Beretta CONNECT AT/BT Manuel D'instruction page 45

INSTRUCTION TO RESET THE MANUAL HIGH LIMIT
THERMOSTAT INTERVENTION
The permanent signal of 77 flashing alarm (refer to the boiler
i nstrucions) may be caused by the manual high limit
thermostat intervention.
T. intervention 63°C.
If the 77 alarm is permanent operate as follows:
- open the front cover of the Connect
- push the red button on the thermostat positionned on the
pipe
- verify tha the 77 signal desappears after a while- c l o s e
the front cover of the Connect
If signal 77 is still displaied wait to the cooling of the system
before a new attempt the unlock.
CONNECTING THE CONNECT AT/BT TO THE ELECTRICITY
MAINS
Connect the Connect AT/BT unit to the electricity mains (phase /
neutral / earth) using the cable supplied.
Drawing the power supply for the Connect AT/BT from the
boiler is absolutely forbidden as the boiler's fuse is not sized
to take the electrical loads associated with the Connect AT/BT.
CONNECTING THE AMBIENT THERMOSTAT (TA)
The TA for the low temperature system must be connected to termi-
nal M2A as shown in figure 10.
The TA for the high temperature system is connected directly to the
boiler's board, as per the instructions given in the boiler manual.
CONNECTING THE EXTERNAL SENSOR
Connect the external sensor to the boiler as indicated in the in-
struction manual for the boiler.
When using a phase-phase power supply, use a tester to
determine which of the two wires has the greater potential
compared to the earth and connect it to the L terminal. Con-
nect the remaining wire to the N terminal.
For floating power supplies, that is, those that have no earth
connection, an insulation transformer must be used, with a
secondary unit connected to the earth.
The following are obligatory:
- A multi-pole trip-switch must be used to disconnect the line,
that conforms to the CEI-EN standards (contact opening at
least 3 mm).
- Use cables with a 1,5 mm 2 section and respect the L (Phase)
Fig. 9
M2A
Fig. 10
– N (Neutral) connection.
- The amperage on the switch must be adequate for the
boiler's electrical power rating – see the technical data to
check the electrical power rating for the model installed.
- Connect the equipment to an efficient earthing system.
- The power socket must be inaccessible after installation.
The use of gas or water pipes to earth this equipment is
forbidden.
The manufacturer does not accept any responsibility for
any damage caused due to the lack of a proper earth or
failure to comply with the wiring diagram.
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