Grundfos AquaCel AQC-D3, Installation And Operating Instructions Manual

Page: 23 / 28

English (GB)
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14.3.2 Dismantling the measuring cell
1. Remove the housing cylinder and ascending pipe.
– Remove the housing cylinder (T), and dismantle it.
– Remove the ascending pipe (S).
2. Remove the sample water regulating device and float body.
– Remove the valve insert (Q2) and adjusting spindle (Q1),
and separate them.
– Remove the float body (N).
3. Remove the filter.
– Unscrew the filter cartridge (P).
– Slacken the screw cap for the filter (P1) at the upper end of
the filter cartridge (P).
– Remove the filter strainer (P2) from the filter
receptacle (P3).
4. Remove the calibration cup and evacuation spindle.
– Remove the calibration cup (I) and evacuation spindle (J),
and separate them.
5. Remove the shut-off spindles and the bleeding spindle.
– Unscrew the shut-off spindles of the sample water inlet (V1)
and outlet (V2) and the bleeding spindle (L).
14.3.3 Cleaning the measuring cell
• Required tools and aids:
– soap suds, possibly diluted hydrochloric acid (5-10 %),
water
– abrasive domestic cleaning agent (for instance ATA, VIM).
– The flow armature (F) can be cleaned with conventional
soap suds.
– If high contamination or furring is evident, clean the
dismantled flow armature (F) briefly with diluted hydrochloric
acid (max. 5-10 %).
1. Clean the metal surfaces of the measuring electrode (D) and
the float body (N) with an abrasive domestic cleaning agent if
there are deposits.
2. Clean the filter strainer (P2) under running water. Use a soft
brush, if necessary.
3. Carefully clean all plastic parts with soap suds.
4. Use hydrochloric acid (5-10 %) for deposits.
5. Carefully rinse all parts with clean water.
6. Replace any damaged parts.
14.4 Assembling the measuring cell
• Re-assemble the measuring cell in reverse order.
– Screw in the shut-off spindles of the sample water inlet (V1)
and outlet (V2) and the bleeding spindle (L).
– Assemble and screw in the calibration cup (I) and
evacuation spindle (J).
– Assemble and screw in the filter cartridge (P).
– Insert the float body (N) with the sharp end facing
downwards into the measuring tube (M).
– Tightly screw in the valve (Q2), and screw in the adjusting
spindle (Q1).
– Fit the ascending pipe (S). Screw in the housing cylinder (T).
Fig. 25 Exploded view of screwed part / inlet chamber
Fig. 26 Exploded view of AQC-D3
Warning
Observe the safety regulations when using
hydrochloric acid! When cleaning with
hydrochloric acid it is absolutely necessary to
wear safety goggles.
Caution
Before using other detergents, check the
chemical resistance of the materials, as they may
destroy some components.
Caution
Do not clean electrodes, filters, float bodies or
other metal parts using hydrochloric acid.
Caution
Only tighten screw parts by hand; do not use
tools! Risk of leaking! Ensure that all O-rings are
fitted correctly!
TM
03
58
92
1
1
0
6
TM
03
58
82
1
1
0
6
TM
0
3
5
902
2
4
11
G1
D
X
W
H
W1
W1
P1
P2
P3
N
V1
O1
O
M
L
K
U1
I
G
G1
D
X
W
U2
V2
F
Q2
Q1 A1/2
S
B1
H
2
2
1
6
4
5
2
2
7
T