16
Fan box installation
Before installation can proceed it will be necessary to remove the fan unit from the
fan box.
Remove the 2 cover retaining screws and withdraw the fan unit. See figure 19
.
Checking inside for any loose unwanted packaging
For transit purposes the weather shield is supplied as a loose part.
Remove this from the loose parts pack and fit to the fan box as described below.
If the fan box is to be sited totally outside the wall fit the brackets with the short
flanges flush with the air intake end of the fan box (see figure 20).
The fan box may be recessed 150mm into the wall. If this is the case, then fit the
brackets with the short legs 50mm from the air outlet face of the fan box (see
figure 21).
Use a hammer and chisel to cut an aperture of 230mm by 280mm.
Place the fanbox in position with the spigot located in the flue pipe. Ensure the
box is firmly located and correctly aligned against the wall, and mark off the
four screw fixing positions on the wall.
Remove the fanbox, Drill at the market positions four holes using a number 10
drill and plug.
Locate cable ties and position fan box to the wall. Feed the electrical cable
through and secure rubber grommet in access hole of fan box. Carefully draw
the loom through the grommet until all excess cable length is contained within
the fan compartment. (see fig.22)
Replace the fan box to the wall, ensuring that the flue pipe and fan box spigot are
fully engaged, and taking care not to snag or otherwise damage the electrical loom.
Align and secure the fan box to the wall and fix using the screws supplied. Make
good around the fan box, ensuring that no gaps appear between the box and wall.
Stow the excess cable as shown in figure 23. Leave about 200mm of free length for
fan motor connection. Secure the stowed cable inside the fan box with cable ties.
Fig. 23
Fig. 22
Fig. 21
Fig. 20
Fig. 19