Intrinsic Safe Barrier Assembly Replacement - Wayne Dresser Vista 1 Series Service Manual

7.1.4. Computer Assembly Replacement,
12. Replace the DEM in its original position and turn the control power ON.
13. Program the dispenser as follows:
14. Reinstall the bezel.
15. Record totals a second time and give both sets of totals to the dealer/
7.1.5.

Intrinsic Safe Barrier Assembly Replacement

The Intrinsic Safe Barrier circuit board is mounted to the bottom of the plastic
cover (see Figure 7-3. and Figure 7-4.). The circuit board is not separately
replaceable; the complete ISB assembly (the black plastic box) must be
replaced.
1. Remove both bezels and place DEMs in Service position.
2. From the dispenser junction box side, unplug the connectors from the top of
3. Disconnect the ground wire from chassis.
4. Remove the (1) front and (1) rear mounting screws from the assembly.
5. Tilt the ISB assembly up and unplug the connectors from the bottom.
6. Replace with new ISB assembly using reverse procedure and ensure that the
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Part No. 920160 Rev A
a. Set the macro and all option programming.
b. Set the unit prices (if stand-alone); or
c. Set the fueling point number.
manager for his or her records.
the ISB assembly.
ground wire is re-connected.
continued
February 1997