Gasboy Atlas Fuel Systems Installation Manual - Manual (Page 52)

Installation Purging Air from System
Page 6-22 MDE-4331M Atlas® Fuel Systems Installation Manual · September 2014
Purging Air from System
For New Dispensers (Purging Through Shear Valve)
Programming changes in electronic dispensers must be complete before purging can be
started.
To prepare for purging, perform the following procedure for each shear valve in all units. Be
observant during purging and check for plumbing leaks as you move toward the tank. Ensure
that prices are set (by the ASC) before you begin purging for electronic units.
To purge air in new dispensers, proceed as follows:
1 Turn off all power to the STPs involved.
2 Start with the unit farthest from the tank.
3 Use a UL-approved sealant to connect a “gasoline-suitable, conductive hose” to the shear
valve test port.
4 Install the mechanical valve (petcock) to the hose. Ensure that it is closed at this point.
5 Place the drain end of the closed valve in an approved metallic container. Clean up any spills
promptly.
6 Return power to the STPs. Activate the STP for the line being purged.
7 Slowly open the mechanical valve until you obtain a slow, constant stream of fuel flow, while
maintaining contact between the metallic valve and the can.
Purging Air in DEF Systems
Air passing through a DEF meter will trigger an immediate error code. Therefore, you must
temporarily replace the meter pulser outlet to the Atlas 9800 CPU board with a standard
Gasboy Atlas pulser, to properly purge the air from the system. To install a standard Atlas
pulser, proceed as follows:
1 Remove power to the unit.
2 Remove the pulser data connection at the Atlas 9800 CPU board and replace with a standard
Atlas pulser.
3 Restore power and activate the dispensing position.
4 Slowly hand spin the pulser to allow air to be purged through the system with the nozzle
activated.
5 Purge the air, following the normal procedures, until DEF with minimal air is being dispensed.
6 Remove power to the unit.
7 Remove the temporary pulser and replace with the data connector from the coriolis meter.