NuAire MRXBOX-AV4 Instruction Manual

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28. 07. 20. Document Number 671814Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-AV4
Anti-Vibration Mounting Assembly For
MRXBOXAB-ECO4 Units
Installation and Maintenance
1.0 SAFETY INFORMATION
• This appliance should not be used by children or persons with reduced physical, sensory or
mental capabilities or lack of experience and knowledge, unless they have been given supervision
or instruction concerning the safe use of the appliance by a person responsible for their safety.
Children shall not play with the appliance. Cleaning and user maintenance shall not be carried
out by children.
1.1 Symbols
REFER TO INSTRUCTION MANUAL
Read and understand the installation and maintenance manual before installing,
operating or maintaining this product.
1.2 Important Information
This manual contains important information on the safe and
appropriate assembly, transport, commissioning, operation,
maintenance, disassembly and simple troubleshooting of the product.
While the product has been manufactured according to the accepted
rules of current technology, there is still a danger of personal injury or
damage to equipment if the following general safety instructions and
the warnings contained in these instructions are not complied with.
•Read these instructions completely and thoroughly before
working with the product.
•Keep these instructions in a location where they are accessible
to all users at all times.
•Always include the operating instructions when you pass the
product on to third parties.
1.3 Personal Protective Equipment
The following minimum Personal Protective Equipment (PPE) is
recommended when interacting with Nuaire product:
•Protective Steel Toed Shoes - when handling heavy objects.
•Full Finger Gloves (Marigold PU800 or equivalent) - when
handling sheet metal components.
•Semi Fingerless Gloves (Marigold PU3000 3DO or equivalent)
- when conducting light work on the unit requiring tactile
dexterity.
•Safety Glasses - when conducting any cleaning/cutting operation
or exchanging filters.
•Reusable Half Mask Respirators - when replacing filters which
have been in contact with normal room or environmental air.
Nuaire would always recommend a site specific risk assessment by a
competent person to determine if any additional PPE is required.
2.0 INTRODUCTION
Nuaire’s MRXBOX-AV4 is designed for use with MRXBOXAB-ECO4
MVHR units. The product offers a method of installation that isolates
the unit from the structure of the property and accommodates both
wall and floor mounting.
3.0 MECHANICAL INSTALLATION
Installation must be carried out by competent personnel in
accordance with the appropriate authority and conforming to all
statutory governing regulations.
Please note a clear working space is required around the installed
MRXBOXAB-ECO4 unit to allow the cover to be removed and provide
sufficient access for maintenance such as filter change. Please allow a
minimum of 480mm in front of the unit.
The hanging brackets of the MVHR unit and any ancillary silencer are
redundant when fitting the MRXBOX-AV4 and should not be used.
The fan must be installed indoors, on a suitable wall away from direct
sources of frost, heat, water spray or moisture generation.
For specific installation requirements of the MVHR unit to be installed
please refer to the installation and maintenance guide supplied with
the unit, the document covers additional items including access
requirements, airflow configurations, condensate drainage, electrical
connection and maintenance requirements that may influence the
location the MRXBOX-AV4 is to be installed.
Care must be taken to ensure the unit is installed true in all three
dimensions; failure to do so may result in overflow from the
internal condensation drip tray. To allow the anti-vibration mounts
to operate effectively no part of the MVHR unit should be in direct
contact with the building structure including any boxing in of the
duct connections, the only component of the assembly that should
be in contact is the mounting bracket.
3.1 Installation Procedure
All items referenced below including relevant fixings are supplied with
the MRXBOX-AV4, the exception being the fixings to secure the wall
brackets and the frame/plinth for floor mounting as these are specific
for the individual installation.
Fit 4x Anti-vibration (AV) mounts to the base of the MVHR using 8x
M8 screws pre-fitted in the base panel. If AV mounts are not required
skip the above step and proceed to Section 3.3 on page 2 "Wall
Mounting" to see how the MVHR unit can be secured direct to the
angle brackets)
If any Ecosmart products are to be used the connection to the

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28. 07. 20. Document Number 671814Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-AV4Installation Manual
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2
3
4
5
Support Tray
MVHR Unit & Support Tray
MVHR Unit & Support Tray Dimensions (mm)
Floor Mounted Unit
Wall Bracket Dimensions (mm)
4x Rubber stand offs
Support tray
4x Anti-vibration mounts
2x Fixing points
Support tray
MVHR unit
Rear hanging bracket
supplied with MVHR
should not be used
9 dia.
2525 585
33 49 49 03
3x Fixing positions per bracket
Left hand bracket
Cross brace
2x Fixing positions
Right hand bracket
MVHR unit should be made at this point as this is situated on the
rear panel and access may be restricted when in place.
3.2 Floor Mounting
If floor mounting, the assembly is now complete and can be secured to
41 0
79
640
= =
Standard Configuration Shown,
For Opposite Handed Units (OH) The Condensate Drain Is Located On Opposite Side
Bottom View
1 8
666 25
25
30
1 21
1 21
33
3
9
3x Fixing positions per bracket
the desired frame/plinth (not provided) using the 4x M10 screws with a
plain and serrated washer for each of the threaded AV mounts (Figures
3 & 4).
3.3 Wall Mounting
The unit is designed for wall mounting on a solid wall only, a gypsum
block/plasterboard wall will not suffice.
If it is not practical to use a solid wall, the unit should be fixed to a stud
partition with a 25mm minimum thickness MDF panel solidly fixed
behind the plasterboard. If fixing to a stud wall the MDF panel should
extend, width wise, over a minimum of 3 vertical studs with centres of
no more than 400mm. A vertical stud should be located to correspond
with the position each mounting bracket is to be fixed to provide
additional support. Add additional vertical supports if necessary.
Height wise, the MDF panel should extend from floor to ceiling.
Fit the two angle brackets (Figure 5) to solid mounting structure (fixings
not supplied) and secure cross brace using M5 screws.
The unit and AV mounts sub-assembly can then be placed on the wall
brackets and secured in place using the 4x M10 screws with plain and
serrated washers supplied for each of the threaded AV mounts
(Figures 6 & 7).

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28. 07. 20. Document Number 671814Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-AV4Installation Manual
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8
Wall Mounted Unit
Loft Mounted Unit
If the AV mounts are not required fit the angle brackets as detailed
above but omit the cross brace from the assembly, the MVHR unit
can be fitted directly to the wall brackets using the 8x M8 screws
pre-fitted in the base panel.
3.4 Loft Mounting
If mounting the unit in a loft space either the floor mounting method
can be utilised or a false wall may need to be created if no solid
structure is available to allow installation as per the wall mounting
method. The false wall should be a MDF panel with a minimum
thickness 25mm that is vertically fixed across the roof trusses to form a
solid structure, additional vertical supports may also be necessary
(Figure 8).
4.0 WARRANTY
The 5 year warranty starts from the day of delivery and includes parts
and labour for the first year. The remaining period covers replacement
parts only.
This warranty is void if the equipment is modified without
authorisation, is incorrectly applied, misused, disassembled, or not
installed, commissioned and maintained in accordance with the details
contained in this manual and general good practice.
The product warranty applies to the UK mainland and in accordance
with Clause 14 of our Conditions of Sale. Customers purchasing from
outside of the UK should contact Nuaire International Sales office for
further details.
Failure to maintain the unit as recommended will invalidate the
warranty.
5.0 END-OF-LIFE AND RECYCLING
Where possible Nuaire use components which can be largely recycled
when the product reaches its end-of-life:
•Fans, motors, controls, actuators, cabling and other electrical
components can be segregated into WEEE recycling streams.
•Sheet metal parts, aluminium extrusion, heating/cooling coils and
other metallic items can be segregated and fully recycled.
•EPP, plastic ducting, nylon corner pieces, plastic heat exchangers,
packaging material and other plastic components can be
segregated into mixed plastic and widely recycled.
•Cardboard packaging, wood, used filters and other paper
components can be largely recycled or fully processed in energy
from waste centres.
•Remaining Items can be further segregated and processed in
accordance with the zero waste hierarchy. Please call After Sales
Support for further information on items not listed above.
IMPORTANT
Ensure that Nuaire product is made safe from any electrical
/ water / refrigerant supplies before dismantling commences.
This work should only be undertaken by a qualified person in
accordance with local authority regulations and guidelines,
taking into account all site based risks.
6.0 AFTER SALES AND REPLACEMENT PARTS
For technical assistance or further product information, including spare
parts and replacement components, please contact the After Sales
Department.
If ordering spares please quote the serial number of the unit together
with the part number, if the part number is not known please give a full
description of the part required. The serial number will be found on the
identification plate attached to the unit casing.
Telephone [phone]
[e-mail]
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.
6 MVHR Unit, Support Tray & Wall Bracket Dimensions (mm)
746
716
Side ViewFront View
625
3
Rear hanging bracket supplied
with MVHR unit should not be used

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28. 07. 20. Document Number 671814Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-AV4Installation Manual
NOTES