Pump Logic - DeDietrich MCR 24 Technical Instructions

8 Pump logic

- In mode (domestic hot water) or with Easymatic in
(Summer), the pump operates during the production of domestic
hot water. With an Easymatic, the pump shuts down after the pump
flow switch-off delay. The heating/domestic hot water reversal
valve remains in the DHW position.
- With room temperature thermostat
- The pump switches off 2 minutes after the contact with the room
temperature thermostat is opened. After the production of
domestic hot water, if the room temperature thermostat is open,
the pump switches off after 5 seconds and the heating/domestic
hot water reversal valve remains in the DHW position.
With Easymatic or Easyradio
- When the desired room temperature is not reached, the pump
operates continually. When the room temperature is too high, the
pump is shut down after the pump switch-off delay (See
"Easymatic"). If the room temperature is too high after domestic hot
water production, the pump shuts down after the pump switch-off
delay; the heating/DHW reversal valve remains in the DHW
position (See "Easymatic").
- Easymatic and outside temperature sensor or Outside sensor
alone
Refer to the instructions delivered with the package.
- If necessary, when the boiler temperature falls below 10°C, the
pump starts up to ensure that the boiler is protected from frost.
08/06/06 - 300008460-001-B
mode
MCR 24, 24/28 MI, 30/35 MI, 34/39 MI
33