The Amount Of Refrigerant To Be Added - Mitsubishi Electric PUHY-P200 Service Handbook

[6-9 Evaluating and Adjusting Refrigerant Charge ]
6-9-3

The Amount of Refrigerant to Be Added

The amount of refrigerant that is shown in the table below is factory-charged to the outdoor units.
The amount necessary for extended pipe (field piping) is not included and must be added on site.
Outdoor unit model
Amount of pre-charged refrigerant in
the outdoor unit (kg)
Amount of pre-charged refrigerant in
the outdoor unit [lbs-oz]
(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) = (0.29x L
Amount of added refrigerant (oz) = (3.1x L
When the piping length to the farthest indoor unit is 30.5 meters (100 feet) or longer
Amount of added refrigerant (kg) = (0.26x L
Amount of added refrigerant (oz) = (2.80x L
L : Length of ø19.05 [3/4"] liquid pipe (m)
1
L : Length of ø15.88 [5/8"] liquid pipe (m)
2
L : Length of ø12.7 [1/2"] liquid pipe (m)
3
L : Length of ø9.52 [3/8"] liquid pipe (m)
4
L : Length of ø6.35 [1/4"] liquid pipe (m)
5
α, α': Refer to the table below.
Total capacity of
connected indoor units
- 80
81 - 160
161 - 330
331 - 390
391 - 480
481 - 630
631 - 710
711 - 800
801 - 890
891 - 1070
1071 - 1250
1251 -
Round up the calculation result to the nearest 0.1kg. (Example: 18.04kg to 18.1kg)
Round up the calculation result in increments of 4oz (0.1kg) or round it up to the nearest 1oz.
(Example: 178.21oz to 179oz)
When connecting PEFY-P20VMA3-E, add 0.54 kg of refrigerant per indoor unit.
HWE14040
P200 P250
6.5 8.0
14-6 17-11
) + (0.2 x L ) + (0.12 x L
1 2
' ) +(2.15 x L ' ) + (1.29 x L
1 2
) + (0.18 x L
1 2
' ) +(1.94 x L
1
L ': Length of ø19.05 [3/4"] liquid pipe [ft]
1
L ': Length of ø15.88 [5/8"] liquid pipe [ft]
2
L ': Length of ø12.7 [1/2"] liquid pipe [ft]
3
L ': Length of ø9.52 [3/8"] liquid pipe [ft]
4
L ': Length of ø6.35 [1/4"] liquid pipe [ft]
5
α (kg) α' (oz)
2.0 71
2.5 89
3.0 106
3.5 124
4.5 159
5.0 177
6.0 212
8.0 283
9.0 318
10.0 353
12.0 424
14.0 494
- 132 -
P300 P350 P400
11.5 11.5 11.5
25-6 25-6 25-6
) + (0.06 x L ) + (0.024 x L
3 4
' ) + (0.65 x L
3
) + (0.11 x L ) + (0.054 x L
3
' ) + (1.19 x L ' ) + (0.58 x L
2 3
P450 P500
11.8 11.8
26-1 26-1
) +α
5
' ) + α'
' ) + (0.26 x L
4 5
) + (0.021 x L ) +α
4 5
' ) + α'
' ) + (0.23 x L
4 5
GB