4
x
Set-up and installation
FA ROTEX A1 BOe - 02/2014
19
Switchboard PCB
Tab. 4-6 Legend for fig. 4-13
4.8.3 Connecting the temperature sensor
Instructions concerning temperature sensors
The ROTEX A1 BO can regulate the flow temperature, de-
pendent on the weather. For this function, you will need the ex-
ternal temperature sensor (
RoCon OT1,
15 60 70
).
The temperatures captured by the unit's internal temperature
sensors (flow and return flow temperature sensor, flue gas tem-
perature sensor) are used for the output control of the burner and
for fault detection. The temperature sensors are already factory-
connected and can be plugged directly to the respective sensor,
if they need to be swapped.
If a hot water storage tank is used, the connected storage tank
temperature sensor must be mounted at the suitable position in
the hot water storage tank (observe installation instructions for
the hot water storage tank).
To regulate a mixer circuit you will need the Mixer Module
(
RoCon M1,
15 70 68
), which includes the mixer circuit flow
temperature sensor.
External temperature sensor
Ɣ
Choose a location at about one third of the building height
(minimum distance from floor: 2 m) at the coldest side of the
building (North or North-East). Thereby, exclude the proximity
of external heat sources (chimney, air shafts) and direct
sunshine.
Ɣ
Place external temperature sensors in such a way that the
cable exit points face downwards (prevents humidity ingress).
Ɣ
Lay probe line and connect to the ROTEX A1 BO controller.
Ɣ
Connect the external temperature sensors with a dual core
cable (minimum cross section
1 mm
2
).
Storage tank temperature sensor
The storage tank temperature sensor is included in the scope of
supply of the connection kit A1 (
VSA1,
15 48 22
) or it can be
supplied separately as an accessory (
RoCon DT1,
15 60 68
).
Ɣ
Connect the sensor line to the sensor plug
J8
, connection
T
WW
(see fig. 4-13).
Fig. 4-13 Connection diagram of the circuit board connectors and cable
colours of the factory-installed connection cables (for legend
see tab. 4-6
Connections of the circuit board
connectors:
J2
3-way diverter valve or stor-
age tank charging pump P
L
*
J3
Spare
J6
Mains connection
J8
Sensors, switching contacts
J9
FlowSensor
J12 Spare
J13 CAN system bus
J14 - Circulation pump P
Z
J16 Room thermostat
Cable colours:
bl
blue
br
brown
ge
yellow
gn
green
n.a. Contact not assigned
*
3-Way diverter valve included in ac-
cessory VSA1 (
15 48 22).
The adapter cable (
E 1500430)
is needed for connecting a storage
tank charging pump.
CAUTION!
The use of non-approved temperature sensors or
ones which are not suited to the unit can lead to signif-
icant malfunctions in the regulation of the ROTEX
A1 BO and damage the unit's controller.
Ɣ
Use only the ROTEX temperature sensor available
as an accessory.
Additional information and a detailed description can be
found in the documentation "ROTEX Regulator RoCon
BF Controller"". It is included in the A1 BO scope of
supply.
CAUTION!
The parallel layout of sensor and power lines within a
single installation pipe can lead to significant malfunc-
tions in the regulation of the ROTEX A1 BO.
Ɣ
Always lay the sensor line separately.
