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Mitsubishi Electric PFAV-P250VM-E Service Manual page 121

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[ IX 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
Amount of pre-charged refrigerant in
the outdoor unit (kg)
Amount of pre-charged refrigerant in
the outdoor unit [lbs-oz]
(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) = (0.29x L
Amount of added refrigerant (oz) = (3.12x L
L
: Length of ø19.05 [3/4"] liquid pipe (m)
1
L
: Length of ø15.88 [5/8"] liquid pipe (m)
2
L
: Length of ø12.7 [1/2"] liquid pipe (m)
3
L
: Length of ø9.52 [3/8"] liquid pipe (m)
4
L
: Length of ø6.35 [1/4"] liquid pipe (m)
5
α, α' : Refer to the table below.
Total capacity of
connected indoor units
P250, P300-F
P500, P600-F
P750, P900-F
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: 178.21oz to 179oz)
HWE10190
P250
8.0
17-10
) + (0.2 x L
1
' ) +(2.15 x L
1
L
' : Length of ø19.05 [3/4"] liquid pipe [ft]
1
L
' : Length of ø15.88 [5/8"] liquid pipe [ft]
2
L
' : Length of ø12.7 [1/2"] liquid pipe [ft]
3
L
' : Length of ø9.52 [3/8"] liquid pipe [ft]
4
L
' : Length of ø6.35 [1/4"] liquid pipe[ft]
5
α(kg)
α'(oz)
3.0
106
5.0
177
8.0
283
- 112 -
P350
P400
11.5
11.5
25-6
25-6
) + (0.12 x L
) + (0.06 x L
2
3
' ) + (1.29 x L
' ) + (0.65 x L
2
3
) + (0.024 x L
) +α
4
5
' ) + (0.26 x L
' ) + α'
4
5
GB
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