NuAire MRXBOX-SIL4 Instruction Manual

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22. 07. 20. Document Number 671813Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-SIL4
4 Way Silencer For Wall / Cupboard
Mounted MRXBOXAB-ECO4 Units
Installation and Maintenance
1.0 SAFETY INFORMATION
• Ducting must be securely fixed with screws to the spigot to prevent access to live parts. Duct
runs terminating close to the fan must be adequately protected by suitable guards.
• 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-SIL4 (4 Way Silencer) is designed for use with
MRXBOXAB-ECO4 MVHR units. The product offers a four way
attenuation solution to improve in duct noise levels; the bespoke
solution allows both elements to be close coupled reducing breakout
noise in this area and a more aesthetically pleasing installation.
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
MVHR 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 fan must be installed indoors, on a suitable wall away from direct
sources of frost, heat, water spray or moisture generation.
For a vibration-free result the unit must be mounted to a solid wall.
When fitting a MRXBOX-SIL4 in conjunction with a
MRXBOXAB-ECO4 the unit should be mounted using the
alternative wall mounting method supplied under product code
MRXBOX-AV4 (Figure 4). Under no circumstances should this
assembly be fitted using the standard hanging bracket supplied
with the MVHR unit as this is not rated for the combined load.
For more detailed information on structural and installation
requirements of the MRXBOXAB-ECO4 unit please refer to the
installation documents supplied with the MVHR unit and also
MRXBOX-AV4 for wall mounting details.
3.1 Pre-assembly
The silencer is supplied with 4x 200mm O-rings, these should be fitted
over the 200mm foam spigots on the top of the MVHR unit.
Secure the toggle clamp and catch plate to both sides of the MVHR
unit and silencer with the M4 fixings supplied (Figure 1).
If any Ecosmart products are to be used the connection to the MVHR
unit should be made at this point as this is situated on the rear panel
and access will be restricted once in place.

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22. 07. 20. Document Number 671813Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-SIL4Installation Manual
3.2 Wall Mounting
Fit the wall mounting brackets and secure the MVHR unit using the
anti-vibration mounts as detailed in the installation document supplied
as part of MRXBOX-AV4.
MRXBOX-SIL4 can be placed on top of the MVHR unit with the spigots
located inside the chambers of the SIL and secured in place using the
toggle clamps, the safety pins supplied should be fitted to fasten the
clamps in place in the locked position (Figure 1).
If space constraints prohibit the silencer being moved into position as
a secondary operation it may be hung in advance using the additional
wall bracket supplied with the MVHR, it can then be lifted off and
lowered into position. Care should be taken to fix the bracket at a
suitable height to ensure the two halves are not in contact when the
final assembly is complete.
Note: the above method is the preferred installation arrangement,
a minimum gap of 75mm either side of the unit is advised to allow
access to the toggle clamps.
If space constraints do not allow this, the toggle clamps can be replaced
with the metal fixing plates provided (Figure 2). The
MRXBOXAB-ECO4 + MRXBOX-SIL4 will need to be secured together
and lifted as one assembly using suitable lifting equipment.
3.3 Dimensions (mm)
3 MRXBOX-SIL4 Dimensions (mm)
1
2
Toggle Clamp
Fixing Plate
705
635 27
540
Front View Side View
200

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22. 07. 20. Document Number 671813Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-SIL4Installation Manual
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]
4 Installed view of MRXBOXAB-ECO4 using anti-vibration mounts
(MRXBOX-AV4) and four way silencer (MRXBOX-SIL4)
40
625
746 636
MRXBOXAB-ECO4
MRXBOX-SIL4
Rear hanging brackets supplied
with MVHR unit and SIL should
not be used when using MRXBOX-AV4
2 7
MRXBOX-AV4
Ø200
Side View
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.

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22. 07. 20. Document Number 671813Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-SIL4Installation Manual
NOTES