Samsung AE RXEDEG Series Installation Manual page 47

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 the refrigerant
by following the below instruction before pump down operation.
1. Prepare an exclusive rechargeable refrigerant vessel, scale and a manifold gauge.
2. Check the amount of refrigerant in the entire system.
3. Connect a refrigerant vessel to an outdoor unit and operated about 50 % of the indoor unit in cooling mode.
4. After 10 minutes of cooling operation, check the pressure on 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 reduce 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 ② 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 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 the refrigerant in the vessel is about 50 % of the entire system.
8. Measure the amount of refrigerant correctly to not exceed amount of collected refrigerant.
Refrigerant
R-32
vessel valve
Scale
Outdoor unit
Liquid side
Gas side
Valve ①
Valve ②
Manifold gauge
ENGLISH-47
Service valve