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5.3 Replacing the washer
5.3.1
For reusable cylinders
We recommend replacing the washer in the adapter (art. no. 3056) for
connection to reusable cylinders on a regular basis, in order to rule out
leaking cylinder connections at all times.
5.3.2
For disposable cylinders
There is a Longlife washer in the adapter for disposable cylinders. It
is not normally necessary to replace this washer during the service life
of the pressure reducer. In case of damage, the entire adapter must
be replaced (art. no. 2997).
5.3.3
For disposable cartridges
The washer (art. no. 3035) in the pressure reducer can be levered out
carefully with the aid of a small screwdriver, which should have no
sharp edges (!) IMPORTANT: Be careful not to damage the sealing sur-
faces!
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 CO2 be supplied although the cylinder is full and the setting
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 CO2 for a few seconds with the setting
knob in 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
recalibrated by carefully screwing it in or out in steps of approx.
1/8 of a turn.
5.5 Removing the CO2 hose
After prolonged service, the CO2 hose may be very firmly attached to
the connector of the pressure reducer and other CO2 equipment. To re-
move the hose, it is best to lever it off using a small screwdriver. Do
not pull the hose off by force or cut it open with a knife, as this may
cause damage to the hose connectors!
6 What if ... – Troubleshooting
Fault
Cause
Pressure reducer is skew
A faint hissing sound
or has not been screwed
is to be heard at the
in tight enough.
screwed connection
between pressure redu-
cer and CO2 cylinder.
Washer dirty or faulty.
Solenoid valve closed
No more bubbles at
the CO2 diffusor.
CO2 cylinder empty
Setting knob closed
Hose connection
leaking
Needle valve blocked
7 Professional tips from Dennerle
•
Large quantities of valuable CO2 may be lost every day through
leaking CO2 hoses. We thus recommend the special Softflex CO2
hose from Dennerle.
•
Even when using CO2 diffusors with integrated bubble counter, it
is expedient to install an additional bubble counter close to the
pressure reducer. This enables the number of bubbles to be set
Remedy
Disposable
and
reusable cylinders:
Unscrew pressure
reducer and screw
back in place without
canting.
Fit new washer (see
5.3). Check that the
washer is fitted cor-
rectly and that the
sealing surfaces are
clean.
Disposable
cartridges:
Screw pressure redu-
cer tighter.
If leakage persists:
Empty
cartridge
outdoors by allo-
wing CO2 content
to escape!
Replace washer and
fit new cartridge (see
3.1.3 and 5.3.3).
Check power supply
Replace the CO2
cylinder
Open setting knob
Check hose connection,
replace if necessary
Clean and recalibrate
the needle valve.
14
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