22
■
Schematic diagram of the allowable length and height difference for refrigerant piping
Figure 14-1
a
N1
3
N
5
N
6
N
2
N
4
N
b
c
e
f
d
A
B
C
D
E
Maximum height difference between ODU and IDU is ≤ 30
m
Maximum height difference between IDUs is ≤ 10
m
Maximum piping length from the first branch joint
to the farthest IDU is ≤ 20 m
Maximum equivalent piping length from the ODU to
the farthest IDU is ≤ 50 m
First branch
joint
ODU
+
۪
L1
L2
L3
L4
L5
17.5mm
14.1.4 Allowable Length and Height Difference for Refrigerant Piping
Table 14-2
Permitted value
Piping
Piping
Length
Length of refrigerant pipe (actual)
≤ 60 m (8 kW)
≤ 80 m (10/12 kW)
≤ 100 m (14/16 kW)
L1+L2+L3+L4+L5+a+b+c+d+e+f
Piping length between the
ODU and the farthest IDU
Actual length
≤ 35 m (8/10/12 kW)
≤ 45 m (14/16 kW)
L1+L2+ max (a,b) or
L1+L3+L4+max (c,d) or
L1+L3+L5+max (e,f)
Equivalent
length
≤ 40 m (8/10/12 kW)
≤ 50 m (14/16 kW)
Piping length between the first branch and
the furthest IDU
≤ 20 m
L2 + max (a, b, c, d) or L3 + Max
(e, f, g, h, i)
Piping length between branch joint and
hydraulic module or DHW kit
≤ 5 m
a
Height
difference
ODU to IDU
ODU is above
≤ 10 m (8 kW)
≤ 20 m (10/12 kW)
≤ 30 m (14/16 kW)
ODU is below
≤ 10 m (8/10/12 kW)
≤ 20 m (14/16 kW)
IDU to IDU
≤ 10 m
Содержание KMF-80 DVR5
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