4.4.2
Connection of sample gas line
Figure 8: Sample gas connection SFU-BF NI
GL in weatherproof enclosure
1
Insulating shell
2
Clamping ring screw connection
3
Sample gas line
4
Cable gland with cap nut, small
5
Cable gland with cap nut, large
NOTE
If you lay the heated sample gas line before installing the gas sampling unit: Observe
the installation of the sample gas line:
b
Start laying at the measuring system:
°
The end
with
electrical connection is connected to the measuring system.
°
The end
without
electrical connection is connected to the gas sampling unit.
Roll up excess length at the gas sampling unit.
Leave enough length for pulling out the gas sampling unit (approx. 2 m).
b
Protect the line from damage (chafing through vibration, mechanical and thermal
load).
b
Observe a minimum bending radius of 300 mm.
1.
Remove the enclosure cover (
see "Weatherproof enclosure", page 13
2.
Unscrew the large cap nut and slide it onto the sample gas line.
3.
Unscrew the insulation half-shell.
4.
Feed the sample gas line through the large cable gland of the weatherproof enclo‐
sure and then through the installation plate and the hose clamp.
5.
Screw the sample gas line tight on the clamping ring screw connection.
°
For first screwing (clamping ring still loose): 1¼ turn to "hand-tight".
°
For further screwing: (clamping ring tight) ¼ turn to "hand-tight".
6.
Fasten the sample gas line using a hose clamp. The screw head can be reached
via an opening in the chamfer of the installation plate.
7.
Screw the insulation half-shell back on again.
8.
Tighten the cap nut hand-tight.
9.
Check hose connections for leaks:
The leak tightness check is performed via the connected measuring system: See
the Operating Instructions of the measuring system.
INSTALLATION AND START-UP
4
8023849/14SF/V1-1/2019-07 | SICK
O P E R A T I N G I N S T R U C T I O N S | SFU
17
Subject to change without notice
