24
Pre-Start-up
Type
Lower limit of flow
Rated flow
Upper limit of flow
Connection
Dimension
CGAR0305
20.5
31.5
41.0
1"
CGAR0306
22.3
34.3
44.6
1"
CGAR0505
26.0
40.0
52.0
1"
CGAR0605
32.1
49.3
64.1
1"
CGAR0755
44.2
68.0
88.4
1 1/4"
CGAR0606
41.4
63.6
82.7
1 1/4"
CGAR1005
52.5
80.8
105.1
1 1/4"
CGAR1205
71.7
110.3
143.4
1 1/4"
CGAR1505
91.5
140.8
183.1
1 1/4"
CGAR2005
102.5
157.7
205.0
1 1/2"
Check the following items before start
• Check connection of all wiring, and all electric connection points shall be kept clean and locked
tightly.
• Check if the power voltage of the water chiller is normal.
• Fully fill the cold water loop with water, and the exhaust valve of the system shall be kept open
during filling, which shall be closed after the loop being filled fully.
• Make short circuit connection on flow switch to test the water system.
• Power on the main power and press the ON/OFF button on the control panel to start the water
chiller, then the water pump shall start up and the water flows circularly in the cold water
system, please check if there is any leakage at all piping connection points.
• Adjust the water flow in the cold water loop, to inspect the external water pressure of the water
chiller (for the standard model) or pressure drop of the evaporator (for the model without water
pump).
• Stop operation of the water pump. Shut off all power supply.
• Connect the flow switch to the connection point on the terminal block in the control box.
Table 3. Water volume
L/min
WARNING
When the ambient temperature is below 16
℃
in winter, please do not cut off the power, and
preheat the water chiller 24 hours before starting it, or else the compressor will be damaged.
CAUTION
When the water pump is running, the water flow shall be adjusted to 50%of the maximum
flow rate, and the connection point of the flow switch shall be adjusted as open circuit. Please
use ohmmeter to verify if the connection point of the switch is open or close.
NOTICE:
If the actual water flow rate is less than70%*rated flow, the return water temperature of
refrigeration is required being set ≥10
℃
; or else it is necessary to add antifreezer into the water
system (volume concentration of glycol in the water system has to be ≥15%);
