Grundfos AQC-D6, Installation And Operating Instructions Manual

Page: 10 / 18

English (GB)
10
Connecting to the connection block of the Oxiperm Pro, from
software version V0.20
Fig. 11 Connecting to the connection block of the Oxiperm
Pro, from software version V0.20
1. Connect any current output cables as required.
2. Connect any relay contacts as required.
Always observe the Oxiperm Pro installation and operating
instructions.
3. Connect the power supply cable.
9.2.2 Connecting the circulating pump
The circulating pump (asynchronous squirrel cage motor) on the
measuring module is powered directly by the power supply and is
not connected to the Oxiperm Pro control unit. It is equipped with
thermal overload or impedance protection, and therefore external
motor protection is not required. The required connected loads
are indicated on the nameplate of the circulating pump.
You will also find electrical data in section
6.2.1 Electrical data of
the UPS 25-60N circulating pump .
9.3 Preparing the measuring system
Please also observe section 10. Operation .
The measuring cell (pos. 3) is filled with electrolyte at delivery.
Prepare the flow fitting (pos. 2):
Loosen the PDVF ring with 1" thread (pos. 1).
Fit the measuring cell (pos. 3) in the flow fitting (pos. 2).
1. Remove the protection cap.
2. Slide the measuring cell into the flow fitting until the liquid
flows well around it.
Tip: When fitted in its final position, the upper part of the
measuring cell should still project around 20 mm out of the flow
fitting.
3. Fix the measuring cell (pos. 3) in place using the PVDF ring
(pos. 1).
TM
06
81
17
4
616
Pos. Connection Description
AQC-D6 measuring cell
67 - 12 V Brown
68 White
69 M Yellow
72 Green
Water sensor
54 + Black
53 - White
67 69 71
68 72 70
53 55 57
54 58 56
Note
An on/off switch should be connected to the power
supply cable to allow the circulating pump to be
switched off during long measuring module
downtimes.
Caution
Dry running will damage the circulating pump!
The pump bearings are lubricated by the liquid
flowing through the pump, although the pressure
must be at least 0.05 bar (0.5 mWS).
Caution
Please observe the precise instructions in section
12.2 Cleaning !
Risk of incorrect measurement.
Note
The protection cap of the measuring cell is filled with
electrolyte!
Warning
A sudden failure of the measuring cell can lead to
excessive levels of chlorine dioxide! Make sure you
have suitable provisions in place for this!