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08. 04. 21. Document Number 671971
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
HTS / HTE
Installation Manual
15
HTE(1/2/3) Extract Terminal Duct Connections
The transition piece should be secured to a suitably rigid structure in
the ceiling void.
The gap between the vertical duct and ceiling cut-out should be fully
sealed with a proprietary low modulus, neutral cure mastic.
The transition piece is supplied with blanking plates. To remove these,
pull out and retain the wire fixing clip and remove plate from the port.
Ensure that unused ports have blanking plates with sealing rings fitted
and wire fixing clip in place.
The semi-rigid ducting is installed by first locating the sealing ring
provided into the second complete groove in the duct outer surface.
Mark the semi-rigid duct at 35mm from the cut end, and push evenly
into the port aperture. When secure, insert the port’s wire fixing clip
to retain the duct. No further sealing of the connection is required or
should be applied.
This duct type is largely self- supporting, and may be readily cut with
a hacksaw and manually formed into swept bends with a minimum
internal radius of approx. 150mm. Compact 90° bend components are
also available from Nuaire with similar sealed port design
(product
code NRDD75-90).
For extended lengths of duct, supports with a maximum spacing of 1m
must be provided.
The duct must not be used to support the weight of the transition
housing or other components. If the duct becomes kinked or crushed,
the affected section must be discarded and replaced.
Once the installation is complete, the facia plate may be attached to
the lower surface of the housing to obscure the cut edges of the ceiling
hole using screw caps provided and screws / plugs appropriate to the
ceiling type.
If required, the facia plate may be carefully trimmed to shape with
metal shears.
4.0 MAINTENANCE
It is important that maintenance checks are recorded and that the
schedule is always adhered to, in all cases, the previous report should
be referred to.
Note and ensure that the position of adjustable louvres is
maintained during the maintenance operation.
4.1 HTS1, HTE1, HTE2 & HTE3 Maintenance
The single supply terminal (HTS1) and extract terminals (HTE1/2/3)
require cleaning only when necessary – vacuum and wipe over with a
clean damp cloth – do not use cleaning agents on these products.
Check for damage and visible obstructions to louvre / grille and rectify /
remove as necessary.
4.2 HTS4, HTS9 & HTS12 Maintenance
As required, clean the visible surface of the terminal - vacuum and wipe
over with a clean damp cloth – do not use cleaning agents on these
products.
Check for damage and visible obstructions to louvres and rectify /
remove as necessary.
4.3 Filter Maintenance
Where a filter has been fitted to a Haven terminal, it will have been
selected for its particular properties and must only be replaced
with a new filter with the same properties.
Failure to observe this requirement will result in compromising the
intended level of Indoor air quality in the occupied space, and may
be detrimental to the health and well-being of occupants.
Filter changing should be carried out in accordance with the system
design requirements, but an annual filter change is the minimum
requirement.
Failure to do so may impair the performance and
energy efficiency of this unit.
The filter is accessed through the hinged lower panel of the terminal.
The panel is hinged at the side opposite to the retaining latches.
Undoing the latches will free the panel and a weight of up to 4kg will be
released.
Whilst manually supporting the panel centrally between the latches,
release them in turn by rotating through 90°.
Gently lower the hinged panel down to its greatest extent.
The filters are 525 x 460 x 80mm and weigh up to 4kg (ePM1 type) and
5kg (E11 type).
Remove the old filter, place in a suitable bag and seal.
Remove the new filter from its packaging and refit in housing.
Lift the hinged panel to its original position and re-secure the latches
(full 90 degree rotation).
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Filter Replacement 1
