Refrigerant Piping - Daikin J serie Installationshandbuch

Allowable Piping Length
If the pipe is too long, both the capacity and reliability of the unit will drop. As the number of bends increases, resistance to
the fl ow of refrigerant system increases, thus lowering cooling capacity. As a result, the compressor may become defective.
Always choose the shortest path and follow the recommendations as tabulated below:
Model
Min. Allowable Length (L), m
Max. Allowable Length (L), m
Max. Allowable Elevation (E), m
Gas Pipe Size, mm /(in)
Liquid Pipe Size, mm /(in)
Be sure to add the proper amount of additional refrigerant. Failure to do so may result in reduced performance.
*
Remark: The refrigerant pre-charged in the outdoor unit is for piping length up to 7.5m.

REFRIGERANT PIPING

Indoor unit
Outdoor Unit
FTYN25LV1B FTYN35LV1B
12
5
9.52
(3/8")
1-9
L E
FTYN50LV1B
3
15
8
12.70
(1/2")
6.35
(1/4")
FTYN60LV1B
15.88
(5/8")