58
IT
MEGAPREX N 720N ÷ 1060N
cod. 3541O220 - Rev. 00 - 03/2018
Key to the symbols/components on the wiring diagram
2BU1
BM
2
Boiler burner
2HL1
QG
2
230 Vac panel power supply lamp
2HL2
QG
2
Safety thermostat operation alarm lamp
2SB1
QG
2
Main boiler ON switch
2SB2
QG
2
Burner ON switch
2TS1
QG
2
Boiler safety thermostat
2XT1
BM
2
230 Vac safety thermostat operation signal
3B1
BM
3
Boiler return temperature probe
3B3
BM
3
External probe
3N1
QG
3
MASTER (RSV 63 283/109) base control unit
3P1
BM
3
System pump
3P2
BM
3
Anti-condensation bypass pump
4B1
BM
4
Boiler feed water temperature sensor
4N1
QG
4
Siemens AVS37.294 user interface
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.
Содержание MEGAPREX N 720N
Страница 11: ...11 IT MEGAPREX N 720N 1060N cod 3541O220 Rev 00 03 2018 Schema dei collegamenti ...
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Страница 51: ...51 IT MEGAPREX N 720N 1060N cod 3541O220 Rev 00 03 2018 Connection diagram ...
Страница 71: ...71 IT MEGAPREX N 720N 1060N cod 3541O220 Rev 00 03 2018 Schéma de connexion ...
Страница 91: ...91 IT MEGAPREX N 720N 1060N cod 3541O220 Rev 00 03 2018 Схема подключения ...
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