Flowserve LRR1-40 TDS Control Unit - Manual (Page 23)

23
Operation
– co ntinu ed –
Stand-by operation
To avoid loss of water, the continuous blowdown control and the automatic boiler
blowdown (if activated) can be de-activated during stand-by operation or when the firing
is switched off. An external control command (see wiring diagram) triggers off the signal.
LED "Power" is illuminated.
The continuous blowdown valve is motored into the
CLOSED position.
LED 2 is flashing and LED 3 is illuminated during the
stand-by operation.
The MIN/MAX limit and the monitoring function remain active during stand-by operation.
After the equipment switches back to normal operation the continuous blowdown valve is
motored into the OPERATING position or the control position. In addition an intermittent
blowdown pulse is triggered off (provided that automatic intermittent boiler blowdown has
been activated and the pulse duration has been set).
24 hr purging pulse
Only applicable if the 24 hour purging pulse was activated:
To prevent blocking of the continuous blowdown valve a purging pulse is set off upon
application of the mains voltage.
LED "Power" is illuminated.
The continuous blowdown valve is operated and
opened for 2 minutes.
LED 3 is flashing.
Once the adjusted time has elapsed LED 3 goes out.
The continuous blowdown valve is then closed for
2 minutes, LED 2 is flashing.
Then the valve is motored into the OPERATING
position or into the required control position.
This process is repeated every 24 hours. During stand-by operation the time interval
continues without triggering off the purging pulse. Note that during the purging process
the MIN limit is not active.
Test
Test
Test