Daikin VRV
Coming Soon...
1 Port
Mini Single-Ports 8'' Tall
***Warning: Transitioning to R-32***
Model: BSQ_T
Refrigerant: R-410A
![Mini Single-Ports 8'' Tall]()
4, 6, 8 Ports
Slim Pipe-Through Flex Multi-Ports 10'' Tall
***Warning: Transitioning to R-32***
Model: BSF_Q
Refrigerant: R-410A
![Slim Pipe-Through Flex Multi-Ports 10'' Tall]()
10, 12 Ports
Standard Multi-Ports 12'' Tall
***Warning: Transitioning to R-32***
Model: BS_Q
Refrigerant: R-410A
![Standard Multi-Ports 12'' Tall]()
What is a branch selector box?
Branch selector boxes (BSB) are used only with simultaneous heating and cooling heat recovery systems. Three pipes (suction gas, liquid, high/low pressure gas) are run from the condensing unit to the BSB. Two pipes are then run from the BSB to the indoor unit(s). Please see the image below for an example configuration.
Mid rise residential
With Single Ports
Low rise commercial
With Multi Ports
Single Ports VS Multi Ports
| Criteria | Mini Single Ports | Slim Pipe-Through Flex Multi-Ports | Standard Multi-Ports |
|---|---|---|---|
| Number of Ports | 1 | 4, 6, 8 | 10, 12 |
| MBH per Port | 96 | 54 | 54 |
| Technical Cooling | Yes* | Yes* | No |
| Drain Connection Needed | No | No | No |
| Re-positional electrical box | Yes | Yes | No |
- Why do not see any R-32 branch selector boxes?
Information on Daikin R-32 branch selector boxes are not yet publicaly available. Contact your local Daikin representatives for preliminary information and selections on R-32 VRV heat recovery systems. Note that many R-410A systems are approaching or already beyond their last order dates. IMPORTANT: Only R-410A branch selector boxes can be used with R-410A outdoor units, and only R-32 branch selector boxes can be used with R-32 outdoor units. They cannot be mixed and matched.
- Where can I learn more about R-32 and the refrigerant transition?
Please visit the DXS Refrigerant Transition Resource Center for more information: https://info.dxseng.com/dxs-refrigerant-transition-resource-center
- Why do Daikin branch selector boxes NOT require any drain connections, while others do?
Two main reasons: First, the 3-pipe heat recovery system results in the boxes not requiring a heat exchanger to separate the mixed phase supply line of typical 2-pipe heat recovery systems. These heat exchangers usually generate condensate. Second, all Daikin branch selector boxes are fully foam insulated from the factory, preventing any copper piping or expansion valve body from being exposed. This insulation improves performance, reduces sound levels and ensures no condensate drains are ever required.
- Why do most manufacturers use 3-pipes instead of 2-pipes for heat recovery systems?
There are many reasons and advantages to 3-pipe heat recovery systems, revolving around improved efficiency, low ambient heating, reduced refrigerant charges and branch selector box flexibility. In heating, the 3rd pipe becomes a dedicated hot gas line off the compressor, resulting in no capacity and efficiency losses in heating, and the maintenance of high discharge air temperatures in low ambient conditions. In cooling, the 3rd pipe acts as a secondary suction line, also reducing pipe losses and improving efficiency. The 3-pipe arrangement also allows Daikin branch selector boxes to not need any drain connections, reducing install costs. Finally, this arrangement allows for a mix of small single port branch boxes, all the way to 12 port branch boxes, which can be optimized in buildings for an overall reduction in piping and installation cost.
- Where can I mount these branch selector boxes?
The mounting location is relatively flexible. They can go in ceilings, in closests / storage rooms, in mechanical rooms, or even right below the VRV indoor unit (for example, when using vertical ducted indoor units). They do not need to be in full conditioned spaces, however they should not be installed outdoors. The location should be chosen based on a few criteria: optimizing / reducing the overall amount of refrigerant piping and install costs; proper space around the box to ensure enough service space and enough length of straight copper pipe in and out of the box (usually 18"); and finally, proper access for service of the electrical panel and of any field installed isolation valves.