Riello RL 70/M Instrucciones De Instalación, Funcionamiento Y Mantenimiento página 19

RWF
Key to Layout (Fig. 18) - (Fig. 19)
BT - Temperature probe
BP - Pressure probe
IN - Manual burner stop switch
MB - Terminal strip
RS - Remote lock-out reset button (if present)
S - Remote lock-out signal
TL - Limit control device system: this shuts down the burner
when the boiler temperature or pressure exceeds the set-
point value.
TR - High-low mode control device system: this controls oper-
ating stages 1 and 2 and
The TR load control is not required when the regulator
RWF is connected as its function is performed by the reg-
ulator RWF itself.
TS - Safety control device system: this operates when TL is
faulty.
The burner is factory set for two-stage operation
and the TR remote control device that commands
light oil valve V2 must therefore be connected.
WARNING
Alternatively, if single stage operation is required, instead of con-
trol device TR install a jumper lead between terminal 5 and 6 of
the terminal strip.
Electrical system
Calibration of thermal cut-out 17)(Fig. 1 page 7)
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
positioned 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 mo-
tor absorption at 400 V, protection is still ensured in any case.
NOTE:
Burners RL 70/M - RL 100/M - RL 130/M leave the factory pre-
set for 400 V power supply. If 230 V power supply is used,
change the motor connection from star to delta and change
the setting of the thermal cut-out as well.
The RL 70/M - RL 100/M - RL 130/M burners have been type-
approved for intermittent operation. This means they should
compulsorily be stopped at least once every 24 hours to en-
able the control box to perform checks of its own efficiency
at start-up. Burner halts are normally provided for automati-
cally by the boiler load control system. If this is not the case,
it is necessary to apply in series with IN a timer switch that
turns off the burner at least once every twenty-four hours.
WARNING
17 GB
20123877
D867
Do not invert the neutral with the phase in the
electrical supply line.
Fig. 19
Fig. 20
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