Checks Before Commissioning - Grundfos Vaccuperm VGS-141 Instrucciones De Instalación Y Funcionamiento

Measuring transducer (option)
• Connect the terminals of the plug with the corresponding
terminals of an external evaluation device according to the
connection chart.
2 1
+
-
+ -
24 V DC
Fig. 24 Connection chart of measuring transducer
5.1.3 Measurement and Control Electronics Conex (option)
• see operation manual of measuring amplifiers and controller
®
Conex DIA-2Q or controller Conex
5.1.4 Chlorine measuring cell (option)
• see operation manual of the chlorine measuring cell
5.1.5 Mounting the manual/automatic position remote
indication at the rate valve
This indication shows e.g. in the switch room, if the optional
servomotor is engaged and thus able to convert the incoming
signals.
• Loosen the cover of the adjustment knob with a big
screwdriver; take off the adjustment knob.
• Put the magnetic bridge sensor (item 5.6) into the lower cavity
of the gearbox bearing and fasten using the two recessed
head screws (item 5.7).
• Disassemble the adjustment knob by fully screwing out the
clamping nut.
• Insert the adjustment knob tongs into the washer disc (item
5.5) in a way that the tongs collar is in the washer disc.
• Apply the washer disc to the adjustment knob enclosure so
that the holding pin of the enclosure dips into the hole of the
washer disc.
• Slide the spring washer over the adjustment knob tongs and
screw the clamping nut onto the tongs.
• Put the adjustment knob onto the gearbox spindle as far as it
will go and tighten the clamping nut.
• Fit the cover of the adjustment knob again.
5.14
5.13
Fig. 25 Manual/automatic position indication
4-20 mA
®
DIS-2Q
5.1
5.12
5.7
5.6
5.5
5.1.6 Gas connections
Warning
Ensure that all container valves are closed before
connecting!
Only use the intended gas lines!
• Connect line from vacuum regulator
• Connect line to injector
from vacuum regulator
to injector
Fig. 26 Gas connections of gas dosing systen VGS

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 chlorine break-out!
5.2.1 Checking the gas solution lines and the diapgragm non-
return of the injector
• Observe the manual of the injector!
5.2.2 Checking the tightness of the vacuum lines
Vacuum lines are all lines between vacuum regulator and injector.
• Close all container valves
• Close the rate valve
• Open the shut-off valve at the injection unit
• Open motive water valve
• Switch on the booster pump
• Open the rate valve
Floater shows gas flow or vacuummeter shows more than -
9 m w.c. => Leakage in vacuum line!
• Close rate valve
• Switch off booster pump
• Close motive water valve
• Close the shut-off valve at the injection unit
• Check the vacuum lines and the connection. If necessary,
• carefully re-tighten them.
• Check tightness again!
– Floater shows no gas flow, vacuummeter shows -9 m w.c. or
less => Vacuum lines are tight.
More possible reasons for insufficient operating
vacuum
• injector layed out too weakly or defective
Note
• injector obstructed
• booster pump layed out too weakly or defective
19