Syn-Tech Systems FuelMaster FMU-2500 Classic Installation Manual page 52

FuelMaster Installation Manual
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detection. Pump handle detection settings differ between FuelMaster classic and Plus FMUs. Pump
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handle detection in DoD systems functions the same as in classic systems. In classic and DoD
systems, pump handle detection has two settings, YES and NO. When set to YES, detection must be
present when the handle is turned on and must go away when the pump handle is turned off. For a
YES setting, pump handle detection must be wired into the appropriate LN position: LN1 for hose 1,
LN2 for hose 2, etc. The NO setting has no detection at any time.
In the FuelMaster Plus systems, there are four pump handle detect settings: START ONLY, START
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AND END, END ONLY, and NONE. START ONLY detects the pump handle or switch only when it is
turned on. It disregards the turn off at the end of the transaction. START AND END is the same as
YES in the classic and DoD systems. It detects the pump handle being turned on at the beginning of
the transaction, and turned off at the end of the transaction.
YES, START ONLY, and START AND END pump handle detect settings require the pump handle to
be off with no power to the FMU LN positions when the transaction is started. The user is prompted to
TURN ON PUMP HANDLE TO DISPENSE THE SELECTED PRODUCT after responding to the FMU
prompts. When the pump handle is turned on, power is applied to LN, the applicable relay is
energized, then authorization power is sent from LD to the dispenser. YES and START AND END will
end the transaction when the pump handle is turned off.
What if I have a constant hot or neutral on LN?:
if there is a constant hot or neutral on LN, LN
cannot be used for pump handle detection. This does not mean pump handle detection must be
turned off. It just means pump handle detection cannot be detected on LN.
Pump handle detection may be transferred to a PHS position on terminal strip TB3 on the Pedestal I/O
Board for pump handle detection only at the end of a transaction. PHS is only used for pump handle
detection. It cannot be used as an input to the relay assemblies, and a subsequent output from LD.
Pump handle detection is transferred from LN to PHS by wiring pump handle detection into the
appropriate PHS position (PHS1 for hose 1, PHS2 for hose 2, etc.), and cutting one leg of the resistor
at R92 (for hose 1, R93 for hose 2, R94 for hose 3, etc.) between the automatic/manual mode switch
receptacles on the Pedestal I/O Board. One leg only is cut so the resistor remains available should it
be necessary to reuse it.
This is a situation where END ONLY is used. The END ONLY setting disregards the pump handle at
the beginning of the transaction but detects the turn off at the end of the transaction.
AIM2™ scenario:
an AIM2™ passive transaction does not require someone to start their
transaction at the FMU. Instead, they park their vehicle next to the dispenser, take the fuel nozzle
down, turn on the pump handle, insert the fuel nozzle into the fuel tank filler neck, and pump fuel.
AIM2™ fueling scenarios ignore pump handle detection. Something which must be kept in mind is the
backup scenario should AIM2™ not be installed on all vehicles in the fleet. Those vehicles will still
need the FMU configured as it should be for a vehicle using an access method other than AIM2™.
What about the NO or NONE settings?:
pump handle detection, except in DoD systems, is
not always required. There may not be any receipt printer, and the layout of the servicing site may not
lend itself to passing off an active fuel nozzle to another customer. If this is the case, pump handle
detection need not be wired and the FMU may be configured with NONE (in Plus systems) or NO (in
Classic systems). In either case, there is no pump handle detection at the beginning or end of the
transaction.
Controlling counts during reset:
the +12V pulser power positions on J4 through J7 of the
Pedestal I/O Board are powered whenever the FMU has its power switch turned on. As a result, some
mechanical dispensers with mechanical pulsers may generate pulses as the meter resets to zero.
Over several transactions this could result in recording a significant quantity of non-existent fuel. In a
retail operation the fueling customer could be charged for fuel he/she didn't receive. This can be
avoided through pump handle detection. If YES (with Classic systems) or START ONLY or START
AND END (with Plus systems) is used, any pulses generated during the dispenser reset cycle will be
thrown out in the transaction recorded by the FMU. All other pump handle detection options (NO,
NONE, or END ONLY) will save those unwanted pulses.
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