3.0 Installation
3.1
Installing the unit
16. Assemble the duct and fittings,
following as closely as possible the
diagrammatic ducting layout. Ensure that
the duct is raised above the ceiling
surface to allow for thermal insulation of
the ducting.
17. If the ducting runs through unheated
areas it will need to be thermally insulated
to preclude condensation occurring and to
minimise heat loss. This requirement
must be observed in the planning and
routing of the duct system.
18. The use of flexible ducting should be
limited to an absolute minimum. If used it
should be fully stretched in order to
minimise pressure loss.
19. Attach the unit to the ceiling slab
ensuring that the airflow direction arrows
on the cover are in the correct orientation
for the internal and external vents.
20. Mate up the ducting as appropriate
ensuring that the airflow is in line with the
directional indicators.
21. Determine the best siting position for
the appropriate control. Normally this
would either be a manual control switch
(NBSW), pull-cord switch (PCSW)
humidity switch (HS6) or speed control
switch (VCON100)
22. Determine the appropriate wiring
connections as outlined within section 4
and wire in accordance with current IEE
Wiring regulations ensuring that the mains
feed is isolated before making any
connections.
