Mitsubishi Electric PUHY-P200 Service Handbook page 85

3. Amount of additional refrigerant to be charged
At the time of shipping from the factory, the outdoor unit is charged with the amount of refrigerant shown in the
following table, but since no extension piping is included, please carry out additional charging on-site.
Outdoor unit model name
Refrigerant charge volume
Calculation formula:
Calculate the additional refrigerant volume by calculating the size of the extension liquid piping and its length (unit : m)
Additional refrigerant volume (kg) = (0.2 x L
: Length of φ 15.88 liquid pipe (m)
L
1
: Length of φ 12.7 liquid pipe (m)
L
2
: Length of φ 9.52 liquid pipe (m)
L
3
: Length of φ 6.35 liquid pipe (m)
L
4
α : Refer to the right table.
❉ In the calculation results, round up fractions smaller than 0.01kg. (Example: 14.04kg → 14.1kg)
Example: PUHY-P650YGM-A
φ 15.88 (30m)
Each pipe is of liquid piping.
φ 15.88 : 30m
φ 12.7
: 10m
φ 9.52
: 10m + 10m + 20m + 10m + 10m = 60m
φ 6.35
: 10m
From the above calculation formula,
Additional charge volume
14.04kg obtained is converted in a unit of 0.1kg.
Therefore,
Additional charge volume
P200 P250 P300
7.0kg 9.5kg 9.5kg
) + (0.12 x L
1
Total capacity of connected indoor unit
φ 9.52 (10m)
φ 12.7 (10m)
φ 9.52
(10m)
250
= (0.2 x 30) + (0.12 x 10)+ (0.06 x 60) + (0.024 x 10) + 3 = 14.04kg
= 14.1kg
P350 P400 P450
9.5kg 13.0kg 22.0kg
) + (0.06 x L ) + (0.024 x L
2 3
~ 80
81 ~ 160
161 ~ 330
331 ~ 480
481 ~ 630
631 ~ 710
711 ~ 890
891 ~ 1070
φ 9.52 φ 9.52
(20m) (10m)
125 80
- 83 -
P500 P550 P600 P650
22.0kg 22.0kg 22.0kg 22.0kg
) + α
4
α
1.0kg
1.5kg
2.0kg
2.5kg
3.0kg
4.0kg
5.0kg
6.0kg
φ 9.52 φ 6.35
(10m) (10m)
63 20