Purging Product Lines For Remote Dispensers; Purging Product Lines For Self Contained Systems - Bennett 3700 Series Installation Manual

Purging Product Lines for Remote Dispensers

Once product piping and tanks have been tested for leaks and any leak conditions have been fixed then
the remote dispenser product lines must be purged of all air that may be trapped in the lines. All
electrical connections must be made and verified at this time.
CAUTION! DO NOT USE THE DISPENSER TO PURGE AIR FROM THE PRODUCT LINES.
RUNNING THE METER IN A DRY CONDITION AND AT THE HIGH SPEEDS RESULTING FROM
PRESSURIZED AIR, WILL DAMAGE THE METER AND VOID THE BENNETT LIMITED WARRANTY.
The emergency shutoff valve contains a test port that may be used to bleed off air that may be trapped
in the product lines. Manually close the emergency shutoff valve. Do not leave this process unattended
while purging the air from the product lines. Once liquid fuel product begins to weep from the test port,
retighten the plug in the test port. If more than one dispenser is on a submerged pump product feed
line, start this purging process at the dispenser furthest from the submerged pump and work backwards
toward the submerged pump.
WARNING! Take appropriate measures to contain any product seepage from the test port.
Dispose of any spilled product in proper manner consistent with applicable laws and codes.
Manually open the emergency shutoff valve and lock it into the "on" position according to the instructions
from the valve manufacturer. Use a test prover can or other appropriate approved container to dispense
50 to 100 gallons or 175 to 350 liters through the dispenser. Begin dispensing by only slightly opening
the nozzle to allow any entrapped air in the dispenser to slowly release through the nozzle. This
prevents an over-speed pulser error.
Once the dispenser has dispensed 50 gallons of fuel, the SB100 meter should be tested for calibration.
Refer to the section in this manual for calibration procedures.

Purging Product Lines for Self Contained Systems

Once product piping and tanks have been tested for leaks and any leak conditions have been fixed then
the self contained (suction) dispenser product lines must be purged of all air that may be trapped in the
lines. All electrical connections must be made and verified at this time.
The pumping unit evacuates all the air in the pipe before it gets to the meter. The air is expelled through
the vent at the top of the pumping unit. Nothing but fuel should pass through the meter. The meter will
not turn until fuel enters the pump and pressurizes the system.
WARNING! Take appropriate measures to contain any product seepage from the air elimination
chamber tube. Dispose of any spilled product in proper manner consistent with applicable laws
and codes.
Use a test prover can or other appropriate approved container to dispense 50 gallons or 175 liters
through the dispenser. Begin dispensing by only slightly opening the nozzle to allow any entrapped air
in the dispenser to slowly release through the air eliminator. This prevents over-speeding of the meter.
Once the dispenser has dispensed 150 gallons of fuel, the SB100 meter should be tested for calibration.
Refer to the section in this manual for calibration procedures.
120001 Rev K 1-19-18
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