MDE-3116E Distribution Box PA0306 Installation Instructions · November 2015
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Appendix: Rewiring Transformer for Smaller Sites
Appendix: Rewiring Transformer for Smaller Sites
For smaller sites (two-wire wiring runs less than 100 feet) with few fueling positions,
transistors Q21 through Q28 may overheat. In those cases, proceed as follows:
Do NOT attempt to rewire the transformer with power applied.
WARNING
Follow the lockout/tagout procedures in
“Important Safety Information”
Accessing Transformer
To access the transformer for rewiring, proceed as follows:
1
Turn off the breaker associated with the dedicated receptacle supplying power to the D-Box
and lockout/tagout.
2
Unplug the power cord from the dedicated outlet.
3
Unplug the power cord from the D-Box.
4
Remove the D-Box cover.
5
Disconnect dispenser-loop wiring, POS cables, and transformer power from the D-Box
boards.
6
Remove the board tray to expose the transformer.
7
Remove the shield that surrounds the transformer.
8
Remove the transformer from the mounting studs.
