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PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
32
Pipe Connection Method between outdoor unit/indoor unit
Indoor
Unit
h 30 m
C See Table 2
A : Refrigerant pipe diameter from outdoor unit to first branch
E : Refrigerant pipe diameter for outdoor unit capacity (Slave 1+ Slave 2+ Slave 3)
F : Refrigerant pipe diameter for outdoor unit capacity (Slave 2+ Slave 3)
G : Refrigerant pipe diameter for outdoor unit capacity(Slave 3)
Level Difference (Outdoor unit £ Outdoor unit)
Max length from first branch to each outdoor
unit (L1, L2, L3)
(Table 1) Limit Pipe length
Outdoor Unit
Max pipe
£
length
Indoor Unit
Outdoor Unit
Max
£ Indoor Unit
difference
Indoor Unit
in height
£ Indoor Unit
Longest pipe
length after
1st branch
C * : See Table 4
Slave1
Master
H1
L2
L3
E
F
L1
1st branch
Refrigerant pipe diameter from outdoor unit to first branch
l 40 m
Y branch
Method
Longest pipe
A+B+C+D+e≤165 m
length(L)
Equivalent pipe
190 m
length
Total pipe
1,000 m
length
Difference in
90 m
height(H)
Difference in
30 m
height(h)
Pipe length(l)
(90 m: Conditional
application)*
Slave2
Slave3
G
5 m
Less than 10 m
(equivalent length of piping 13 m)
Combination of Y
branch/header
Method
A+B+b≤165 m
A+C+e≤165 m
190 m
1,000 m
90 m
30 m
40 m
40 m
(90 m: Conditional
application)*
Header
Method
A+f≤165 m
190 m
1,000 m
90 m
30 m
40 m
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