OPW M2010-EU, Installation Manual

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3.1 Safety Precautions
WARNING: DO NOT connect the OM4 output Module directly to a
submersible pump! The OM4 controls pumps INDIRECTLY, through relays
or contactors.
There can be high voltages in the OM4. Servicing of the unit must only be
done by an approved technician.
The output relays in the OM4 are not intrinsically safe! Before you do
servicing of the OM4 unit, disconnect the power. Power to and from the
relays must also be disconnected.
Do not put probe or sensor wiring in conduit that contains wiring for devices
that are connected to the OM4 Output Module.
3.2 Codes
Relay wiring is in the Class 1 wiring category. Refer to the National Electrical Code (NFPA No. 70) and the
Motor Fuel Dispensing Facilities and Repair Garages Code (NFPA No. 30A) to make sure your installation is
correct. The installer must know and obey all applicable local codes in the country or county where this unit is
installed.
3.3 Hazardous Area Definition
A fuel dispenser is a hazardous area as specified in the National Electrical Code.
DANGER: Do not install the OM4 Output Module in a hazardous area.
Do not connect this unit to devices that are in a hazardous area.
Doc. No.: M2010-EU Rev.: 13
Page 25 of 149