Immergas MAGIS M4-30 Use And Installation page 43

• Pump operation and space heating and cooling.
The unit will switch to heating or cooling mode depending on the setting made on the room thermostat. When the room
thermostat (S20) demands space heating/cooling, the pump is activated and the unit (1) switches to heating/cooling mode.
The unit (1) will run to reach the required cold/hot water outlet temperature. In cooling mode, the 3-way valve (19) closes
so that cold water does not flow through the floor heating circuits (FHL).
CAUTION
Make sure to connect the wires of the thermostat to the correct terminals and to properly configure the ROOM THER-
MOSTAT in the control panel. (Chap. 10.5 Settings on field/ROOM THERMOSTAT). The room thermostat must be
wired following method A according to that described in Chap. 9.7.6 Connection for other components/For the room
thermostat.
The wiring of the 3-way valve (19) is different for an NC (normally closed) and NO (normally open) valve!
Make sure to connect to the correct terminal numbers as indicated in the connection diagram.
Heating/cooling cannot be set ON/OFF from the control panel, the nominal temperature of the outlet water must be set
in the control panel.
• Domestic hot water heating.
How domestic hot water is heated is described in Chap. 8.5 Application 2.
43