26
Normal operation
LED “Power” is illuminated.
LEDs 1-4 not illuminated
Operation
Continuous boiler blowdown
LED 2 is flashing while the continuous blowdown
valve is closing.
LED 3 is flashing while the valve is opening.
Note
LEDs 2 and 3 go out once the valve position dictated by continuous blowdown control is
reached.
If a CAN open actuator is controlled the LEDs 2 and 3 are not flashing/illuminated.
Note
LED 4 is not lit during the adjusted interval between intermitttent boiler blowdowns.
Relay contact 4 is open, the intermittent blowdown valve is closed.
The interval between the intermittent blowdown pulses can be set between 1 and 120 h
(intermittent blowdown interval).
The
duration of the intermittent blowdown
can be
set between 1 and 60 s. For larger boilers it may be necessary to repeat the intermittent
blowdown pulses. The
intermittent blowdown pulses
can be repeated up to 5 times
within 5 - 30 seconds
(pulse interval)
. Parameters can only be set via the operating unit
URB / SPECTOR
control
.
Intermittent boiler blowdown
Only applicable if Automatic Intermittent Blowdown Control was activated:
When the mains voltages is switched on the adjusted interval between the blowdown pulses (blow-
down interval) is started.
If a blowdown pulse is triggered,
LED 4 is illuminated during the pulse time and
relay contact 4 closes.
The intermittent blowdown valve opens.
1
2
3
4
Test
P
1
2
3
E
4
µS
ppm
GESTRA
LRR 1-40
1
2
3
4
Test
P
1
2
3
E
4
µS
ppm
GESTRA
LRR 1-40
1
2
3
4
Test
P
1
2
3
E
4
µS
ppm
GESTRA
LRR 1-40
