Daikin VRV IV Series Installation Manual - Page 10
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- 1. Safety Considerations
- 2. Codes and Regulations
- 3. Table of Contents
- 4. Before Installation
- 5. Selecting Installation Site
- 6. Preparations before Installation
- 7. Branch Selector Unit Installation
- 8. Refrigerant Piping Work
- 9. Electric Wiring Work
- 10. Initial Setting
- 11. Adding an Additional Charge of Refrigerant
- 12. Check Operation and Test Operation
Example of connection 1: When 1 indoor unit is connected downstream from the Branch Selector unit
To refrigerant branch
kit or outdoor unit
Example of connection 2: When there is a branch downstream from the Branch Selector unit
To refrigerant branch
kit or outdoor unit
Table 3 Indoor unit total capacity and pipe size
Total capacity index of
indoor units (x)
f5/8
x < 54
f3/4
54 ≤ x < 72
f7/8
72 ≤ x ≤ 96
Table 4 Indoor unit connection pipe size
Capacity type of indoor
units
07, 09, 12, 18
24, 30, 36, 42, 48, 54
72
96
* The Branch Selector unit downstream connection pipe sizes are shown below. If the pipe diameter differs
from that of the indoor unit connection pipe size selected from Table 4, follow the instructions in "5-5
Piping connection" and use the included pipe to make the connection.
Table 5 Branch Selector unit connection pipe size
Branch Selector unit
BSQ36TVJ
BSQ60TVJ
BSQ96TVJ
7
Determine using Table 3 based
on the total capacity of the indoor
units connected downstream.
<Upstream>
Suction gas pipe
High/low pressure
gas pipe
Liquid pipe
Determine using Table 3 based
on the total capacity of the indoor
units connected downstream.
<Upstream>
<Downstream>
Suction gas pipe
Branch
Gas pipe
Selector
High/low pressure
unit
gas pipe
Liquid pipe
Liquid pipe
Upstream
Suction
High/low pressure
in.
mm
in.
f15.9
f1/2
f19.1
f5/8
f22.2
f3/4
Gas pipe
in.
f1/2
f5/8
f3/4
f7/8
Gas pipe
in.
f5/8
f7/8
Select from Table 4 depending
on the capacity type of the
indoor unit.
<Downstream>
*
Branch
Gas pipe
Selector
unit
Liquid pipe
For information on selecting the size of piping between
the refrigerant branch kits and between a refrigerant
branch kit and the indoor unit, refer to the installation
manual that came with the outdoor unit or Engineering
Data Book.
Indoor unit
Pipe size (Outside diameter)
Liquid
mm
in.
mm
f12.7
f15.9
f3/8
f9.5
f19.1
Pipe size (Outside diameter)
mm
f12.7
f1/4
f15.9
f19.1
f3/8
f22.2
Pipe size (Outer diameter)
mm
f15.9
f3/8
f22.2
Indoor unit
Refrigerant branch kit
Indoor unit
Indoor unit
Downstream
Gas pipe
Liquid pipe
in.
mm
in.
f5/8
f15.9
f3/4
f19.1
f3/8
f7/8
f22.2
Liquid pipe
in.
mm
f6.4
f9.5
Liquid pipe
in.
mm
f9.5
3P405106-10 English
mm
f9.5