Nibe SMO 40 - Connections

Connections
NOTE
To prevent interference, unscreened commu-
nication and/or sensor cables to external con-
nections must not be laid closer than 20 cm
from high voltage cables.
POWER CONNECTION
SMO 40 must be installed via an isolator switch with a
minimum breaking gap of 3mm. Minimum cable area
must be sized according to the fuse rating used.
1N
L
X1
L N 1 1 0 2 3 4PE
1 2 3 4
LEK
X1
1 1N
L
0 432PE
TARIFF CONTROL
If there is a loss of voltage to the compressor in the heat
pump for a certain period, simultaneous blocking of this
must take place via a software-controlled input (AUX
input) in order to avoid alarms, see page 31.
CONNECTING THE CHARGE PUMP FOR THE
HEAT PUMP 1 AND 2
Connect circulation pump (EB101-GP12) to terminal
block X4:5 (PE), X4:6 (N) and X4:7 (230 V) on the base
board (AA2) as illustrated.
Control signal for (EB101-GP12) is connected to terminal
block X4:7 (GND) and X4:8 (PWM) on the input board
(AA3) as illustrated.
If two heat pumps are connected to SMO 40, the circu-
lation pump (EB102-GP12) must be connected to termin-
al block X4:12 (PE), X4:13 (N) and X4:15 (230 V) on the
base board (AA2) as illustrated. Control signal for (EB102-
GP12) is then connected to terminal block X4:5 (GND)
and X4:6 (PWM) on the input board (AA3) as illustrated.
TIP
Two charge pumps (four if the internal access-
ory board is used) can be connected to and
controlled by SMO 40. Several charge pumps
can be connected if accessory boards (AXC)
are used, two pumps per board.
987654
SMO
E
xternt
PE
L
N
External
SMO40
AA2-X4
EB101-GP12
L N 1 1 0 2 3 4PE
1 2 3 4
LEK
1
2
3
4
AA2-X4
161514131211
SMO
E
xternt
PE
L
N
External
SMO40
AA2-X4
EB102-GP12
5678910
SMO
E
xternt
External
SMO40
AA3-X4
EB101-GP12
L N 1 1 0 2 3 4PE
1 2 3 4
LEK
AA3-X4
345678
SMO
E
xternt
External
SMO40
AA3-X4
EB102-GP12
NIBE SMO 40Chapter 5 | Electrical connections22