I’m considering to switch my heating-system to a velbus-controlled one. As I understand it, the VMB1TS can be programmed to (de)activate a relay output when heating (or cooling) is needed. This relay contact will control a valve of some sort to open/close the water-flow to the radiators.
What brands & types of valves are you using? What brand/type is recommended? What is the (approx) price and where are the sold?
Are these valves usually placed centrally at the distribution point? or locally on each radiator?
Hello,
I 've used actuators from Honeywell and Calefi. They are placed on the body off a radiator valve. Price is about a 35€/actuator.
In my situation I plaeced the valves on the collector. In this way I didn’t need to have a cable to each radiator. Some of my radiators are on the same valve and the flow is regulated on a valve at the raditor itself (ie the bathroom, livingroom).
The consumtion of an actuator is +/- 3 watts and the dead timt (time to go from close/opening) is 3 minutes.
A lot depends on what valves you’re about to use. Best is to go to a plumber store and see with wich manufactor they work. I use to ones without switches, the only problem you’ll have than is that the pump will be running for max 3 minutes without a valve opened. You can solve this with for ex a radiator wich is always opened (hallway radiator, towell drier) or you can use a presuure controlled bypass valve. The last option can also elliminate the sound of the water flow when there are not enough radiators open.