Hi
I have a pair of 2 way zone valves controlling my heating system that I would like to replace. They are OK at the moment (touch wood) but one squeals a little and the other has a power head that slips occasionally.
They are similar to these Honeywell valves http://www.honeywell-controls.co.uk/productView.php?ProdID=310825&cat1=Honeywell Controls but instead of the 1" BSP thread they have a non-standard female thread, no longer available in this country (to the best of my knowledge).
Also, they have 6 wire power heads and the valves are normally closed.
They are fitted to 28mm pipe work but this is stepped up from 22mm then reduced down again immediately after the valve.
I would like to replace them with their 22mm compression fit equivalent as this would be the easiest option to fit, simplify the pipework and wont require any more floor boards to be removed (I forgot to say they are under the floor boards). It would also be the cheapest option and I hope, this model wont become obsolete in my life time.
Unfortunately though, as I understand it, the 22mm compression fitting valves have 5 wires.
Is it possible to wire a 5 wire valve into a 6 wire system, if so how ?
And would the flow restriction be a problem ?
(It's a vented system running 5 radiators in a relatively small 2 up 2 down house. I want to change the entire valve and not the power head).
Can anyone help ?
Thanks for reading.
I have a pair of 2 way zone valves controlling my heating system that I would like to replace. They are OK at the moment (touch wood) but one squeals a little and the other has a power head that slips occasionally.
They are similar to these Honeywell valves http://www.honeywell-controls.co.uk/productView.php?ProdID=310825&cat1=Honeywell Controls but instead of the 1" BSP thread they have a non-standard female thread, no longer available in this country (to the best of my knowledge).
Also, they have 6 wire power heads and the valves are normally closed.
They are fitted to 28mm pipe work but this is stepped up from 22mm then reduced down again immediately after the valve.
I would like to replace them with their 22mm compression fit equivalent as this would be the easiest option to fit, simplify the pipework and wont require any more floor boards to be removed (I forgot to say they are under the floor boards). It would also be the cheapest option and I hope, this model wont become obsolete in my life time.
Unfortunately though, as I understand it, the 22mm compression fitting valves have 5 wires.
Is it possible to wire a 5 wire valve into a 6 wire system, if so how ?
And would the flow restriction be a problem ?
(It's a vented system running 5 radiators in a relatively small 2 up 2 down house. I want to change the entire valve and not the power head).
Can anyone help ?
Thanks for reading.