Mitsubishi Electric PUHY-RP200YJM-A Manual De Instrucciones página 4

2.2 Procedures for refrigerant oil recovery
1Evacuating the existing pipes, and ensuring air tightness
Procedure 1
Charge airtight gas through the service port on both the liquid and gas valves. The air tightness should be 4.15 MPa. After checking
the air tightness, evacuate the air through the service port on both the liquid and gas valves.
2Refrigerant charging
Procedure 2
Charge the required amount of refrigerant (indoor units + pipes) through both the liquid and gas service port valves. See the table
below for the required amount of refrigerant for the indoor units. To calculate the required amount of refrigerant charged for the pipes, refer to
10.1. "Calculation of additional refrigerant charge" in the installation manual on the CD-ROM. If there is excess refrigerant that cannot be charged,
use it during oil recovery operation at step 4 (cooling operation) or step 5 (heating operation).
* Refer to "6 Refrigerant oil recovery operation" for details.
* After charging the required amount of refrigerant to the existing pipes, open the valve so that the pressure in the existing pipes and outdoor unit
are equal. (Refer to Procedure 3.) Do not open the valve on the outdoor unit when the existing pipes are under vacuum. Doing so may cause
the refrigerant that is dissolved in the refrigerant oil in the compressor to form and cause some oil to migrate to the existing pipes, resulting in
insufficient lubrication.
Liquid valve
Gas valve
Liquid valve
4
Gas valve
Total indoor unit capacity and required
refrigerant charge
Total indoor unit capacity
- 80
81 - 160
161 - 330
331 - 390
391 - 480
481 - 630
631 - 710
711 - 800
801 - 890
891 - 1070
1071 -
Refrigerant charge for
the indoor units (kg)
2.0
2.5
3.0
3.5
4.5
5.0
6.0
8.0
9.0
10.0
12.0