16
Installation Instructions ACF-NT, ACF-NT V0309
42/23-571 EN Rev. 5
Installing the Gas Sampling Probe and Filter Unit
Choosing the
Extraction Point
The extraction point must be suitable for extracting a representative specimen
flow.
The probe tube must be easily accessible to allow maintenance work to be
performed.
Protect the filter unit FE2 against direct heat radiation, rain, draught and extreme
contamination. If necessary, protect the filter unit with a protective box.
In the case of emission measuring devices the responsible technical inspection
association specifies the extraction point.
Installing the Gas
Sampling Probe and
Filter Unit
Follow the “Piping Plan” in the system documentation.
Install the wall tube with mounting flange (DN 65, PN 6, type B according to
DIN 2573) at the extraction point in such a way that the probe tube can be easily
installed and removed.
Minimum distance x of the mounting flange from the wall as a function of the
installation angle
(see Figure 1):
Installation angle
in
°
10 15 20 25 30 35
Minimum distance x in mm
229 248 268 287 307 324
Align the boreholes of the mounting flange in relation to the flow direction of the
process gas.
Mount the gas sampling probe and filter unit:
The weight of the pre-assembled probe tube with filter unit amounts to ap-
prox. 20–32 kg! Two persons are needed for transportation and mounting!
Probe tube type 40 (see Figure 2): Insert the pre-assembled probe with filter
unit into the wall tube and screw the flange of the filter unit to the mounting
flange.
Heated probe tube type 42 (see Figure 3): Insert the probe tube into the wall
tube and screw it to the mounting flange. Mount the filter unit to the flange
and fasten it.
Connect the electrical leads of the gas sampling probe and the filter unit follow-
ing the “Wiring Plan” and “Terminal Plan” in the system documentation.
Continued on next page
