Honeywell CM901 Programmable Room Thermostat - £49.99 Screwfix - HotUKDeals
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Electronic sensing element. 3 wire installation. Override facility. Holiday mode. Automatic BST/GMT time change.

Digital Display
6 On/Off Periods per Day
1 Preset Programme
24 Hour Programmable
3 Wire Installation (It does 2 wire installations )
Frost Protection


THIS IS NOT WIRELESS!!!

more info
http://www.honeywelluk.com/products/Programmable-Thermostats/TPI/CM927/
- adam2116
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5y, 11m agoFound 5 years, 11 months ago
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#1
I have one of these.

Fitted it last month. Its dead easy & now it is just set to run on auto.

Spend an extra 1p for free delivery.....

tap washer?



Edited By: YouDontWantToKnow on Dec 28, 2010 00:04
#2
-11°

X)

This place cracks me up.

Edited By: YouDontWantToKnow on Dec 28, 2010 00:18
1 Like #3
Needs some heat!
Excellent bit of kit... but mine did lose the mapping to the control box the other day... no idea why!
#4
mateus
Needs some heat!
Excellent bit of kit... but mine did lose the mapping to the control box the other day... no idea why!


Unless people are on wireless everyone should buy one of these.

You will never have to touch the thermostat again.

Well every 2 years when you change the batteries. ;)
#5
I am a total luddite so please help me out here - I have a (assume quite old) manual dial thermostat. Would I be able to replace that with this quite easily?
#6
Just bought an equivalent 'ECO' brand device from Toolstation for under £20. This seems to basically do the same thing although you can only set 4 different temperatures per day (different programs for M-F, S and S). Also possibly not quite a good looking as the Honeywell device as it doesn't have the buttons hidden under a flap. On the plus side though it is only a two wire model, so should be suitable for replacing any stat.
#7
Mid to high £40s seems to be the standard price for this.
#8
freddykrueger
I am a total luddite so please help me out here - I have a (assume quite old) manual dial thermostat. Would I be able to replace that with this quite easily?


I am pretty sure this can do 2 wires also so it can replace pretty much any thermostat.


But if its only 3 wire if you just unscrew it & have a look how many wires are behind it. If there is 3 or more you are fine. You may have to look under the plate because if you only have 2 attached some have "spare" wires shoved in loose behind it.

You could have live & switch live attached & earth and a neutral shoved in & not attached.

Its pretty much straight forward & takes minutes.


Edited By: YouDontWantToKnow on Dec 28, 2010 00:44
#9
StephenB
Mid to high £40s seems to be the standard price for this.


Not on the high street.

Its circa £60

There are internet companies I have never heard of sell it around £45-£50 but none I would give my card details to.
#10
YouDontWantToKnow
I am pretty sure this can do 2 wires also so it can replace pretty much any thermostat.

No, 3 wire only. This doesn't use batteries like other models, so requires a neutral (not required on the battery versions), a live feed & a load. So you need to make sure you have a neutral, if not then you can only use the battery versions.

Edited By: Derek_Duval on Dec 28, 2010 00:55
#11
Derek_Duval
YouDontWantToKnow
I am pretty sure this can do 2 wires also so it can replace pretty much any thermostat.


No, 3 wire only. This doesn't use batteries like other models, so requires a neutral (not required on the battery versions), a live feed & a load. So you need to make sure you have a neutral, if not then you can only use the battery versions.



Like I said.

Switch/contact rating: volt free (switches 24 - 230V). Temp. range: 5° - 30°C. H x W x D: 89 x 133 x 26mm. 2 x AA batteries supplied.

http://www.screwfix.com/sfd/i/cat/pdfs/64/p4734564.pdf <<<<<<<<< instructions for 2 wire installations





Edited By: YouDontWantToKnow on Dec 28, 2010 01:08: add note
#12
Sorry, my mistake, confusing it with another model. Runs volt free only.
Installation instructions here to clarify
Installation instructions

Edited By: Derek_Duval on Dec 28, 2010 01:13
#13
YouDontWantToKnow
Derek_Duval
YouDontWantToKnow
I am pretty sure this can do 2 wires also so it can replace pretty much any thermostat.
No, 3 wire only. This doesn't use batteries like other models, so requires a neutral (not required on the battery versions), a live feed & a load. So you need to make sure you have a neutral, if not then you can only use the battery versions.
Like I said.Switch/contact rating: volt free (switches 24 - 230V). Temp. range: 5° - 30°C. H x W x D: 89 x 133 x 26mm.2 x AA batteries supplied. http://www.screwfix.com/sfd/i/cat/pdfs/64/p4734564.pdf <<<<<<<<< instructions for 2 wire installations

I have this 2 wire version got it from B & Q was £30 , since then seen it at screw fix it for £23 as 4 programmable setting and will work if you have no neutral at your stat, i think i would like to try one of them wireless ones out as my stat location is rubish its on same wall as my boiler so not ideal.


http://www.screwfix.com/prods/17585/Plumbing/Central-Heating-Controls/Horstmann-DRT2-Room-Thermostat

Edited By: blaster on Dec 28, 2010 01:19
#14
sorry to sound a bit dense, i'm guessing this isn't wireless?
#15
my house is about 10years old but has a dial thermostat in the hallway. I lso have a control box underneth the boiler which you can pogram the heating and water, but it doesnt allow for weekends so if we want a lay in on the weekend I have to switch the heating off or it comes on really early and its hot and everyone wakes up. i want to fit one of these electronic ones but ive just took the cover off mine and i have these wires......

[img]http://d.imagehost.org/0404/IMG-20101228-00342.jpg[/img]


Edited By: essexgangsta on Dec 28, 2010 10:05: pics
#16
Newbie here - I have a separate boiler and water tank, the water tank is upstairs and the controls to set the timer and when the heating/water is on or not. Downstairs is my thermostat. Does this replace the thermostat and then control both the thermostat and timer?
#17
Will look into this.
Thanks
#18
dont buy a wireless one i have one its a pain in the backside........ looses the signal all the time ..... and the reciever seem to do what they want from time to time ..... had 3 recievers in just over 3yrs mine were drayton rf3 ....... but maybe im unlucky .....
#19
Quick warning guys. Most will know, but as some of you are describing yourselves as newbies, then it's worth pointing out that the wires on your thermostat will be carrying mains voltages, so make sure you isolate the thermostat feed before you start to play!
1 Like #20
MrFizzy
Quick warning guys. Most will know, but as some of you are describing yourselves as newbies, then it's worth pointing out that the wires on your thermostat will be carrying mains voltages, so make sure you isolate the thermostat feed before you start to play!


I would recommend switching off the whole house. :)
#21
I am using this for the last year (came with my new boiler. The great thing is that I can take it in the room I use and get the right heat where i need it. It's also easy to over-ride with just two button presses. I am quite happy with it. Not sure about the price because i didn't pay for it deparately. Heat anyway for functionality.
1 Like #22
essexgangsta
my house is about 10years old but has a dial thermostat in the hallway. I lso have a control box underneth the boiler which you can pogram the heating and water, but it doesnt allow for weekends so if we want a lay in on the weekend I have to switch the heating off or it comes on really early and its hot and everyone wakes up. i want to fit one of these electronic ones but ive just took the cover off mine and i have these wires......

[img]%3Ca%20class=[/img]http://d.imagehost.org/0404/IMG-20101228-00342.jpg" alt="http://d.imagehost.org/0404/IMG-20101228-00342.jpg" alt="[img]http://d.imagehost.org/0404/IMG-20101228-00342.jpg" />" />



You can fit this easy in its place.

Just remember not to cut the earth wire back if you do not need it (I do not think you do). Just put a termination block on the end & tuck it in behind because you might want it at a later date.
#23
pet2000
I am using this for the last year (came with my new boiler. The great thing is that I can take it in the room I use and get the right heat where i need it. It's also easy to over-ride with just two button presses. I am quite happy with it. Not sure about the price because i didn't pay for it deparately. Heat anyway for functionality.


This isnt what you have. This is a fixed position, wired, programmable thermostat.
#24
YouDontWantToKnow
essexgangsta
my house is about 10years old but has a dial thermostat in the hallway. I lso have a control box underneth the boiler which you can pogram the heating and water, but it doesnt allow for weekends so if we want a lay in on the weekend I have to switch the heating off or it comes on really early and its hot and everyone wakes up. i want to fit one of these electronic ones but ive just took the cover off mine and i have these wires...... [img]%3Ca%20class=[/img]http://d.imagehost.org/0404/IMG-20101228-00342.jpg" alt="http://d.imagehost.org/0404/IMG-20101228-00342.jpg" alt="[img]http://d.imagehost.org/0404/IMG-20101228-00342.jpg" />" />
You can fit this easy in its place. Just remember not to cut the earth wire back if you do not need it (I do not think you do). Just put a termination block on the end & tuck it in behind because you might want it at a later date.

I think you'll have to do this with the neutral wire aswell. Assuming it's the same wiring as mine it's the blue wire, the red is the live feed & the yellow is the load. Double check this though, as there is a chance it won't be the same as mine.


Edited By: Derek_Duval on Dec 28, 2010 13:01
1 Like #25
essexgangsta
can anyone comment on my pic above, would this work?


Yes, it would work but you would need to work out which is live (probably red) & which is switch live (either blue or plain yellow not yellow/green).

See above posts.
#26
YouDontWantToKnow
essexgangsta
can anyone comment on my pic above, would this work?


Yes, it would work but you would need to work out which is live (probably red) & which is switch live (either blue or plain yellow not yellow/green).

See above posts.

ok thanks, hmm, so will have to get a electrician in then to see which is which.
#27
essexgangsta
YouDontWantToKnow
essexgangsta
can anyone comment on my pic above, would this work?


Yes, it would work but you would need to work out which is live (probably red) & which is switch live (either blue or plain yellow not yellow/green).

See above posts.

ok thanks, hmm, so will have to get a electrician in then to see which is which.


You could just google & find the drawing for the thermostat you have now.
#28
inside the cover is a wiring diagram...

[img]http://b.imagehost.org/0429/IMG-20101228-00343.jpg[/img]
#29
Red is your live & I think plain yellow (95% sure) is your switch live but I cant tell because of the earth (green/yellow) going over it.

I think I see the yellow coming out the wall & looping back on itself.

Edited By: YouDontWantToKnow on Dec 28, 2010 17:20
#30
YouDontWantToKnow
Red is your live & I think plain yellow (95% sure) is your switch live but I cant tell because of the earth (green/yellow) going over it.

I think I see the yellow coming out the wall & looping back on itself.


hi, thanks for replying..... ive took a better pic

[img]http://b.imagehost.org/0017/IMG-20101228-00345.jpg[/img]
1 Like #31
essexgangsta
YouDontWantToKnow
Red is your live & I think plain yellow (95% sure) is your switch live but I cant tell because of the earth (green/yellow) going over it.I think I see the yellow coming out the wall & looping back on itself.
hi, thanks for replying..... ive took a better pic[img]http://b.imagehost.org/0017/IMG-20101228-00345.jpg" alt="http://b.imagehost.org/0017/IMG-20101228-00345.jpg" alt="[img]http://b.imagehost.org/0017/IMG-20101228-00345.jpg" />" />

That confirms the wiring colours I gave in my previous post. All you need is the yellow & red wires, terminate the other 2 wires.

Edited By: Derek_Duval on Dec 28, 2010 18:16
1 Like #32
Yellow is the switch live to go back to the boiler.

Edited By: YouDontWantToKnow on Dec 28, 2010 18:34
1 Like #33
Fitted one of these a few weeks ago, so much better than the dial type.

You need Red (Live), Yellow (switched), terminate (yellow/green (earth) and blue (neutral)).

Dont worry if you get them mixed up in A&B, itll just be a case of switching round, seem to recall yellow to A. But cant guarantee so check with a meter or get someone else to help you. TURN OFF POWER FIRST!!!

Edited By: twist on Dec 28, 2010 20:42
banned#34
go into any branch of CEF . Denmans , Newey & Ayre , edmunsons and you can pick these up for £40 + vat and you dont have to be trade as all sell to the public
#35
Oh the irony of voting a thermostat cold!

This unit was overpriced at Screwfix at £69, and can be generally purchased at £40-£50 at most places
#36
Can I use this for controlling the temperature for my tomatoes?:{
3 Likes #37
Spend an extra ~£10 on the CM907 to have a 7 day programmer.
#38
These are brilliant got one hooked up to my top of the line valiant boiler. This is widely thought of as the best wireless stat it's easy to connect to compatible boilers has excellent range and is easy to program. Ours works over all 4 floors in our Victorian house with thick walls and floors never any drop outs if you are getting problems you are not using one of these or it's not setup right.
#39
alera
These are brilliant got one hooked up to my top of the line valiant boiler. This is widely thought of as the best wireless stat it's easy to connect to compatible boilers has excellent range and is easy to program. Ours works over all 4 floors in our Victorian house with thick walls and floors never any drop outs if you are getting problems you are not using one of these or it's not setup right.


Apart from the fact this isn't a wireless stat.
#40
Waldolf

This unit ..... can be generally purchased at £40-£50 at most places


Link please

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