Connecting the refrigerant pipe
E-
15
ENGLISH
L1
H2
H1
L2
L0
Refrigerant Piping System (i.e. 2 indoor units)
❋
You had better make piping length from the refnet joint to indoor unit equal with the other ( L1=L2 ).
❋
It is recommended there is no height difference between indoor units.
Refnet joint
R
H
Outdoor Unit
Oil trap
(gas pipe:
must be
installed every
10m)
Indoor unit
Refnet joint
Install the oil trap
◆
Install the oil trap in case that the outdoor unit is situated higher than the
indoor unit.
◆
Install the oil trap only in the gas pipe for cooling operation.
◆
Install the oil trap only between the outdoor unit and the first refnet joint.
In this case, it must be installed every 10m from the outdoor unit.
◆
The radius of curvature(R) is as followings.
◆
The height of the oil trap(H) : 4R
≤
H
≤
6R
The diameter of
the gas pipe(D)
The radius of
curvature(R)
25
or more
32
or more
12.70
(Unit : mm)
15.88
38
or more
19.05
41
or more
22.23
51
or more
25.40
57
or more
28.60
60
or more
31.75
Refrigerant piping system table
Max. allowable
length
Actual pipe
length
L0+L1(L1
≥
L2) or L0+L2(L1
≤
L2)
Allowable
height length
Actual pipe
length
Between outdoor unit and indoor unit (H1)
Between indoor units (H2)
Max. difference
in length after
branching
Difference in
length
I L1 - L2 I
30m or less
15m or less
0.5m or less
6m or less
Pipe length or height
UH052EAMT
UH070EAMT
