Mitsubishi Electric PURY-P120Y(T)HMU-A, Service Handbook

Page: 167 / 387

[
VIII
Test Run Mode ]
- 158 - HWE0803A GB
3. 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.
(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 0.1kg. (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: 78.21oz to 79oz)
Outdoor unit model P72 P96 P120
Amount of pre-charged refrigerant
in the outdoor unit (kg)
10.5 11.8 11.8
Amount of pre-charged refrigerant
in the outdoor unit [lbs-oz]
23-2 26-1 26-1
Amount of added refrigerant (kg) = (0.36 x L
1
) + (0.23 x L
2
) + (0.16 x L
3
) + (0.11 x L
4
)+ (0.2 x L
5
)
+ (0.12 x L
6
) + (0.06 x L
7
) + (0.024 x L
8
) +
ǩ
1
+
ǩ
3
+
ǩ
4
Amount of added refrigerant (oz) = (3.88 x L
1
' ) + (2.48 x L
2
' ) + (1.73 x L
3
' ) + (1.19 x L
4
' )+ (2.16 x L
5
' )
+ (1.30 x L
6
' ) + (0.65 x L
7
' ) + (0.26 x L
8
' ) + ǩ
1
' + ǩ
3
' + ǩ
4
'
L
1
: Length of ø28.58[1-1/8"] high pressure pipe (m)
L
2
: Length of ø22.2[7/8"] high pressure pipe (m)
L
3
: Length of ø19.05[3/4"] high pressure pipe (m)
L
4
: Length of ø15.88[5/8"] high pressure pipeŠ (m)
L
5
: Length of ø15.88[5/8"] liquid pipe (m)
L
6
: Length of ø12.7[1/2"] liquid pipe (m)
L
7
: Length of ø9.52[3/8"] liquid pipe (m)
L
8
: Length of ø6.35[1/4"] liquid pipe (m)
ǩ
1,
ǩ
3,
ǩ
4
, ǩ
1
' , ǩ
3
' , ǩ
4
' : Refer to the table below.
L
1
' : Length of ø28.58[1-1/8"] high pressure pipe [ft]
L
2
' : Length of ø22.2[7/8"] high pressure pipe [ft]
L
3
' : Length of ø19.05[3/4"] high pressure pipe [ft]
L
4
' : Length of ø15.88[5/8"] high pressure pipe [ft]
L
5
' : Length of ø15.88[5/8"] liquid pipe [ft]
L
6
' : Length of ø12.7[1/2"] liquid pipe [ft]
L
7
' : Length of ø9.52[3/8"] liquid pipe [ft]
L
8
' : Length of ø6.35[1/4"] liquid pipe [ft]
Outdoor unit total
index
Amount for the BC
controllers (main/sub)
BC controller (sub)
Total capacity of
connected indoor
units
Amount for the Indoor
unit
ǩ
1
(kg)
ǩ
1
' (oz)
ǩ
4
(kg)
ǩ
4
' (oz)
P72 model 3.0 106 Total number of BC
ǩ
3
(kg)
ǩ
3
' (oz) - 27 2.0 71
P96 model
4.5 159
1 1.0 35 28 - 54 2.5 89
P120 model 2 2.0 71 55 - 126 3.0 106
P144 model 6.0 212 127 - 144 3.5 124
P168 model 7.5 265 145 - 180 4.5 159
P192 model
9.0 318
181 - 234 5.0 177
P216 model 235 - 273 6.0 212
P240 model 274 - 307 8.0 283
308 - 342 9.0 318
343 - 411 10.0 353
412 - 12.0 424