PCL NEXUS serie Bedienungsanleitung Seite 6

NEXUS Generator & Inflator user manual
Flat tyre conditions: standard
inflation and nitrogen cycle
For tyres below 5 psig or 0.3 bar, press the start button to enter a
standard inflation or press N2 button to enter a nitrogen purge
cycle.
Note: When initiating a nitrogen cycle under flat tyre conditions
there will only be ONE N2 purge rather than the standard TWO N2
purges.
The one purge under this condition will give the same N2 purity as
a standard cycle.
Observation: If you accept a N2 purge under a flat tyre condition
the tyres will inflate to default set pressure then deflate to around
10% of this value then back up to the default pressure. Once
default pressure is reached the alarm sounds and end flashes on
the LCD display and then follow standard completion procedure
stated earlier.
Emergency stopping
Stop the inflation / deflation cycles by pressing any button on the
front panel or by turning the Nitrogen valve from FILL to STOP.
To adjust N purge parameters
2
Number of Purge Cycles
Over Pressure Limit
Lower Pressure Limit
Tank Nitrogen Pressure
These can be adjusted if required by the operator by:-
1. Turn off the power and power on and before the unit can
display the default screen (example 32psi)Touch either the
START button or N2 button (long beep can be heard).
NOTE: The buttons have to be pressed within 5
seconds of the unit being powered up.
2. The screen at this stage should display NPC. This is the first
of the four parameter settings. These parameters may be
scrolled up and down to view by pressing the + or -
buttons. The three parameters are fully defined in (1)
Parameters.
3. To access any of the parameters, press start, this will open
up the parameter contents, adjust values using the (+/-)
buttons and save value chosen by pressing the start button.
4. To exit out of any parameter press the N2 button once, this
will return you to the set default press.
Adjustment of N2 Purge
parameters
The default setting for N2 control is contained within the
microprocessor as follows:
NPC
OPS
LPL
TNP
www.pclairtechnology.com
(1) Parameters
Definition
npc Number of purge cycles
ops Over pressure setting
lpl Lower pressure limit
tnp Tank Nitrogen Pressure
npc is adjustable between 1 and 5 cycles = increase cycles to
improve N2 tyre purity. On N6 models ONLY when the desired
inflation pressure is above 60psi/4.1bar you only require 1 purge
as standard to achieve an acceptable purity level while increasing
inflation times.
ops is adjustable between 0 and 29 psig/2.00 bar = allows the
inflation pressure to go beyond the set pressure by the value
assigned, this may be used to compensate for a reduced number
of N2 cycles .
lpl is adjustable between 10% to 50% and represents lower limit
for purging. For tyres with higher set pressures the low pressure
threshold can be increased to reduce time, and can be coupled
with an increased number of N2 cycles.
tnp is adjustable for the NEX6 only. The NEX6 is factory set at
9bar/130psi. If you max inflation pressure is below 8bar/116psi or
less you DON'T need to change the TNP. Always remember that
the Tank Nitrogen pressure (TNP) MUST be at least 1 bar / 14.5psi
higher than the max inflation pressure. For example if you are
inflating to 9bar/130psi your TNP MUST be set at 10bar/145psi. To
achieve the TNP pressure the input pressure (seen on the
regulator on the side of the unit) must be 1 bar higher e.g.
11bar /160psi.
Unit usage monitoring
Hours of N2 cycling
Numbers of complete N2 cycles
Number of top-offs
These can be adjusted if required by the operator by:-
Pressing + and - buttons simultaneously (long beep can be heard)
The screen at this stage should display CNT. This is the first of the
three monitoring settings. These settings may be scrolled up and
down to view by pressing the + or - buttons.
CNT shows the number of N2 top off's which have been completed.
CNP shows the number of complete N2 purge cycles completed.
PSH shows the number of hours of operation of N2 generation.
To exit from the monitoring options simply leave the screen
buttons untouched for 20 seconds.
PCL standard settings
2
0 psig/bar or set pressure
10 % of target pressure
As defined in table on page 2
PSH
CNP
CNT