Appendix; Electrical Connections - Riello RS 64 MZ Instrucciones De Instalación, Funcionamiento Y Mantenimiento

D867
NOTES
• The model RS 64 MZ three-phase leaves the factory with an electrical supply setting of 400V. If 230V power supply is used, change the
motor connection from star to delta and change the setting of the thermal cutout as well.
• The burners RS 64 MZ have been approved for intermittent operation. This means they should be compulsorily stopped at least once every
24 hours to enable the control box to perform a check of its own efficiency at start-up.
Normally, the stopping of the burner is guaranteed by the boiler's thermostat/pressure switch. 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.
• The burners RS 64 MZ leave the factory set for two-phase operation, so the thermostat/pressure switch TR must be connected.
If you want the burner to work with single-phase operation, insert (in place of the thermostat/pressure switch TR) a bridge between the ter-
minals T6 - T8 of the plug X4.
ATTENTION:
- Do not invert the neutral with the phase in the electrical supply line. An inversion would lead to lockout due to ignition
failure.
- Replace the components only with original spare parts.

APPENDIX

Electrical connections

NOTES
The electrical wirings must be carried out in conformity
with the regulations in force in the countries of destina-
tion, and by qualified personnel.
Riello S.p.A. cannot accept any responsibility for modifi-
cations or connections other than those shown in these
diagrams.
Use flexible cables, in accordance with the regulation EN 60 335-1.
All the cables to be connected to the burner must pass through
cable grommets.
The use of cable grommets can take various forms; the following
way is just one possible solution:
1- Pg 11
2- Pg 11
3- Pg 9
4- Pg 9
5- Pg 11
6- Pg 11
D3999
ADJUSTMENT OF THERMAL CUTOUT
Used to avoid the burning of the motor owing to a strong increase
in the absorption, caused by the lack of a phase.
• If the motor is star-driven, 400V, the cursor must be positioned
on "MIN".
• If it is delta-driven, 230V, the cursor is positioned on "MAX".
If the scale of the thermal cutout does not include the absorption of
rating of the motor at 400V, the protection is guaranteed anyway.
20
Three-phase power supply
Single-phase power supply
Remote control device TL
Remote control device TR or probe (RWF40)
Gas valves
Gas pressure switch or gas valve leak detection
control device