Horstmann C21 Centaur Plus Programmer
The CentaurPlus Series 2 range of single channel time switches
and two channel heating programmers are completely upgraded
and now feature a new back lit display and an automatic GMT/BST clock.
Horstmann Wiring Guide App for iPhone & Ipad
Twin circuit electronic programmer
- 3 On and Off settings for HW and
3 On and Off settings for CH per day.
- Simple to use: just three buttons control normal operation.
- Back lit display
- Automatic GMT/BST clock
One hour boost HW ( only ) and
instant advance for CH ( only ).
- 18 month battery back up.
- 3A contacts, plug-in plate.