Bosch MDCI8-1 Installation Manual page 6

6 | INSTALLING THE CONNECTIVE PIPEWORK
4.5 Confirmation for the diameters of outdoor unit
connecting pipes
Table 4-4 R410A outdoor unit connecting pipes diameters
Total capactiy Main pipe size when the total
of the equivalent pipework length of liquid
outdoor units + gas side is <90 m
gas liquid
The first Line
side side
Branch Pipe
(inches) (inches)
A<160 Ø15.9 Ø9.5 IDU - 01
Ø19.1 Ø9.5
160≤A<230 IDU - 01
NOTE
• When installing branch joints ensure there is at least 0.5 m of straight
pipe before and after the branch joint;
• The straight distance between branchpipes must be at least 0.5 m;
• The straight distance where the branch pipes connect to the indoor
unit must be at least 0.5 m;
• Branch header must be connected with the indoor units directly,
further branch connections are not allowed.
•
Select branch joint
•
Select the branch joint required by the total designed capacity of the
indoor units which it connects to. If this capacity is more than that of
the outdoor unit, then select the connection according to the outdoor
unit.
• The selection of branch header depends on the quantity of branches
it connects to.
Connection method
■
Table 4-5
Gas side
8kW Flaring
10.5kW Flaring
12kW Flaring
14kW Flaring
16kW Flaring
18kW Flaring
Indoor unit Flaring
Branch pipe Brazing or Flaring
Pipework sizes at the branch pipe
■
Table 4-6
Refrigerant Indoor Unit
Capacity
A(x100W)
R410A A≤45 12.7(Flaring nut)
A≥56 15.9(Flaring nut)
6 720 874 421 (2017/04) ZA
Main pipe size when the total
equivalent pipework length of liquid
+ gas side is ≥90 m
gas liquid
The first Line
side side
Branch Pipe
(inches) (inches)
Ø19.1 Ø9.5 IDU - 01
Ø22.2 Ø9.5
IDU - 02
Liquid side
Flaring
Flaring
Flaring
Flaring
Flaring
Flaring
Flaring
Brazing or Flaring
Gas Side (Ø) Liquid Side (Ø)
6.4(Flaring nut)
9.5(Flaring nut)
Pipe diameter of the connections onto the outdoor unit.
■
Table 4-7
Pipework Pipe diameter of outdoor
side unit's connections (inches)
Gas Side
MODEL
(kW)
8
10.5
12
14
16
18
Table 4-8
Outdoor Unit Capacity of
(kW) Outdoor unit
(horse power)
8 2.5
10.5 3
12 4
14 5
16 6
18 6.5
When connecting more than one indoor unit, the largest capacity connected
should be less than 8KW.
When the total capacity of the indoor units is greater than 100% of the
outdoor units capacity, ensure you turn the indoor units on one by one one.
Too many at once will cause damage to the compressor.
When the total capacity of the indoor units is greater than or equal to
16.8 kW, the size of primary gas pipe should be enlarged from Ø16 to Ø19.
Table 4-9
Capacity Capacity
ranking (horsepower)
18 0.6
22 0.8
28 1
36 1.25
45 1.7
56 2
When the outdoor unit connects to one indoor unit
■
Table 4-10
MODEL The max height drop (m)
(kW)
When out- When
door outdoor unit is
unit is top bottom
8 25 20
10.5 25 20
12 25 20
14 25 20
16 25 20
18 25 20
Liquid Side
Ø15.9 Ø9.5
Ø15.9 Ø9.5
Ø15.9 Ø9.5
Ø15.9 Ø9.5
Ø19.1 Ø9.5
Ø19.1 Ø9.5
Maximum Sum Capacity of
Quantity of Indoor unit (horse-
Indoor units power)
4 45%~130%
5 45%~130%
6 45%~130%
6 45%~130%
7 45%~130%
9 45%~130%
Capacity Capacity
ranking (horsepower)
80 2.5
10.5 3
120 4
140 5
160 6
The length of
The number
refrigerant pipe
of bends
(m)
50
50
50
less than 10
50
50
50
Mini VRF Heat Pump Outdoor Unit