Immergas MAGIS M4-30 Use And Installation page 34

Mode setting control.
Esterno
1
1 Main unit
2 User interface
4 Balance tank
4.1 Automatic air purge valve
4.2 Discharge valve
5 P_o: External circulation pump
10 Expansion vessel
12 Filter (accessory)
• Space Heating/Cooling.
e cooling or heating mode is set on the room thermostat, the water temperature is set on the user interface.
1) When "C" on the thermostat closes, the system will be set in cooling mode (*).
2) When "H" on the thermostat closes and "C" opens, the system will be set in heating mode.
• Circulation pumps operation.
1) When the system is in cooling mode, which means "C" on the thermostat closed, SV2 remains OFF, P_o starts to run.
2) When the system is in heating mode, which means "H" on the thermostat closed and "C" opened, SV2 remains ON,
P_o starts to run.
(*): By C closed we mean: closed contact between C and L1 for the high-voltage room thermostat or closed contact between
CL and COM for the low-voltage thermostat
2
S20
14
17
15
14
12
16
16
Assembly unit
Interno
10
4.1
5
4
4.2
Code
14 Cut-o valve
16 Discharge valve
19 Manifold/distributor
20 Bypass valve
22 SV2: 3-way valve
S20 Room thermostat
FHL
Floor heating circuit
1... n
FUC
Fan coil
1... n
19
FCU1 FCU2 FCUn
19
FHL1 FHL2 FHLn
Assembly unit
20