ADAST V-line 899 LPG HYBRID Series, Руководство пользователя

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USER’S MANUAL V-line 899x.xxx/LPG HYBRID
42
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discharge sediments, water or other contaminants from the tank (containers of fuel) by means of
sludge pumps
13.
MAINTENANCE OF THE DISPENSER AND ITS INDIVIDUAL OPERATING
UNITS – MODULE FOR DISPENSING LPG
The user of the dispenser is obliged to operate the device safely, reliably and in economic way. First of all
he is obliged to:
– appoint a worker responsible for the operation and technical conditions of the dispenser and its
individual components
–
ensure inspection, testing, repairs and maintenance by qualified methods
– carry out records and file documents
ATTENTION!
All repairs of operating units can only be carried out by a service repair shop and their serviceman
with relevant authorisation.
Repairs, changes and dismantlings of undermentioned dispenser units depends of the perfect
propane butane displacement with nitrogen from all space of dispenser hydraulic system.
Since even after the education of nitrogen from the dispenser its residues with minimum pressure
stay in the hydraulic system, it is necessary to come on very carefully at the service interventions.
Marking of space endangered with pressure expansion of residual nitrogen - see the enclosure
no. 7.
13.1. LPG piston flow meter
The LPG meter unit consists of proper meter and integrated impulse detector. It is adjusted by the
producer. Only authorised specialist can handle the metering unit because the meter is officially sealed. If
the seals are damaged, it is necessary to carry out an official inspection and new official sealing.
A trained worker should follow the meter continuously to carry out necessary repairs immediately in case
of any defect. Constant accuracy of the adjusted meter is one million dm
3
at least for measured liquid
without mechanical impurities. It is recommended to check the accuracy of the meter after dispensing
such liquid gas quantity. The meter should be periodically inspected (calibrated) by a metrological office
according to relevant legal regulations - once per year at least.
The impulse sensor is not being repaired - the meter should only be replaced. New official authorisation
(sealing) must be carried out after its replacement.
13.2. Differential valve
The valve is designed to keep the substance in liquid condition in the meter. It also damps pressure
shocks. Only uncompressible liquefied substance of pressure higher (appxm. by 0,1 MPa) than the
counterpressure of gaseous phase as generated by the spring pushing the differential piston into the valve
seat from the side of the gaseous phase allows to shift the valve cone of the differential piston off the
valve seat so that the flow through the valve is open.
All defects of the valve shall be repaired by a professional labourer.
The cover of the valve is protected by a seal of the producer or the service shop against unauthorised
intervention.
13.3. Separator
The separator prevents the inlet of the gaseous phase into the meter.
The separator together with a filter, non-return valve, pressure-release valve and a safety valve for the
gaseous phase form one assembly unit.
ATTENTION!
The filter collects impurities for the substance being pumped. In case the discharge drops, it is
necessary to check the filter, clean or replace it.