Grundfos AquaCel AQC-D3, Инструкция по установке и эксплуатации

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English (GB)
22
14. Maintenance
14.1 Intervals for cleaning and maintenance
• Clean the filter
– if high contamination is evident, or if the pressure drops
considerably.
• Clean the whole flow armature
– if high (visible) contamination is evident.
– if faults occur.
– before starting up again after a prolonged stoppage.
• Replace the electrodes.
– Grundfos recommends that you replace the reference
electrode and, if necessary, the redox or pH single-rod
electrode after 12 months.
– The measuring electrode is wear-resistant and does not
have to be replaced on a regular basis.
14.2 Cleaning and replacing the filter
• Required tools and aids:
– water
– soft brush.
1. Close the connection to the sample water inlet (U1) and
outlet (U2).
2. Unscrew the filter cartridge (P).
3. Unscrew the plastic screw thread (P1) at the upper end of the
filter cartridge (P), using a screwdriver or coin, if necessary.
4. Remove the filter strainer (P2) from the filter receptacle (P3),
and clean it under running water. Use a soft brush, if
necessary.
5. If damaged: Replace the filter strainer (P2).
6. Re-assemble the filter cartridge (P) in reverse order.
7. Check the tightness of the filter cartridge (P).
Fig. 23 Filter
14.3 Cleaning the flow armature
14.3.1 Removing the measuring cell
1. Close the water inlet, and switch off the measuring cell.
– Close the shut-off spindles of the sample water inlet (V1)
and outlet (V2).
– Close and/or switch off the device controlled (for instance a
gas dosing unit or dosing pump).
– Wait until the display of the measuring amplifier is at zero.
– Switch off the electricity supply to the measuring amplifier.
2. Empty the measuring cell.
– Open the bleeding spindle (L) and deaeration spindle (J),
and drain the water.
– Unscrew the connections to the sample water inlet (U1) and
outlet (U2).
3. Remove the electrodes and sensors.
– If a water sensor is fitted: Unscrew the screw (O1) on the
water sensor (O), and remove the sensor.
– Unscrew the plug for the measuring electrode (E), and
remove the electrode.
– Remove the reference electrode (B1). Fit thread protective
caps, and clean the electrode.
– Remove the pH (A1) and redox electrodes (A2), if
necessary. Fit thread protective caps, and clean the
electrodes.
– Fit protective caps on the electrodes. The protective caps
must be filled with 3-molar potassium chloride solution.
– Store electrodes with protective caps in a dry place.
4. Unscrew the measuring electrode.
– Unscrew the screwed part (H) from the flow armature (F)
with the slide (G1), and remove them carefully.
– Keep O-rings (W1).
– Remove the cleaning wing (X) and inlet chamber (W).
5. Remove the flow armature.
– Slacken the screws of the flow armature (do not unscrew
completely), press the flow armature upwards, and remove
it from the mounting plate.
Fig. 24 Exploded view of screwed part
Caution
Prior to maintenance work: Switch off the system
as described in section 13.3 Switching off!
Note
After cleaning, check the sample water flow rate,
and adjust it, if necessary.
TM
03
5
880
1
1
0
6
P1
P2
P3
Caution
The measuring cell must only be removed by
authorised personnel.
Caution
Observe the installation and operating
instructions of the electrodes!
Note
Carefully remove the screwed part (H)! The
cleaning wing (X) and inlet chamber (W) are loose
on the measuring electrode (D) and may fall out!
Keep O-rings!
T
M
03
58
9
2
1
1
06
G1
D
X
W
H
W1
W1