3
17. 06. 15. Leaflet Number 671424
Installation, Operating and Maintenance Instructions
XBOXER Run Around Coil
Isolation - Before commencing work make sure
that the unit and Nuaire control are electrically
isolated from the mains supply.
1
2
3
Use nuts and studs
to join plates of
facing sections.
Unit base frame.
Slot Fishplate into ends of
base frames and bolt together.
Figure 9. Installed weatherproof roof components.
3.2 Assembly of Equipment
SQURBO XBOX unit sections will be delivered to site in 3 sections
shown below.
The sections consist of:
1.
Extract Fan section,
2.
Run Around Coil section,
3.
Supply Fan section (includes heater if specified).
Each Section will be labelled with the direction of air flow.
The
direction convention must be observed during assembly. The
units may only be operated in their intended installation plane.
Figure 7. Unit sections shown without weatherproof roof.
Sectional units are supplied with matching internal connection
plates with a single bolt hole provided to each corner through
which the sections are bolted together. Unit access panels must be
removed to perform the assembly operation plates will either have
clearance holes - or one face with a threaded insert and the other
with a clearance hole.
A sealing gasket should be applied as necessary to the mating
faces of the unit frames before bolting together.
Figure 8. Section assembly plate.
Weatherproof units (see figure 9) in multiple sections will have
sectional roof components that must be fitted and sealed after
the unit sections are bolted together.
All necessary self drilling screws and sealant are supplied with
each unit and are normally bagged and located within the fan
section.
The equipment must not be exposed to the weather in an
un-assembled or partially assembled state.
All ductwork, sealing and assembly work must be completed before
the unit can be considered weather-proof.
Pipe-work connections to heating and / or cooling coils shall be
made to the appropriate standard, and the entire circuit tested for
tightness. Care must be taken not to over-tighten and distort
connections to coils.
LPHW Heating Coil Flow and Return Connection size
(Standard Coil)
R4-RAC 2 row as standard
= 54mm
R5-RAC 3 row as standard
= 67mm
R5-RAC 2 row as standard
= 67mm
Connection sizes for other coil types are project specific.
Coils are tested during manufacture to 16
Bar (using dry compressed air). 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 (see below); and installation
wiring diagrams, and shall use appropriately
sized and rated cables.
The unit rating label shows the maximum
electrical load of the equipment.
Connections to the unit may include three
phase and single phase supply connections,
and a variety of control circuits.
Control circuit connections must be
segregated (i.e. routed separately) from
power connections.
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.
The equipment must be earthed and earth-bonded.
Means of local isolation for maintenance purposes are generally
required.
