MCAC-VTSM-2014-10 R410A All DC Inverter Mini VRF
Installation 65
Table 1: Indoor unit branch pipes selection (a~f)
A: Capacity of indoor units (kW)
Four way cassette type 2.2~4.5
Four way cassette type 5.6~8.0
One way cassette type 1.8~4.5
One way cassette type 5.6
Low static pressure 1.8~4.5
Two-way Cassette Type 2.2~4.5
Two-way Cassette Type 5.6~7.1
Ceiling And Floor Type 3.6~4.5
Ceiling And Floor Type 5.6~16.0
Expose And Concealed Floor-standing type
2.2~4.5
Expose And Concealed Floor-standing type
5.6~8.0
Note: The maximum length of the branch pipe should not be longer than 15m.
Table 2: Indoor unit main pipes selection (L1~L5)
Total capacity of
downstream indoor units
(kW)
Table 3: Main pipes selection (L1)
Total capacity of
outdoor units
(kW)
When the equivalent length of all liquid and air
pipes < 90m
When the equivalent length of all liquid and air
pipes ≥ 90m
The first line
branch pipe
The first line
branch pipe
Note: Main pipe L1 can be selected form table 2 and table 3, the larger size should be finally selected.
The straight distance between copper pipe turning and the contiguous branch pipe is at least 0.5m.
The straight distance between the contiguous branch pipes is at least 0.5m.
The straight distance which the branch pipes connected to the indoor unit is at least 0.5m.
Table 4: Outdoor unit pipe connection
Outdoor unit pipe connection (mm)
Maximum Quantity of
Indoor unit
Total Capacity of Indoor unit
If ODU connect only one IDU, the capacity of IDU should be not more than ODU.
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