Unigas PN510, Manual Of Installation - Use - Maintenance, Page: 10 / 48

C.I.B. UNIGAS - M039196CC
10
Electrical connections
To execute the electrical connections, proceed as follows:
1 remove the cover from the electrical board, unscrewing the fixing screws;
2 execute the electrical connections to the supply terminal board as shown in the following diagrams,
3 check the direction of the fan-pump motor (see next pargraph)
4 refit the panel cover.
Respect the basic safety rules. Make sure of the connection to the earthing system. do not reverse the phase and
neutral connections. Fit a differential thermal magnet switch adequate for connection to the mains.
ATTENTION: 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 burner is provided with an electrical bridge between terminals 6 and 7; when connecting the
high/low flame thermostat, remove this bridge before connecting the thermostat.
IMPORTANT: Connecting electrical supply wires to the burner teminal block MA, be sure that the ground wire is
longer than phase and neutral ones.
CAUTION: auxiliary contacts are provided (terminals no. 507 and no. 508 of the MA terminal block) to connect an
intervention system (alarm/power supply cutoff) in case of fault of the oil resistor contactor (see Fig. 1-Fig. 2).
Fig. 1
-
Progressive burners
Fig. 2 - Fully modulating burners
(#) Free contact for ”Faulty heater resistor contactor”
(**) Probes connection (see Fig. 3)
Probes connection
Fig. 3
Probes connection oby means of the 7-pins plug (Fig. 4) - see Fig. 3 for
connections.
Fig. 4
MA
MA