Mitsubishi Electric PURY-P72 Service Handbook page 168

[VIII Test Run Mode]
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.
Outdoor unit model P72 P96 P120
Amount of pre-charged refrigerant
10.5 11.8 11.8
in the outdoor unit (kg)
Amount of pre-charged refrigerant
23-2 26-1 26-1
in the outdoor unit [Ibs-oz]
(1) Calculation formula
The amount of refrigerant to be added depends on the size and the length offield piping. (unit in m[tt))
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
s )
+
(0.12 x
y,)
+
(0.06 x L
7 ) +
(0.024 x L
8 ) +
a
1+
a3
+
a4
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
s ' )
+
(1.30 x
y,')
+
(0.65
X
L
7 ') +
(0.26
X
L
8 ') +
a
l' +
cx3'
+
cx4'
L
1 :
Length of 028.58[1-1/8"] high pressure pipe (m)
L
2 :
Length of
022.2[7/8"]
high pressure pipe (m)
L
3 :
Length of 019.05[3/4"] high pressure pipe (m)
L
4 :
Length of 015.88[5/8"] high pressure pipeS (m)
L
5 :
Length of 015.88[5/8"] liquid pipe (m)
y, :
Length of 012.7[112"] liquid pipe (m)
L 7 : Length of
09.52[3/8"]
liquid pipe (m)
L
8 :
Length of 06.35[1/4"] liquid pipe (m)
a1,cx3,a4' a1" a3" cx4':
Refer to the table below.
L
1 ' :
Length of
028.58[1-1/8"]
high pressure pipe
[ttl
L
2 ' :
Length of
022.2[7/8"]
high pressure pipe
[tt]
L
3 ' :
Length of 019.05[3/4"] high pressure pipe [tt]
L
4 ' :
Length of 015.88[5/8"] high pressure pipe [tt]
L
5 ' :
Length of 015.88[5/8"] liquid pipe [tt]
y,' :
Length of 012.7[112"] liquid pipe [tt]
L
7 ' :
Length of
09.52[3/8"]
liquid pipe
[tt]
L
8 ' :
Length of
06.35[1/4"]
liquid pipe
[ttl
Amount for the BC
Outdoor unit total
controllers (main/sub)
index
a
1
(kg)
CX 1
'(oz)
P72
model
3.0 106
P96 model
4.5 159
P120 model
P144
model
6.0 212
P168 model 7.5 265
P192
model
P216
model
9.0 318
P240 model
BC controller (sub)
Total number of Be CX3(kg)
CX3'
(oz)
1 1.0 35
2 2.0 71
Total capacity of
Amount for the Indoor
connected indoor
unit
units
fX 4 (kg)
a
4 '(OZ)
-
27 2.0
71
28
-
54 2.5
89
55
-
126
3.0 106
127
-
144 3.5
124
145
-
180 4.5
159
181
-
234 5.0
177
235
-
273 6.0
212
274
-
307 8.0
283
308
-
342 9.0
318
343
-
411
10.0 353
412
-
12.0 424
Round up the calculation result to the nearest 0.1 kg. (Example: 18.04kg to 18.1 kg)
Round up the calculation result in increments of 40z (0.1kg) or round it up to the nearest 1oz. (Example: 78.210z to 790z)
HWE0803A -158 -
GB