Increasing The Dosing Flow Manually; Reducing The Dosing Flow Manually; Engaging The Servomotor; Disengaging The Servo Motor - Grundfos Vaccuperm VGS-141 Montage- Und Betriebsanleitung

6.2 Increasing the dosing flow manually

• Open the flap
• Turn hand wheel slowly to the right
• Close the flap
Fig. 32 Adjusting the dosing flow

6.3 Reducing the dosing flow manually

• Open the flap
• Turn hand wheel slowly to the left
• Close the flap
Fig. 33 Decreasing the dosing flow

6.4 Engaging the servomotor

• Open the flap
• Turn the hand wheel as far as it will go to the left.
• Push the hand wheel upwards, whilst slowly turning to the
right, until it locks into place.
• The servomotor is now connected to the regulating valve and
the hand wheel is blocked.
• Close the flap
Fig. 34 Automatic adjusting of the dosing flow

6.5 Disengaging the servo motor

• Open the flap
• Push the hand wheel downwards and the servomotor will
disengage.
• Now the dosing flow can be adjusted by hand
• Servomotor is disconnected from rate valve
• Close the flap
Fig. 35 Manual adjusting of the dosing flow
22

6.6 Operating the servomotor

Warning
The terminals at the limit switches are live when the
switch closes.
6.6.1 Servomotor with reversing potentiometer
During operation, all functions are controlled by an
external controller.
Note
Observe the installation and operating instructions
for the controller and the gas dosing unit.
6.6.2 Servomotor with analogue control
Warning
Do not touch bare wires or clamping screws!
Displays/Control elements
Status LEDs
The status LEDs indicate the operating state of the servomotor.
4 3 2 1
Fig. 36 LEDs
(from right to left)
Item Description
1 Red LED: Fault
2 Blue LED: Operation
Green LED:
3
Clockwise rotation (in the direction "close/min.")
Yellow LED: Anticlockwise rotation (in the direction
4
"open/max.")
DIP switch
The DIP switch is used to reprogram the final positions and define
the direction of rotation.
On delivery, the switches are set to the "Inverse" direction of
rotation (= normal) and "Automatic" (= operation).
On =
On
1 2
Inv. =
Fig. 37 DIP switch
Item Description
Switch "inv./ " Reversing the effective direction
Operation (Auto)
Switch "Auto/Man"
Programming (Man)
Auto =
Man. =