Piping Length Limitations; How To Obtain The Cooling And Heating Capacity - Mitsubishi Heavy Industries FDTC50ZHXV Technical Manual

When the outdoor unit is located below indoor units in cooling mode, or when the outdoor unit is located above indoor units in
(5)
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 (*mark), maximum one way length is limited to 30m.

How to obtain the cooling and heating capacity

Example : The net cooling capacity of the model FDUM100VNV 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 ˚C and outdoor dry-bulb temperature 35 ˚C is
Net cooling capacity =
Model
10.0 × 1.00
FDUM100VNV Air flow
"High"
5m 10m
0.01 0.02
40~60 71, 100, 125, 140
40m
Outdoor unit is higher 30m
× (0.978 - 0.01)
(1)
Length 15m.(Gas pipe size is φ15.88)
Height difference 5m
129
- -
15m 20m 25m
0.03 0.04 0.05
200, 250
50m
Outdoor unit is lower 15m
. = .
× 1.12 10.8 kW
Factor by air
temperatures
(value at the max. capacity)
30m
0.06
70m*