Refrigerant Piping - Daikin RN25CXV1 Installation Manual

Allowable Pipe Length and Elevation
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 Indoor (FDMRN/FDMQN)
Outdoor (RN/RYN)
Max. allowable length, m
Max. allowable elevation, m
Liquid pipe size, mm/(in)
Gas pipe size, mm/(in)
Model Indoor (FDMRN/FDMQN)
Outdoor (RR/RQ)
Max. allowable length, m
Max. allowable elevation, m
Liquid pipe size, mm/(in)
Gas pipe size, mm/(in)
NOTE
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 the piping length up to 7.5m.
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REFRIGERANT PIPING

25C 35C
25C 35C
12
5
6.35 6.35
(1/4") (1/4")
9.52 12.70
(3/8") (1/2")
71C
71C 90D
15 45
8 25
9.52 9.52
(3/8") (3/8")
15.88 15.88
(5/8") (5/8")
1-11
50C
50C
12 15
5 8
6.35
(1/4")
12.70
(1/2")
100C 125C
100D 125D
45 45
25 25
9.52 9.52
(3/8") (3/8")
15.88 15.88
(5/8") (5/8")
60C
60C
15
8
6.35
(1/4")
15.88
(5/8")
140C
140D
35
15
9.52
(3/8")
19.05
(3/4")
10/9/12 4:11:10 PM 10/9/12 4:11:10 PM