Mitsubishi Electric PQHY-P72TYHMU-A Service Handbook page 189

[ VIII Test Run Mode ]
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.
Heat source unit model
Amount of pre-charged refrigerant
in the heat source unit (kg)
Amount of pre-charged refrigerant
in the heat source unit [lbs]
(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) = (0.36 x L
Amount of added refrigerant (oz) = (3.88 x L
L : Length of ø28.58[1-1/8"] high pressure pipe (m)
1
L : Length of ø22.2[7/8"] high pressure pipe (m)
2
L : Length of ø19.05[3/4"] high pressure pipe (m)
3
L : Length of ø15.88[5/8"] high pressure pipe (m)
4
L : Length of ø15.88[5/8"] liquid pipe (m)
5
L : Length of ø12.7[1/2"] liquid pipe (m)
6
L : Length of ø9.52[3/8"] liquid pipe (m)
7
L : Length of ø6.35[1/4"] liquid pipe (m)
8
, ' ,
1, 2, 3, 4 1
below.
Amount for the BC
controllers (main/sub)
Heat source unit
total index
(kg)
1
P72
P96
P120
P144
3.0
P168
P192
P216
P240
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)
HWE09080
P72
5.0
11.0
) + (0.23 x L
1
+ (0.12 x L ) + (0.06 x L ) + (0.024 x L
6 7
' ) + (2.48 x L
1
+ (1.30 x L ' ) + (0.65 x L ' ) + (0.26 x L
6 7
' , ' , ' : Refer to the table
2 3 4
BC controller (sub)
1
' (oz)
1
2
106
- 180 -
P96 P120
5.0 5.0
11.0 11.0
) + (0.16 x L ) + (0.11 x L
2 3 4
) + + + +
8 1 2 3
' ) + (1.73 x L ' ) + (1.19 x L
2 3
' ) + ' + ' + ' +
8 1 2 3
L ' : Length of ø28.58[1-1/8"] high pressure pipe [ft]
1
L ' : Length of ø22.2[7/8"] high pressure pipe [ft]
2
L ' : Length of ø19.05[3/4"] high pressure pipe [ft]
3
L ' : Length of ø15.88[5/8"] high pressure pipe [ft]
4
L ' : Length of ø15.88[5/8"] liquid pipe [ft]
5
L ' : Length of ø12.7[1/2"] liquid pipe [ft]
6
L ' : Length of ø9.52[3/8"] liquid pipe [ft]
7
L ' : Length of ø6.35[1/4"] liquid pipe [ft]
8
Total capacity of
connected indoor
1.0 35
2.0 71
28
55
127
145
181
235
274
308
343
412
481
)+ (0.2 x L )
5
4
' )+ (2.16 x L ' )
4 5
'
4
Amount for the Indoor
unit
units
(kg) ' (oz)
4 4
- 27 2.0 71
- 54 2.5 89
- 126 3.0 106
- 144 3.5 124
- 180 4.5 159
- 234 5.0 177
- 273 6.0 212
- 307 8.0 283
- 342 9.0 318
- 411 10.0 353
- 480 12.0 424
- 14.0 494
GB