6. Operation
WARNING
Toxic material
Death or serious personal injury
‐
Wear personal protective equipment when handling
chemicals.
The dosing flow is adjusted with the adjusting knob at the
rate valve of the dosing regulator.
In versions with optional servomotor, the dosing flow can
also be adjusted via an external controller.
6.1 Starting the chlorine gas dosing system
1. Close the rate valve at the dosing regulator using the adjusting
knob.
2. Open the shut-off valve at the injection unit.
3. Open the motive water valves.
4. Switch on the booster pump.
5. Open the chlorine container valve.
6. Slowly open the rate valve of the dosing regulator using the
adjusting knob, until the ball in the measuring glass of the
flowmeter indicates the desired flow.
If the dosing flow is adjusted via an external controller,
no adjustment can be made at the dosing regulator.
See the manual of the external controller.
6.2 Reading the dosing flow
The dosing flow can be read at the top of the ball in the measuring
glass of the flowmeter.
g/h
lbs/day
TM040717
Reading the dosing flow
The scale of the measuring glass is adjusted to a gas tem-
perature of 20 °C.
If the temperature differs extremely, the dosing flow may
differ from the shown value.
6.3 Setting the dosing flow manually with the
VGA-117-110 dosing regulator
1
2
Setting the dosing flow
1. To increase the dosing flow, turn the adjusting knob very slowly
counter-clockwise.
Do not turn the adjusting knob any further, if the maxi-
mum dosing flow is reached. There is no locking.
2. To reduce the dosing flow, turn the adjusting knob very slowly
clockwise.
6.4 Setting the dosing flow automatically with the
VGA-117-190 dosing regulator
The VGA-117-190 dosing regulator is checked and preadjusted in
the factory with the servomotor. It can be readjusted on site.
•
Servomotor type Tensor Basic (4-20 mA version): adjust the end
positions and the respective mA setpoints.
•
Servomotor type Nano (potentiometer version): adjust the limit
switches.
Read the enclosed supplier manual of the servomotor
used.
6.5 Emergency operation
6.5.1 Disconnecting the servomotor for emergency operation
If the servomotor is damaged, or for maintenance tasks, the
servomotor can be disconnected from the rate valve of the dosing
regulator. The automatic dosing regulator can then be operated
manually.
1
2
TM040752
Disconnecting the servomotor from the rate valve
1. Switch off the power supply of the servomotor.
2. Slide the coupling (1) upwards.
3. Push the retention pin (2) through the coupling, until the
coupling cannot move down any longer.
The servomotor is disconnected from the rate valve. Now the
dosing flow can be adjusted manually.
6.5.2 Reconnecting the servomotor
3
2
TM040753
Reconnecting the servomotor to the rate valve
1. Push back the retention pin (2).
2. The coupling slides down.
3. Turn the adjusting knob (3), until the coupling snaps in.
The servomotor is connected again.
11
English (GB)
Summary of Contents for Vaccuperm VGA-117
Page 2: ......
