Piping Design; 14-1.Refrigerant Charging Calculation (Pwfy-Au With R2 System Or H2I R2 System) - Mitsubishi Electric City Multi PWFY-P36NMU-E-BU Data Book

14. PIPING DESIGN

14-1. Refrigerant charging calculation (PWFY-AU with R2 system or H2i R2 system)
14. PIPING DESIGN
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 [1,968]
550 [1,804]
500 [1,640]
450 [1,476]
400 [1,312]
350 [1,148]
300 [984]
250 [820]
Need to add refrigerant
200 [656]
150 [492]
100 [328]
50 [164]
0 [0]
45 [100]
A
C
PURY-(H)P72
250
[820]
200
[656]
150
[492]
Additional
100
Refrigerant
[328]
OK Zone
50
[164]
0
16 18 20
[36] [40] [45]
System refrigerant (kg [lbs])
PURY-P120
400
[1,312]
350
[1,148]
300
[984]
250
[820]
Additional
200
[656]
Refrigerant
150
[492]
100 OK Zone
[328]
50
[164]
0
20 22 24 26 28
[45] [49] [53] [58] [62]
System refrigerant (kg [lbs])
MEES20K028
B D
A
C
55 [122] 65 [144]
System total refrigerant amount (kg [lbs])
Main pipe: 40m [131ft.]
PWFY: P200 x 4, Pipe 12.5m [41ft.]
each
Main pipe: 40m [131ft.]
PWFY: P200 x 2, Pipe 25m [82ft.] each
IC: P50 x 10, Pipe 20m [65ft.] each
(100%)
Extra charge amount (kg [lbs]): BC to PWFY pipe length (m [ft.]) × 0.1
22 24 26 28
[49] [53] [58] [62]
30 32 34 36 38 40 42
[67] [71] [75] [80] [84] [89] [93] [98]
75 [166] 85 [188]
B Main pipe: 40m [131ft.]
PWFY: P200 x 4, Pipe 25m [82ft.] each
D Main pipe: 40m [131ft.](BC) + 20m [65ft.](BS)
PWFY: P200 x 4, Pipe 25m [82ft.] each
IC: P50 x 11, Pipe 20m [65ft.] each (150%)
PURY-(H)P96
300
[984]
250
[820]
200
[656]
Additional
150
Refrigerant
[492]
100
[328]
50
[164]
0
16 18 20
30
[36] [40] [45]
[67]
PURY-(H)P144
400
[1,312]
350
[1,148]
300
[984]
250
Additional
[820]
Refrigerant
200
[656]
150
[492]
100
[328]
50
[164]
0 0
44 24 26 28 30
[53] [58] [62] [67]
O/U: P900
Total capacity: 150%
95 [210] 105 [232]
OK Zone
22 24 26 28 30 32 34
[49] [53] [58] [62] [67] [71] [75]
System refrigerant (kg [lbs])
OK Zone
32 34 36 38 40 42 44
[71] [75] [80] [84] [89] [93] [98]
System refrigerant (kg [lbs])
AIR TO WATER
36 38 40
[80] [84] [89]
46 48 50
[102] [106] [111]
48