7
6
HOW THE ZVA AUTOMATIC WORKS
( see last page )
Due to the flow of AdBlue
®
through the nozzle a vacuum at the valve seat (6) is created. Air is
drawn in through the sensing port (1) at the tip of the spout, through the safety cut-out, past the
diaphragm, and into the AdBlue
®
. The valve will remain open while the air flows freely. When
AdBlue
®
reaches the sensing port, a vacuum builds up rapidly, lifts the diaphragm (4) and the
nozzle shuts off automatically. The automatic shut off is also activated if the ball of the safety
cut-out (3) rolls back to block the air passage. It will also occur if the spout is pointed upwards
or if the nozzle is dropped onto the ground.
HINTS FOR PROPER HANDLING
INSERT THE SPOUT FULLY INTO THE ADBLUE
®
TANK
.
The ball of the safety valve rolls
forward to open the air passage. This is the best way to refill in AdBlue
®
.
At some narrow horizontal filler necks this is not possible. The safety cut-out prevents the valve from
opening. The ball rolls backwards blocking the air passage and the nozzle trips off continuously.
In this case lift and hold the nozzle so that the ball now rolls forward opening up the air passage.
Refilling is now possible when provided nozzle is kept in this position.
Make sure that the ZVA AdBlue HV is hooked firmly into the AdBlue
®
tank so that it cannot
slip out during refilling.
DO NOT FILL TOO FAST
: Splashing of AdBlue
®
can shut off the nozzle before the AdBlue
®
tank
is full. Some filler necks are difficult to refill. Reduce the flow rate to avoid blow backs. The flow
rate can be adopted to the capacity of the filler neck by the three - speed lever latch.
First position
3/3 = Fully opened for well vented, straight and near vertical fill pipes
Middle setting
2/3 = Reduced output for narrower fill pipes
Lower position
1/3 = Slow position for poorly vented pipes
THE AUTOMATIC SHUT OFF WILL ALSO WORK IF THE LEVER IS HELD OPEN MANUALLY
,
according to EN 13012. Once the AdBlue
®
touches the sensing port (1) the automatic cuts off.
Topping up is possible.
A FEW DROPS OF ADBLUE
®
WILL REMAIN IN THE NOZZLE SENSING PORT
(1). Always tilt
the nozzle forward into the AdBlue
®
tank to drain for a few moments before returning it to the
nozzle boot. Then the next user will not be surprised by drips.
MAINTENANCE
Daily visual inspection of the ZVA AdBlue HV nozzle by trained personnel should be carried out
to ensure proper function. The nozzle shall be clean and not show any signs of damage ( e.g.
broken components, sharp edges, blocked lever, swivel non-rotating ). Especially check the
nozzle spout for damages. In case the nozzle spout is polluted by crystallized AdBlue
®
, soak it
in a bucket of warm water to dissolve the crystals.
The nozzle condition shall be thoroughly checked during the annual pump maintenance by
competent personnel. Applicable laws, regulations and Codes of Practice have to be followed.
Especially check the automatic shut-off and the tightness of the locking mechanism of the spout.
Nozzles in unfit condition for use must be replaced immediately.
IN CASE OF TROUBLE
IF THE NOZZLE FAILS TO OPEN
:
Please check, if the misfilling prevention of the nozzle is
unlocked by the magnet adapter ( ELAFIX 40 ) within the AdBlue
®
tank to ISO 22241-4.
If it still does not work, please check if the strainer between the nozzle and hose assembly is clogged.
If necessary, remove and clean it using compressed air, then reinstall it.
Also the pump pressure may be too low to push the valve poppet open. If the pump pressure
cannot be increased, disconnect the ZVA AdBlue HV, remove the swivel, pull the lever to the
open position and push the valve stem to open the poppet (7).
IF THE NOZZLE DOES NOT CLOSE AUTOMATICALLY
: The vacuum required to operate the
automatic action is too low. With the pump running, fully pull the lever (9) to check that full flow
can be obtained. Also check, if a loose spout, damaged vacuum cap (5) or clogged strainer (8)
have caused the pressure drop.
IF THE ZVA KEEPS TRIPPING OFF PERMANENTLY
: Check if AdBlue
®
has crystallized
in the spout tip. AdBlue
®
tends to crystalize. Due to evaporation of water, white crystals will
show. If these should block the air passage ( a sign for this is that the ZVA AdBlue HV keeps
tripping off continuously ), this can be solved easily by putting the nozzle spout in a bucket with
warm water. In order to avoid contamination, please rinse the nozzle spout with AdBlue
®
before
the next refilling.
Then check if it is caused by the ball of the safety cut off by shaking the nozzle. If the ball is
free to move, it will rattle. To clear the air passage blow compressed air up the spout until air
comes out of the sensing port (1).
If dispensing is not possible due to failed dispenser heating ( icing )
, first bring back the heating
into service. Once a sufficient operation temperature is reached, dispense at least 3 − 4 litre
AdBlue
®
to restore the full functionality.
If ZVA AdBlue HV still does not work properly
, please contact your service contractor or Elaflex.
GUARANTEE
We guarantee against defective materials and manufacturing up to 18 months from date of supply.
If the delivery date cannot be established, the date code on the nozzle ( i.e. · 2020 = 2
nd
quarter
2020 ) prevails. Excluded are nozzles and parts subjected to wear and tear, abuse and to conta-
mination. Furthermore excluded are damages by misuse, indirect damages and costs, travelling
related to exchange and repair work. We refuse any liability for consequential loss or damage
resulting from the use of our nozzle.
Note :
AdBlue
®
is a trademark of VDA.