Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 192

3. Amount of refrigerant to be added <PUHY>
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 re-
frigerant in the outdoor unit
(kg[lbs-oz])
Outdoor unit model
Amount of pre-charged re-
frigerant in the outdoor unit
(kg[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])
Amount of added refrigerant (kg) = (0.2 x L
refrigerant (oz) = (2.15 x L
L : Length of ø15.88[3/4"] liquid pipe (m)
1
L : Length of ø12.7[1/2"] liquid pipe (m)
2
L : Length of ø9.52[3/8"] liquid pipe (m)
3
L : Length of ø6.35[1/4"] liquid pipe (m)
4
α, α' : Refer to the table below.
Total capacity of
connected indoor units
- 30
31 - 60
61 - 126
127 - 180
181 - 234
235 - 264
265 - 366
Round up the calculation result to the nearest 0.01kg. (Example: 16.44kg to 16.5kg)
Round up the calculation result in increments of 4oz (0.1kg) or round it up to the nearest 1oz.
(Example: 540.7oz to 544oz or 541oz)
P72 P96
7.0[15-7] 9.5[20-16]
P168 P192
22.0[48-9] 22.0[48-9]
) + (0.12 x L
1
' ) + (1.29 x L ' ) + (0.65 x L ' ) + (0.26 x L
1 2 3
α(kg) α'(oz)
1.0 36
1.5 53
2.0 71
2.5 89
3.0 106
4.0 142
5.0 178
- 183 -
P108
9.5[20-16] 13.0[28-11]
P204
22.0[48-9] 22.0[48-9]
) + (0.06 x L ) + (0.024 x L ) + αAmount of added
2 3 4
' ) + α'
4
L ' : Length of ø15.88[3/4"] liquid pipe [ft]
1
L ' : Length of ø12.7[1/2"] liquid pipe [ft]
2
L ' : Length of ø9.52[3/8"] liquid pipe [ft]
3
L ' : Length of ø6.35[1/4"] liquid pipe [ft]
4
[ VIII Test Run Mode ]
P126 P144
13.0[28-11]
P216 P234
22.0[48-9]