14-3.Refrigerant Charging Calculation (Pwfy-Au With R2 System) - Mitsubishi Electric City Multi PWFY-P100VM-E-BU Data Book

14. PIPING DESIGN
14-3. Refrigerant charging calculation (PWFY-AU with R2 system)
It is needed to add extra refrigerant if the system is under the following conditions.
See the attachment for how to decide the amount of refrigerant to be added to each outdoor unit.
The graph below shows an example.
600
550
500
450
400
350
300
250
Need to add refrigerant
200
150
100
50
0
45
A
C
PURY-P200 PURY-EP200
250
200
150
Additional
100
Refrigerant
50
0
16 18 20
System refrigerant [kg]
PURY-P300 PURY-EP300
300
250
200
Additional
150
Refrigerant
100
50
0
16 18 20 22 24
System refrigerant [kg]
MEES19K013
B
D
C
A
55 65
System total refrigerant amount [kg]
Main pipe: 40m
PWFY: P200 x 4, Pipe 12.5m each
Main pipe: 40m
PWFY: P200 x 2, Pipe 25m each
IC: P50 x 10, Pipe 20m each (100%)
Extra charge amount (kg): BC to PWFY pipe length (m) × 0.1
OK Zone
22 24 26 28
OK Zone
26 28 30 32 34 36 38 40
O/U: P900
Total capacity: 150%
75 85
B
Main pipe: 40m
PWFY: P200 x 4, Pipe 25m each
Main pipe: 40m(BC) + 20m(BS)
D
PWFY: P200 x 4, Pipe 25m each
IC: P50 x 11, Pipe 20m each (150%)
PURY-P250 PURY-EP250
300
250
200
Additional
150
Refrigerant
100
50
0
30 16 18 20 22
System refrigerant [kg]
PURY-P350 PURY-EP350
400
350
300
250
Additional
200
Refrigerant
150
OK Zone
100
50
0
20 22 24 26
System refrigerant [kg]
AIR TO WATER
95 105
OK Zone
24 26 28 30 32 34 36
28 30 32 34 36 38 40
38 40
42 44
49