1. VRV System Overview
DCM014A51
Quick User Guide
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1. VRV System Overview
The Daikin VRV system consists of outdoor units, indoor units, zone controllers, centralized controllers, and BMS
Interfaces. The VRV system communicates by using a proprietary protocol, which is communicated on the DIII-Net
bus. When a centralized controller or a BMS interface is connected to the DIII-Net bus, a unique group address is
required for the unit to be monitored and controlled. The customizable Daikin control system is built around the
VRV system, and does not require any advanced field engineering (such as programming) for the control of the
VRV system, except for individual indoor unit and controls configurations.
2. Types of Daikin VRV Systems
The VRV system can consist of Heat Recovery systems, Heat Pump systems, or a system that is a combination of
both. (Refer to iTM BACnet® Server Design Guide – Part 1 for more details.)
1. Heat Recovery systems can provide simultaneous cooling and heating to each indoor unit served by the
same outdoor unit with the use of Branch Selector Boxes (BS Box).
2. Heat Pump systems only allow each outdoor unit and its connected indoor units to be in either cooling
or heating at any one time. Multiple Heat Pumps systems can be installed at a site and will operate
independently of each other in their own operation mode (Cool, Heat, Fan, Dry, and Auto).
Outdoor
Units
Indoor
Units
Branch
Selector
Box
Indoor
Units
Outdoor
Units
