Unigas PBY1025, Manual Of Installation - Use - Maintenance

Page: 12 / 119

C.I.B. UNIGAS - M039126CE
12
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.
auxiliary contacts are provided (terminals no. 507 and no. 508 of the MA terminal block) to connect an interven-
tion system (alarm/power supply cutoff) in case of fault of the oil resistor contactor (see Fig. 4-Fig. 5).
Fig. 4
-
Progressive burners
Fig. 5 - Fully modulating burners
(#) Free contact for ”Faulty heater resistor contactor”
(**) Probes connection (see Fig. 6)
Probes connection
Fig. 6
Probes connection by means of the 7-pins plug (Fig. 7) - see Fig. 6 for con-
nections.
Fig. 7
MA
(#)
MA
(#)