NuAire MRXBOXAB-ECO3-AESW User manual

1
08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW
MRXBOXAB-ECO5-AECV/SC/SW
Mechanical Ventilation Units with
Heat Recovery for Wall Mounting
Installation Manual
1.0 SAFETY INFORMATION
• The provision of the electrical supply and the connection of the unit to the mains must be
carried out by a qualified electrician.
• Isolate from power supply before removing any covers. During installation / maintenance
ensure all covers are fitted before switching on the mains supply.
• All-pole disconnection from the mains as shown in the wiring diagram must be
incorporated within the fixed wiring and shall have a minimum contact separation of 3mm
in accordance with latest edition of the wiring regulations.
• This unit must be earthed.
• 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.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent
or similarly qualified persons in order to avoid a hazard.
• Precautions must be taken to avoid the back-flow of gases into the room from the open
flue of gas or other fuel-burning appliances.
• 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 Hazard 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.

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08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW & MRXBOXAB-ECO5-AECV/SC/SWInstallation Manual
2.0 INTRODUCTION
The ECO(3/5)-AE wall mounted range of units are designed
to oer improved sound levels and an aesthetically pleasing
installation by housing a Mechanical Ventilation with Heat
Recovery unit (MVHR) and attenuator inside an acoustically lined
enclosure.
The MVHR unit is fitted with two independent fans. Each fan has
full speed control for background and boost ventilation rates.
To recover heat from the extract air the heat exchanger block
is utilised. The heat exchanger can recover up to 95% of the
normally wasted heat.
Bypass operation can be disabled via a manual switch in colder
months so the unit recovers heat continually.
2.1 Code Description
1 2 - 3 4 5
MRXBOXAB-ECO 3 - AE OH SW
1. Range: MRXBOXAB-ECO
2. Unit Size: 3 = Size 3 Unit
5= Size 5 Unit
3. Enclosure Type: AE = Acoustic Enclosure
4. Unit Handing [none] = Standard Handing
OH = Opposite Handing
5. Speed Control Variant: CV = For use with vertical cooling
module. (ECO5 unit only)
SC = For use with inline cooling
module. (ECO5 unit only)
SW = For use when no additional
cooling module is connected.
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. All mains wiring must be in
accordance with the current I.E.E. Regulations, or the appropriate
standards. Ensure that the mains supply (Voltage, Frequency and
Phase) complies with the rating label.
Please allow a minimum of 360m in front of an
MRXBOXAB-ECO(3/5)-AE unit.
The fan must be installed indoors, on a suitable wall away
from direct sources of frost, heat and water spray or moisture
generation. For a vibration-free result the unit must be mounted to
a solid wall.
The unit must remain switched on at all times to maintain
ventilation within the dwelling. Turning the unit o will cause
long term damage to the unit and building fabric.
1 Airflow Through unit (Standard Unit)
Intake air
from outside
Extract air
from house
to house
Supply air
Exhaust air
from house
to outside
Extract air
from house
Intake air
Exhaust air from outside
from house
to outside Supply air
to house
2 Airflow Through OH unit (Opposite Hand Unit)
Intake air
from outside
Extract air
from house
to house
Supply air
Exhaust air
from house
to outside
Extract air
from house
Intake air
Exhaust air from outside
from house
to outside Supply air
to house
3.1 Transport Fixings
To prevent damage during transportation the product is shipped
with securing fixings, these can be found front and centre of the
enclosure top panel (Figure 3). These must be removed before
use, failure to do so will result in excessive vibration and noise.
The screws removed can be discarded and replaced with rubber
caps provided.
3 Transport Fixings Spigot fixing plate
Transportation fixings
3.2 Wall Mounting
The unit is designed for wall mounting on a solid wall only, a
gypsum block/plasterboard wall will not suce.
Examples of suitable installation are shown overleaf. The wall
brackets supplied should be secured to the wall using suitable
fixings (supplied by others) as per the dimensions given in figure
4. The head of the chosen fixing should protrude no more than
8mm from the wall bracket. The enclosure assembly can then
be lifted using suitable equipment and moved into position so it
is sitting directly on the wall brackets (ensuring the rear panel of
the enclosure is not in contact with the wall bracket fixings). The
enclosure can be secured to the wall brackets using the 4x M8
fixings supplied.
No part of enclosure should be in contact with the building
structure, the only components that should be in contact are the
wall mounting brackets.
Care must be taken to ensure the unit is installed true in all 3
dimensions. Failure to do so may result in overflow from the
internal condensation drip tray.
4 Wall Bracket Installation Dimensions
2525 704 crs
9.1 dia.
30
94
94
33

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08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW & MRXBOXAB-ECO5-AECV/SC/SWInstallation Manual
3.3 Mounting Brackets (CV Units Only)
3.3.1 Mounting brackets are not supplied with
MRXBOXAB-ECO5-AE(OH)CV units. The recommended mounting
method uses the ECO5-AE-1Z-STND. Alternatively angled brack-
ets are purchased separately (Part Number: 7713882). Refer to
MR-ECO-COOL-V installation manual (Document number 672010).
3.3.2 Option 1 - Solid Wall
The MVHR unit fixed to a solid wall construction using the
mounting bracket provided.
5 Solid Wall Mounted Unit Installation
Ducting in the
ceiling void.
Side view of unit
mounted on the
block wall in a
cupboard using
MVHR-DRAIN
the wall brackets.
Condensate drain,
uninsulated drain
pipe with min 5ofall
running to SVP.
Valve in ceiling.
Unit weight
= 56kG
3.3.3 Option 2 - Non-Solid Wall
If it is not practical to use a solid wall, the MVHR 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. Add additional vertical supports if necessary.
Height wise, ideally, the MDF panel should extend from floor to
ceiling but as a minimum should be a least 2m high.
Fix the mounting bracket to the wall (Figure 3) and use the wall
mounted bracket to mount the unit on (Figure 5).
6 Non-Solid Wall Mounted Unit Installation
Ducting in the
ceiling void.
Side view of unit
mounted in a
with the 25mm
cupboard fixed to
a stud partition
MDF fixed behind
the plasterboard
using the wall
MVHR-DRAIN
brackets.
Condensate drain,
uninsulated drain
pipe with min 5ofall
running to SVP.
Valve in ceiling.
Unit weight
= 56kG
3.4 Condensate Drain
The MVHR unit inside the enclosure is fitted with a straight
coupling to allow 21.5mm overflow pipe (not supplied) to be
attached using solvent cement, the pipe should be passed
through the flexible adhesive backed cover plate before the
solvent cement is applied.
The pipe can then be inserted into the coupling of the MVHR unit
and the cover plate slid along the length to bond against the base
panel of the enclosure preventing noise breakout (Figure 7).
7 Condensate Pipe Installation
Solvent cement to be applied
Flexible adhesive backed
cover plate
Overflow pipe
The condensate must be discharged under a water level in a
U-trap drainpipe or an alternative drain method which acts as
an airlock. This condensate discharge connection is suitable for
21.5mm Ø overflow pipe. Solvent cement should be used to make
the joint.
If using a U-trap please ensure the U-trap has been filled to a
suitable level of water to avoid any air locks. If the condensation
pipe is fitted in an unheated space the pipe should be in insulated
to prevent freezing.
An MVHR-DRAIN is recommended for use as the primary
condensate take-o (Figures 8 and 9).
Min 5o Drop
8 Condensate Trap Installation
Condensate pipe connection
to unit and a typical example of
a “U” trap drainpipe (Standard
configuration only).
Collar
9 MVHR-DRAIN Installation
Condensate drain,
uninsulated drain pipe with
min 5° fall running to SVP.

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08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW & MRXBOXAB-ECO5-AECV/SC/SWInstallation Manual
To SVP
“T” piece
MVHR Drain
To unit
To CONTRAP
10 "T" Piece CONTRAP & MVHR Drain
Connection
When using a “T” Piece to connect the CONTRAP drainage
and the MVHR drain pipework the MVHR drain must always
be fitted before the “T” Piece to prevent condensate from
feeding back into the MVHR system.
3.5 Extract / Input Areas
The unit is designed to extract air from all wet rooms e.g.
bathroom, kitchen, en-suite, utility room (with sink). WC’s do not
need to be ventilated if openable windows are fitted.
Supply air should be to all habitable rooms e.g. bedrooms and
lounge. Extract / input grilles should be adjustable valve types
(not supplied). External grilles are to have a minimum free area of
12,250 sq. mm.
3.6 Ducting
Before commencing ducting installation reference should be
made to building regulations document “Domestic ventilation
compliance guide”. This document supports ADF2010 and details
installation, testing and commissioning of all ventilation systems.
It is recommended that rigid ducting be used at all times. Flexible
ducting has a very high resistance and it is impossible to calculate
how much resistance will be on a system if used.
If used the flexible ducting must be kept to a minimum and should
always be pulled taut. A maximum of 300mm should be used on
each leg.
To prevent condensation on the outside of the outside air inlet
duct and the air outlet duct from the unit, these ducts should be
insulated.
Ducting must be installed in such a way that resistance to airflow
is minimised. Bends should be kept to a minimum.
A minimum distance of 300mm between the appliance and any
bends in ductwork is recommended.
Ideally 150mm diameter or 204 x 60mm rectangular ducting
should be used (Figures 12 & 13).
Ducting joints must be sealed with silicone type sealant and shall
be adequately and reliably fixed to the appliance.
3.7 Ventilation Flow Rates
ADF 2010 - Extract Ventilation Rates
Room Minimum High
rate
Minimum Low
Rate
Kitchen 13 l/s Total extract rate
should be at least
the whole dwelling
ventilation rate
given in table 2.
Utility Room 8 l/s
Bathroom 8 l/s
Sanitary
Accommodation
6 l/s
Whole Dwelling Ventilation Rates
Number Of Bedrooms In Dwelling
1 2 3 4 5
Whole dwelling
ventilation rate
(l/s)1,2
13 17 21 25 29
Notes:
1. In addition, the minimum ventilation rate should be no less than
0.3 l/s per m² of internal floor area. (This includes all floors, e.g.
for a two-story building add the ground and first floor areas).
2. This is based on two occupants in the main bedroom and a
single occupant in all other bedrooms. This should be used as the
default value. If a greater level of occupancy is expected add 4 l/s
per occupant.
Any air intake terminal must be installed in accordance with
the appropriate regulation. As a guide, the BS5440 series of
British Standards deals with this issue and currently states that
an air intake must be at a minimum distance of 300mm from a
gas boiler balanced flue. Installers are advised to be aware of
the requirements of this standard when installing ‘through the
wall’ supply air ducting.
3.8 ADF 2010 Ventilation Calculations Design of MVHR
Systems
The MVHR system has been sized for the winter period.
Additional ventilation may be required during the warmer months
and it has been assumed that the provisions for purge ventilation
(e.g. openable windows) could be used.
Step 1: For any design air permeability, determine the whole
dwelling ventilation supply rate from Whole Dwelling Ventilation
Rates table.
As an alternative where the design air permeability is intended
to be more than (>) 5m3/(h.m2) 50 Pa, allow for infiltration for all
dwelling types by subtracting from the whole dwelling ventilation
supply rate from Whole Dwelling Ventilation Rates table; 0.04 x
gross internal volume of the dwelling heated space (m3).
Step 2: Calculate the whole dwelling extract ventilation rate by
summing the individual room rates for ‘minimum high rate’ from
ADF 2010 - Extract Ventilation Rates table.
(For sanitary accommodation only, as an alternative, the purge
ventilation provisions given in ADF 2010 can be used where
security is not an issue. In this case ‘minimum high extract rate’ for
the sanitary accommodation should be omitted from the step 2
calculation).
Step 3: The required airflow rates are as follows:
The maximum whole dwelling extract ventilation rate (e.g. boost) should be at
least the greater of step 1 and step 2. Note that the maximum individual room
extract rate should be at least those given in ADF 2010 - Extract Ventilation
Rates table.
The minimum air supply rate should be at least the whole building ventilation
rate found in step 1.
For Scotland refer to BRE Digest 398.
For further information refer to “Domestic Ventilation
Compliance Guide” www.planningportal.gov.uk/
buildingregulations/approved documents/partl/compliance.

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08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW & MRXBOXAB-ECO5-AECV/SC/SWInstallation Manual
3.8.1 Pre Commissioning MRXBOX MVHR Units
MRXBOX units are designed to ventilate the whole dwelling
and must not be used during site construction or the clean-up
period. Cement and plaster dust can be abrasive and can aect
fan performance and reliability. Please ensure that the filters are
checked prior to commissioning to ensure there is no build-up of
dust or debris.
While the property is drying out, very high moisture levels are
likely to occur. Therefore it is advisable that if the installation and
building works are complete the unit is left running. If the building
works are not complete please close the air valves or cover up
the air valves to prevent condensation forming in the ductwork
and the MRXBOX unit due to natural migration of warm air.
3.9 Dimensions
11 Unit Dimensions
754
527
525
55
227 CR S155 458 CRS
= =
Ø150.0
UNIT WEIGHT = 56Kg
If ancillary distribution box (MRXBOX-DB3 / MRXBOX-DB5) is to be used refer to documentation
supplied with MRXBOX-DB3 / MRXBOX-DB5 for additional infomation as requirements will differ.
107107
N
N
)
Condensate drain
connection
(opposite hand
configuration)
Condensate drain connection
on centre line of unit
Condensate drain connection
(standard configuration)

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08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW & MRXBOXAB-ECO5-AECV/SC/SWInstallation Manual
3.10 Ducting Arrangements - Standard Unit Configuration
3.10.1 Circular Ducting
12 Typical Circular Ducting Arrangement For Wall Mounted Units
Air supply
to lounge
in ceilings.
via Air Valve
Extract air
from
kitchen/
bathroom
in ceilings.
via Air Valve
Exhaust air from
kitchen/bathroom to
outside via louvre grille.
Minimum distance as specified
in building regulations.
Intake air
from outside
via louvre grille.
All duct between MVHR
unit and atmosphere to
be insulated*.
*Insulated
supply duct.
Top of ceiling void.
Air supply to
bedrooms
in ceilings.
via Air Valve
mounted unit.
Nuaire wall
MVHR-DRAIN
Condensate drain, uninsulated
drain pipe with min 5ofall running to SVP.
*Insulated
extract duct.
3.10.2 Rectangular Ducting
13 Typical Rectangular Ducting Arrangement For Wall Mounted Units
Exhaust air from
kitchen/bathroom to
outside via air brick.
Minimum distance as specified
in building regulations.
Intake air
from outside
via air brick.
All duct between MVHR
unit and atmosphere to
be insulated*. *Insulated
supply duct.
Air supply
to lounge
in ceilings.
Extract
via Air Valve air from
kitchen/
bathroom
in ceilings.
via Air Valve
Air supply
to bedrooms
in ceilings.
via Air Valve
Top of ceiling void.
mounted unit.
Nuaire wall
MVHR-DRAIN
Condensate drain, uninsulated
drain pipe with min 5ofall running to SVP.
*Insulated
extract duct.
Also from Nuaire:
thermal ducting,
An all-in-one insulated ducting system.
(See installation document 671780)

7
08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW & MRXBOXAB-ECO5-AECV/SC/SWInstallation Manual
4.0 ELECTRICAL INSTALLATION
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.
The electrical connection of the unit must be carried out by a
qualified electrician. The unit is supplied with a flexible cord for
connection to the mains supply.
4.1 Electrical Information
Unit Consumption
ECO3 1.2 Amp
ECO5 2 Amp
Voltage: 240V 1ph 50Hz
This unit must be earthed.
The cable from the mains power supply should be connected to
a fixed wiring installation, via a fused isolator, in accordance with
current IEE wiring regulations.
4.2 Wiring Diagrams
4.2.1 Unit Serving Kitchen And Bathroom
15 Wiring Diagrams - Unit Serving Kitchen And Bathroom
ECO3: 3A Fuse (BS 1362)
ECO5: 5A Fuse (BS 1362)
MAINS
230V
50Hz
Light
Room
Light
Switch
(Double
Pole)
N
L
3 Pole
Isolator
Kitchen Switch
Blue
Brown
Black
Optional 3 Speed Switch
Supply Cord
From Unit
Grey
Green / Yellow
4.2.2 Unit Serving Kitchen And Two Bathrooms
16 Wiring Diagram - Unit Serving Kitchen And Two Bathrooms
MAINS
230V
50Hz
Room
Lights
Light
Switches
(Double
Pole)
N
L
3 Pole
Isolator
Kitchen Switch
Blue
Green / Yellow
Brown
Black
Supply Cord
From Unit
Optional 3 Speed Switch
Grey
ECO3: 3A Fuse (BS 1362)
ECO5: 5A Fuse (BS 1362)
4.2.3 Summer / Winter Switch
17 Wiring Diagram - Summer / Winter Switch
Black
2 core cable from
ventilation unit
Red
Volt free Summer / Winter Switch
(supplied with ventilation unit)
Polarity is inconsequential
Warning! - Do not connect to mains!
EXTRA
EXTRA
CT F
CT F
AN
Supply Extract Supply Extract Supply Extract
SPEED 1 SPEED 2 SPEED 3
Wiring is for
reference purposes
only, connections
shown are factory
fitted.
This unit is pre-
wired with a 2
metre fly lead on
SW and SC units,
on CV units the fly
lead is 5m.
14 PCB Details
Cable is approximately 1.5m
long on SW and SC units,
on CV units the cable is 6.5m.

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08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW & MRXBOXAB-ECO5-AECV/SC/SWInstallation Manual
5.0 COMMISSIONING
The filters fitted inside the unit are protected with a plastic
film. Prior to commissioning remove the covers (Figure 20),
take o the film and replace.
1. For the required air flow rates please refer to the design
specification for the property, follow 2.4, or refer to building
regulations ADF 2010.
2. The unit is supplied with independent control for both normal
and boost airflows (Figure 18).
3. Correct commissioning is essential to ensure the ventilation
air flow rates are met. It also ensures the unit is not over
ventilating and causing excessive power consumption.
4. Commissioning should be carried out in accordance with
building regulations document “Domestic ventilation
compliance guide”.
www.planningportal.gov.uk/building regulations/approved
documents/partf/associated. A calibrated moving vane
anemometer and hood will be required to carry out
commissioning.
5. Adjustment valves should be locked in place to prevent
further adjustment.
6. Once commissioned the home owner / tenant should be
informed that the unit should not be adjusted as it will have a
detrimental eect on the indoor air quality and could result in
condensation and mould growth. The clear panel covering the
control has an adhesive panel which should be exposed and
sealed post commissioning to prevent tampering.
7. Speed 1 is limited to never exceed speed 2, when
commissioning speed 2 should always be set first.
18 Unit Control On Front Panel (Standard Configuration Only)
+ -
Post commissioning remove
adhesive backing and seal
Power Fan
Failure
+ -
Ventilation Controls
-
+
+
-
+
-
Speed 1
-
+
Speed 2 Speed 3
Supply Extract Supply Extract Supply Extract
Humidity adjustment
5.1 Humidity Adjustment
This product contains an internal humidity sensor fitted into the
air-flow extracting from the wet rooms. When the unit senses that
the humidity exceeds the set point the unit will boost to that set
by the commissioned boost speed. The set point can be found
on the front of the unit (Figure 18) and is at its least sensitive when
turned fully clockwise. Note that the sensor is measuring humidity
from all the wet rooms at the same time and should not be relied
on to solely boost the unit. Additional switch should be used local
to the wet rooms (Section 4.2).
5.2 Status Indication
The status of the unit is indicated by a series of LED’s on the front
cover. The variants are listed below.
The display on the unit control panel will not indicate when a
higher speed setting has been triggered by an external source,
such as an ES-PIR2 etc.
19 Unit Control On Front Panel (Standard Configuration Only)
HX Bypass
(AB units only)
Speed 1
Speed 2
Speed 3
Supply Fan Fault
Extract Fan Fault
Frost Protection
Filter Change
5.3 Integral Automatic HX Bypass
Intake and extract temperatures are monitored at the point the
airflows enter the unit, if the range falls within the set parameters
the bypass damper is opened automatically to target an indoor
comfort temperature all year round.
The extract temperature is an average from all wet rooms. The
unit targets a temperature below 20°C and may go into bypass
depending on outside temperatures.
5.4 Summer / Winter Switch
When the switch position is set to Summer the integral automatic
summer bypass is fully operational, in the alternative Winter
position the HX bypass is disabled to ensure the unit is constantly
in heat recovery mode.
5.5 Speed 3 Operation (SW Units Only)
Speed 3 will be non-operational if the intake temperature is
greater than the extract temperature.
5.6 Frost Protection
In the event of the intake air temperature at the unit dropping
below the predetermined set point (-5°C as standard) the supply
fan will reduce to minimum speed, once the temperature rises
above the set point the fan will return to its commissioned speed.
Frost protection will only activate after ten days of continuous
run time. If commissioning of the unit is outside of this time frame
please notify the after sales department prior to site visit.
5.7 Ecosmart Cable (CV Units Only)
CV units are fitted with a four core low voltage cable on under
side (approximately 4.5m). This cable is for use with MR-ECO-
COOL-V Cooling Module controls only (7713807).

9
08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW & MRXBOXAB-ECO5-AECV/SC/SWInstallation Manual
8.0 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, and other paper components
can be largely recycled or fully processed in energy from
waste centres.
•Filter Disposal: Cardboard framed filters should be fully
processed in energy from waste centres, contact your
local civic amenity site / household waste recycling centre
regarding metal / wire framed filters.
•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.
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.
9.0 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]
[email protected]
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 MAINTENANCE
It is important that maintenance checks are recorded and that the
schedule is always adhered to, in all cases, the previous report
should be referred to.
6.1 Filters
Filters are to be inspected every 6 months and replaced every
12 months (or sooner if required). Failure to do so may impair
the performance and energy eciency of this unit. A flashing
LED (Section 5.2) will indicate that a filter change is required. This
indication repeats every 12 months and will turn o automatically
after 5 Days.
Remove the filter covers on the front panel of the unit by gripping
the two circular tabs either end of the filter covers and pulling
away from the unit. The filter can now be extracted by pulling the
black removal loop on the front edge of the filter. Once the filters
have been inspected return or replace them as necessary.
20 Removing Filter Covers
Outer enclosure cover
MVHR unit cover
Filter
Heat Exchanger
Filter cover
7.0 WARRANTY
The 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 oce for further details.
Only genuine Nuaire parts and filters may be used to maintain
the unit. Failure to maintain the unit as recommended will
invalidate the warranty.

10
08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW & MRXBOXAB-ECO5-AECV/SC/SWInstallation Manual
NOTES

11
08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW & MRXBOXAB-ECO5-AECV/SC/SWInstallation Manual
NOTES

12
08. 09. 23. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AESW & MRXBOXAB-ECO5-AECV/SC/SWInstallation Manual
NOTES