Unigas C70N US, Manual Of Installation - Use - Maintenance

PART III: INSTALLATION

22

ELECTRICAL CONNECTIONS

Note on electrical supply 

In the case where the power supply of the AUXILIARIES of the phase-phase burner (without a neutral), for the flame detection it is ne-
cessary to connect the RC circuit Siemens between the terminal 2 (terminal X3-04-4 in case of LMV2x, LMV3x, LMV5x, LME7x) of the 
base and the earth terminal, RC466890660. For LMV5 control box,  please refer to the clabeling recommendations avaible on the Sie-
mens CD  attached to the burner

Any cable connection or hook-up to the grid must be carried out by qualified, informed and trained personnel, directly coor-
dinated and authorized by Technical Service. Always check in advance that the system electrical interlock is fitted with a 
safety circuit breaker.The installation must be built in accordance with the regulations in force and comply with basic safety 
rules.
See the wiring diagram for more information.

WARNING: 

It is possible that some components are still live despite being disconnected from the mains and can cause

electric shocks.

WARNING: 

! before executing the electrical connections, pay attention to turn the plant’s switch to OFF and be sure that the

burner’s main switch is in 0 position (OFF) too. Read carefully the chapter “WARNINGS”, and the “Electrical connections”
section.

WARNING:

The implant must have / in the implant there must be:



Have earthing connected to the burner; always check the connection, functionality and health and safety compliance of
the earthing cable beforehand. If in doubt, request a thorough check by qualified technical personnel.



Do not use foreign masses (e.g. fuel lines, metal structures...) to connect the burner to earth.



When connecting the power wires to the burner's MA terminal block, ensure that the earth wire is longer than the phase
and neutral wires.



Do not reverse the phase and neutral connections.



Provide an omnipolar switch-disconnector and a residual current circuit breaker, circuit breaker or fuses on the electrical
supply line to the burner.



Always check the protection of the mains system against overcurrents and electromagnetic interference as a preventive
measure.



Check that the voltage for which the system and the burner motors are designed corresponds to the mains voltage (+/-
10%).



Before carrying out any work on the machine's electrical panel, open the system's omnipolar switch disconnector and
turn the switch on the burner's electrical panel OFF.

In any case:



Provide adequately protected and safe mains supply and mains/burner tracing cables, with flame-proof electric cable of a
cross-section suitable for the installed power;



Absolutely avoid the use of extension cords, adapters or power strips;

LMV2/3... - LMV5...

M

Key

C - Capacitor (22 nF , 250 V)
LME / LMV - Siemens control box
R - Resistor (1 M

Ω

)

M: Terminal 2 (LGB, LME), Terminal X3-04-4 ( LMV2x, LMV3x, 
LMV5, LME7x)
RC466890660 - RC Siemens filter