Honeywell CM921 question?

[Robert Needham]

I'm having problems setting the times on the above wireless room stat.
Can it be reset to factory settings or something please?

 

[Dan Robinson]

It can but it probably won't solve your problem..... which is a little vague in its description

 

[Robert Needham]

Yeah, sorry Dan you're correct it wasn't very informative was it.

it's my partners stat feeding a Combi (, I think it's the Worcester, but cant remember the model afraid)
Ive tried to set the room stat to 6am on no1 setting 9am No2
Then set No 3 & 4 stetting for the evening, disabling settings 4 & 5... thus giving heating on twice a day, and not 3 times.
I've tried it the other way around, by disabling 2 & 3 and using 3 & 4 for the evening, but the boiler stays on in between times.
I hope that's clear enough for you?

 

[Dan Robinson]

You need to disable 3 & 4 and use 5 & 6 for the evening.

1 & 2 for the morning.

Or alternatively set 3 & 4 to be the same time and temperature as each other (or 2, or 5).

 

[Robert Needham]

Many thanks Dan.
I'll have another go tonight.

 

[Robert Needham]

Well, I did both of what you suggested and unfortunately it didn't work.
The boiler still stays on after the off times.
So there's obviously something amiss.
Perhaps I should call Honeywell to see if they can help?

 

[jackthom]

Did you set the temperatures of 2, 3, 4 and 6 to be nice and low just to be on the safe side, say 12C for example ?

 

[Robert Needham]

No I didn't I set them for 21 which is what they were b/4 the problems thanks.

 

[jackthom]

Just to clarify..

1) will be CH ON in the morning and should be set to 21C if that's how warm you'd like it.

2) 3) 4) should all be set low (eg 12C) so there's no danger of the heating coming on at those settings and it will stay OFF from the time set by number 2.

5) will be CH ON in the evening, again set this to 21C or as warm as you wish.

6) should be set low (12C ?) so the heating stays OFF overnight.

 

[Robert Needham]

Oh I see.
That makes sense now.
Will have another go tonight.
many thanks.

 

[Robert Needham]

good news
It seems to work OK now.
I set it to go off at 9pm set to 10 degrees.
and it was off when we got in at 11ish.
Many thanks for the help