Recent content by Nerdio

When I was a kid, we used to have a connector on the end of our Christmas lights that was a bayonet fitting, so we just plugged them into a table lamp (took the bulb out and replaced it with a string of Christmas lights). I would like to do the same thing now, so we can put some lights up in...

It's been a few days since the last post, and I have been away, so have only just got a chance to look at this. With the heating set to Constant, and Hot Water off I don't have any volts on either the Orange or Grey Wire for the mid-point valve (which was on 'H'). If I press Extra Hour for...

Thanks for the reply, and tip on where to start. My programmer has been moved upstairs from downstairs, and some of the wiring seems to still be used (ie std. T&E cable disappearing out of wiring box, and programmer has 3 core flex coming in). I have enough electrical savvy I think to work it...

Just as a background, I have for a number of years run my Heating continuously with Hot Water chipping in 3 times a day, and this has all worked fine. (Heating is controlled by a programmable stat.) I now have an odd situation in that the Hot Water will not run if the Heating is on, which is...

Just a quick update. The system is cycling pretty much every 10 minutes, but this seems to die down a bit. What I think I have noticed most of all is the pump running for longer than I expect. The boiler itself only runs for 2 - 3 minutes in any one cycle. As a whole, gas usage seems...

Thanks for the reply. It is only my first day with the thermostat installed, I guess I was just surprised at what happened. The temperature is stable, at least according to the CM927, so I have no doubt it works in that respect. I am going to monitor the boilers duty cycle this eve. as I...

Thanks mikely for the reply. You've given me some confidence that the unit is the right thing to have. What I have noticed is that my pump is running for some period, then shuts off. Within minutes though it is back on again. For example, Pump turned off at 14:00. Was back on at 14:04 and ran...

I have just installed, well a heating engineer has, a Honeywell CM927 programmable thermostat. I have read that these thermostats will cycle the boiler regularly to maintain the programmed temperature. My boiler/pump seems to be cycling every 10 minutes, which is the configured cycle rate. This...

Thanks

I'm looking at installing a Honeywell CM927, or maybe the wired version. I can't seem to find out what the hysteresis is on this unit. Can anyone help?