General Operation; Sequence Of The Dispensing Cycle; Unit Prices/Authorization - Wayne Vista Series Service

The general operation is very similar for all dispensers with model numbers beginning with V.
2.1.

SEQUENCE OF THE DISPENSING CYCLE

• When the nozzle is removed from the nozzle boot, the constant +5 VDC which the
computer sends to the handle switch goes to ground. At this point one of the lighted
buttons (grade select, cash/credit, or push-to-start depending on the model) will flash
indicating that one of the buttons must be pressed.
• When one of the lighted buttons is pressed the constant +5 VDC which is supplied to
the switch goes to ground; signalling the computer to begin its reset cycle.
• If the dispenser has received an Authorization signal either from a control system or
from the Authorize switch in the dispenser, the correct submersible pump relay will
be energized at this time.
• The computer performs a self test and flashes eights, blanks, then resets to zeros, on
the main sale display.
• The slow valve coil is energized two to six seconds, depending on option program-
ming settings, after the submersible pump relay is energized.
• After a small amount of fuel has been dispensed, the fast valve coil is switched on.
Both coils are now energized together.
• In preset sales the fast coil is de-energized just prior to the final shut-off amount. The
slow valve coil is then de-energized when the final amount is reached.
• When the nozzle is replaced in the nozzle boot the handle switch signal goes back to
+5 VDC, and the sale is complete.
2.2.

UNIT PRICES/AUTHORIZATION

Before any Wayne dispenser will reset two things must happen. First, the dispenser must
have unit prices set in it. Second, an authorization must be received from some source.
Both the unit prices and the authorization can be manually set at the dispenser, or set
from a control system. The function switches must be accessed in order to manually set
unit prices, set the authorize switch, or set the fueling point (see Figure 2-1). In order to
access the function switches complete the following steps:
• Lower the ad panel holder frame by pulling the holder frame out and down from the
top.
November 1992

2. GENERAL OPERATION

Part No. 917543 Rev. A
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