Automatic changeover valve type AUV-ND
Part No. 02 585 5
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Leak check after changing the gas cylinder
Check for leaks every time you replace a gas cylinder or if the system has not been used for
some time.
1. Close the cylinder valve on the operating side.
2. Open the cylinder valve on the spare side.
3. The AUV-ND indictor changes from
GREEN
to
RED
= spare.
4. Close the open gas cylinder valve on the spare side.
5. Spray the screw connection(s) on the gas cylinder valve and on the AUV-ND with
a foam producing substance according to EN 14291 (e.g. leak detector spray,
part no. 02 601 00).
6. Bubbles will form in the foam-producing substance if there are any leaks.
Test connection for leak tester
A leak tester can be connected to the test connector for pressure and leak tests of the LPG
system.
1. Close all shut-off fittings on the connected devices.
2. Open shut-off valves.
3. Unscrew the cap from the test connector ,
use the test hose to connect the test pump to the test
connector .
4. Turn the twist grip at the check valve downwards
to “OPEN”-position.
5. Check for leaks with a max. of 150 mbar
.
6. When the test has been completed successfully,
turn the twist grip at the check valve back to
“CLOUSED”-position.
7. Then remove test hose of the test pump, screw the cap
back onto the test connector .
START-UP
After the product has been assembled and the LEAK CHECK has been carried out
successfully, it is immediately ready for operation.
All shut-off fittings on the connected devices must be closed.
1. Connect the gas cylinder(s) and check the hoses.
2. Slowly open the gas cylinder valve(s).
3. Observe the assembly and operating instructions of the connected devices.
NOTICE
If you open the gas cylinder valves too quickly, this may result in a short-term pressure
increase, which causes the pressure relief valve PRV to respond.
NOTICE
If LPG is withdrawn too quickly or is continuously withdrawn from the cylinder on the
operating side, the temperature of the gas falls and, as a result, the cylinder pressure
drops below the required inlet pressure of the regulator. LPG is then also withdrawn
from the spare cylinder.
Proper operation of the system is no longer guaranteed.
The LPG cylinders on both sides may be emptied simultaneously or also at
different rates.
The dimensioning and design of the cylinder system (choice of excess flow valve,
nominal flow rate, nominal width, etc.) must comply with TRF 2012.
