Page 10 / 19
26.12.2011
LFM-02-e
Rev Nr: 7
block valve.
2.5 Meter startup and operation
Make sure that all necessary safety precautions have been taken. Make sure that proper
ventilation, fire prevention, fire procedures and evacuation paths are provided.
Open the vapor line.
Check all connections with a soap solution for leaks.
Admit liquid slowly into the system by opening the ball valve of the supply line. As there
may still be some air or nitrogen in the system it is important to control the flow to prevent
damage to the meter. Make sure that the meter does not run faster than 25% of its rated
flow. Air or nitrogen should be eliminated gradually and carefully.
After air or nitrogen is removed and the system is full with LPG it can run within its
specified parameters.
Perform this sequence at first start up and after internal pressure has been relieved (also
see 2.6.1).
Most systems use an above ground or submersible pump. Make sure that the pump can operate
against closed valves or with limited flow.
2.6 Meter maintenance
Make sure that all internal pressure is relieved before disassembly or inspection of any part of the
hydraulic system. Failing to follow this instruction may lead to severe personal injury or property
damage.
ALWAYS disconnect and lock power supply before starting to service the meter and other
hydraulic parts.
2.6.1
Procedure for relieving internal pressure
Unless permitted by (local) regulations, relieving internal pressure should not be done to the
atmosphere. Check local regulations, standards and codes for the permitted procedure of
degassing LPG hydraulics.
This procedure describes purging the hydraulic system
with nitrogen:
Record the totalizer readings from the
dispenser in coordination with the station
manager.
Open the front and rear panel of the dispenser.
The rear panel should be opened as well to
ensure proper ventilation.
Remove the plug from the dispenser test port.
Connect the nozzle of the dispenser to the
maintenance port in the dispenser cabinet.
