Care And Maintenance - Dennerle Nano Notice D'emploi

GA Nano Set Complete_Space_1-08414_489.qxd:Layout 1
nevertheless be avoided.
• Any indicator which may be dropped into the aquarium water by
mistake is harmless for the creatures living in the aquarium.
• The indicator should be protected from sunlight, heat and frost. Al-
ways keep ampoules protected from light during storage. The fil-
ling level may vary for technical reasons.
4.7 If you're keen to know more: How you can also calcu-
late the CO content in the aquarium
2
Certain correlations apply between CO
(KH) and pH value. The CO content in the water can be calculated ac-
2
curately on the basis of the pH value and carbonate hardness. Suitable
pH and KH tests are available from specialist retailers.
• Measure the carbonate hardness of your aquarium water.
• Read the pH value which corresponds to the desired CO
from the table. You should set this pH value +/- 0.1 by adjusting
the number of bubbles accordingly.
Example: Carbonate hardness 4 °d, recommended CO
20 mg/l = recommended pH 6.8
Too much CO CO
2
KH 6,3 6,4 6,5 6,6 6,7 6,8 6,9 7,0 7,1 7,2 7,3 7,4 7,5
2 32 25 20 16 13
3 48 38 30 24 19
4 64 51 40 32 25
5 80 63 50 40 32
6 96 76 60 48 38
7 111 89 70 56 44
8 127 101 80 64 51
9 143 114 90 72 57
10 159 126 100 80
63
11 175 139 111 88 70
12 191 152 121 96 76
13 207 164 131 104 82
14 223 177 141 112 89
CO -content in mg/l
2

5 Care and maintenance

5.1 Replacing the disposable CO
IMPORTANT: Unscrew pressure reducer from cartridge only
when cartridge is empty!
• Ensure that the cartridge is totally empty. For this purpose, turn
the setting knob to fully open position and check whether any bub-
bles issue from the CO diffusor. If a solenoid valve (integrated in
2
the Space pressure reducer) is in use, this must be open during the
check, i.e. supplied with power.
• Slowly unscrew the CO cartridge from the pressure reducer.
2
• Close the setting knob again.
• Screw new CO cartridge (art. no. 2994) into pressure reducer (see
2
2.1).
• Reset number of bubbles.
content, carbonate hardness
2
content
2
content
2
correct Not enough CO
2 2
pH
10 8 6 5 4 3 3
15 12 10 8 6 5 4
20 16 13 10 7 6 5
25 20 16 13 10 8 6
30 24 19 15 12 10 8
35 28 22 18 14 11 9
40 32 25 20 16 13 10
45 36 29 23 18 14 11
50 40 32 25 20 16 13 10
55 44 35 28 22 18 14 11
60 48 38 30 24 19 15 12
65 52 41 33 26 21 16 13
70 56 44 35 28 22 18 14
cartridge
2
05.06.2009
5.2 Testing the CO
2
The check valve protects your valuable pressure reducer from corro-
sion caused by back-flowing water. As dirt particles may collect on the
sealing surfaces over the course of time, the backflow check valve
should be checked at least once a year and replaced every 2-3 years
for safety's sake.
Tip: Install a transparent test hose temporarily between backflow
check valve and pressure reducer and shut down the CO
24 hours (close pressure reducer/solenoid valve). If there is water in
the test hose after this 24-hour period, this indicates a leak on the
backflow check valve.
The opening of the check valve can only be tested with CO
nimum pressure of approx. 0.3 bar is required to open the valve. It is
not possible to "blow through" the valve with your mouth.
Please use only check valves designed for use with CO
check valve from Dennerle. Standard air check val-
special CO
2
ves may become brittle through contact with CO
space of time, resulting in leaks.
Corrosion damage on the pressure reducer as a result of
water entering into the device is excluded from the gua-
rantee coverage.
2
3
5.3 Replacing the washer
4
The washer (art. no. 3035) in the pressure reducer can be levered out
5
6
carefully with the aid of a small screwdriver, which should have no
7
sharp edges (!) IMPORTANT: Be careful not to damage the sealing sur-
8
k
9
faces!
32
5.4 Cleaning and recalibrating the needle valve
There is a factory-calibrated needle valve in the hose connector of the
pressure reducer.
Should no CO be supplied although the cylinder is full and the setting
2
knob is turned to fully open position, this indicates that the needle
valve is probably blocked. In this case:
• Open the valve by turning by one half-turn in anti-clockwise di-
rection using a fine screwdriver (blade format 2 – 2.5 x 0.5 mm),
then "flush" with CO
fully open position.
Important: Do not unscrew valve completely!
• Close valve again by one half-turn.
• The valve is factory-set to approx. 120 bubbles per minute when
the setting knob is in fully open position. If necessary, it can be re-
calibrated by carefully screwing it in or out in steps of approx.
1/8 of a turn.
8:27 Uhr Seite 16
backflow check valve
, such as the
2
within only a short
2
for a few seconds with the setting knob in
2
k
33
supply for
2
, as a mi-
2
16