Operation Manual VISATRON® VN115/87plus EX
06/2016
Page 51
SCHALLER AUTOMATION
D-66440 Blieskastel / Saarland / Germany / Industriering 14 / P.O Box 1280
Industrielle Automationstechnik GmbH & Co. KG
Tel. +49(0)6842-508
-
0
/ Fax -260 / eMail: [email protected] / www.schaller.de
On a VN115/87plus EX installation the tightness of the suction system can be
determined by a pressure measurement at the outer siphon blocks or at the end of
the header pipes.
This siphon block has an additional fitting for a manometer (see
). To
remove the 17 mm lock nut you have to counter the 19 mm nut with a jaw wrench.
The pressure measurement procedure can also performed at the end of the 22 mm
diameter suction pipes which are delivered from SCHALLER AUTOMATION. These
pipes have also fittings for the manometer at the pipe end (see
Use only a digital manometer with a differential measuring method. On completion
do not forget to lock all openings.
The minimal negative pressure values are defined in the table below. They are only
valid if a negative pressure of
60 mm WC
is adjusted at the measuring head.
Minimal suction pressure
at the far left and right end
of the suction tubing system
VN115/87plus EX >6.5 mmWC
7.4
Factory test at engine builder with fog machine on all installations
This test includes the indication of an oil mist alarm as well as the indication of the
affected compartment. Instead of the above mentioned smoke generator you have
to use the more powerful fog machine (see
) with a fog bag with adapter
Figure 53:
optional Fog machine
Figure 54:
optional Fog bag adapter
This equipment guarantees a constant fog concentration during the test and due to
high density no influence of the additionally sucked in crankcase atmosphere.
