170
This multi-purpose unit from Potterton Commercial is an optional control device designed for the Sirius Three range of boilers. Suitable for use with a single boiler or a cascade, this versatile extension module enables control of multiple circuits as well as control of a mixture of CT and VT circuits and their associated valves and pumps with 0-10V connections. Features & Benefits: Commercial Sirius Three Control Options Sirius Three EWM Multi Function Extension Module (AVS 75), Optional accessory for Sirius Three boilers, Multi-purpose unit, Suitable for both single boilers & cascades, Helps optimise system performance, energy-efficient. Commercial Sirius Three Control Options Sirius Three EWM Multi Function Extension Module (AVS 75) Potterton Commercial 5140909