expansion module b for gema control ffhk Approval for Switzerland according to

Approval for Switzerland according to VKF

It is designed for use in closed heating systems

so you can quickly get your heating system back up and running

Vaillant VR 32/3 modulating bus coupler

ensuring reliable operation even at high system temperatures

expansion module b for gema control ffhk Approval for Switzerland according toExpansion module B for ecoMax 850 and Gema Control 920: More flexibility for your heating control Expansion Module B offers an ideal solution for expanding your heating control systems. It enables the control of two additional mixed heating circuits and the integration of room thermostats. Designed for use with the Plum ecoMax 850i and the Gema Control 920 series, this module offers maximum adaptability and comfort. This expansion allows modern