Mitsubishi Electric PEFY-P-VML-E Data Book page 132

2 PURY
(1) Refrigerant charge
The following amount of refrigerant is being charged into the outdoor unit at factory shipment. As the amount does
not include that for extended piping, charge it additionally in the filed.
Outdoor unit
10.5kg
Refrigerant charge
Outdoor unit
22.0kg
Refrigerant charge
(2) Formula to obtain an amount of additional refrigerant charge
The calculation of additional refrigerant charge is based on the size and length of extended high pressure side piping.
Additional amount (kg) = (0.36 ✕ L
Where L :
0
L :
1
L :
2
L :
3
L :
4
L :
5
L :
6
Total capacity of indoor units connected
Note: Raise a fraction of the calculation result less than 0.01kg to a unit. (Examples : 10.52 © 10.6kg)
Example: PURY-P350
This calculation concerns only the liquid (high press) pipes.
ø19.05 : 40m
ø9.52 : 10m + 15m = 25m
ø6.35 : 15m
Total capacity of indoor units connected:
Calculation of additional amount :
Additional amount (kg) = (0.16 ✕ 40) + (0.06 ✕ 30) + (0.024 ✕ 15) + 2 = 10.56 kg
The result of 10.56 kg is rounded up to one decimal place (0.1kg). Therefore,
Additional amount = 10.6 kg
P200 P250 P300
13.0kg 13.0kg
P600 P650
22.0kg
) + (0.23 ✕ L
0
+ (0.024 ✕ L
) + A + B
6
Length of high pressure pipe ø28.58 (m)
Length of high pressure pipe ø22.2 (m)
Length of high pressure pipe ø19.05 (m)
Length of high pressure pipe ø15.88 (m)
Length of liquid pipe ø12.7 (m)
Length of liquid pipe ø9.52 (m)
Length of liquid pipe ø6.35 (m)
~ 160
161 ~ 330
331 ~ 480
481 ~ 630
631 ~ 710
711 ~ 890
891 ~
ø19.05 (40m)
ø6.35 (15m)
ø9.52 (10m)
Type 32 Type 63
32 + 63 + 63 + 63 = 221
P350 P400
13.0kg 13.0kg
) + (0.16 ✕ L ) + (0.11 ✕ L
1 2 3
A: Additional refrigerant charge by total
capacity of indoor units connected.
B: Additional refrigerant charge for BC
controller. (Slave)
Additional refrigerant charge (A)
A
1.5
2.0
2.5
One unit ...
3.0
Two units ...
4.0
5.0
6.0
BC controller
ø9.52 (15m)
ø9.52 (5m)
Type 63
2- 11
P450 P500 P550
16.5kg 22.0kg 22.0kg
) + (0.012 ✕ L ) + (0.06 ✕ L
4 5
B
1.0
2.0
Type 63
)