Care And Maintenance - Dennerle 160 Primus Notice D'emploi

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 adju-
sting the number of bubbles accordingly.
Example: Carbonate hardness 4 °d, recommended CO
20 mg/l
= recommended pH 6.8
Too much 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 Replace the CO cylinder
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• Empty cylinder: Close cylinder valve. Unscrew coupling ring using
27 mm spanner and screw pressure reducer onto refilled
reusable CO cylinder. Open cylinder valve The bubble count
2
setting will be retained.
• Full cylinder: Close cylinder valve. Turn setting knob of pressure
reducer towards " + " as far as it will go, in order to release any
residual pressure in the pressure reducer (if a solenoid valve is
connected, it must be open for this purpose). Unscrew coupling
ring using 27 mm spanner and screw pressure reducer onto re-
filled reusable CO cylinder. Open cylinder valve Reset num-
2
ber of bubbles.
• Always close the cylinder valve in order to shut down the CO
supply for a prolonged period. Unscrew the pressure reducer
when the cylinder is to remain out of use for a prolonged period.
5.2 Testing the CO backflow check valve
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The check valve protects your valuable pressure reducer/solenoid
valve from corrosion caused by back-flowing water. As dirt particles
may collect on the sealing surfaces over the course of time, the back-
flow 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
CO correct Not enough CO
2
pH
10 8 6 5 4 3
15 12 10 8 6 5
20 16 13 10 7 6
25 20 16 13 10 8
30 24 19 15 12 10
35 28 22 18 14 11
40 32 25 20 16 13
45 36 29 23 18 14
50 40 32 25 20 16
55 44 35 28 22 18
60 48 38 30 24 19
65 52 41 33 26 21
70 56 44 35 28 22
check valve and pressure reducer/solenoid valve and shut down the
CO supply for 24 hours (close pressure reducer/solenoid valve). If
2
there is water in the test hose after this 24-hour period, this indicates
content a leak on the backflow check valve.
2
The opening of the check valve can only be tested with CO
content nimum pressure of approx. 0.3 bar is required to open the valve. It is
2
not possible to "blow through" the valve with your mouth.
Important note: Use only check valves designed for use with CO
2
as the special CO
ves may become brittle through contact with CO
space of time, resulting in leaks.
3 2
Corrosion damage on the pressure reducer/solenoid valve
4 3
5 4
as a result of water entering into the device is excluded
6 5
from the guarantee coverage.
8 6
9 7
10 8
5.3 Replacing the washer
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• We recommend replacing the washer (art. no. 3056) in the adapter
13 10
14 11
for connection to reusable cylinders on a regular basis, in order
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to rule out leaking cylinder connections at all times.
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• There is a Longlife washer in the connection socket of the pressure
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reducer. It is not normally necessary to replace this washer during
the service life of the pressure reducer. The seal can only be
replaced using special tools: Please send in the pressure reducer
to Dennerle's Customer Service department.
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
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! ©
2
• 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
recalibrated by carefully screwing it in or out in steps of approx.
1/8 of a turn.
5.5 Removing the CO
After prolonged service, the CO
to the connector of the pressure reducer and other CO
To remove the hose, it is best to lever it off using a small screwdriver.
check valve from Dennerle. Standard air check val-
2
be supplied although the cylinder is full and the setting
for a few seconds with the setting knob in
2
hose
2
hose may be very firmly attached
2
, as a mi-
2
, such
2
within only a short
2
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equipment.
2
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