ICC / ICU SYSTEM INSTALLATION MANUAL
January2005: E\Manuals\Others\Qualitair\ICC\0412115B
14
System Charge Weights
5)
Disconnect the vacuum pump and connect the gauge high pressure port (9) to the discharge line
of the outdoor unit shut-off valve (10), ensuring that the gauge central port (3) is closed. Run
the system, allow pressures to stabilise and ensure correct operation. After final commissioning
remove the gauge set, fit all valve caps and carry out a final refrigerant leak test.
4)
Refrigerant Charging - Open both the outside unit shut off valves (7 & 8) to release the factory
refrigerant into the system. Weigh in the site top-up charge using a charging station and any
additional extended pipe run charge as detailed in Table 10.1 above.
3)
System Isolation - After achieving the specified system vacuum close the gauge low pressure port
(5) and switch off the vacuum pump. Leave the system for 1 hour and check that the vacuum is
maintained. If not, check for leaks, rectify and repeat the pumping down to 200 microns.
Note: Ensure gauge low pressure port (5) is open and high pressure port (6) is closed.
2)
Vacuum Pump - Connect the centre line port (3) of the manifold gauge set to the vacuum pump
(4) and operate the pump to ensure a vacuum of 200 microns.
1)
Service gauges - Connect the low pressure port (1) of a manifold gauge set to the suction line
outdoor unit shut off valve service port (2).
After completing the refrigerant connections the following steps should be followed with reference to
Figure 11.2 above.
11.1 Evacuation, Charging and Refrigerant Procedures
11. REFRIGERATION COMMISSIONING
Figure 10.1 – Refrigerant Schematic Diagrams
Figure – 11.2 Evacuation and Charging Connections
ICU30
ICU40
ICU55
ICU80
Base Charge
600g
1100g
1600g
1900g
Site Top-up Charge
0g
0g
50g
100g
Top up charge/m > 5m
25g
25g
40g
40g
