Page 4-2
Document Ref 903647-001 Rev 3
PAS V3 Pump for Fuel Dispensers
Component Technical Manual
4
TROUBLESHOOTING
4.1
Outlet Pressure
The flow of the PAS V3 is regulated with the outlet pressure. To adjust the outlet pressure:
- Unscrew the pressure plug (see reference [20] in the schematic diagram) with dimensions
M10 x 1.0 spanner size 17.
- Connect the pressure gauge via the flexible pipe into the hole of the outlet-cover (See
section 5.3 for specific tools).
- Take the nozzle out of the dispenser and when the pump starts to run (nozzle is still
closed), check the pressure at the pressure gauge. On top of the by-pass cover a + and -
show in which way the by-pass screw must be turned to increase (+) or decrease (-) the
pressure. When the desired pressure is adjusted, check whether a correct flow is reached.
The pressure value depends on installation characteristics. However when adjusting the
outlet pressure, the following values for the pressure are to be respected:
- For the PAS V3 80 l/min models the normal working pressure in by-pass mode should be
between 2 and 2.5 bar, and should always be > 1,7 bar.
- For the PAS V3 130 l/min models, the pressure should be between 2.5 and 3.5 bar.
For dispensers delivering 9.6 m
3
/h (two PAS 80 pumps in parallel), the pressure of one
pump has to be 0.2 bar higher than the other one.
Issue B
4.2
Inlet Pressure
The inlet pressure can be measured by using a special filter box cover (see section 5.4)
and a pressure gauge (range –1 bar up to 3 bar).
At full flow (2 nozzles of 40 l/min) the inlet pressure measured is the pressure loss caused
by the resistance of the site configuration (height of pump in comparison to the reservoir
and length of pipe work).
Outlet pressure plug
Outlet valve seat
Vortex valve cover
By-pass adjustment
