Test Preparations

The vacuum system is subdivided into 7 test circuit. If a given trouble prevails (e.g. center nozzle not opening) the respective circuit can be tested first. If a leak or functional trouble is suspected in entire vacuum unit, proceed to the individual circuit tests until the fault is found. Function test ACC system after all repairs and tests.

TEST DATA
Permissible leaks per:
Vacuum Circuit [1] 30 mbar/min. (0.9 in. Hg/min.)
Check Valves [2] 50 mbar/10 min. (1.8 in. Hg/10 min.)
Remaiming Components [2] 20 mbar/min. (0.6 in Hg/min.)

References
[1] At 400 mbar vacuum (12 in. Hg)
[2] At 300 mbar vacuum (9 in. Hg)