Mitsubishi Electric PUHY-P168, Service Handbook

Page: 192 / 404

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