ABB GAA330-M Operating Instructions Manual page 32

32
Procedures for laying the sample gas line
GAA330-M EMISSION MONITORING SYSTEM
Incorrect
Do not lay the heated sample gas
lines directly side-by-side in an en-
closed duct or shaft. This results in
heat accumulation.
Prevent powdery substances, adhe-
sives or other thermally insulating
materials from soiling the heated
sample gas line. Otherwise,
over\-heating will occur at these
points.
Avoid heat accumulation through
wrapping the heated sample gas line
with other materials, otherwise the
sample gas line will overheat at these
points. Do not cover the area near
the temperature sensor, otherwise
the rest of the sample gas line will
cool down.
Do not lay the heated sample gas line
in a wall break-through which is
subsequently sealed with a sealing
compound under any circumstances.
The sample gas line will be destroyed
by overheating in this case!
| OI/GAA330-M-EN REV. C
Correct
Ensure that the hoses do not touch.
Maintain a distance of 25 mm.
Provide adequate ventilation. Heat
can be conducted away as a result.
If soiling occurs, clean the materials
and remedy the cause. Heat can be
conducted away again as a result.
Do not wrap the sample gas line. En-
sure that the area near the tempera-
ture sensor is exposed.
This results in error-free temperature
measurement.
When laying the heated sample gas
line through a wall break-through, use
bulkhead plates with conduit thread
cable glands, in order to provide ad-
equate cooling of the sample gas line.