Operating Principle - Leister VACUUM BOX Instrucciones De Funcionamiento

Operating principle

Testing is carried out with the transparent VACUUM BOX (2) or VACUUM BELL (2), which is connected to the
VACUUM PUMP (1) using the hose (7). To make sure the testing area is completely air-tight, the VACUUM BOX
(2) and the VACUUM BELL (2) feature a sealing lip (5) on the contact surface. During the test, the VACUUM PUMP
(1) creates negative pressure inside the VACUUM BOX (2) / VACUUM BELL (2).
Preparing and commissioning the VACUUM BOX / VACUUM BELL with VACUUM PUMP
Danger of injury from plastic fragments during commissioning.
Excessive negative pressure or damaged plastic glass may lead to implosion.
Protect the equipment from mechanical damage such as an impact or fall. Do not use the
VACUUM BOX or VACUUM BELL if they are defective.
Wear protective goggles. Danger of implosion
Connect the device to an outlet with a protective conductor. Any interruption of
the protective conductor inside or outside the device is dangerous!
Use extension cables with protective conductors only!
• Open the case. The VACUUM PUMP (1) is mounted inside the case (3) and must not be removed for use.
• The cooling air intake of the VACUUM PUMP (1) must never be obstructed or clogged. (Fig. A)
• Check the hose (7) for damage.
• Check the VACUUM BOX (2) / VACUUM BELL (2) for any faults (such as cracks, fissures, or scrapes) before
every use. A defective VACUUM BOX (2) / VACUUM BELL (2) may cause an implosion.
• Before every use, check that the regulating relief valve (8) can easily be moved manually by pressing on the
lock nut (11) with your hand. The regulating relief valve (8) should now open and close. If you find it difficult
to do this, clean the valve or replace it. (Fig. B)
• Set the adjusting nut (10) of the regulating relief valve (8) to the minimum pressure before every use (Factory
setting 0.2 bar). To do this, the adjusting nut (10) and lock nut (11) must be screwed counterclockwise up to
the top end of the grub screw. (Fig. C)
Fig. A
• Prior to commissioning, check the power supply cord, the plug, and the extension cable for electrical and me-
chanical damage.
• Connect the hose to the VACUUM BOX (2) / VACUUM BELL (2) (Fig. E) and the VACUUM PUMP (1) (Fig. D).
• Connect the VACUUM PUMP (1) to nominal voltage. The nominal voltage specified on the device must match the
mains voltage. (CAUTION: Pump starts immediately)
12
Fig. B Fig. C
11
10
Fig. D Fig. E