Height Difference Between The Indoor Unit And Outdoor Unit; Piping Length Limitations; How To Obtain The Cooling And Heating Capacity - Mitsubishi Electric FDF71VNXVD Technical Manual

8.4 Height difference between the indoor unit and outdoor unit

When the outdoor unit is located below indoor units in cooling mode, or when the outdoor unit is located above indoor units in
heating mode, the correction coefficient mentioned in the below table should be subtracted from the value in the above table.
Height difference between the indoor unit and
outdoor unit in the vertical height difference
Adjustment coefficient

Piping length limitations

Item
Max. one way piping length
Max. vertical height difference
Notes (1) Values in the table indicate the one way piping length between the indoor and outdoor units.
(2) When φ22.22 gas pipe is applied to 200 and 250, maximum one way length is limited to 35m.

How to obtain the cooling and heating capacity

Example : The net cooling capacity of the model FDF100VNVD with the air flow "High", the piping length of 15m, the outdoor unit
located 5m lower than the indoor unit, indoor wet-bulb temperature at 19.0℃ and outdoor dry-bulb temperature 35℃ is
Net cooling capacity =
Net cooling total capacity
of FDF100VNVD
(Outdoor temp. : 35℃DB
Indoor temp. : 19℃WB)
shown in table 8.1
Model
71VNX
100, 125, 140VN/VS
50m
10.0 × 1.00 ×
Air flow : High
shown in table 8.2
Piping length :15m
(Gas pipe size is φ15.88)
shown in table 8.3
55
-
5m 10m 15m
0.99 0.98 0.97
100, 125, 140VNX/VSX
100m
Outdoor unit is higher 30m
Outdoor unit is lower 15m
. =. 9.7kW
0.978 × 0.99
Height diff. :5m
(Outdoor unit : below)
shown in table 8.4
-
'11 • PAC-T-160
20m 25m 30m
0.96 0.95 0.94
200, 250
70m or 35m (2)