Checks Prior To Start-Up; Switching On - Grundfos AQC-D12 Instrucciones De Instalación Y Funcionamiento

20 21 22
14 16
19
1
1
4
6
9
10
12
9
Fig. 20 Conex DIS-D
53 55 57
54 56 58
1
1
4
4
1
12
9 10
11
9
Fig. 21 DIP
Pos. Description
1 Brown
2 White
3 Black
4 Blue
6 Outer conductor (screen)
7 Inner conductor
8 Reference electrode
9 Measuring electrode with counter-electrode
10 Counter-electrode
11 Pt100 temperature sensor (not with Conex DIS-C)
12 Water sensor

10.6 Checks prior to start-up

• Check the tightness of the whole system.
• Check the electrical connections.
2
8
7
8
12
9
63 65
64 66
2
6
7
8 8
11
12
9

10.7 Switching on

Observe the installation and operating instructions of
Caution
the measuring amplifier and the device controlled!
Warning
At a pressure of more than 3 bar and if the
measuring cell is not deaerated, the cell might burst.
Ensure draining and deaeration.
Do not exceed the max. system pressure of 3 bar.
Do not put a damaged measuring cell under
pressure!
At first start-up or after long-term stop: Let the
Caution
system run for at least two hours to avoid faulty
measurements and calibration!
G
Fig. 22 Setting the quantity of sample water
1. Close the sample water shut-off valve (X).
2. Close the regulation of sample water quantity (G).
3. Close the sampling cock (I).
4. Open the inlet and outlet side of the customer's sample water
connection.
5. For deaeration, loosen the pH or redox electrode until the air
has escaped, then fasten it.
6. Open sample water shut-off valve (X) approx. two turns up to
the limit stop.
7. Open regulation of sample water quantity (G) slowly.
– Avoid turbulent flow!
8. Check that the cleaning wing (S) rotates.
– Try, if necessary, to briefly increase the quantity of sample
water with the regulation of sample water quantity (G) in
order to move the cleaning wing.
– If the cleaning wing still does not rotate, check and correct
its position, if necessary. See section
position of the cleaning wing.
9. Switch on the measuring amplifier.
10. Only switch on the device controlled after the first calibration,
if applicable.
X
I
10.2 Checking the
15