Bosch CLIMATE 5000 VRF RDCI Series, Installation Manual

Page: 9 / 36

RDCI Series – All DC Inverter Outdoor Units 6 720 862 437 (
2016/10
)
REFRIGERANT PIPE | 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 Ø15.9 → Ø19.1
Ø19.1 → Ø22.2 Ø22.2 → Ø25.4 Ø25.4 → Ø28.6
Ø28.6 → Ø31.8 Ø31.8 → Ø38.1 Ø38.1 → Ø41.3
Ø41.3 → Ø44.5 Ø44.5 → Ø54.0
5.2 Select the refrigerant pipework type
Conditions
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
Examples
Reference Figure. 5-1
Conditions
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).
Examples
Reference Figure. 5-1
Conditions
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
Examples
Reference Figure. 5-1
L
1
M
L
g1
j j j j j j
g2 g3
G1
N3
(140)
N5
(140)
N6
(71)
N7
(71)
N9
(56)
N8
(28)
N2
(71)
N4
(28)
N1
(71)
N10
(56)
A
B
C
E
F
Ⅱ
Ⅳ
Ⅲ
Ⅰ
b
c
d
f
g
j
h
i
l
N11
(140)
p
N12
(140)
q
N13
(56)
r
k
m n
e
L
2
L
9
L
8
L
7
L
13
L
11
L
10
L
12
L
3
a
SB1
SB2
SB3
SB4
SB5
SB6
L
4
L
5
L
6
D
SB7
W3
(10)
W2
(12)
W1
(16)
Fig. 5-3