A375:
Terminal
Sensor / description
Type
(recomm.)
29 and 30
S1 Outdoor temperature sensor* ESMT
28 and 30
S2 A375.3 only:
Return temperature sensor,
circuit 2
ESM-11 / ESMB /
ESMC / ESMU
27 and 30
S3 Boiler temperature sensor**,
circuit 1
ESMU / ESMB
26 and 30
S4 A375.3 only:
Flow temperature sensor**,
circuit 2
ESM-11 / ESMB /
ESMC / ESMU
25 and 30
S5 Return temperature sensor,
circuit 1
ESM-11 / ESMB /
ESMC / ESMU
24 and 30
S6 A375.2 / A375.3 only:
DHW tank temperature sensor,
circuit 2 / 3
ESM-11 / ESMB /
ESMC / ESMU
23 and 30
S7 Room temperature sensor***,
circuit 1
ESM-10
22 and 30
S8 A375.3 only:
Room temperature sensor***,
circuit 2
ESM-10
20 and 30 S10 Voltage signal (0–10 V) for
external control of desired
boiler temperature, circuit 1.
*
If the outdoor temperature sensor is not connected or the
cable is short-circuited, the controller assumes that the
outdoor temperature is 0 (zero) °C.
**
The boiler / flow temperature sensor must always be
connected in order to have the desired functionality. If the
sensor is not connected or the cable is short-circuited, the
motorized control valve closes (safety function).
***
Only for room temperature sensor connection. The room
temperature signal can also be available from a Remote
Control Unit (ECA 30 / 31). See 'Electrical connections, ECA
30 / 31'.
Factory established jumper:
30 to common terminal.
A375 only:
Connection of voltage signal (0–10 V) for external control of
desired boiler temperature
VI.GU.L2.02
© Danfoss | 2017.09 | 71
Operating Guide ECL Comfort 210/296/310, application A275/A375