Central Heating Wiring Centres

[KenB]

List,

I have now found details of how the 10 way terminal block cheapo Honeywell "wiring centre" is supposed to be configured.  It's fairly straightforward when you know what the various terminals and interconnections are - shame it ended up as such a rats-nest.

However for just £12 Honeywell  have a better one which has clearly labelled and separate terminals for each wire from each valve, pump, stat etc and all the interconnections are made with a pcb.  Virtually idiot proof 

http://content.honeywell.com/UK/homes/FAQ/wircenop.pdf

I've also ordered a pipestat for £7 which will start up the accelerator pump when the woodstove boiler gets up to a sensible temperature.  Does anyone have an idea of how far from the stove on the rising flowpipe these pipestats should be mounted?


Ken

[tony.]

ashley rock do a joint box i think its called a rb4, rectangular grey in two parts long enought to take 12 bits of connector block, it also comes with a printed card to identify each connector(not supplied) with a few tyraps to secure cables,

tony

[dhaslam]

The wiring blocks do a neat job, I have two of the Honeywell eight way ones for the underfloor valves. 

The thermostat is best near the boiler because otherwise there can be quite a delay before the hot water reaches the thermostat.  Also having it near the stove allows small adjustments to get the circulation going.   If there is a thermostat on the stove the two settings need to be matched so the air inlet  doesn't close fully because the circulation has been stopped by the other thermostat  being set too high. 

[martin W]

Very old post, but I just came across it and thought I put my 2p in... grahams the plumbers merchant do they own version (altech) and whilst it is quite a bit bigger than the honeywell one, it has loads of room, some pre-wiring and can be  reconfiguired for diffent uses. Also its cheap (£8) IIRC.