Installation Clearance; Refrigerant Piping - Daikin R22 Installation Manual

• Outdoor units must be installed such that there is no short circuit of the hot discharge air or obstruction to smooth air Á ow. Select
the coolest possible place where intake air should not be hotter than the outside temperature (refer to operating range).
A
Air
Inlet
All Model
Minimum Distance (mm)
Maximum Pipe Length
When the pipe length becomes too long, both the capacity and reliability drop. As the number of bends increases, system
piping resistance to the refrigerant Á ow increases, thus lowering the cooling capacity. As a result, compressor reliability will
be affected. Always choose the shortest path and follow the recommendation as tabulated below:
Model Indoor
Outdoor
Max. allowable length, m
Max. allowable elevation, m
Liquid pipe size, mm/(in)
Gas pipe size, mm/(in)
Remark : For FDM60JEV1K cooling unit, recommended to add 6 kg external accumulator

INSTALLATION CLEARANCE

B
Air
Discharge
A
300

REFRIGERANT PIPING

FDM20JEV1K FDM25JEV1K FDM30JEV1K FDM40JEV1K FDM40JEV1K FDM50JEV1K FDM60JEV1K
RD20JEV1K RD25JEV1K RD30JEV1K
40 40
20 20
6.35 9.52
(1/4") (3/8")
15.88 15.88
(5/8") (5/8")
C
Air
Inlet
B
1000
RD40JEV1K RD40JEY1K
50 50 50
30 30 30
9.52 9.52 9.52
(3/8") (3/8") (3/8")
15.88 19.05 19.05
(5/8") (3/4") (3/4")
D
Service
Space
C D
300 500
RD50JEY1K RD60JEY1K
45 35
25 15
9.52 12.70
(3/8") (1/2")
19.05 19.05
(3/4") (3/4")