CNG dispensers TATSUNO EUROPE ‐ Quick User Guide
21
The most frequent delivery termination is during filling the full
storage tank when the gas flow rate drops under the set value
(4) at dispensers without temperature compensation and
delivery termination by attaining the maximum possible gas
mass calculated by temperature compensation (5). In both
cases delivery termination is signalled by the “FULL” message
on the product unit price display.
Delivery is finished by hanging the delivery nozzle to the
dispenser.
NOTE
Delivery with temperature compensationis performed so that the dispenser shall verify the
situation in the vehicle storage tank by a small amount of gas at the beginning of delivery and
calculates the maximum gas mass which it is able to deliver under given ambient temperature. After
attaining the maximum mass, it finishes the delivery and shows the “FULL” message. According to
technical rules of TPG 304 02 art. 4.5.4 the limit values in the Czech Republic for calculating maximum
gas mass in the vehicle are as follows:
a) maximum gas pressure converted to 15 °C – 20.0 MPa
b) attain maximum overpressure in a vehicle 26.5 MPa
c) attaining maximum gas temperature in a vehicle 82 °C
NOTE
According to ISO/DIS 16923, par. 7.5 CNG dispensers must be equipped with a breakaway coupling
located between the delivery nozzle and the dispenser. This breakaway coupling disconnects the gas flow rate
at both ends in case of emergency. The force that causes breaking the coupling must be higher than 220N and
lower than 600N. CNG dispensers are standardly equipped with a breakaway coupling with a magnetic sensor
of breaking. After breaking the hose the delivery is immediately terminated (magnetic valves are closed) and the
display shows the error message E67.
RESPONSIBILITIES OF CNG DISPENSER ATTENDANTS
Observe operating rules and regulations and operating instructions of gas devices.
Keep the operated devices in a safe and proper condition.
Immediately inform the operator about each defect, failure or abnormality during operation.
Immediately decommission the device in case of gas leak or danger.
Keep tidiness and cleanliness and ensure that no unauthorized persons are nearby the device.
Inform the operator about circumstances that impede the device operation for the attendant.
Properly write records to the log book about the shift start and finish, inspections, repairs and audits.
The dispenser and reservoir attendant must not perform any repairs or change the device and safety fittings
setting on his/her own.
Regularly check the condition of delivery hoses, their correct position in the dispenser and protect then from
damage.
406
.
1
15
.
326
€
Kg
€/kg
FULL
