7
Injecting Water to Expel Gas
4.6
• To avoid blockage of the heat exchanger in the smart cooling product due to foreign
matter from the main pipe during the construction, you are advised to clean the main pipe
before water is supplied to the smart cooling product. Turn off the isolation valves on the
water inlet and outlet pipes before the cleaning and turn them on afterwards.
• Open the exhaust valve of each heat exchanger to exhaust nitrogen onsite.
1. Open the general water supply valve.
2. Verify that the chilled water valve is open (100%). If not, press the button on the side of the
actuator, and manually rotate the valve handle to the maximum.
3. Slowly open the exhaust valve to discharge gas.
4. Adjust the gas exhausting speed until no gas flows out of the valve. Then close the exhaust valve.
5. Manually close the chilled water valve.
Leakage Test with Water
4.7
1. Manually open the chilled water valve.
2. Raise the water pressure in the chilled water pipe to 0.8 MPa. If no leakage occurs after 30
minutes, retain the pressure for 24 hours. The expected result is that the pressure drop is less
than 0.01 MPa and the pipe does not leak.
3. Release the pressure in the pipes, and manually close the chilled water valve.
Connecting the Power Cable and Equipotential Bonding Cable
5.1
5
Connecting Cables
• Route and bind the cables along the beams and columns of the unit.
• The cabinet has no input neutral wire. You can cut the blue neutral wire and wrap it using
insulation tape.
Connecting the Equipotential Bonding Cable
In the example, the cable is routed from the
top of the cabinet. The underfloor ground
cable is routed through the cabinet bottom.
If a leakage test with nitrogen has been performed, you do not need to perform a leakage test
with water.
