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Installation, Operating and Maintenance Instructions
3.0 Erection and Assembly
Units must be installed in accordance with good industry practice.
These units may only be mounted horizontally and must be fully
levelled in the horizontal plane.
The units are heavy, and should be mounted using the fixing brackets
supplied or other suitable methods of support.
The supporting structure must be assessed for structural suitability.
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.
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 control enclosure.
NB to avoid conflict with the unit access panels, it is recommended
that electrical and plumbing service connections to the unit are run at
90 degrees to the main air flow axis.
Control circuit connections must be segregated (i.e. routed separately)
from power connections.
The unit rating label shows the maximum electrical load of the
equipment. Connections to the unit may include single phase supply
connections, and control circuits.
Control circuit connections must be segregated (i.e. routed separately)
from power connections.
The equipment must be earthed and earth-bonded. Means of local
isolation for maintenance purposes are generally required (by others).
Ensure that all mains connections are isolated.
4.0 Commissioning & Setting to work
Isolation - Before commencing work make sure
that the unit and Nuaire control are electrically
isolated from the mains supply.
4.1 Filters
Remove filter access panels (observe and note airflow direction labels),
inspect filters for contamination with construction debris, replace as
necessary. Replace access panels.
Filter pressure drops will depend on actual flow rate and condition.
If required, observe and record filter pressure drops after performance
commissioning. Typically, filter "dirty" condition occurs when the initial
filter "clean" readings have been increased by 25Pa.
4.2 Fan Sections
Access to the fan section is via lift off panels.
Wiring to the unit terminal box should be mechanically protected and
in made in accordance with the details on the motor name plate.
With the unit electrically isolated, gently rotate the fan impellers
manually, checking that they spin freely.
Check all fixings are secure.
Units must not be operated without all access panels in place –
damage to equipment or injury to personnel may result.
Units must not be operated unless control interlocks are in place –
damage to equipment may result. Test run motor for condition and
correct rotation. Check that the correct current overloads are fitted
and that the current being drawn does not exceed the motor name-
plate value.
Excessive current normally indicates that the ductwork system
resistance is different to design.
5.0 Unit Wiring
The electrical wiring must be carried out by competent persons, in
accordance with good industry practice and should conform to all
governing and statutory bodies i.e. IEE, CIBSE, COHSE etc.
Connection diagrams are provided on page 4.
2
XB-EFA-8L-BK & XB-EFA-8R-BK
02. 05. 19. Leaflet Number 671702
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