SER
VICING
87
PULSE Installation, Commissioning and Servicing Manual - Revision 19
15.2.2 Adjusting Proportional Valves
There are two valve setting modes in stack test, slow flow and fast flow.
The 0 key is used to access the slow flow settings. The 5 key is used to access the fast flow
settings.
The 0 and 5 keys are used to toggle valves and motors. Once either key is used the other
key has no function until
f
or
is pressed.
When a valve is opened it will open at the configured setting for the mode it has been
opened in.
Slow flow is used to start and end a preset/prepay delivery. Fast flow controls normal
delivery valve position.
Edit mode is denoted by a (
*
) in the valve selection. Open valves not in edit mode will
show a (1).
When a proportional valve is opened in edit mode, (
*
), and the motor is turned on, (1), the
flow rate setting for the currently selected valve can be adjusted as follows:
The first two valves opened will default to edit mode. Only when one of these valves is
closed can another valve be edited.
1% increments using the keys
1
(+) and
7
(-).
5% increments using the keys
3
(+) and
9
(-).
Press
f
to store the changes made to the valves in edit
mode.
Press to
exit without saving to the current stack
menu.
15.2.3 Key Points
1. A valve must be open to set the flow rate. Press
f
to
store all changes.
2. Where there is high flow diesel the flow rate must be
set for each hose individually. All other hoses should be
off. Ensure the flow rate does not exceed the nameplate
Qmax value. The valve % must be set and saved to limit
the flow to less than the Qmax.
+ 5%
- 1%
- 5%
+ 1%
1
3
7
9
2
4 5 6
8
A
B
40 40
38
0
Valve %
Flow rate
C
D
LPG has a two-stage valve. For the purpose of stack test each stage is a separate valve.
Flow control automatically adjusts valve settings and any changes are reflected
in stack test.
Slow and fast flow valve settings are used when the flow control function is ON or OFF.
3. Higher flow rates are not necessarily better. A flow rate of 30 – 38 L/min is optimal.
40 L/min or greater will likely cause the nozzle to trip with tight filler necks.
4. A change of 1 - 2% can affect flow rates by several litres per minute.
5. Any adjustment to proportional valves will be over-ridden by the Flow Control
setting when set to ON.
Version 1.20
