![DeDietrich MCR 24 Скачать руководство пользователя страница 31](http://html1.mh-extra.com/html/dedietrich/mcr-24/mcr-24_technical-instructions_2462482031.webp)
31
08/06/06 - 300008460-001-B
MCR 24, 24/28 MI, 30/35 MI, 34/39 MI
4 Connection of the domestic hot water sensor
: Existing bridge
: Connecting the tank sensor
If an external domestic hot water tank is used with the MCR boiler,
the probe without power from the domestic hot water tank can be
connected to connectors 3 and 4 of terminal block X9.
The control unit automatically detects the presence of an external
sensor.
5 Antifreeze protection
: Existing bridge
: Cable
BUS
: AD 221 or AD 222 or Thermostat ON/OFF
MCR boilers must be installed in a frost-free environment
If the temperature of the central heating water in the boiler falls too
much, the integrated protection device switches itself on:
- If the water temperature is lower than 7°C, the circulating pump is
activated,
- If the water temperature is lower than 3°C, the boiler is activated,
- When the water temperature is above 10 °C, the boiler is switched
off and the circulation pump runs for another 15 minutes.
If a room thermostat, connected via connectors 7 and 8, is
activated, the boiler will operate permanently until it
reaches the outlet setting point.