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User Manual Series F-BO-AFE70
5
Final assembly, mechanical structure and dimensions
5.1
Final assembly
For reasons of safe transport, the pipe connecting components are enclosed and still have to be
installed.
Figure 4 gives an overview of the structure of a Purging unit after final assembly.
In order to assemble the device, proceed as follows:
Remove the two M3 screws from the cover and lift the cover of the Purging unit.
Screw a pipe nipple G3/4"×34mm by hand into the thread of the 25mm push-in fitting as far as it
will go and completely push the plastic gasket Ø32mm×10mm onto the pipe nipple.
Remove the protective cover from an opening of the housing; keep the protective cover for later
use.
Now screw the part of the pipe nipple's thread that protrudes from the plastic gasket by hand into
one of the two fitting threads of the Purging unit's body as far as it will go.
Use a wrench of the right size (wrench size 32mm) to turn the 25mm push-in fitting by approxim-
ately another 30° until it seats tightly and seals perfectly.
Repeat the procedure described above for the other side of the Purging unit.
Cover the openings of the 25mm push-in fittings with the protective covers and only remove the
protective covers just before connecting the sensor pipe network.
By carrying out this step, the final assembly has been completed.
It must be ensured that after final installation of the Purging unit, no push-in fitting can be
loosened by hand, and that all push-in fittings are perfectly sealed. Therefore, check the
tight seat of the push-in fittings after final assembly and prior to commissioning.
You must never use any glue for the connections of the sampling pipes on the Purging unit and
on the aspirating smoke detector.
The warranty claims shall terminate in case of violation of this rule.
I56-4252-010
D200-104-00
Chapter 5 • Final assembly, mechanical structure and dimensions
19
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