43
Λ
Outdoor unit
a
bcd
e
h
Distributor kit
g
i
j
f
H1
H2
8-4. Requirement when piping is installed using simultaneously both refnet
joint and contributor kit
(during six rooms installation)
Max.
allowable
length
Distance of the
remotest indoor unit
from the outdoor unit
Actual length
(m)
Equivalent
length (m)
✻
1)
Max.
allowable
height
difference
Height difference between outdoor unit
and indoor unit (m) = H1(the figures in the
parenthesis is applied when the outdoor
unit is installed below the indoor unit)
Height difference between indoor unit = H2
Allowable length after branching
The distance from the first refnet joint to the indoor unit :
ex) b+c+d+j ≤ 30m, b+c+d+h ≤ 30m
Between distributor kit and indoor unit ≤ 30m
ex) In case of 10 horse power a+b+c+d+j ≤ 100m
ex) In case of 10 horse power ≤ 125m
15m
70
87
30 (30)
100
125
50 (40)
6.0HP5.0HP 7.0/7.5HP 8.0/10.0HP
✻ 1) Equivalent length means a calculated value of the actual length plus pressure loss caused by piping curve.
For instance, the equivalent in the case of 10 horse power should be 125 meters (The detailed calculation
of equivalent length should be referenced in pages V-43).
◆ The distributor kit is applicable to indoor units that are not embedded with electronic expansion
valve, that is, 1-way cassette or Wall-mounted type, and it has less coolant noise compared to
the electronic expansion valve kit of embedded type. Therefore we recommend the product to
be used in study rooms or private offices where noise control is required.
NN
NN
oo
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tt
tt
ee
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Item
Outdoor unit
DVM TM(chapter5-2)_E<03759 6/14/02 2:22 PM Page 43
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