Operating Instructions FLOWSIC100
Gas Velocity Monitor
Assembly and Installation
88012513/03-2008 © SICK MAIHAK GmbH · Germany · All rights reserved 71
3.2.4 Mounting the Purge-air Unit Option
The steps below are only necessary if purged sender/receiver units are required.
The following points must be taken into account when selecting the mounting location:
• The purge-air unit must be mounted at a location with clean air. The intake temperature
must match the values specified in the technical data (see Section 2.6). If necessary, lay
an intake hose at a location where the conditions are more favorable.
• The mounting location must be easily accessible and fulfill all the applicable safety re-
quirements.
• The purge-air unit must be mounted as far below the sender/receiver units as necessary,
so that the purge-air hoses can be installed falling towards the purge-air unit (avoiding
water collection).
• Sufficient clearance must be provided for replacing the filter insert.
• Sufficient clearance must also be provided for mounting and for raising the weatherproof
cover, if the purge-air unit is mounted outdoors (see Fig. 3.15).
Fig. 3.15: Mounting the purge-air unit
Installation work
‡ Prepare the bracket as shown in Fig. 3.15.
‡ Secure the purge-air unit with 4 bolts (M8).
‡ Check whether the filter insert is installed in the filter housing; fit the insert if necessary.
> 160
550
> 140
550
Duct
Purge-air hose
Clearance
for
fitting of
weather-
proof
cover
Clearance for replacing filter insert
Purge-air hose
470
470
50
M 8
Alternative:
retaining bracket
50 x 5 steel pipe
DIN 2391
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