Vitotrol 100 Open Therm.
The Viessmann CM737 Vitotrol 100 is an open therm programmable heating controller designed to control your heating system efficiently, providing comfortable temperatures when you are at home and energy savings when you are away.
Features and benefits:
- Ergonomic user interface featuring an 'OK-button.'
- Large LCD (Liquid Crystal Display) screen.
- 7-day heating program to match your lifestyle whilst maximising energy savings
- 4 independent temperature levels per day (from 5 to 35 degrees centigrade).
- Holiday button savings energy by letting you reduce the temperature for 1 to 99 days
- Built-in memory holds the user program indefinitely
Complete with X21 Lead.
Fits:
- Vitodens 100-W WB1B WB1C B1*A B1*C System and Combi (Not Compact)
- Vitodens 111-W