Mitsubishi Electric Mr.SLIM PLA-RP·BA Technical Data Book page 42

8-2. ADJUSTING THE AMOUNT OF REFRIGERANT
• Check additional refrigerant charging amount referring to table 5, 6 when liquid pipe is one size larger than standard diameter.
<Table 5> Required additional charge when the liquid pipe is one size larger than the standard diameter (1:1 SYSTEM)
Outdoor unit
PUHZ-HRP71-125
<Table 6> Required additional charge when the liquid pipe is one size larger than the standard diameter (TWIN SYSTEM)
Outdoor unit When the extension pipe length (main piping + branch piping) exceed 20 m
PUHZ-HRP71-125
Additional refrigerant amount
If the calculation produces a negative number ( W
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
1 : 1
PUHZ-HRP71-125
system
Type Outdoor unit
Twin
PUHZ-HRP71-125
system
Refrigerant amount to be added (Exceeding 20m)
Liquid pipe O.D.
12.7
W(g) = (100
0), additional charging is not necessary.
Permitted Amount of unit
pipe length
filling refrigerant (kg)
75m or less 5.5kg
Permitted Amount of unit
pipe length
filling refrigerant (kg)
75m or less 5.5kg
100 g per 1 m
L1) + (60 L2) + (30 L3) - 2000
Additional refrigerant charging amount
for pipe length exceeding 30 m (kg)
31 – 40m 41 – 50m
0.6kg 1.2kg
Additional refrigerant charging amount
for pipe length exceeding 30 m (kg)
31 – 40m 41 – 50m
0.6kg 1.2kg
42
51 – 60m 61 – 70m 71 – 75m
1.8kg 2.4kg
51 – 60m 61 – 70m 71 – 75m
1.8kg 2.4kg