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j)
Mounted on the heat exchanger is a round plastic baffle that secures the air intake filters.
The extraction fan adjacent to these filters goes to the outside wall. Use the PVC weld
adhesive to stick the small tube you have cut to length onto the end flange of the extract
fan and allow the adhesive to set. Protect the front cover at all times from dirt and scratches.
Installation -
Continued
k)
Now fit the wall plate to the wall. The wall plate is marked top on the front face. If the
sleeve on the rear wall plate does not fit into the drilled hole, carefully open up the hole in
the plasterwork until the wall plate will fit flush against the wall and is central in the drilled
hole. (Use the remnant piece of large diameter tube as a template to ensure it is central).
Mark out and drill the screw holes and chisel out a groove for the wiring from the cable
entry hole (top left) upwards to the ceiling (or in the direction you have determined for the
transformer or remote control). Fit screw plugs into the screw holes.
l)
Fit the wall plate onto the open end of the large tube with the outside cowl. Measure the
distance from the back edge of the wall plate to the other end of the tube. The tube
should not extend beyond the outside wall finisher.
Use the PVC weld adhesive to stick the wall plate to the outside tube. Ensure that the
outside cowl is the right way up (louvres pointing downwards to avoid rain ingress and the
louvres are level to the wall plate). Push the outside cowl / tube / wall plate assembly into
the hole in the wall. Make sure that top is correctly positioned and pull the cable through
the cable hole, check that there is a small downwards gradient in the tube (see section f).
Screw the wall plate to the wall ensuring that it is level with the ceiling.
It is important to do this now in order to accommodate the angle of the tube in the
back of the wall plate before the glue sets.
