NuAire MRXBOXAB-ECO2B-1Z Installation Manual

MRXBOXAB-ECO2B-1Z (Standard Unit)
MRXBOXAB-ECO2B-1Z-H (Opposite hand Unit)
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 electrical supply
must be carried out by a qualified electrician in accordance with latest edition of the wiring
regulations.
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. The replacement cord must be of the same
technical specification as the original cord or greater.
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
1.3 Personal Protective Equipment
This manual contains important information on the safe and
appropriate assembly, transport, commissioning, operation,
maintenance, disassembly and simple troubleshooting of the product.
The following minimum Personal Protective Equipment (PPE) is
recommended when interacting with Nuaire 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.
•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.
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
27. 10. 21. Document Number 671986
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MRXBOXAB-ECO2B-1Z
Installation Manual
2.0 INTRODUCTION
3.0 MECHANICAL INSTALLATION
housing a Mechanical Ventilation with Heat Recovery unit (MVHR)
and attenuator inside an acoustically lined enclosure. Extract air
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.
Intake air
from outside
Exhaust air
The
ECO2-1Z
wall
mounted
range
of
units
are
designed
to offer
from house
Supply air
improved
to outside sound levels and an aesthetically pleasing installation by
to house
from house
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.
If the MVHR unit has integral automatic HX bypass (AB models
only), the bypass damper shall open automatically via a wax actuator
allowing the air to bypass the heat exchanger to deliver fresh filtered air
during the warmer months.
1 Airflow Through Unit (Opposite Hand Unit)
Supply air
to house
Extract air
from house
Exhaust air
from house
to outside
Intake air
from outside
Please allow a minimum of 350mm in front of the enclosure.
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 nonreverberant wall.
3.1 Transportation 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 Transportation Fixings
Spigot fixing plate
Transportation fixings
2 Airflow Through Unit (Standard Hand Unit)
Exhaust air
from house
to outside
3.2 Wall Mounting
Intake air
from outside
Supply air
to house
Extract air
from house
The unit is designed for wall mounting on a solid wall only, a gypsum
block/plasterboard wall will not suffice. 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.
The unit must remain switched on at all times to maintain
ventilation within the dwelling. Turning the unit off will cause long
Extract air
term damage to the unit and building fabric.
Supply air
from house
This
appliance is not intended for use by persons (including
to house
Exhaust air
children) with reduced physical, sensory or mental capabilities,
from house
outside
or lack of experience and knowledge, unless they have to
been
given
supervision or instruction concerning the use of the appliance
Intake air by a
from
outside
person for their safety. Children should be supervised so
that
they
do not play with the appliance.
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 Dimensions
25
25
656 crs
ia.
d
9.1
30
94
94
33
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
27. 10. 21. Document Number 671986
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MRXBOXAB-ECO2B-1Z
Installation Manual
3.2.1 Solid Wall Mounting (Recommended)
3.3 Condensate Drain
The MVHR unit fixed to a solid wall construction using the
mounting bracket provided.
5 Cupboard Mounted Unit Fixed to Block Work Wall Example
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).
Ducting in the
ceiling void.
Side view of unit
mounted on the
block wall in a
cupboard using
the wall brackets.
Valve in ceiling.
1. The condensate must be discharged under a water level in a U-trap
drainpipe or an alternative drain method which acts as an airlock.
2. This condensate discharge connection is suitable for 21.5mm Ø
overflow pipe. Solvent cement should be used to make the joint.
3. If using a U-trap please ensure the U-trap has been filled to a
suitable level of water to avoid any air locks.
Unit weight
= 58kG
4. If the condensation pipe is fitted in an unheated space the pipe
should be in insulated to prevent freezing.
MVHR-DRAIN
Condensate drain,
uninsulated drain
pipe with min 5o fall
running to SVP.
Nuaire recommend MVHR-DRAIN be used as the primary
condensate take-off (Figures 9 and 10).
7 Wall Bracket Dimensions
Solvent cement to be applied
3.2.2 Stud Partition Wall Mounting (Alternative)
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.
Flexible adhesive backed
cover plate
Overflow pipe
8 Condensate Drain - Wet Connection: Unit Pipe Connection To
Typical “U” Trap Drainpipe Example
Fix the mounting bracket to the wall (Figure 4) and use the wall
mounted bracket to mount the unit on (as shown in Figure 6).
6 Cupboard Mounted Unit Fixed to Stud Partition Wall Reinforced
With MDF Panel Example
Min 5 o Drop
Ducting in the
ceiling void.
Side view of unit
mounted in a
cupboard fixed to
a stud partition
with the 25mm
MDF fixed behind
the plasterboard
using the wall
brackets.
Valve in ceiling.
Unit weight
= 58kG
MVHR-DRAIN
Condensate drain,
uninsulated drain
pipe with min 5o fall
running to SVP.
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
9 Condensate Drain - MVHR-DRAIN: Condensate Drain,
Uninsulated Drain Pipe With Min 5° Fall Running To SVP.
Collar
27. 10. 21. Document Number 671986
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MRXBOXAB-ECO2B-1Z
Installation Manual
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.
3.6 Ventilation Flow Rates
3.6.1 ADF 2010 - Extract Ventilation Rates
10 Condensate Drain "T" Piece Installation
MVHR Drain
To CONTRAP
To unit
To SVP
“T” piece
Room
Min high rate
Kitchen
13 l/s
Utility Room
8 l/s
Bathroom
8 l/s
Sanitary
Accommodation
6 l/s
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 mm2.
Total extract rate
should be at least
the whole dwelling
ventilation rate given
in table 2.
3.6.2 Whole Dwelling Ventilation Rates
Number of bedrooms in dwelling
3.4 Extract & Supply 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.
Min low rate
Whole dwelling
ventilation rate
(l/s)
1
2
3
4
5
13
17
21
25
29
1,2
3.5 Ducting
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).
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.
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.
If the enclosure is to be used in conjunction with an ancillary
distribution box (MRXBOX-DB2) refer to additional assembly
instructions supplied with the MRXBOX-DB2 as requirements will
differ.
3.7 ADF 2010 Ventilation Calculations Design Of MVHR
Systems
Otherwise fit 4x 125mm diameter plastic spigots with the self-tapping
screws supplied to the spigot fixings plates found on the top panel of
the enclosure, a bead of silicone should be applied to the groove of
spigot fixing plate to prevent leakage (Figure 3).
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 125mm diameter or 220 x 90mm rectangular ducting should
be used (Refer to dwelling design drawing, Figures 12 & 13 for further
information).
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 Table 2.
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 Table 2; 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 Table
1.
(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:
Ducting joints must be sealed with silicone type sealant and shall be
adequately and reliably fixed to the appliance.
•The maximum whole dwelling extract ventilation rate (e.g. boost)
should be at least the greater of step 1 and step 2. The maximum
individual room extract rate should be at least those given in table
1.
Any air intake terminal MUST be installed in accordance with the
appropriate regulation.
•The minimum air supply rate should be at least the whole building
ventilation rate found in step 1.
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.
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
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
27. 10. 21. Document Number 671986
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MRXBOXAB-ECO2B-1Z
Installation Manual
3.8 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 affect 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 MRXBOX95
unit due to natural migration of warm air.
3.9 Dimensions
11 Dimensions
UNI T WEI GHT = 58Kg
if ancillary distribution box MRXBOX-DB2 is to be used refer to documentation
supplied with MRXBOX-DB2 for additional infomation as requirements will differ.
417 CRS
172 CRS
=
=
144
1053
55
Ø125.0
Condensate drain
connection
(standard
configuration)
142
Condensate drain
connection
on centre line
of unit
142
706
448
Condensate
ondensate
dr
drain
ain connection
CONDENSATE
DRAIN
CONNECTION
(opposite
configuration)
opposite
conf
igur
ation)
(OPPOSIThand
E HAND
CON
FIGU
RATION)
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
27. 10. 21. Document Number 671986
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MRXBOXAB-ECO2B-1Z
Installation Manual
3.10 Ducting Arrangements - Standard Configuration Unit
3.10.1 Circular Ducting
12 Typical Ducted Arrangement For A Wall Mounted Unit Using Circular Ducting
Exhaust air from
kitchen/bathroom to
outside via louvre grille.
*Insulated
extract duct.
Exhaust
airdistance
from as specified
Minimum
kitchen/bathroom
to
in building regulations.
outside via louvre grille.
Top of ceiling void.
Minimum distance as specified
in building regulations.
Top of ceiling void.
*Insulated
extract duct.
Air supply
to lounge
via Air Valve
in ceilings.
Intake air
from outside
via louvre grille.
All
ductairbetween MVHR
Intake
unit
atmosphere to
fromand
outside
be
via insulated*.
louvre grille.
*Insulated
supply duct.
All duct between MVHR
unit and atmosphere to
be insulated*.
*Insulated
supply duct.
Air supply
to lounge
via Air Valve
in ceilings.
Extract air
from
kitchen/
bathroom
via
Air Valve
Extract
air
in
ceilings.
from
Air supply to
bedrooms
via Air Valve
in ceilings.
Air supply to
bedrooms
via Air Valve
in ceilings.
kitchen/
bathroom
via Air Valve
in ceilings.
Nuaire
MVHR unit.
MVHR-DRAIN
Condensate drain, uninsulated
drain pipe with min 5 o fall running to SVP.
Nuaire
MVHR unit.
MVHR-DRAIN
Condensate drain, uninsulated
drain pipe with min 5 o fall running to SVP.
3.10.2 Rectangular Ducting
*Insulated Ducting
Ducted Arrangement For A Wall Mounted Unit Using Circular
13 Typical
extract duct.
Exhaust air from
kitchen/bathroom to
outside via air brick.
Exhaust
airdistance
from as specified
Minimum
kitchen/bathroom
to
in building regulations.
outside via air brick.
Minimum distance as specified
in building regulations.
Intake air
from outside
via air brick.
All
ductairbetween MVHR
Intake
unit
atmosphere to
fromand
outside
be
via insulated*.
air brick.
All duct between MVHR
unit and atmosphere to
be insulated*.
*Insulated
extract duct.
Top of ceiling void.
Top of ceiling void.
Air supply
to lounge
via Air Valve
in ceilings.
Air supply
to lounge
via Air Valve
in ceilings.
*Insulated
supply duct.
Air supply
to bedrooms
via Air Valve
in ceilings.
Extract
air from Air supply
kitchen/ to bedrooms
bathroom via Air Valve
via
Air Valvein ceilings.
Extract
in
airceilings.
from
kitchen/
bathroom
via Air Valve
in ceilings.
*Insulated
supply duct.
Nuaire
MVHR unit.
MVHR-DRAIN
Condensate drain, uninsulated
drain pipe with min 5 o fall running to SVP.
Nuaire
MVHR unit.
MVHR-DRAIN
Condensate drain, uninsulated
drain pipe with min 5 o fall running to SVP.
ALSO FROM NUAIRE New
range of thermal ducting,
an all-in-one insulated ducting system
(see installation document 671780)
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
27. 10. 21. Document Number 671986
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MRXBOXAB-ECO2B-1Z
Installation Manual
4.0 ELECTRICAL INSTALLATION
14 PCB Details
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
Electrical details:
Voltage: 240V 1ph 50Hz
Consumption: 1.2 Amp
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.
Supply Supply Extract Extract
Speed1 Speed2 Speed1 Speed2
Wiring is for reference purposes only as the connections in Figure
14 are factory fitted. The unit is pre-wired with a 2 metre fly lead.
4.2 Wiring Diagrams
4.2.1 Unit Serving Kitchen & Bathroom
Disconnection from the
supply mains must be
incorporated within the
fixed wiring in accordance
with the wiring
regulations and shall
have a minimum contact
separation of 3mm.
15 Wiring Diagram - Kitchen & Bathroom
MAINS
230V
50Hz
Green / Yellow
Blue
N
L
Supply Cord
From Unit
Brown
3A Fuse
(BS 1362)
Room
Light
Light
Switch
(Double
Pole)
Black
3 Pole
Isolator
Grey
Optional 3 Speed Switch
Kitchen Switch
4.2.2 Unit Serving Kitchen & 2 Bathrooms
Disconnection from the
supply mains must be
incorporated within the
fixed wiring in accordance
with the wiring
regulations and shall
have a minimum contact
separation of 3mm.
16 Wiring Diagram - Kitchen & Bathroom
Green / Yellow
MAINS
230V
50Hz
Blue
N
L
Supply Cord
From Unit
Brown
3A Fuse
(BS 1362)
Room
Lights
Black
3 Pole
Isolator
Light
Switches
(Double
Pole)
Grey
Optional 3 Speed Switch
Kitchen Switch
Optional Controls - For further information regarding optional controls, contact Nuaire on 02920 858 400.
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
27. 10. 21. Document Number 671986
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MRXBOXAB-ECO2B-1Z
Installation Manual
5.0 COMMISSIONING
6.0 CONTROLS
The filters fitted inside the unit are protected with a plastic film.
Prior to commissioning remove the covers (Figure 19, take off the
film and replace.
6.1 Speed 3
•For the required air flow rates please refer to the design
specification for the property, follow Scetion 3.7, or refer to
building regulations ADF 2010.
The unit has the ability to override both speed 1 and speed 2 to operate
the fan to maximum airflow. See wiring diagram for details of operating
this facility.
6.2 Status Indication
•The unit is supplied with independent control for both normal and
boost airflows (Figure 17).
The status of the unit is indicated by a series of LED’s on the front cover.
The variants are listed below.
•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.
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.
•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.
•Adjustment valves should be locked in place to prevent further
adjustment.
•Once commissioned the home owner / tenant should be informed
that the unit should not be adjusted as it will have a detrimental
effect 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.
•Speed 1 is limited to never exceed speed 2, when commissioning
speed 2 should always be set first.
18 LED Indicators
Speed 1
Speed 2
Speed 3
Supply Fan Fault
Extract Fan Fault
Frost Protection
Filter Change
HX Bypass
(AB units only)
6.3 Integral Automatic HX Bypass (AB Unit Only)
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. If this
exceeds 25°C the unit may go into bypass depending on outside
temperatures.
17 Front Panel Unit Control Detail
6.4 Thermal Bypass (Non-AB Unit Only)
In the event of excessive outside temperatures, and to help prevent
over-heating, the supply fan will automatically reduce to a trickle
speed. Under these circumstances additional ventilation measures may
be required e.g. open windows or trickle vents (if fitted).
6.5 Frost Protection
Speed 1
Speed 2
Speed 1
Speed 2
Humidity adjustment situated
behind front panel, panel must
be removed for access.
This should only be carried
out by a qualified person.
5.1 Humidity Adjustment
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.
This product contains an internal humidity sensor fitted into the
airflow 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 behind the front
panel of the unit (Figure 17) and is at its least sensitive when turned
fully clockwise. 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).
Adjustment only to be carried out by qualified person, isolate
power before removing cover.
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
27. 10. 21. Document Number 671986
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MRXBOXAB-ECO2B-1Z
Installation Manual
7.0 MAINTENANCE
9.0 END-OF-LIFE AND RECYCLING
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.
Where possible Nuaire use components which can be largely recycled
when the product reaches its end-of-life:
Isolation - Before commencing work make sure that the unit,
switched live and control are electrically isolated from the mains
supply and switched live supply.
7.1 Routine Maintenance
Nuaire recommend that filters are inspected every 6 months and
replaced every 12 months. A flashing LED (Section 6.2) will indicate that
a filter change is required. This indication repeats every 12 months and
will turn off 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 removal loop on
the front edge of the filter. Once the filters have been inspected return
or replace them as necessary.
Inspect the heat exchanger every 5 years. Generally check for damage
and security of components. Refit cover.
19 Filter Removal
•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.
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.
10.0 AFTER SALES AND REPLACEMENT PARTS
Heat exchanger
MVHR unit cover
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.
The supply cable must be replaced by an electrically competent
person.
Telephone 02920 858 400
[email protected]
Filter
Filter cover
Outer enclosure cover
8.0 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.
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.
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.
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
27. 10. 21. Document Number 671986
9
Installation Manual
MRXBOXAB-ECO2B-1Z
NOTES
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
27. 10. 21. Document Number 671986
10
Installation Manual
MRXBOXAB-ECO2B-1Z
NOTES
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
27. 10. 21. Document Number 671986
11
Installation Manual
MRXBOXAB-ECO2B-1Z
NOTES
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
27. 10. 21. Document Number 671986
12
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