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Aircon467
17-03-2013, 11:29 AM
Ive been looking around and struggling to find a
3 wire SPST or 3 wire SPDT to the correct spec.

I have found the drayton za3 679-3... Does what i want but says max pressure is 0.7 bar (not sure if this is differential or total)

My heating system is 2.2bar.

So what 22mm valves do you use. For diverting heating or hot water circuit ???

install monkey
17-03-2013, 11:37 AM
thats differential pressure, its rated for 8.6bar- any heating system component has to be rated above the 3.5bar pressure relief valve (blow off)
http://www.draytoncontrols.co.uk/supportingdocuments.aspx?id=1504#

Aircon467
17-03-2013, 12:12 PM
Thanks pal. !!