Part
1. Overview
DCM014A51
Design Guide
11
2.4 Commanding Mode Change for Heat Recovery and Heat Pump Systems
What is a Changeover Master?
1. When the
VRV
contractor has commissioned a Heat Pump system, an indoor unit can be
nominated as the changeover master. This allows the nominated unit to change the mode of
operation for all units connected to the same outdoor unit.
Figure 8. Heat Pump System
2. A Heat Recovery system can utilize BS Boxes to provide simultaneous heating and cooling for
each zone.
Figure 9. Heat Recovery System
3. Every unit or group of units connected to a BS Box port can either be in cooling or heating
mode, i.e., units connected to the same BS Box port operate as a mini Heat Pump system.