Optional accessories, installation and use
1
Operating mode display
2, 3 Setting keys for adjustment and configuration
Figure 7.11: Local adjustment of the purge air monitoring
The green LEDs show the current rate of flow (the LEDs 0 to 9 represent the
range between zero flow and the set maximum rate of flow).
An LED that is lit indicated the position of the switching point.
This means:
orange = relay output closed* (rate of flow present),
red
= relay output open* (no rate of flow present).
*(relay R5 supply unit, see Table 6.3: Terminal assignment from page 57)
Commissioning and adjustment
Switch on the power supply
>
all LEDs light up and go out again step by step. During this time the
output is closed. This means that the purge air monitoring unit is in
operating mode.
Allow the normal flow through the equipment
Check the display and determine any further actions
Legends
LED OFF
1
The presetting is suitable for monitoring
>
No further adjustments are necessary.
LED lights up
green
LED lights up
orange
2
Normal flow rate is less than the representation
range of the display (LED lights up: res)
2 Adjustment options:
>
Change the switching point
>
Adjust the normal rate of flow
LED lights up
red
LED flashes
3
Normal flow rate is less than the representation
range of the display (LED lights up:
>
Adjust the with normal flow rate
Table 7.1: LED display for the purge air monitoring unit
You can restore the factory settings at any time (see page 77).
Adjusting the rate of flow
(adjusting the normal rate of flow)
The purge air monitoring unit specifies the existing rate of flow as the normal
rate of flow and adjusts the display representation to it automatically (all LEDs
apart from the switching point LED light up green).
The purge air monitoring unit is already factory-set to the normal rate of flow
(without pressure differential, i.e. pressure differential = 0 !).
Allow the normal flow rate through the equipment
Press the key and keep it pressed (Figure 7.11 (3)).
>
LED 9 lights up, and after approx. 5 s it starts to flash.
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