Installation 5
0020265768_01 eloBLOCK Installation and maintenance instructions
11
5.3.4
Connecting the control and external
components
X40
X14
X15
X2
ESC
X30
X7
X41
X17
X16
X4
eBus
GND
RT24
GND
Limiter
GND
RCCPS
OUTDOOR SENSOR
syst temp
DCF77
GND GND
Tank Sensor
GND
Aquastat
SPEED1
SPEED2
PE
N
L
PE
N
LA
LB
2
1
3
4
6
5
7
1
Outdoor temperature
sensor connection, X41
2
Room temperature
control connection, X17
(RT24, GND)
3
Connection for the on-
site load-shedding relay
contact, X17 (Limiter,
GND)
–
limiter
4
NTC sensor connection
(domestic hot water
cylinder), X16 (Tank
Sensor, GND)
–
use the
accessories kit
5
Thermostat connection
(domestic hot water
cylinder), X16 (GND,
Aquastat)
–
use the
accessories kit
6
X4 cascade system
connection
7
Connection for the
domestic hot water
cylinder or external
signal transmitter, X15
1.
Observe the documentation for the relevant component.
2.
Route the connection cables for the components to be
connected through the grommets on the left or right of
the underside of the product. (
→
Page 5)
3.
Strip approx. 2 -3 cm of the relevant connection cable
and strip the insulation from the conductors.
4.
Connect the connection cable to the relevant screw
terminals. (
→
Page 24)
5.
Ensure that the connection cable is mechanically fixed
in place in the screw terminals.
5.3.5
Connecting the load-shedding relay
An external load-shedding relay can control the product's
power, depending on the mains load in the building.
If the mains supply is under an excessive load, the product's
power automatically decreases.
▶
Connect the on-site load-shedding relay to the output
limiter connection at contact X17.
5.3.6
Connecting an external signaller
If no domestic hot water cylinder is connected, you can con-
nect an external signal transmitter for indicating faults with
the product to plug connection X15.
Condition
: No domestic hot water cylinder connected
▶
Connect an external signal transmitter via a screw ter-
minal (AKZ 950/3 or similar) to connections
LA
and
N
on
plug connection X15 (
→
Page 24).
▶
Set parameter
d.26
to the value
6
.
◁
If there is a fault
F.xx
with the product, the signal is
triggered.
5.3.7
Connecting an external pump
▶
Use the original accessory kit or connect the external
pump cable to connection X15.
5.3.8
Setting up a cascade system
1
2
3
1
Filter
2
Stop cock
3
Non-return valve
If a product's power cannot offset the heat loss in the build-
ing, connect an additional product from the series that has
24 kW or 28 kW.
▶
Connect the connections for screw terminal X4 on the
product that is to be controlled to connections RT24 and
GND for screw terminal X17 on the additional product.
▶
If the cascade system is controlled by a room temperat-
ure control, you must also connect the room temperat-
ure control's control line to connections RT24 and GND
for screw terminal X17 on the product that is to be con-
trolled.
