Mitsubishi Electric CITY MULTI PUHY-P400YEM-A Service Handbook page 121

Example PUHY-P600YSEM-A
ø12.7 ø15.88
(3 m) (1 m)
ø19.05
(30 m)
Each distribution pipe carries liquid.
ø19.05: 30 m
ø15.88: 1 m + 10 m
ø12.7 : 3 m + 10 m + 20 m + 10 m
ø9.52 : 10 m + 10 m + 20 m + 10 m + 10 m + 10 m = 70 m
ø6.35 : 10 m
From the formula above we find that:
Add. Refrigerant volume = (0.29 × 30) + (0.25 × 11) + (0.12 × 43) + (0.06 × 70) + (0.024 × 10) + 3 = 24.05 kg
The result of this calculation is 24.05 kg, however round to the nearest 0.1 kg:
Add. Refrigerant volume = 24.1 kg.
The total refrigerant level (including the outdoor unit refrigerant charge and the additional volume in the extension pipes)
is over 73 kg, please make the total refrigerant amount = 73 kg.
Original refrigerant amount in the outdoor unit + additional refrigerant amount
Example for PUHY-P600YSEM-A
PUHY-P400YEM-A
16 kg
Caution: (R407C)
When charging with refrigerant, be sure to charge from the liquid side. If charging from the gas side, it will cause
the refrigerant composition to change inside the unit and the composition of the refrigerant remaining in the
canister will also change.
ø15.88
(10 m)
ø12.7 (20 m)
ø12.7
(10 m)
ø9.52 ø9.52
(10 m) (10 m)
Model
32
Model Model
80 125
PUHN-P200YEM-A Additional refrigerant volume
+ 6.5 kg +
ø12.7 (10 m)
ø9.52
ø6.35
(20 m)
(10 m)
Model Model
125
= 30 m
= 11 m
= 43 m
=10 m
51 kg = 73.5 kg
→ Fix to 73 kg
(Set the additional refrigerant volume to 50.5 kg.)
-118-
ø9.52
ø9.52
(10 m)
(10 m)
Model
80 63
73 kg
ø9.52
(10 m)
Model
71