Mitsubishi Electric PQHY-P120THMU-A, Service Handbook

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[
VIII
Test Run Mode ]
- 180 - HWE09080 GB
4. Amount of refrigerant to be added <PQRY>
The amount of refrigerant that is shown in the table below is factory-charged to theheat source 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)
Heat source unit model P72 P96 P120
Amount of pre-charged refrigerant
in the heat source unit (kg)
5.0 5.0 5.0
Amount of pre-charged refrigerant
in the heat source unit [lbs]
11.0 11.0 11.0
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
2
+
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
2
' +
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 pipe (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
2,
ǩ
3,
ǩ
4
,
ǩ
1
' ,
ǩ
2
' ,
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]
Heat source 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)
1 1.0 35
ǩ
4
(kg)
ǩ
4
' (oz)
P72
3.0 106
2 2.0 71 - 27 2.0 71
P96 28 - 54 2.5 89
P120 55 - 126 3.0 106
P144 127 - 144 3.5 124
P168 145 - 180 4.5 159
P192 181 - 234 5.0 177
P216 235 - 273 6.0 212
P240 274 - 307 8.0 283
308 - 342 9.0 318
343 - 411 10.0 353
412 - 480 12.0 424
481 - 14.0 494