B-70315EN/02 3.INSTALLATION
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3.3.3 Checking Cooling Water
(1) Turn off the main circuit breaker of the oscillator and the power
supply.
(2) Check that the water piping is connected to the water inlet (IN)
and outlet (OUT) of the oscillator in the correct direction.
(3) Completely open the water piping of the outlet to let water flow
without any obstacle. Move the chiller unit manually to let
cooling water to flow at a rate of about 10 liters per minute.
In this condition, check for water leakage in the following:
• Water inlet (IN) and outlet (OUT) of the oscillator
• Water piping (tubes, fittings, and so on) inside the oscillator
(4) If the above checking shows that there is no water leakage, feed
cooling water to the oscillator at the specified flow rate. Set the
output pressure of the cooling water circulating unit to 0.5 MPa
(5 bar) or less.
In this condition, check for water leakage in the following:
• Water inlet (IN) and outlet (OUT) of the oscillator
• Water piping (tubes, fittings, and so on) inside the oscillator
MODEL Rated flow rate
C1000-E 40 liters/min
C2000-E 75 liters/min
C4000-E 160 liters/min
C5000-E 160 liters/min
C6000-E A 125 liters/min
C6000-E B 125 liters/min
(5) Stop the chiller unit, and change the operation mode from
manual (local) to automatic (remote).
(6) If there is no water leakage, turn on the oscillator start switch.
Check that the start command from the CNC to cooling water
circulating unit causes the cooling water circulating unit to
operate as specified by the command. If the flow rate is
insufficient, alarm No. 4072 (shortage of cooling water) is issued
soon after the chiller unit is started. If the alarm is issued, check
the pipe diameter, piping route, and the circulating unit
installation position, and take measures to reduce the pressure
loss.
(7) Check that the cooling temperature of cooling water is set to 20
to 30°C.
Normally, 27°C is recommended.