Maintenance; Functional Check; Cleaning; Spare Parts - Grundfos AQC-D6 Montage- Und Betriebsanleitung

12. Maintenance

Interval for functional check
• At least once a week.
Interval for cleaning
• Whenever faults occur.
• Every 6 months.
Interval for replacing the electrolyte
• Every 6 months.
Always recalibrate the measuring system after
Caution
cleaning or maintenance has been performed!

12.1 Functional check

Calibration check
• Recalibrate the measuring cell with an analytically determined
value at least once a week.
Observe section 9.7 Calibration
and operating instructions.
Sample water flow check
• Check and, if necessary, adjust the sample water flow rate
through the measuring cell.
Functional check of the measuring module
• Check the bypass for leaks.
• Check the circulating pump for noisy operation.

12.2 Cleaning

To check the fill level of the electrolyte or clean the measuring cell
in the event of malfunctions, the electrolyte chamber must first be
unscrewed.
When cleaning, the following cleaning steps are performed in
sequence.
Please also refer to the measuring cell graphic in section
7.2 Design of the measuring cell.
12.2.1 Switching off the measuring cell
1. Switch off the power supply. If this is not possible, remove the
cable on the measuring cell.
2. Switch off the sample water supply.
12.2.2 Removing the measuring cell
1. Remove the measuring cell from the flow fitting.
12.2.3 Cleaning the electrolyte chamber
1. Unscrew the electrolyte chamber.
In the event of limescale deposits:
2. Soak the electrolyte chamber for a few hours in approximately
1 % hydrochloric acid until clean.
3. Rinse with clean water.
12.2.4 Cleaning the electrode
In the event of heavy soiling, the electrode must be cleaned.
1. Rinse the electrode finger (= measuring electrode) with clean
water, and then dry it with a clean paper towel.
2. Use the special emery paper provided to carefully clean the
gold tip of the dry electrode finger.
– Place the emery paper on a dry paper towel, and hold the
edge of the emery paper.
– Hold the measuring cell vertically, and then rub the tip of the
electrode carefully over the emery paper two or three times.
The emery paper should only be used to clean the
precious metal tip (gold) on the electrode tip of
Caution
soiling. The remaining surface (metal coating) of the
electrode finger must not be sanded or removed!
16
and the Oxiperm Pro installation
12.2.5 Filling up with electrolyte
1. Screw the electrolyte chamber onto the measuring cell so that
the socket of the electrolyte flange just fits into the gap
(approximately 5 mm).
2. Fill electrolyte right up to the overflow, making sure there are
no bubbles.
3. Screw on and tighten the electrolyte chamber by hand.
– There must not be any air bubbles in the electrolyte
chamber.
– The electrolyte is considered safe to handle.
Do not use any other kind of electrolyte! Damaging
Caution
the electrode by using the wrong kind of liquid voids
all warranty claims!
12.2.6 Screwing on the measuring cell
Please refer to section 9.3 Preparing the measuring
12.2.7 Starting up the measuring system after it has been out
of service
Please refer to section 9.4 Starting up the measuring
• For details on recalibration, please refer to section
9.7 Calibration.

13. Spare parts

Accessories and wear parts
Description
Measuring cell
Spare parts set, consisting of
electrolyte and emery
Connecting cable for measuring
cell, 2 metres
Connecting cable for measuring
cell, 5 metres
Connecting cable for measuring
cell, 10 metres
UPS 25-60N circulator pump
HD-PE hose 6/8 mm, 2 metres
HD-PE hose 6/8 mm, 5 metres
HD-PE hose 6/8 mm, 10 metres

14. Disposal

The measuring module and its associated parts must
be disposed of in an environmentally sound way!
The system may only be dismantled by authorised
Note
and qualified personnel!
The operator is responsible for
environmentally-friendly disposal!
This product or parts of it must be disposed of in an
environmentally sound way. Use appropriate waste collection
services. If this is not possible, contact the nearest Grundfos
company or service workshop.
system.
system.
Product number
95708117 (314-180)
95708819 (553-1758)
91835331 (45.10124)
95708119 (45.10124/5)
95708120 (45.10124/10)
96913085 (53.650-1)
95709109 (526-011/2)
95709110 (526-011/5)
95709108 (526-011/10)