Electrical Connections And Wiring Diagram - Danfoss EPU 2370 Instructions Manual

Electrical connections and
wiring diagram
Connection to 230 VAC -
(terminals 13-24)
The control must be connected using the
terminal strips with screw terminals.
Up to 3 x 1.5 mm² or corresponding
wires can be connected in each
terminal. The terminal strips are coded
to prevent terminal strips with mains
voltage being connected to sensor
terminals.
Neutral (N) - 230 V~
Phase (L) - 230 V~
Reversible gear motor 230 V~, AMB, AMV etc.
Relay output R1 - 230 V~ (NC)
Relay output R2 - 230 V~ (NC)
Connections for sensors, etc. -
safety voltage (terminals 1 - 12)
Sensor mounting is described in the
instructions enclosed with the product.
S1 flow/duct (PI circuit)
storage tank upper sensor
S2
room sensor (P circuit)
S3 frost protection sensor
S4 return temperature sensor
S5 external setpoint
storage tank lower sensor
S6
compensation sensor
External time switch/override
Communication BUS
Note!
Wire resistance can give measurement
error. A resistance of 4 ohm
BC-HM
Wire cross-section: min. 0.4 mm²
Total length of all sensor and BUS
wires: max. 150 metres.
corresponds to a temperature increase
of about 1 degree.
VI.72.M4.02 © Danfoss 11/97
Terminal
13
14
16 (close) 8(2)A 250V~
17 (open) 8(2)A 250V~
21 - 22 8(2)A 250V~
23 - 24 8(2)A 250V~
Type
ESMA/B/C/U
ESMB/U
ESMR
ESMB/U/T
ESMA/B/C/U
ESME
ESMB/U
ESMR/T
ECA 9010
Load
Terminal
10 - 11
7 - 9
11 - 12
4 - 6
4 - 5
8 - 9
3 - 4
1 - 2
5