The BC Controller is the technological heart of the CITY MULTI R2-/WR2-Series. It works in unison with the outdoor unit to provide simultaneous cooling and heating, something no other two-pipe system can do.
* Single BC Controller: Used when only one BC controller is required. For systems with up to 120,000 Btu/h nominal cooling capacity.
* Main BC Controller: For systems with up to 288,000 Btu/h nominal cooling capacity and when use of Sub BC Controllers is desired.
* Sub BC Controller: Used with a Main BC controller to connect additional indoor units. A maximum of two Sub BC Controllers canbe connected to one Main BC Controller per system.