Immergas MAGIS M4-30 Use And Installation page 94

There are three methods to connect the thermostat cable (as described in the image above) and it depends on the application.
• METHOD A (Set mode control).
RT can control heating and cooling individually, like the control panel for 4-pipe FCU. When the hydraulic module is
connected with the external temperature controller, on the control panel, in the FOR SERVICEMAN menu, set ROOM
THERMOSTAT at MODE SETTING:
A.1 When the unit detects a 12VDC voltage between CL and COM, the unit runs in cooling mode.
A.2 When the unit detects a 12VDC voltage between HT and COM, the unit runs in heating mode.
A.3 When the unit detects a 0VDC voltage for both sides (CL-COM, HT-COM), the unit stops operating for floor heating
or cooling.
A.4 When the unit detects a 12VDC voltage for both sides (CL-COM, HT-COM), the unit runs in cooling mode.
• METHOD B (One zone control).
RT supplies the switching signal to the unit. On the control panel, in the FOR SERVICEMAN menu, set ROOM THER-
MOSTAT at ONE ZONE:
B.1 When the unit detects a 12VDC voltage between HT and COM, the unit switches on.
B.2 When the unit detects a 0VDC voltage between HT and COM, the unit switches off.
• METHOD C (Double zone control).
The hydraulic module is connected with two room thermostats, on the control panel, in the FOR SERVICEMAN menu,
set ROOM THERMOSTAT at DOUBLE ZONE:
C.1 When the unit detects a 12VDC voltage between HT and COM, zone 1 switches on. When the unit detects a 0VDC
voltage between H and COM, zone 1 switches off.
C.2 When the unit detects a 12VDC voltage between CL and COM, zone 2 switches on depending on the weather tempera-
ture curve. When the unit detects a 0VDC voltage between CL and COM, zone 2 switches off.
C.3 When HT-COM and CL-COM are detected as 0VDC, the unit switches off.
C.4 When HT-COM and CL-COM are detected as 12VDC, both zone 1 and zone 2 switch on.
CN21
CN5 CN28
CN32
CN29
CN25
CN42
CN40
DIS1
CN41
S3
S4
CN22
CN1
CN2
1 2 3 4 5 6 7 8 9 0 1
13 14 15 16 17 18 19 20 21
CN11
HT
Metodo C
Method C
(Double zone control) (Controllo due zone)
RT1
zone1
zona1
CN8
CN6
S1 S2
CN4
SW9
CN17
25 26 27 28
11 12
4 5 3
2 2 3 2 4 2 9 2 0 3
31 32
6 7 8 9 10
CN7 CN30
CL
COM
POWER SUPPLY POWER SUPPLY
INGRESSO
INGRESSO
RT2
ALIMENTAZIONE
ALIMENTAZIONE
INPUT INPUT
zone2
zona2
94
CN24
CN16
CN13
CN15
CN18
CN31
CN35
CN36
2 1