Calibration Of Thermal Relay - Riello RL 190/M Installation, Use And Maintenance Instructions

6.3

Calibration of thermal relay

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, 400V, the cursor should be po-
sitioned on "MIN".
• If the motor is delta-powered, 230V, the cursor should be po-
sitioned on "MAX".
Even if the scale of the thermal cut-out does not include rated mo-
tor absorption at 400V, protection is still ensured in any case.
NOTA
Burners leave 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 relay.
These burners are also fiitted for the continuous operation, if they
are equipped with the control box LANDIS type LOK 16.250 A27
(interchangeable with the burner control box LANDIS LAL 1.25).
Electrical system
WARNING
21
GB
D867
– Do not invert the neutral with the phase wire
in the electricity supply line. Any inversion
would cause a lockout due to firing failure.
– Only use original spare parts to replace the
components.
Fig. 23
20033337