Bosch CLIMATE 5000 VRF RDCI Series Installation Manual page 9

CAUTION
1. The length between the branch pipes should be a minimum of 0.5m.
2. When the outdoor unit is installed above the indoor units and the distance
is greater than 20m, you must install oil return taps every 10m. Refer to
5-2.
3. When the outdoor unit is installed below the internal units and the length
exceeds 40m, the liquid pipe needs to be increased one size.
4. When the outdoor unit is installed below the internal units, the first
branch joint connection should be shorter than 40m. However when
certain conditions are met, the length can increase up to 90m.
Conditions
1. For all pipe sizing and limitations please follow the conditions below.
Conditions
L7+L9+L11+j+k+n≤90m L2～L13
■
Increasing the pipe diameter of the distribution pipe
To increase the pipe size, see below
■
Ø9.5 → Ø12.7 Ø12.7 → Ø15.9
Ø19.1 → Ø22.2 Ø22.2 → Ø25.4
Ø28.6 → Ø31.8 Ø31.8 → Ø38.1
Ø41.3 → Ø44.5 Ø44.5 → Ø54.0
5.2 Select the refrigerant pipework type
W3 W2 W1
(10) (12) (16)
j j j j j
g1 g2 g3
M
G1
r
RDCI Series – All DC Inverter Outdoor Units
Ø15.9 → Ø19.1
Ø25.4 → Ø28.6
Ø38.1 → Ø41.3
j
L
2
A
L
L
1
L
7
D
L L
8 9
E
SB7
q p
N13 N12
(56) (140)
2. When calculating actual length of pipe, follow the example below.
L1+(L2+L3+L4+L5+L6+L7+L8+L9+L10+L11+L12+L13)
x2+a+b+c +d+e+f+g+h+i+j+k+l+m+n<1000m
Reference Figure. 5-1
3. The length from the indoor unit to the nearest branch joint assembly
or SBOX ≤40m;
b, c, d, e, f, h, i, l, m, n, p, q, r ≤40m(Pipe diameter requirements, please
refers to table.5-8).
Reference Figure. 5-1
4. The distance between [the outdoor unit to the furthest indoor unit]
and [the outdoor unit to the nearest indoor unit] is ≤40m.
The furthest indoor unit N10
The nearest indoor unit N11
(L1+L7+L9+L11 +j+k+n)-(L1 +L7+L8+p) <40m
Reference Figure. 5-1
a
Ⅰ
SB1
L
3
L
5
B
C
L
4
L
6
SB3
f
N5
(140)
SB4
L
12
L
10 SB5
g
F
L
13
L
11
SB6
k
Ⅲ
Ⅳ
j
l
N11 N8
(140) (28)
REFRIGERANT PIPE | 9
Conditions
Examples
Conditions
Examples
Conditions
Examples
b
N1
(71)
c
N2
(71)
SB2
e
d
N3
N4
(140)
(28)
N6
(71)
h
N7
Ⅱ
i
(71)
m n
N9
(56) N10
(56)
6 720 862 437 (2016/10)
Fig. 5-3