Installation and Operating Instructions
BDC 102
1328BED001-10B-E
Status 01/07
- 7 -
6 E
L E C T R I C AL C O N N E C T I O N
You must observe the safety instructions in chapter 1
Do not carry out wiring work when the device is connected to
the electricity supply!
6.1 230V connection
The control unit is supplied with electricity as soon as it is connected to the mains supply. The
pump is connected using a terminal screw on the control unit.
The device must be opened in order for it to be wired up.
6.2 Connection of temperature sensor
The BDC 102 operates with accurate platinum temperature sensors of type PT1000.
The terminal screws for the temperature sensors allow simple attachment.
Installation/wiring of temperature sensor:
Install the sensors at the requisite places
on the collector (T1) and the storage
cylinder (T2). In so doing, ensure good
temperature
transmission
and,
if
necessary, use a thermally conductive
paste.
Attach the cable to the control unit. The
cables of the temperature sensors can
be extended. For lengths up to 15 m, a
cross-section of 2 x 0.5 mm² is required;
for lengths up to 50 m, a cross-section of
2 x 0.75 mm² is necessary. For lengths
exceeding 10 meters, a shielded cable is
recommended. Sensor cables must not
be laid parallel to 230 Volt power cables
as these can cause faults.
To protect the collector sensor within the
control unit, the use of a lightning
protection
device
(accessories)
is
recommended.
Connect the collector sensor to the
terminals labelled T1. There is no need
to observe a particular polarity (see page
6, figure 2).
Connect the storage cylinder sensor to
the terminals labelled T2. There is no
need to observe a particular polarity (see
page 6, figure 2).
6.3 Replacing the fuse
The device is protected against overload
and short circuit by means of a switching
output with a fine-wire fuse. The fuse is
located in the top left part of the casing in
the green mount.
If the fuse is defective, e.g. if none of the
lights glow when the control unit is
connected - you can replace the fuse with
an identical one.
Only prescribed fuse types may be used:
fine-wire fuse 5 mm x 20 mm 2A/T (2A current, surge-proof version)
