Table of Contents
Advertisement
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 RL 38-50/M leave the factory preset for 400V power sup-
ply.
If 230V power supply is used, change the motor connection from
star to delta and change the setting of the thermal cutout.
The burners are also fitted for continuous operation, if they are
equipped with control box LANDIS type LOK 16.250 A27 (inter-
changeable 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. 19
20033316
Advertisement
Table of Contents
