INNOVAIR DC INVERTER NEXXOS
SERVICE MANUAL
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Refrigerant charging
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Procedure:
1.
Connect the charge hose to the 3-way service port
and then open the 2- and the 3-way valves.
2.
Connect the charge hose to the valve at the bottom
of the cylinder.
3.
If the refrigerant is R410A, invert the cylinder to
ensure a complete liquid charge.
4.
Open the valve at the bottom of the cylinder and close
the check valve on the charge set to purge the air.
5.
Place the charging cylinder onto an electronic scale
and record the starting weight.
6.
Operate the air conditioner in cooling mode.
7.
Open the valves (Low side) on the charge set and
charge the system with liquid refrigerant.
8.
When the electronic scale displays the correct weight
(refer to the gauge and the pressure of the low side
to confirm), disconnect the charge hose from the
3-way valve’s service port immediately and turn off
the air conditioner before disconnecting the hose.
9.
Mount the valve stem caps and the service port.
10.
Use a torque wrench to tighten the service port cap to
a torque of 18 N.m.
11.
Check for gas leakage.
Note: 1. Mechanical connectors used indoors shall comply with local regulations.
2. When mechanical connectors are reused indoors, sealing parts shall be renewed. When flared joints
are reused indoors, the flare part shall be re-fabricated.
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