TERMINAL BLOCK M3
Terminal 1-2: (230Vac - max 1A) power supply of modulating boiler pump (PWM)
Terminal 2-3: (max 1A) power supply of non-modulating boiler pump (ON - OFF)
Terminal 4: not used
Terminal 5-6: PWM signal of the modulating pump
Terminal 7-8: not used
Terminal 9 - 10: Domestic Hot Water tank pump
Terminal 11 - 12: Heating System pump (device connected downstream of the hydraulic separator)
If the appliance is connected to an underfloor system, install a limit thermostat to prevent the latter from overheating.
Use the relative cable grommets at the bottom of the boiler to thread the cables through to the terminal blocks.
A 250Vac/250Vac relay with a minimum current rating of 16A and able to withstand a starting current of above 100A is
required to connect the external pumps.
11.1 CONNECTING THE ROOM THERMOSTAT
The connections in terminal block M1 are high voltage (230 V). Before making connections, make sure the appliance is
disconnected from the power supply. Respect polarity L (LIVE) - N (NEUTRAL).
To connect the Room Thermostat to the boiler, proceed as described below:
• Switch off the boiler;
• Access the terminal block M1;
• Remove the jumper from the ends of contacts 1-2 and connect the wires
of the volt free Room Thermostat;
• Switch on the boiler and make sure the Room Thermostat works correctly.
11.2 ACCESSORIES NOT INCLUDED IN THE SUPPLY
11.2.1 REMOTE CONTROL
The wire (1) from the boiler terminal block M2 powers the display backlighting (12 V). It is not necessary to connect this wire to
make the Remote Control work.
To operate the boiler with the Remote Control mounted on the wall, purchase accessory A supplied with the base A1. Also see
the mounting and operation instructions supplied with the kit A. Proceed as follows:
• Switch off the boiler.
• Pass the three wires from the boiler terminal block M2 through the hole in the base A1 to apply to the wall.
• Connect wires 1-2-3 of the boiler terminal block M2 to terminals (1)-(2)-(3) of the base terminal block A1 respectively.
• Fix the base A1 to the wall using the expansion grips and screws supplied with the accessory.
• Apply the Control Panel A to the base fixed to the wall, taking care not to apply excessive force.
• Power the boiler making sure that the Remote Control lights up.
A
Control Panel
A
B
Led interface accessory
(1)
Display backlighting +12V
7690785.01 (2-07/18)
A - A1
A1
A1
Base for wall-mounted Control Panel
B1
Base for Led interface accessory
(2)
Earth connection
Min. 200 mm
A1
A
B
34
1500mm
B
A1
B1
(3)
Power input/Signal +12V
A
B1