27
8008250/1F7Y/V4-0/2022-06 | SICK
O P E R A T I N G I N S T R U C T I O N S | GM901
Subject to change without notice
MOUNTING
5
5.5
Installing the purge air unit
5.6
Installing the GM901 CO measuring device
Adjust the GM901 beforehand to ensure trouble-free installation and, most important,
commissioning. A CO-free environment must be available for this zero adjust. The
adjustment can be made directly at the sampling point when the plant is switched off and
the duct free from CO (
see “Starting zero adjust”, page 41
Fig. 9: Installing the purge air fixtures on the flange with tube
1
Purge air unit is installed,
see “Installing the purge air unit”, page 27
.
2
Push the purge air hoses onto the purge air fixtures and fasten with hose clamps.
3
Switch the power supply for the purge air unit on,
see “Electrical connection of the purge
4
Check that purge air is available on the purge air fixtures of the sender and receiver
5
Pull the rubber band onto the flange with tube.
6
Push 4 cup springs on each of the 3 threaded bolts.
7
Position the purge air fixtures of the sender and/or receiver on the flange.
8
Push spherical washers onto the 3 threaded bolts.
9
Turn in the self-locking nuts (SW17) and tighten so that a gap of 8.5...10 mm is between
both flange plates.
10
Pull the rubber band over this connection gap.
NOTE:
For information on the purge air unit, see the Operating Instructions of the purge air unit
(SLV4).
Flange with tube
Purge air fixture
Cup springs
Rubber band
Self-locking nut with
spherical washer
Purge air connection
