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09. 06. 21. Document Number 671786
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
XBC75 & 85 (AS Control)
Installation Manual
5.0 ACCESS CONCEPTS
In this product range, several unique concepts have been
implemented with a view to simplifying the installation design.
Isolate before removing any panels
•
The unit must be installed with at least 650mm clearance from a
wall / barrier. With this absolute minimum clearance, the unit may
be connected to the power supply and control connection.
1000mm clearance is required to remove the LPHW coil and
electric heater.
•
With this clearance, unit filters may be changed, and the fans
coils, heat exchanger and condensate tray may be inspected and
cleaned if necessary.
•
The LPHW and Electrical heater settings, coil bleed and drain, and
all other control adjustments are similarly accessible.
•
Side access, where possible, is preferred in all cases in terms of safe
working access to the equipment under the CDM regulations.
•
Note however, that access in the situation is difficult and
additional time should be allocated. For convenience it is preferred
that wherever possible, this minimum access provision is not
adopted, and it is recommended that a minimum of around
600mm clearance (as stated in ADF 2010) is allowed.
•
Where these arrangements are not suitable, the Consultant’s
and Contractor’s project specific requirements will always be
accommodated where possible.
5.1 Horizontal Units (e.g. XBC75-H, XBC85-H)
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Horizontal Unit Access
Access covers on both sides of the fan unit
Control cover
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Horizontal Unit Overview With Lid Removed Showing Air Paths
Intake
Extract
from room
Exhaust
Supply
to room
G4 Filter
Counterflow
Heat Exchanger
8mm outside dia.
condensate drain.
Condensate pump
fitted as standard
with alarm facility
Control
LPHW or Electric Heater Battery
5.2 Vertical Units (e.g. XBC75-V, XBC85-V)
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Vertical Unit Access
All access panels
are located on one
side of the fan unit
Note: Unit must be isolated before panels are removed.
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Vertical Unit Overview With Lid Removed Showing Air Paths
Side View
Internal control
panel
Intake
Supply
Extract
Discharge
End View
G4 Panel Filter access
Slide out fans
LPHW or Electric
Heater Battery
Base Frame
(76mm High)
8mm outside dia. condensate drain.
Condensate pump fitted as standard
with alarm facility.
6.0 MECHANICAL INSTALLATION
Installation must be completed by competent persons, in accordance
with good industry practice and should conform to all governing and
statutory bodies i.e. IEE, CIBSE, etc.
The unit will be labelled with the direction of air flow. The direction
convention must be observed during installation.
The unit may only be operated in its intended horizontal
installation plane. The unit MUST be fully levelled during
installation (this is essential to ensure that condensate drains
correctly).
The units are heavy, and should be mounted using suitable methods
of support. The supporting structure must be assessed for structural
suitability.
If these units are being fitted into a ceiling void a suitable support
structure must be provided under each unit, the base frame provided is
NOT suitable
for this purpose.
LPHW Coils, if fitted, are tested during manufacture to 16 Bar (using
dry compressed air). Coil and valve assemblies are similarly tested to 10
Bar. Operation of standard equipment is rated at PN6, if the intended
system requires higher operating pressures; please contact the Nuaire
Technical department for advice.
Electrical connections to the unit shall be made in accordance with the
appropriate product; and installation wiring diagrams, and shall use
appropriately sized and rated cables.
Only the prepared apertures in the unit casing may be used for cable
entry. Do not drill or cut the unit casing for this purpose. Cable access
points are provided at the ends of the control enclosure.
