Technical data

08/06/06 - 300008460-001-B MCR 24, 24/28 MI, 30/35 MI, 34/39 MI

3.1 ON/OFF room thermostat

1. Lane 230 V - Intensity in Amperes: 3

2. Power supply - Neutral

3. Common alarm (Contact closed)*

4. Boiler in use (Contact open)*

5. Neutral

6. Tap open: DHW

7. Tap open: Heating

8. Outside sensor connection

9. Connecting the tank sensor (Remove bridge)

10. Boiler blockage input (Remove bridge)

11. Existing bridge

12. Cable BUS: AD 221 or AD 222 (Remove bridge)

13. Not connected

14. Switch: Domestic hot water (To use this function, remove the

bridge between terminals 4 and 3)

15. Existing bridge. To be used when room thermostat is connected.

16. Switch: Heating (To use this function, remove the bridge between

terminals 4 and 1)

*Depending on parameter settings



: Existing bridge



: Cable BUS: AD 221 or AD 222

MCR boilers can be connected to a 2-wire on/off room thermostat.

Choose a location in a "reference" room representative of the

room temperature to be taken into account if the remote control is

used as a room sensor.

Connect terminals 7 and 8 on the thermostat to the terminals on

connector X9.



If you are using a room thermostat with anticipation resistance,

parameter P5 must no longer be defined as 0 but as 1.