Commissioning; Preparations For Commissioning; Vacuum Connections; Electrical Connections - Grundfos VGA-113-110 Instrucciones De Instalación Y Operación

5. Commissioning

5.1 Preparations for commissioning

5.1.1 Vacuum connections

Warning
Before connecting, ensure that the valves of all gas
containers are closed.
Only use the intended line types!
3
4
Fig. 16 Vacuum connections
Item Description
1 Vacuum line to the vacuum regulator
2 Overpressure line
3 Vacuum line to the dosing regulator
4 Vacuum line to the injector
Only tighten the union nuts of the vacuum
connections by hand. Do not use any tools!
Caution
Danger of damages!
Maximum length of the vacuum line, see chapter
2.7 Recommended diameter
• At the vacuum regulator, connect the vacuum line (1) and
connect it to the dosing regulator (3).
Warning
Lead the overpressure line downwards, as chlorine is
heavier than air.
Connect the overpressure line to a suitable
adsorption device. If using a gas warning device:
Mount the sensor in a distance of about 10 cm from
the outlet hole of the adsorption device.
• Connect the overpressure line (2).
• Connect the vacuum line to the injector (4).

5.1.2 Electrical connections

Before connecting the mains cable:
Check if the mains voltage indicated on the type
plate corresponds to the local mains voltage. Wrong
voltage can lead to damages of the product!
To ensure electromagnetic compatibility (EMC):
Caution
Signal lines must be shielded. The shield must be
connected to PE or ground on the side of the
counterpart, par exemple a controller.
Signal lines and mains lines must be guided in
different cable channels.
16
VGA-111
2
1
Vacuum regulator e.g. VGA-111 with liquid trap and/or
contact pressure gauge
• Connect the heating of the optional liquid trap.
– Connect the mains line to the mains.
• Connect the optional contact manometer.
– Connect two cables with an external evaluation device.
The polarity is arbitrary.
Note
Dosing regulator VGA-113 with servomotor
Warning
Disconnect from mains before removing the cover!
Observe local safety precautions!
Protect cable connections and plugs against
corrosion and moisture.
Close unused screwings with suitable caps!
• Establish the electrical connections according to the following
terminal diagrams.
– with current input 4-20 mA
mains
4-20 mA
10 1 N PE
8
+ L1 N PE
Fig. 17 Terminal connections, current input
– without current input, with feedback potentiometer
Limit switches
Motor control
ST1
PE 5 1 0
PE N
open
closed
close
Fig. 18 Terminal connections, with cheedback potentiometer
Warning
The terminals 3 and 5 of the limit switches are on
mains potential when the switch closes after the limit
position had been reached.

5.2 Checks before commissioning

Check tightness of the total plant before start-up.
Warning
Check the tightness not until the total plant is ready
for start-up.
Danger of gas leakage!

5.2.1 Checking the gas solution lines and the non-return

diaphragm of the injector

– Observe the manual of the injector!
Check-back
potentiometer
ST2
2 3 A S E
end
start
opened
slider