NuAire lpXboxac Instruction Manual

Nuaire Limited Western Industrial Estate Caerphilly United Kingdom CF83 1NA
T: 029 2088 5911 F: 029 2088 7033 E: [email protected] W: www.nuaire.co.uk
1Leaflet Number 671364 October 2007
Figure 1.
lpXboxac
Mechanical Ventilation with Heat Recovery
Installation and Maintenance
Figure 3.
Cut through the
acoustic foam round
the circumference of
the damper.
Damper can be
swivelled on the
2 body casing
hinges.
Fixing screw hole.
Bracket tongues
engage with casing
slots, then unit
rotated up to align
with fixing
screw hole.
Slots in casing
either side of
unit to allow
alternative
mounting option.
Figure 4.
When spigot is in
position, damper can
be adjusted using a
screwdriver.
Figure 2.
Discharge
Supply
Supply
Extract
Extract
Intake
Access covers on underside.
1.0 Introduction
The Nuaire lpXboxac unit is designed to provide
mechanical supply and extract ventilation with heat
recovery.
The unit is fitted with two fans with independant adjustable
speed control. A plate heat-exchange constructed from
aluminium is used to provide up to 70% heat recovery.
2.0 Installation
Installation must be carried out by competent personnel
conforming to all statutory and governing regulations
including the current wiring and CDM regulations.
Special attention must be paid to the size and weight of the
unit and the handling method to locate the unit in situ.
The unit is designed to be ceiling mounted in the horizontal
plane with access panels and condensate drain on the
underside.
The fan must be fitted indoors, away from any direct
sources of heat, water spray or moisture generation.
Temperature range -5OC to 40OC.
Please note a clear working space is required around
the installed unit to allow the cover to be removed and
provide sufficient access for maintenance such as filter
change.
The fan is designed to be wired direct to the mains supply
through a fused spur isolator (by others).
With the unit fixed in position and working from underneath
the installation bring the mains wiring through the chosen
rubber cable entry grommet at the new connection box.
Additional grommeted holes are provided to allow additional
wiring to each blower.
The integral mounting bracket supplied can be offered up to
position, the fixing points marked through and the bracket
installed with 4 screws (by others).
Offer the unit into position and locate the bracket into the
slots in the case before fixing with the single bracket fixing
screw.
Various damper/inlet spigot positions can be utilised as
required to suit the system ductwork and extract grilles.
To reduce air leakage, spigots should be sealed to the unit
by silicone sealant or similar (by others).
All inlet dampers are ’closed’ as knockouts when delivered
but can be opened using a sharp knife. (See figure 3).
After the spigot has been fixed adjust the damper with a
screwdriver. (See figure 4).
See figure 5 for spigot location and sizes.
The condensate drain must be connected via a trap into
either a suitable waste water system or to the outside of
the building. This connection must be detachable to allow
access into the unit. Ensure the pipe from the condensate
drain falls away from the unit.

For good EMC engineering practice, any sensor cables
or switched live cables should not be
placed within 50mm of other cables or on the same
metal cable tray as other cables.
Isolation - Before commencing work make sure
that the unit, switched live and Nuaire control are
electrically isolated from the mains supply.
Please note this product must be earthed.
2Leaflet Number 671364 October 2007
Installation and Maintenance lpXboxac Mechanical Ventilation with Heat Recovery
850
685
637
Bracket
fixing
VIEW FROM UNDERSIDE WITH COVER REMOVED
SIDE VIEW
MOUNTING BRACKET TOP VIEW
Mounting bracket
END VIEW
Single screw unit fixing
185
10
250
4 holes
7.5mm dia.
4 x spigot knockouts 1 x 125mm dia. and 3 x 100mm dia.
for each supply and extract system
Cable entry 20mm
4 x end spigot
knockouts
100mm dia.
Mains
connection
box
125 dia. 100 dia.
extract extract
100 dia.
extract
100 dia.
extract
100 dia.
supply
100 dia.
supply
125 dia. 100 dia.
supply supply
125 dia.
Intake
125 dia.
discharge
Condensate drain 022 OD
Weight: 25kg
N
L
SL
TRICKLE BOOST
ABCDE F G
N
L
SL
TRICKLEBOOST
AB C DEFG
2.0 Dimensions
Figure 5. Dimensions in mm.
N
L
SL
TRICKLE BOOST
A B C D E F G
3.0 Electrical Wiring 3.1 Additional Control Wiring Option
The two fans are pre-wired into an external wiring box for
ease of connection. (see figure 6 for connection details).
All incoming mains connections must be routed through a
suitable local isolator for maintenance purposes.
Units are supplied configured to run on speeds 1 and 3.
To change the duty the links may be removed and refitted
to the other positions. (See table 1).
L
N
2
1
L
N
E
Supply
230V
50Hz
3 pole
isolator 2
1
L
N
Supply fan
boost switch
Extract fan
boost switch
3A fuse
All switches by others
Fan unit
Figure 6.
Table 1.
Figure 7. Circuit Board Connections.
TRICKLE BOOST
SPEED 1–Link B (As supplied) SPEED 3–Link D & F (As supplied)
SPEED 2–Link C SPEED 4–Link G
SPEED 3- Link A & C SPEED 4–Link G

3Leaflet Number 671364 October 2007
Installation and Maintenance lpXboxac Mechanical Ventilation with Heat Recovery
4.0 Maintenance
It is inevitable that even with filtered extract grilles as
recommended in BRE digest 398 some dust, fluff etc. will
pass through the filter, and which, if allowed, will build up
internally on motors and impellers, shortening the life of
the unit and, in severe cases, leading to overheating of the
motors. Consequently, it is strongly recommended that all
units are inspected and cleaned every six months.
It is recommended that the drip-tray and the heat-exchanger
should be inspected, cleaned and disinfected at regular
intervals to prevent a build-up of mould and bacterial
growth.
5.0 Cleaning
Remove covers and carefully clean out interiors as
necessary. To clean the filter, remove from the unit and
wash in tepid water to which a little mild detergent has
been added. Shake out excess water and allow to dry
naturally. Replace when dry. Check for damage and
security of components. Refit covers.
To remove the drip-tray and the heat-exchanger, remove the
screws securing the retainer clips. Take care not to let the
drip-tray and the heat-exchanger drop down. Clean by
washing the parts in tepid water with suitable disinfectant.
Allow to dry naturally before refitting back into the unit.
6.0 Replacement of Parts
Should any component need replacing Nuaire keep extensive
stocks for quick delivery. Ensure that the unit is electrically
isolated, before carrying out any work.
When ordering spare parts, please quote the serial number
of the unit and the ARC number of the purchase if possible.
(This information will be available on the fan label).
7.0 Warranty
The 5 year warranty starts from the day of delivery and
includes parts and labour for the first year and parts only
for the remaining four years. This warranty is conditional
on planned maintenance being undertaken.
8.0 Service Enquiries
Nuaire can assist you in all aspects of service. Our service
department will be happy to provide any assistance required,
initially by telephone and If necessary arrange for an
engineer to call.
Telephone [phone]
Fax [phone]
Technical or commercial considerations may, from time to time, make it necessary to alter the design, performance and
dimensions of equipment and the right is reserved to make such changes without prior notice.

4Leaflet Number 671364 October 2007
We declare that the machinery named below is intended to be
assembled with other components to constitute a system of
machinery. The machinery shall not be put into service until the
system has been declared to be in conformity with the provisions of the
EC Machinery Directive.
Designation of machinery: lpXboxac
Machinery Types: Mechanical Ventilation with
Heat Recovery Unit
Relevant EC Council Directives: 98/37/EC, 98/79/EC
(Machinery Directive)
Applied Harmonised Standards: BS EN ISO 12100-1, BS EN ISO 12100-2,
EN294, EN60204-1, BS EN ISO 9001
Applied National Standards: BS848 Parts One, Two and Five
Signature of manufacture representatives:
Name: Position: Date:
1) C. Biggs Technical Director 20. 07. 07
2) W. Glover Manufacturing Director 20. 07. 07
DECLARATION OF INCORPORATION AND INFORMATION FOR SAFE INSTALLATION,
OPERATION AND MAINTENANCE
DECLARATION OF CONFORMITY
We declare that the machine named below conforms to the
requirements of EC Council Directives relating to Electromagnetic
Compatibility and Safety of Electrical Equipment.
Designation of machinery: lpXboxac
Machinery Types: Mechanical Ventilation with
Heat Recovery Unit
Relevant EC Council Directives: 2004/108/EC (EMC)
2006/95/EC
(Low Voltage Directive)
Applied Harmonised Standards: EN55014-1, EN55014-2,
EN60335-2-80
Basis of Self Attestation: Quality Assurance to BS EN ISO 9001
BSI Registered Firm
Certificate No. FM 149
Signature of manufacture representatives:
Name: Position: Date:
1) C. Biggs Technical Director 20. 07. 07
2) W. Glover Manufacturing Director 20. 07. 07
INFORMATION FOR SAFE INSTALLATION, OPERATION AND MAINTENANCE
OF NUAIRE VENTILATION EQUIPMENT
To comply with EC Council Directives 98/37/EC Machinery Directive and
2004/108/EC (EMC).
To be read in conjunction with the relevant Product Documentation (see 2.1)
1.0 GENERAL
1.1 The equipment referred to in this Declaration of Incorporation is supplied by
Nuaire to be assembled into a ventilation system which may or may not include
additional components.
The entire system must be considered for safety purposes and it is the responsibility
of the installer to ensure that all of the equipment is installed in compliance with the
manufacturers recommendations and with due regard to current legislation and
codes of practice.
2.0 INFORMATION SUPPLIED WITH THE EQUIPMENT
2.1 Each item of equipment is supplied with a set of documentation which provides the
information required for the safe installation and maintenance of the equipment.
This may be in the form of a Data sheet and/or Installation and Maintenance
instruction.
2.2 Each unit has a rating plate attached to its outer casing. The rating plate provides
essential data relating to the equipment such as serial number, unit code and
electrical data. Any further data that may be required will be found in the
documentation. If any item is unclear or more information is required, contact
Nuaire.
2.3 Where warning labels or notices are attached to the unit the instructions given must
be adhered to.
3.0 TRANSPORTATION, HANDLING AND STORAGE
3.1 Care must be taken at all times to prevent damage to the equipment. Note that
shock to the unit may result in the balance of the impeller being affected.
3.2 When handling the equipment, care should be taken with corners and edges and that
the weight distribution within the unit is considered. Lifting gear such as slings or
ropes must be arranged so as not to bear on the casing.
3.3 Equipment stored on site prior to installation should be protected from the weather
and steps taken to prevent ingress of contaminants.
4.0 OPERATIONAL LIMITS
4.1 It is important that the specified operational limits for the equipment are adhered to
e.g. operational air temperature, air borne contaminants and unit orientation.
4.2 Where installation accessories are supplied with the specified equipment eg. wall
mounting brackets. They are to be used to support the equipment only.
Other system components must have separate provision for support.
4.3 Flanges and connection spigots are provided for the purpose of joining to ductwork
systems. They must not be used to support the ductwork.
5.0 INSTALLATION REQUIREMENTS
In addition to the particular requirements given for the individual product, the
following general requirements should be noted.
5.1 Where access to any part of equipment which moves, or can become electrically live
are not prevented by the equipment panels or by fixed installation detail
(eg ducting), then guarding to the appropriate standard must be fitted.
5.2 The electrical installation of the equipment must comply with the requirements of the
relevant local electrical safety regulations.
5.3 For EMC all control and sensor cables should not be placed within 50mm or on the
same metal cable tray as 230V switched live, lighting or power cables and any
cables not intended for use with this product.
6.0 COMMISSIONING REQUIREMENTS
6.1 General pre-commissioning checks relevant to safe operation consist of the following:
Ensure that no foreign bodies are present within the fan or casing.
Check electrical safety. e.g. Insulation and earthing.
Check guarding of system.
Check operation of Isolators/Controls.
Check fastenings for security.
6.2 Other commissioning requirements are given in the relevant product documentation.
7.0 OPERATIONAL REQUIREMENTS
7.1 Equipment access panels must be in place at all times during operation of the unit,
and must be secured with the original fastenings.
7.2 If failure of the equipment occurs or is suspected then it should be taken out of
service until a competent person can effect repair or examination. (Note that certain
ranges of equipment are designed to detect and compensate for fan failure).
8.0 MAINTENANCE REQUIREMENTS
8.1 Specific maintenance requirements are given in the relevant product documentation.
8.2 It is important that the correct tools are used for the various tasks required.
8.3 If the access panels are to be removed for any reason the electrical supply to the
unit must be isolated.
8.4 A minium period of two minutes should be allowed after electrical disconnection
before access panels are removed. This will allow the impeller to come to rest.
NB: Care should still be taken however since airflow generated at some other
point in the system can cause the impeller to “windmill” even when power is not
present.
8.5 Care should be taken when removing and storing access panels in windy conditions.