Riello RS 68/M BLU Manuel D'entretien page 46

Electrical connections
NOTES
The electrical wirings must be carried out in conformity with the regulations in force in the countries of destination, and by
qualified personnel. Riello S.p.A. cannot accept any responsibility for modifications or connections other than those shown
in these diagrams.
Use flexible cables according to EN 60 335-1 Regulations:
• if in PVC sheath, use at least HO5 VV-F;
• if in rubber sheath, use at least H05 RR-F.
The electrical connections of the burner are made by preparing the plug-socket, except for the engine cable, which should be
passed through the cable gland that is in the bracket. The following lists show one possible solution:
D7741
D867
NOTES
• Burner RS 68 - 120/M BLU leaves the factory preset for 400V power supply. 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 RS 68 - 120/M BLU 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 auto-
matically 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.
• The TR and TL load controls are not required when the RWF40 is connected, as their function is performed by the RWF40 itself.
MODULATING OPERATION
If the output power regulator kit RWF40 or the converter 0...10V / 4...20mA is connected, in 3-point signal, the thermostat/pressure TR must be
removed.
In addition, the function Q13 - Q14 of the regulator RWF40 can substitute the thermostat/pressure switch TL.
In this case, the thermostat/pressure switch TL connected to the X7 must be removed.
On the contrary, if you want to maintain the thermostat/pressure switch TL, it must be adjusted so as not to interfere with the working of the
regulator RWF40.
The thermal cutout k1 (RWF40) can be connected to the terminals:
- 2 - 3, to replace the remote control TL;
- AL - AL1, to control an alarm device.
ATTENZIONE:
- 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
RS 68 - 120/M BLU
1- Pg 13,5 Three-phase power supply
2- Pg 13,5 Gas valves
Pg 13,5 Gas pressure switch or gas valve leak detection
control device (socket XP6)
3- Pg 11 Single-phase power supply
Pg 11 Remote control device TL (socket XP7)
4- Pg 9 Remote control device TR or probe RWF40
(socket XP4)
5- Pg 11 Open the hole, if a pipe union is to be added
CALIBRATION OF THERMAL CUT-OUT
This is required to avoid motor burn-out in the event of a signifi-
cant increase in power absorption caused by a missing phase.
• If the motor is star-powered, 400 V, the cursor should be posi-
tioned to "MIN".
• If the motor is delta-powered, 230 V, the cursor should be
positioned to "MAX".
Even if the scale of the thermal cut-out does not include rated
motor absorption at 400 V, protection is still ensured in any case.
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