Notes About The Connections; Commissioning; Preliminary Checks - Lamborghini Caloreclima MEGAPREX N 720N Instructions D'utilisation

Key to the symbols/components on the wiring diagram
2BU1
BM Boiler burner
2
2HL1
QG 230 Vac panel power supply lamp
2
2HL2
QG Safety thermostat operation alarm lamp
2
2SB1
QG Main boiler ON switch
2
2SB2
QG Burner ON switch
2
2TS1
QG Boiler safety thermostat
2
2XT1
BM 230 Vac safety thermostat operation signal
2

6.3 Notes about the connections

The panel power cable, type FG7 RN-F 3G1.5, is already connected to the terminal block as standard equipment. In the event of replacement,
be sure to use a suitable cable in accordance with current legislation. The power supply to the burner is taken directly from the terminal block, if
single-phase and with a maximum current input of 3 A. The power supply to the system water circulator is taken directly from the terminal block,
if single-phase and with a maximum current input of 3 A. If the current input of the burner or pump is higher than envisaged, or the power supply
is three-phase, power relays must be connected to the outputs on the terminal block.
The remote start enabling signal makes it possible to start the boiler remotely. This is jumpered if not used. The external boiler safety enabling
signal makes it possible to insert a further contact that turns off the burner. This is jumpered if not used. The contact for the room thermostat
only acts on the water circulator. This is jumpered if not used.
7.

COMMISSIONING

7.1 Preliminary checks

Once the hydraulic, electrical and fuel connections to the boiler have been made, the following must be verified before starting the boiler:
- The expansion vessel and safety valve are properly connected and cannot be blocked in any way.
- The bulbs for the control and minimum safety thermostats and thermometer have been secured in the corresponding sheaths.
- The turbulators have been positioned in all the flues.
- The system is filled with water and completely vented of air.
- The pump or pumps are operating correctly.
- The hydraulic, electrical, safety device, and fuel connections have been performed in accordance with current local and national legislation.
- The burner has been installed according to the instructions in the manufacturer's manual.
- The mains voltage and frequency are compatible with the burner and the boiler's electrical equipment.
- The system is able to absorb the amount of heat that will be produced.
- The recirculation pump is installed as described in section 5.5.5.
IT
58
MEGAPREX N 720N ÷ 1060N
cod. 3541O220 - Rev. 00 - 03/2018
3B1
BM Boiler return temperature probe
3
3B3
BM External probe
3
3N1
QG MASTER (RSV 63 283/109) base control unit
3
3P1
BM System pump
3
3P2
BM Anti-condensation bypass pump
3
4B1
BM Boiler feed water temperature sensor
4
4N1
QG Siemens AVS37.294 user interface
4