high voltage and low voltage is
lower than setting value
Oil pressure difference
protection
shutdown when front and rear pressure difference of oil filter of
compressor exceed set value
oil level protection of
compressor
shutdown under when oil level of compressor is too low
anti-freezing protection shutdown when temperature is too low
failure protection of
temperature sensor
shutdown in case of temperature sensor failure
failure protection of
pressure sensor
shutdown in case of pressure sensor failure
temperature difference
protection when back
water flow
shutdown when temperature difference of cooling water exceeds set
value
temperature difference
protection
when
excessive water flow
shutdown when temperature difference of cooling water is lower than
setting value
flow protection of chilled
water pump
protect in case of chilled water flow lacking
flow
protection
of
cooling water pump
protect in case of I cooling water flow lacking
Operation
function
clock display
display year, month, day and time
timing ON/OFF function Set timing ON/OFF function
operating
parameter
display
display inlet & outlet temperature and high & low pressure of chilled
water and cooling water
protection information
inquiry
display and inquire protection information
automatic load and
unload
automatically load and unload according to actual requirement
water temperature set
Set water temperature within a certain range (10
℃
～
15
℃
)
