GESTRA LRR 1-50, Инструкция по установке и эксплуатации

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23
Operation, alarm and test
Conductivity controller LRR 1-50, LRR 1-51:
Indications and checking the functions of the MAX output contacts
Note
The continuous blowdown valve is equipped with three limit switches for the positions
OPEN, CLOSED and OPERATING. In the adjustable OPERATING position the continuous
blowdown valve is somewhat open. A certain amount of boiler blowdown is discharged
from the boiler in order to keep the TDS (= total dissolved solids) level below the limit. The
amount of boiler blowdown can be ascertained by means of the capacity charts for the
continuous blowdown valve. Please observe the installation instructions of the GESTRA
continuous blowdown valve.
Operation
Activity Display Function
Actual value < setpoint
The actual value is shown on the
seven-segment display.
LED 2 (indicating "Valve closes") is
flashing, MAX LED is not illuminated.
Valve output contact 19/17 closed. MAX output
contacts 21/23 open, 22/23 closed.
Testing MIN alarm and MAX alarm
Activity Display Function
During operation:
Actual value < setpoint
Select parameter Test. Press
and hold down push-button.
Seven-segment display: Test
is flashing
MAX LED is illuminated red for
3 sec.
MAX output contact 21/23 closed, 22/23 open.
After 3 sec.:
MAX LED is not illuminated.
MAX output contact 21/23 open, 22/23 closed.
Test finished, release push-
button. Seven-segment display:
Test is indicated.
Note: If you continue to hold down the push-button, a new test is started. You can
abort the test any moment by releasing the push-button.
Turn the rotary button until the actual value is shown.
If no operation is performed the actual value will be indicated automatically after 30 sec.
Setpoint exceeded
Actual value > setpoint
The actual value is shown on the
seven-segment display.
1. LED 1 (indicating "Valve opens")
is flashing
2. LED 2 (indicating "Valve closes") is
flashing, MAX LED is not illuminated.
The continuous blowdown valve opens. Once
the conductivity has fallen below the adjusted
hysteresis HySt, the valve is motored into the
OPERATING position.
1. Valve output contact 19/16 closed,
2. Valve output contact 19/17 closed,
MAX output contact 21/23 open, 22/23 closed.
MAX alarm
Switchpoint "MAX con-
ductivity" exceeded.
MAX LED illuminated red MAX output contact 21/23 closed, 22/23 open.
Stand-by operation
Burner is switched off (stand-by operation).
Supply voltage for conductivity controller is also switched off.
When the system is switched on again a re-start is carried out.
See page 18.
Valve output contact 19/18 closed,
Continuous blowdown valve closes.