On Sun, 11 Apr 2004 14:54:13 +0100, "Set Square"
wrote:


Matthew

Check the wiring in your junction box. When hot water only is switched on,
pins 1 and 6 in the junction box should be live. When you turn the cylinder
stat up to a high temperature, pin 8 should be live (and pin 7 not live).
When you turn the cylstat down to a low temperature, pin 8 should cease to
be live and pin 7 should become live instead.

The boiler and pump (or just the boiler if the pump is connected via an
over-run stat on the boiler) should be connected to pin 8 - so the boiler
should fire when the cylstat is turned up.

Check these things, and let us know the score.
--
Cheers,
Set Square
______
Please reply to newsgroup. Reply address is Black Hole!




Thanks for the help - not bad support for an Easter Sunday!
OK,

If I ask for HW only, pins 6,7,8 and 9 of the Danfoss wiring box are
live! This doesn't sound right!

If I drop the stat temp, then 8 and 9 go off.

The boiler is on pin 9, which in turn is linked to pin 8 (as per the
installation sheet) - which seems OK.

Pin 7 is the "HW off" from the stat, I think

Hope this is starting to make sense to someone!