Item
Mark
Allowable
Piping
Length
Piping
Length
Maximum Piping Length between
BRANCH PIPE
of 1st
Branch and Terminal Indoor Unit
L2
≤
90m
(295
ft)
1
Maximum Piping Length between Each
BRANCH
PIPE
and Each Indoor Unit
L3
≤
40m
(131
ft)
2
In Case there is Branch after
Switch Box
,
Total Piping Length from
Switch Box
to
Each Connected Indoor Unit per Branch
a+b+c+d+e
≤
40m
(131
ft)
Height
Difference
In Case there is Branch after
Switch Box
,
Height Difference between Indoor Units Connected
to Same Connection Port of
Switch Box
H3
<
4m
(13
ft)
Height Difference between
Switch Boxes
H4
<
15m
(49
ft)
Height Difference between
Switch Box
and Indoor Unit
H5
Refer
to
NOTE
3.
㹟
㹡
㹠
L3
L3
L2
H4
H3
d
e
Outdoor Unit
BRANCH PIPE
Indoor Unit
Switch Box
: 3 Pipes (High/Low Pressure Gas Pipe, Low Pressure Gas Pipe and Liquid Pipe)
: 2 Pipes (Gas Pipe and Liquid Pipe)
H5
H5
H5
Switch Box
Switch Box
●
Piping Work for
Switch Box
Refrigerant piping size depends on the combinations with the outdoor unit. Refer to the installation and
maintenance manual for the outdoor unit. Perform piping work for the
Switch Box
according to the
following figure.
NOTES:
1.
When the piping length from the first branch to the terminal indoor unit exceeds 40m
(131 ft), there are
restrictions. Refer to the installation and maintenance manual for the outdoor unit.
2.
If the piping length (L3) between each
BRANCH PIPE
and indoor unit is considerably longer than other indoor
unit,
refrigerant
may
not
flo
w
well,
and
may
lessen
the
unit’s
performance
compared
to
other
models. (Recommended
Piping
Length:
Within
15m
(49
ft))
3.
Recommended height difference between
Switch Box
and indoor unit is within 15m (49 ft).
If
the
height
difference
exceed
this
value,
it
may
cause
a
decrease
of
operating
performance.
12
or Water Module
4. Each Water Module must
occupy one
branch
of Switch Box exclusively
.
Indoor Unit
or Water Module
Indoor Unit
Indoor Unit
Indoor Unit