15
FIG. 14a-14b
1. 5-pole low temperature control cable:
connect the 5-pole connector to the electronic system control board.
FIG. 15a-15b
2. High temperature pump control cable with prods:
connect the two prods to the boiler’s terminal board
FIG. 16a-16b
3. Screened signal cable with 2-pole connector:
connect the NTC sensor connector on the electronic system control board end;
connect the two prods for the low temperature high limit thermostat to the
boiler’s terminal board.
FIG. 17
Connect the shielded cable connector (on the Connect AT/BT LE part) to the NTC
(3) probe and the other 2 terminal clips to the 2 thermostats, jumpering them with
the jumper on the cable (fig. 18).
OPERATION IN CASE OF INTERVENTION OF THE HIGH LIMIT THERMOSTAT
WITH MANUAL RESET
The permanent signal of 77 flashing alarm (refer to the boiler instrucions) may be
caused by the intervention of the high limit thermostat manual reset.
Temperature intervention 63°C.
If the 77 alarm is permanent operate as follows:
FIG. 18
- Open the front cover of the Connect AT/BT LE
- Push the red button on the high limit thermostat manual reset positionned on
the flow pipe of the low temperature circuit
- Verify that the 77 signal desappears after a while
- Close the front cover of the Connect AT/BT LE.
If signal 77 is still displayed wait to the cooling of the system before a new unblock
of the high limit thermostat with manual reset .
CONNECTING THE CONNECT AT/BT LE TO THE ELECTRICITY MAINS
FIG. 19
Connect the Connect AT/BT LE unit to the electricity mains (phase/neutral/earth)
using the cable supplied.
Drawing the power supply for the Connect AT/BT LE 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 LE.
CONNECTING THE ROOM THERMOSTATS (TA)
FIG. 12a-12b
The TA for the high temperature system is directly connected to the boiler’s control
board as shown in the boiler’s instruction manual.
Indoor boilers only: The TA of the low temperature system is connected to terminal
M2A.
Outdoor boilers only: The TA of the low temperature system is connected to
terminal C4P.
CONNECTING THE EXTERNAL SENSOR
Connect the external sensor to the boiler as indicated in the instruction 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. Connect 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 60335-1 standards (contact opening at least 3,5mm, category III),
- use cables with a 1,5 mm
2
section and respect the L (Phase) – 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.
3 FIRST STARTING UP
4 CIRCULATION PUMPS
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.
Before switching the Connect AT/BT LE on, check that the electrical and hydraulic
connections have been formed correctly.
FIG. 17
During testing, the temperatures can be checked due to the two thermometers.
The Connect AT/BT LE is equipped with digitally controlled high efficiency elec-
tronic circulators. Below is a description of the main characteristics and the pro-
cedures to be carried out in order to set the required operation.
User interface
The user interface consists of a button (A), a two-colour LED red/green (B) and
four yellow LEDs (C) in a row
.
A
B
C
LED 1
LED 2
LED 3
LED 4
LED 5
The user interface allows the functions which are in operation to be displayed (op-
erating status, alarm status) and allows the circulator operating mode to be set.
The performance data, indicated by the LED (B) and (C), is always displayed
during normal operation of the circulator while the parameters are set by pressing
the button (A).
Indication of the operating status
When the circulator is operating, the LED (B) is green. The four yellow LEDs (C)
indicate the consumption of electrical energy (P1) as shown in the table below.
LED status
CIRCULATOR
status
Consumption in
% of
P1 MAX (*)
Green LED on +
1 yellow LED on
Operation at
minimum
0÷25
Green LED on +
2 yellow LEDs on
Operation at
minimum-average
25÷50
Green LED on +
3 yellow LEDs on
Operation at
average-maximum
50÷75
Green LED on +
4 yellow LEDs on
Operation at
maximum
100
(*) For the power (P1) absorbed by the individual circulator, please refer to the
information provided in the table “Technical data”.
Summary of Contents for CONNECT AT LE
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