Connecting Valves to a Manifold Controller
When working on a project with underfloor heating, care is needed when specifying or ordering the valve heads. Below are some common manifold controllers and the required valve type. Also listed is the recommended number of valves or current rating of each output.
|Make and Model||Valve Voltage||Max Current per Channel/Max Actuators|
|ABB VAA/S x.230.2.1||24V - 230VAC||160mA Resistive Load|
|GIRA 215800||24V - 230VAC||160mA Resistive Load|
|Theben HMT6 or 12||24VAC only (24VAC generated internally)||13 Valves on the device|
|Theben HMG6T or HME6T||24V - 230VAC||450mA across 3 channels|
|ZENNIO HeatingBOX: 230VAC||230VAC||200mA|
If you are supplying the valves you will probably need a valve adaptor to ensure a snug fit - all KNX manufacturers have valve adaptors as accessories.
The other approach is to request the supplier of the manifold to also supply the valves. This removes any question over compatibility, but make sure you define the voltage as per the above.