Step
Work step
Special features
Side
6
Attach the SFU to the welding
neck flange
Observe preheating period
4.2
Weatherproof enclosure
Figure 4: SFU-BF NI GL in weatherproof enclosure (closed left and open right)
1
Enclosure cover
2
Enclosure base
3
Tension locks
4
Filter housing
5
Gas sampling tube
6
Ventilation membrane
DANGER
Hazard by voltage
Live parts are accessible after the weatherproof enclosure has been opened.
b
Disconnect the gas sampling unit from the power supply before opening the enclo‐
sure (for example by switching off the measuring system).
CAUTION
Risk of burns on hot surfaces
You can perform the work while the filter is hot.
b
Wear suitable gloves.
Removing the enclosure cover
1
Unlock the tension locks.
2
Pull the enclosure cover away from the gas sampling tube and lift.
Fitting the enclosure cover
1
Fit the enclosure cover in the direction of the gas sampling tube.
2
Lock the tension locks.
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
13
Subject to change without notice
