Mitsubishi Electric PURY-P200YLM-A(1) Service Handbook page 192

[6-9 Evaluating and Adjusting Refrigerant Charge ]
(1) Calculation formula
The amount of refrigerant to be added depends on the size and the length of field piping. (unit in m[ft])
When the piping length to the farthest indoor unit is shorter than 30.5 meters (100 feet)
Amount of added refrigerant (kg) = (0.36 x L
Amount of added refrigerant (oz) = (3.88 x L
When the piping length to the farthest indoor unit is 30.5 meters (100 feet) or longer
Amount of added refrigerant (kg) = (0.33 x L
Amount of added refrigerant (oz) = (3.54 x L
L : Length of ø28.58[1-1/8"] high pressure pipe (m)
1
L : Length of ø22.2[7/8"] high pressure pipe (m)
2
L : Length of ø19.05[3/4"] high pressure pipe (m)
3
L : Length of ø15.88[5/8"] high pressure pipe (m)
4
L : Length of ø15.88[5/8"] liquid pipe (m)
5
L : Length of ø12.7[1/2"] liquid pipe (m)
6
L : Length of ø9.52[3/8"] liquid pipe (m)
7
L : Length of ø6.35[1/4"] liquid pipe (m)
8
α , α , α , α , α ' , α
1 2 3 4 1
Amount for the BC con-
trollers (standard/main)
Outdoor unit
model
α (kg)
1
(E)P200 model 3.0
(E)P250 model
4.5
(E)P300 model
(E)P350 model
(E)P400 model
(E)P450 model
(E)P500 model
(E)P550 model
(E)P600 model
6.0
(E)P650 model
(E)P700 model
(E)P750 model
(E)P800 model
(E)P850 model
(E)P900 model
HWE1314A
) + (0.23 x L
1
+ (0.12 x L ) + (0.06 x L ) + (0.024 x L
6 7
' ) + (2.48 x L
1
+ (1.30 x L ' ) + (0.65 x L ' ) + (0.26 x L
6 7
) + (0.21 x L
1
+ (0.11 x L ) + (0.054 x L ) + (0.021 x L
6 7
' ) + (2.26 x L
1
+ (1.19 x L ' ) + (0.59 x L ' ) + (0.23 x L
6 7
' , α ' , α ' : Refer to the table below.
2 3 4
BC controller (main)
α ' (oz)
1
106 HA1 type
1
160
BC controller (sub)
Total number of BC
1
2
212
) + (0.16 x L ) + (0.11 x L
2 3
) + α + α + α
8 1 2 3
' ) + (1.73 x L ' ) + (1.19 x L
2 3
' ) + α ' + α ' + α
8 1 2
) + (0.14 x L ) + (0.1 x L
2 3
) + α + α + α
8 1 2
' ) + (1.51 x L ' ) + (1.08 x L
2 3
' ) + α ' + α ' + α
8 1 2
L ' : Length of ø28.58[1-1/8"] high pressure pipe [ft]
1
L ' : Length of ø22.2[7/8"] high pressure pipe [ft]
2
L ' : Length of ø19.05[3/4"] high pressure pipe [ft]
3
L ' : Length of ø15.88[5/8"] high pressure pipe [ft]
4
L ' : Length of ø15.88[5/8"] liquid pipe [ft]
5
L ' : Length of ø12.7[1/2"] liquid pipe [ft]
6
L ' : Length of ø9.52[3/8"] liquid pipe [ft]
7
L ' : Length of ø6.35[1/4"] liquid pipe [ft]
8
β, β' : Refer to the table below.
Total capacity of con-
nected indoor units
α (kg) α ' (oz)
2 2
2.0 71
α (kg) α ' (oz)
3 3
1.0 35
2.0 71
1071
1251
- 181 -
)+ (0.2 x L )
4 5
+ α
4
' )+ (2.16 x L ' )
4 5
' + α '
3 4
)+ (0.18 x L )
4 5
+ α
3 4
' )+ (1.94 x L ' )
4 5
' + α '
3 4
Amount for the Indoor
unit
α (kg)
4
- 80 2.0
81 - 160 2.5
161 - 330 3.0
331 - 390 3.5
391 - 480 4.5
481 - 630 5.0
631 - 710 6.0
711 - 800 8.0
801 - 890 9.0
891 - 1070 10.0
- 1250 12.0
- 14.0
α ' (oz)
4
71
89
106
124
159
177
212
283
318
353
424
494
GB