Gas Vent Ducts - ABB UniSec Manual

4.5.7 Re-installing the roof plates
The installation operations are as follows:
1) Install the roof plate.
2) Remount the screws detached during dismantling.
3) For the end and isolating units:
Install the double roof plate with the fire protection plates on
top of the normal roof frames. No plate screwing is required
(double plate is not used with the non IAC proof or with the
IAC AFLR 12.5 kA version).
Make sure that the double roof plate is positioned as shown in
Figure 83.
Figure 83. Installation of fire protection plate and double roof plate
Make sure that the bent edges of the double roof plate are
completely under the plate.
4) Install the roof joining plate with six screws (Torx screws
M6x12).
Figure 84. Outline of roof joining
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4.6 Gas vent ducts

4.6.1 Installation of the gas vent ducts
The gas vent ducts are usually already installed.
a) Install the vertical part of the gas vent duct.
Figure. 85. Installation of the vertical gas vent duct
b) Install the bottom plate of the vertical part of the gas vent
duct as shown in Figure 86.
Figure 86. Installation of the bottom plate