Honeywell CM zone system

Joined
1 Jun 2004
Messages
2,122
Reaction score
105
Location
Lancashire
Country
United Kingdom
Grand Total = £1545 + fitting

How much do you think I should be looking at for fitting all this?
Could I possibly fit the TRV's (HR80UK) myself, is it difficult?

Freshy

I tried out the CMzone system myself. I wasn't overly impressed. The trv head units make a noise which is audible enough to wake a light sleeper. I question who is going to check the umpteen batteries in all the head units regularly. I also had a problem with the signal strength from a couple of head units back to the master unit to turn on the boiler. If you have a great distance to cover I would be a little concerned.

CMzone might be great for some applications, but the end users must have an interest in how the system works. Technophobes wouldn't want this level of complication for sure.
 
Sponsored Links
Joined
21 Aug 2007
Messages
18
Reaction score
0
Location
Northamptonshire
Country
United Kingdom
So am I right in thinking that each CM67Z can only handle 2 Zones?

Hence if you want 6 zones you will need 3 CM67z's?

Also I'm not sure how I want/should decide on zoning...

Zone1: Living Room, Dining Room, ...
Zone2 Kitchen, Study, ...
Zone3: Cloakroom, Hall, Utility, ...
Zone3: Bedrooms
Zone5: Guest Bedrooms
Zone6: Bathrooms

Shopping List

Honeywell CM Zone Pack (1 CM67Z, 1 HC60NG, 6 x HR80UK) £450
16 x HR80UK @ £65 each = £975
2 x CM67Z @ £ 60 each = £120

Grand Total = £1545 + fitting

How much do you think I should be looking at for fitting all this?
Could I possibly fit the TRV's (HR80UK) myself, is it difficult?

Thanks

Freshy

[edit]Sorry, didn't answer the question - a CM67Z can only handle two zones, and you can only have four CM67Zs bound to a boiler controller, which does limit you to eight zones with this system. The Hometronic system does have quite a few features that the CM-Zone doesn't have, but at quite an increase in cost[/edit]

In terms of install the HR80UK fits on to a range of TRV bodies, that is the wet bit of a TRV, you unscrew and remove the head and the HR80UK is fitted in it's place. Therefore you will need a TRV on each radiator that you want to control using the CM-Zone system. As I was starting from scratch I fitted Honeywell TRVs all round for this purpose so that I didn't have to worry about using the adapters etc.

You will also have to have the HC60NG wired in as a replacement to the room thermostat so that it can call for heat.

There is motor noise from a HR80UK when it's opening or closing, it's actually now just background noise, just another one of those noises a house makes. It's a bit like when you move into a new house, you notice every little noise but after a while they all just fade into the background.

The annoying thing about the HR80UK is the re-adaptation it does every now and again. There is no way to know when it's going to do it, which means it could be in the middle of the night in your babies room just as you've got them to sleep (oh yes, that was a great experience). Re-adaptation is when it checks that what it thinks is full throw of the TRV pin is actually still right. To do this is goes from one extreme to the other and back again at full speed. This is noisy, and there is no way to turn it off, have it timed or anything usefull like that.

In terms of setup (binding the bits together, the CM67Z programmes etc) I would aim to do it yourself. If your not comfortable doing that then I would suggest that the CM-Zone isn't the right system for you as you don't want to be calling someone in everytime you want to alter it slightly. The CM-Zone does appear to be aimed at mainstream householders but I wouldn't think that most of them would be capable of using it correctly.
 
Joined
26 Oct 2004
Messages
5,232
Reaction score
469
Location
Surrey
Country
United Kingdom
Hometronic allows a virtually unlimited no of heads and replaces the motley collection of 2 channel CM Zone controllers, which are not easy to use.

Once commissioned it is easier to use than CM Zone because dedicated Lifestyle pushbuttons are simply used to follow your occupancy patterns.

For instance, one of our customers has settings for when their kids are at boarding school, snooker room is in use, guests staying -second Accumulator and unvented comes on with additional heating etc.

It is a brilliant system and we are doing lots of them. I have four installations on the books to do by Xmas. Makes solar look like a total waste of effort and money.
 
Sponsored Links
Joined
24 Oct 2006
Messages
28
Reaction score
0
Location
Berkshire
Country
United Kingdom
I don't mind getting my hands dirty so I think the task of replacing the TRV's is something I could undertake myself.

I've tried changing my room stat before but I never got the new one working something to do with needing three wires but I only had two. So will need someone in to do that bit.

I work with computers and I'm pc support for most my family and friends so I think programming/setting my heating system should be ok, even if I have to read the manual! ;)

I think I will take the plunge and see what results I get, worse case scenario is I sell the bits on ebay to make way for a new boiler & megaflo!

Thanks for sharing your thoughts.

Freshy
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Top