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Mitsubishi Electric PLA-RP-BA Technical Data Manual Page 84

Mitsubishi electric split-type, heat pump air conditioners.
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8-1-2. ADJUSTING THE AMOUNT OF REFRIGERANT
• Check additional refrigerant charging amount referring to table 5, 6 when liquid pipe is 1 size larger than standard diameter.
<Table 5> Required additional charge when the pipe size is 1 size larger than the standard diameter (1:1 SYSTEM)
Outdoor unit
PUHZ-RP35,50
PUHZ-RP60,71
PUHZ-RP100~140
<Table 6> Required additional charge when the pipe size is 1 size larger than the standard diameter (TWIN/TRIPLE SYSTEM)
Outdoor unit
When the extension pipe length (main piping + branch piping) exceeds 20 m
PUHZ-RP71~140
Additional refrigerant amount
If the calculation produces a negative number ( W [ 0), additional charging is not necessary.
[
L1:
12.7 liquid pipe length (m)
[
L2:
9.52 liquid pipe length (m)
[
L3:
6.35 liquid pipe length (m)
<Table 7> Additional refrigerant charging amount for pipe of standard diameter
Type
Outdoor unit
PUHZ-RP35,50
1 : 1
PUHZ-RP71
system
PUHZ-RP100~140
Type
Outdoor unit
Twin Triple
PUHZ-RP71
system
PUHZ-RP100~140
Liquid pipe O.D.
[9.52
[12.7
[12.7
W(g) = (100 o L1) + (60 o L2) + (30 o L3) - 2000
Permitted
Amount of unit
pipe length
filling refrigerant (kg)
2.5kg
50m or less
3.5kg
75m or less
5.0kg
Permitted
Amount of unit
pipe length
filling refrigerant (kg)
50m or less
3.5kg
75m or less
5.0kg
Refrigerant amount to be added
60 g per 1 m
100 g per 1 m
100 g per 1 m
Additional refrigerant charging amount
for pipe length exceeding 30 m (kg)
31 – 40m
41 – 50m
0.2kg
0.4kg
0.6kg
1.2kg
0.6kg
1.2kg
Additional refrigerant charging amount
for pipe length exceeding 30 m (kg)
31 – 40m
41 – 50m
0.6kg
1.2kg
0.6kg
1.2kg
84
51 – 60m
61 – 70m
71 – 75m
1.8kg
2.4kg
51 – 60m
61– 70m
71 – 75m
1.8kg
2.4kg

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