GILBARCO VEEDER-ROOT Encore 300 Series, Руководство по установке

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Installation
Page 40 MDE-3985L Encore® Installation Manual · May 2006
Connecting to ISD Vapor Flow Meter
At Dispensing Unit
The vapor Flow Meter is part of an ISD (In Station Diagnostic) system to measures the amount
of vapor returning to the UST (Underground Storage Tank). Wiring for this device must be
intrinsically safe and run in a separate conduit. Conduit must be potted where it enters and
leaves any designated hazardous zones. Potting requirements for hazardous zones must be
followed so fuel vapors can not migrate to other areas. The ISD Vapor Flow Meter wiring
terminates at TLS (Tank Level Sensor) console. The flow meter is in-line and near the vapor
return shear valve in the hydraulic area of the unit. Do not create any liquid flow traps. Refer
to
Figure 3-17: Correct Vapor Line Connection Method for more information on liquid traps.
Figure 3-26: ISD Vapor Flow Meter
Mating fittings
(contractor supplied)
Vapor Line Shear Valve
(contractor supplied)
ISD Vapor Flow Meter
Pipe and fittings
(contractor supplied)
Cable
Conduit to TLS
Console
Seal off
(contractor
supplied)
Junction box
Cord grip
Vapor return line from vacuum motor
outlet (assist) or hose manifold (balanced)
Vapor return to tank
Bottom rail of unit
Hydraulic cabinet area of unit (only vapor return associated parts shown for clarity)