18
Appendix
1
2
4
3
4
B
3
4
4
4
A
F
E
D C
D3942
Electrical connections
Use flexible cables according to EN 60 335-1 Regulations.
All the wires to connect to the burner must enter through
the supplied fairleads.
The fairleads and hole press-outs can be used in various
ways; the following lists show one possible solution:
1 - Three-phase power supply
2 - Single-phase power supply
3 - Triggering / Safety devices
4 - Available
Cable grommets used in the factory:
A - Fan motor
B - Servomotor
C - Pump motor
D - Safety solenoid
E - 1
st
stage solenoid valve
F - 2
nd
stage solenoid valve
NOTES
The RL 250 MZ burner has been type- approved for intermittent operation. This means it shoulds compulsorily be stopped at least once every
24 hours to enable the control box to perform checks of its own efficiency at start-up. Burner halts are normally provided for automatically by the
boiler load control system.
If this is not the case, a time switch should be fitted in series to IN to provide for burner shut-down at least once every 24 hours.
Wiring must be performed by qualified personnel in accordance with the regulations in force in the country of destination.
Riello S.p.a. declines all responsibility for changes or wiring performed in any way other than that illustrated in these diagrams.
WARNING
Do not invert the neutral with the phase wire in the electricity supply line.
Layout of electric panel board
1
2
4
5
CONTENTS
References layout
RMO 88... operational layout
Electrical connections set by installer
3
RMO 88... operational layout
2
References layout
N. Page
/ 1 . A 1
Coordinates
