Nederman FlexPAK 800, Setting Manual

FlexPAK 800/1000

37

EN

If there are multiple indicator lamps connected to the system, it is recommended that 

semiconductor LED indicators used.

7 

Pneumatic filter cleaning valve

7.1 

Filter cleaning button

The filter cleaning button will only work when the system is in Standby mode or Running 

mode.

7.2 

Filter cleaning in Standby mode

Perform a filter cleaning in Standby mode as follows:

1. 

From Off mode, put the unit into Standby mode by pressing the Standby/Running 

button.

2. 

Start filter cleaning by pressing the filter cleaning button.

The unit goes into Running mode, the motor starts and the FCV closes and vacuum is 

established in the system. The unit will now open and close the FCV once and then leave 

the FCV in its open position. After the cleaning cycle, the unit goes into Idling mode. The 

unit waits for a pilot signal for 10 minutes. If the pilot signal is not received during this time, 

the unit will stop its motor and go into Standby mode.
To perform a new filter cleaning in Idling mode, activate the pilot signal and enter Running 

mode, or toggle the Standby/Running button to go to Standby mode and press the filter 

cleaning button again.

7.3 

Filter cleaning in Running mode

Perform filter cleaning in Running mode as follows:

1. 

Put the system into Standby mode by pressing the Standby/Running button.

2. 

Activate the pilot signal by connecting terminals X1:13 and X1:14 with a jumper. 

The unit goes into Running mode. The motor starts, the FCV closes and pressure is 

established in the system.

3. 

Start the filter cleaning by pressing the filter cleaning button.

The unit will now open and close the FCV 3 times and then leave the FCV in its closed 

position. After the last cleaning cycle, the unit returns to Running mode and waits for the 

pilot signal to stop. It is possible to perform multiple filter cleaning cycles in Running mode.
When the pilot signal stops, the unit runs for 10 seconds (DIR time) and then opens the FCV 

and goes into idling mode. The unit waits for a pilot signal for 12 minutes. If the pilot signal 

is not received during this time, the unit will stop the motor and go into Standby mode.
The idling time is set by the SSR timer and default is 12 minutes. DIR time is the delay after 

the pilot signal has stopped before opening the FCV. The default is 10 seconds.

7.4 

Filter cleaning valve function

The PLC output DO3 is set and sends +24 V to the solenoid valve. The solenoid valve opens 

the air flow to the pneumatic piston, which moves the lid on top of the filter upwards 

letting in air with atmospheric pressure to the filter top. This sudden opening of the lid on 

the top lets in air with great speed which creates a sudden pressure rise above the filters. 

The pressure increase blows air through the filter bags removing the dust from the filters.
When power to the solenoid valve disappears, the valve closes and evacuates the 

pneumatic piston. The lid falls down and closes the opening of the filter top.