Care And Maintenance - Dennerle Evolution Primus Notice D'emploi

1-08413_0715_GA Drumi_Primus_Quantum_Layout 1 13.07.2015 12:00 Seite 13
Professional tip from Dennerle
The CO long-term test Correct from Dennerle provides the
2
simplest means of measuring the CO
a GREEN reading, the water contains exactly the right level of CO
4.3 Setting the number of bubbles
The required number of bubbles is dependent on various factors, such
as the stock of plants, water movement, lighting intensity, etc. The
appropriate CO supply level thus requires to be determined indivi-
2
dually for the specific aquarium concerned.
Rule of thumb for the basic setting: Begin at approx. 10 bub-
bles per minute per 100 l of aquarium water, i.e. 2 x 10 = 20 bub-
bles per minute for a 200 l aquarium.
Adjust the CO supply to the desired CO
2
over several days. Please note: The more vigorously the surface of the
water is set in motion, the more CO
rium again.
• Reusable cylinders: Slowly open the cylinder valve.
Quantum: The cylinder pressure manometer will now indicate
approx. 60 bar (at 20 °C).
• Slowly turn the setting knob on the pressure reducer towards
" + " until the desired number of bubbles is attained on the bub-
ble counter.
Please note: After adjusting the setting knob, there is always a
delay before the number of bubbles is altered accordingly (the
hose acts as a pressure buffer). You should therefore always wait
several minutes for the number of bubbles to stabilise.
Notes and tips:
- If the setting knob is turned towards " – " in larger steps of around
1 complete turn, the pressure reducer will release the superfluous
pressure through a small vent hole – audible as a brief hiss. This
venting serves to quickly stabilise the newly set number of bubbles.
- Quantum: The pointer on the bubble count scale may fluctuate
somewhat initially, depending on the supplied amount of CO
the set number of bubbles stabilises. This does not affect the con-
trol accuracy.
• Check the number of bubbles regularly in the first few days, cor-
recting as necessary. After this initial period it is generally sufficient
to check the number of bubbles once a week.
14
content. When the test shows
2
.
2
content in small steps spread
2
will be expelled from the aqua-
2
, until
2

5 Care and maintenance

5.1 Replacing the CO cylinder
2
5.1.1 Reusable CO cylinder
2
• 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 setting will
2
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 refil-
led reusable CO cylinder. Open cylinder valve Reset number of
2
bubbles.
• Always close the cylinder valve in order to shut down the CO
ply for a prolonged period. Unscrew the pressure reducer when
the cylinder is to remain out of use for a prolonged period.
5.1.2 CO Disposable CO cylinder
2 2
• The pressure reducer can be unscrewed again at any time – the
cylinder valve closes automatically.
• Screw pressure reducer onto new disposable CO
3.1.2). The bubble count setting will be retained.
• 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
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 at intervals between backflow
check valve and pressure reducer and shut down the CO
24 hours (close cylinder / pressure reducer). If there is water in the
test hose after this 24-hour period, this indicates a leak on the back-
flow check valve.
Important note: Use only check valves designed for use with CO
such as the special CO check valve from Dennerle. Standard
2
air check valves may become brittle through contact with CO
only a short 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.
sup-
2
cylinder (see
2
supply for
2
,
2
within
2