M&C TechGroup SP3200 Operator's manual - Manual (Page 19)

2-1.3.9-ME Gas sampling and gas conditioning technology 19
moved completely and then refitted.
Then check the connection for leaks.
The sample line is connected as follows:
 Loosen the toggle-type fasteners on the isolating cover and remove the cover.
 Loosen the thumb screw of the heat conducting plates and remove the plates.
 Screw a suitable union into the probe head using sealing tape.
 Remove the top part of the sample line mounting clamp and insert the sample line through the sili-
con cap in the bottom part of the bracket plate and into the union.
 Screw off the top part of the mounting clamp. In the case of larger sample line diameters it might be
necessary for centric mounting of the sample line to move a little the small mounting bracket of the
mounting clamp after having loosened the two screws and then tighten again.
 Connect the line to the union. For Swagelok
® fittings:
- Insert the line with supporting sleeve fully into the union.
- Tighten the union nut finger-tight.
- Before tightening, mark the union nut in 6 o’clock position.
- Grip the body with a spanner and tighten the union nut by 1¼ turns; after a full turn, the mark-
ing must be turned further to 9 o’clock position.
 Then place the heat conducting plates in the guide slots on the side of the sample gas connection
and tighten with the thumb screw.
A supporting sleeve must always be used when connecting hose assemblies to stainless steel
unions.
The connection must be checked for leaks.
When using the option backflushing unit /RS the corresponding line must be connected to the accumulator.
A backflushing gas suitable for the sampling point must be selected for backflushing.
The backflushing pressure must always be higher than the process pressure. This minimum
pressure must be monitored at the inlet side of the accumulator with a pressure monitoring
switch. If the flush gas pressure drops below the process pressure, the backflushing solenoid
valve must not be operated.