Hi all,
Managed to confuse myself, not difficult at the moment.
Basically I have an electrician round and one of the jobs is to replace the current programmer with one that gives a few more options.
I'm not sure what to replace with though.
We have gravity HW and pumped CH, a mid position valve. Also have an old mechanical stat in the living room.
Ideally we want something that lets us control the HW and CH timing independantly, maybe an extra time zone.
I was looking at Horstmann H21XL channel plus but not sure now I've looked at this link
http://www.horstmann.co.uk/downloads/ElectronicDocuments/Central-Heating/H21-27-27ZXL-ISeries2.pdf
Looking at the 6 wiring diagrams which is relevant to my system???
Any help appricated.
Managed to confuse myself, not difficult at the moment.
Basically I have an electrician round and one of the jobs is to replace the current programmer with one that gives a few more options.
I'm not sure what to replace with though.
We have gravity HW and pumped CH, a mid position valve. Also have an old mechanical stat in the living room.
Ideally we want something that lets us control the HW and CH timing independantly, maybe an extra time zone.
I was looking at Horstmann H21XL channel plus but not sure now I've looked at this link
http://www.horstmann.co.uk/downloads/ElectronicDocuments/Central-Heating/H21-27-27ZXL-ISeries2.pdf
Looking at the 6 wiring diagrams which is relevant to my system???
Any help appricated.