NuAire MRXBOX-FF4 Instruction Manual

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22. 07. 20. Document Number 671812Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-FF4
First Fix Plenum Chamber 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-FF4 is designed for use with MRXBOXAB-ECO4
MVHR units. The product offers a first fix installation solution; in
addition the multiple spigot positions simplify ducting layouts. Each
chamber is fully lined with acoustic foam offering excellent noise
reduction.
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
MRXBOXAB-ECO4 installed 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.
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 Ducting
The metal knock outs and foam lining should be removed from any
positions that are to be ducted (Figure 1), the 220mm x 90mm spigots
supplied can then be fitted to these locations using the self-tapping
fixings supplied. If no spigot is to be fitted the knock out and foam
should be left in place and the area blanked off using the hanging
brackets and self-tapping screws supplied.
The remaining 200mm diameter spigots should be fitted to the
underside of the unit using self-tapping screws supplied.
A bead of silicone must be applied to the perimeter of all spigots
and hanging brackets fitted to prevent leakage.

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22. 07. 20. Document Number 671812Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-FF4Installation Manual
1 Ducting For Wall Mounted ECO4 MVHR Units
3.2 Final Installation
The MRXBOX-FF4 should be secured to the slab/joists/ceiling using
appropriate fixings (supplied by others), it should be aligned centrally in
both axes (Figure 2) to the corresponding MVHR unit being connected
to minimise misalignment between the ducts.
Appropriate ducting should then be used to connect the
MRXBOX-FF4 to MRXBOXAB-ECO4 or ancillary MRXBOX-SIL4 if used,
suitable clearance should be allowed around any connecting ducting
passing through the ceiling to prevent vibration being transferred to the
building structure.
2 MRXBOX-FF4 Ducting View
SECTION 1. First Fix Plenum Chamber (Code:MRXBOX-FF4)
Rectangular spigots 220 x 90mm.
4 Hanging brackets
Ducting (by others).
Rectangular spigots 220 x 90mm.
Hanging brackets fix to the underside
of the floor slab at first fix stage of
the build.
Optional Ancillary Item MRXBOX-AV4
Sold Separately (Must Be Used If Also
Fitting MRXBOX-SIL4)
SECTION 3. MRXBOXAB-ECO4 MVHR Unit
DUCTING
MRXBOX-FF4 ALIGNED CENTRALLY IN
BOTH AXES TO THE MRXBOXAB-ECO4
SLAB / JOIST / CEILING
FRONT VIEW SIDE VIEW

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22. 07. 20. Document Number 671812Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-FF4Installation Manual
3.3 Dimensions (mm)
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.
3 MRXBOX-FF4 Dimensions (mm)
712
569
146
416
= =
=
=
285
30
30
30
30
70
52
290
Bottom View
Side View
Top View
485

200
4x
8 OPENINGS TO BE FITTED WITH
EITHER A 220 x 90 SPIGOT OR
HANGING BRACKET
(ALL ITEMS SUPPLIED BY NUAIRE).

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22. 07. 20. Document Number 671812Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
MRXBOX-FF4Installation Manual
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.
6.0 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]