iglu Inuit 6I, Installation Manual

Page: 69 / 73

69
COLLECTING REFRIGERANT IN REFRIGERANT VESSEL BEFORE PUMP DOWN
OPERATION
If the amount of refrigerant in the system exceeded the maximum allowable limit, reduce the amount of refrigerant by
following the below instructions before the pump down operation.
1. Prepare an exclusive rechargeable refrigerant vessel, scale, and manifold gauge.
2. Check the amount of refrigerant in the entire system.
3. Connect a refrigerant vessel to an outdoor unit and operate about 50 % of the indoor unit in cooling mode.
4. After 10 minutes of cooling operation, check the pressure on the high-pressure side with the manifold gauge. If the
pressure on the high-pressure side is over 3.0 MPa (30.59 kgf/cm²), g reduces the number of operating indoor unit to
decrease the pressure below 3.0 MPa (30.59 kgf/cm²).
5. When the pressure becomes lower than 3.0 MPa (30.59 kgf/cm²) open the manifold gauge valve
􀋆 which is connected
to a liquid side. Then, open the valve on the refrigerant vessel for the refrigerant to flow from the liquid side pipe to a
vessel.
6. Check the weight difference with the scale. When the desired amount of the refrigerant is collected into the vessel, close
the valve and remove the manifold gauge.
7. Make sure that the amount of refrigerant in the vessel is about 50 % of the entire system.
8. Measure the amount of refrigerant correctly to not exceed the amount of collected refrigerant.