11
Indoor Unit
Outdoor Unit
(Fixation Methods Example)
3) Refrigerant piping fixation methods:
Connect the indoor unit and the outdoor unit with field-supplied refrigerant piping. Suspend the refrigerant piping at certain points and
prevent the refrigerant piping from touching the weak part of the building such as wall, ceiling, etc.(If touched, abnormal sound may
occur due to the vibration of the piping. Pay special attention in case of short piping length.)
Piping fixation Interval
Pipe Size
20Less
25~40
Maximum Interval
1.0m
1.5m
4) Refrigerant piping limitation and multi-kit pipe:
Because the longer pipe, can cause air conditioner cooling and heating reduced capacity, so this factor to be considered for selected
piping specifications.
Piping Connection Example
：
These figures show examples of 4 indoor
units combined with one outdoor unit.
The refrigerant pipes are shown as single line
in the diagrams.
However, liquid line piping and gas line piping
are required in the field piping work.
Maximum
Piping Length
Actual Length
L
1
＋
L
2
＋
l
3
：
100m Below
Equivalent Length
L
1
＋
L
2
＋
l
3
：
120m Below
The Total Length
L
1
＋
L
2
＋
l
0
＋
l
1
＋
l
2
＋
l
3
：
250m Below
Maximum Lift
between
Outdoor Unit
and Indoor
Unit
The outdoor unit is higher than
that of indoor unit.
H
1
：
40m Below
The outdoor unit is lower than
that of indoor unit.
H
1
：
30m Below
Between each indoor unit
H
2
：
15m Below
Maximum
Piping Length
Between Each Multi-kit And Each
Indoor Unit
l
0
、
l
1
、
l
2
、
l
3
：
15m Below
Between Multi-kit "a" And the
Farthest Indoor Unit
l
4
：
40m Below
Multi-kit And
Connection
Pipe
The First Multi-kit Pipe (a)
And L1 Connection Pipe
Outdoor Unit Model
Gas/Liquid Pipe Size
(
Φ mm)
Multi-Kit Pipe Type
RAM-200FPS(D)
25.4/9.53
※
1
E-NP452S
RAM-250FPS(D)
25.4/12.7
RAM-270FPS(D)
28.6/12.7
Others Multi-kit Pipe
And Connection Pipe
Indoor
Unit
Total
Capacity (kW)
Gas/Liquid Pipe Size
(
Φ mm)
Multi-Kit Pipe Type
27
28.6/12.7
E-NP452S
23~26.99
25.4/9.53
15~22.99
22.2/9.53
E-NP282S
E-N55HT
※
2
15
19.05/9.53
※
1: RAM-200FPS(D) piping length (L
1
＋
l
4
) exceed above 70m, the liquid pipe size from
Φ
9.53
change to
Φ
12.7
。
※
2: E-N55HT (Header Branch), It can be used that each indoor unit distribution and connection.
Indoor
Indoor
Indoor
Indoor
NO.0
NO.1
NO.2
NO.3
Outdoor
