7 Electrical connection
X61 Differential pressure gauge
optional
X6 Spare
X21 Safety chain 230 V AC (EMERGENCY OFF
switch, if necessary connect through pressure
sensor,...in series)
X28 External boiler request
X29 Fault
X51 External request (optional)
X54 External bus line; connection for RS-485 elec-
tronic modules
X55 External bus line; connection for CAN bus elec-
tronic modules
7.2.1 Connect heating circuit pump(X9, X10)
►
Connect heating circuit pump 1 to power section
connector
X9
, connect heating circuit pump 2 to
X10
.
►
If required (e.g. for underfloor heating), connect a
limiting thermostat (art. 61612).
►
If no limiting thermostat is used, the contact must
be bridged.
7.2.2 Pellet conveyor system (X14)
Extraction system direct extraction auger
►
Connect the motor of the screw conveyor to
power unit X14, use cable 5x1.5 mm
2
.
5-pin connector, direct
extraction motor
Terminal
X14
on the power element
PE
PE (1)
N
N (2)
L3
L (3)
L2
TK(4)
L1
TK (5)
OEM system
Use e.g. for pellet box transfer unit auger and for the
pellet mole
(these systems have a motor–thermal pro-
tection is integrated).
►
Bridge the two TK terminals on the boiler power
element.
►
Use 3 x1.5 mm² cable
7.2.3 External boiler request (X28)
Potential-free Relay output for switching an external
boiler, for example, an external boiler is controlled by
the SOLARFOCUS boiler control.
!
CAUTION
– The connection is floating and
has a maximum load of 5 A.
24
Installation manual
ecotop-zero, ecotop-light