NuAire MRXBOXAB-ECO5-AESC User manual

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23. 11. 21. Document Number 672010
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MR-ECO-COOL-V
MRXBOXAB-ECO5-AESC Cooling Module
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. Ensure that the mains supply (Voltage,
Frequency and Phase) complies with the rating label.
•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.
•If the supply cord is damaged, it must be replaced by its service agent or similarly
qualified persons in order to avoid a hazard.
•When installing the unit, take care not to damage electrical or other hidden
components – do not drill the unit casing.
•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.
•The unit must be installed indoors, and away from direct sources of frost, heat and
water spray or moisture generation. Ambient temperature range -5 to 40 °C.
•The cooling unit is an electro-mechanical device that contains and uses R134A
refrigerant. Refrigerant weight, 0.36Kg.
•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. This unit contains
live electrical components, moving parts and refrigerant under pressure. Always site
out of reach of children and protect from vandalism and accidental damage.

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23. 11. 21. Document Number 672010
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MR-ECO-COOL-V
Installation Manual
•Keep the unit horizontal during installation and level the unit in its final position.
Once in final position, leave unit for a minimum of 4 hours before activation.
•Ensure that the airflow through the unit does not fall below 180 m3/h (50 l/s) during
operation.
•Lifting point to be used for lifting the cooling module ONLY. It must not be used to
lift the Cooling Module plus MVHR.
•Do not damage the pipes of the refrigerant circuit.
•Do not use the unit if damaged contact after sales.
•Injury to the eyes caused by escaping flammable refrigerant and hazardous gases.
1.1 Symbols
GENERAL WARNING
Signifies a general warning regarding hazard specified by supplementary information.
ELECTRIC SHOCK
This unit must be completely electrically isolated before any panels are removed. Check
mains supply and control connections.
COMPRESSED GAS
Liquefied Gas (R134a): H280: Contains gas under pressure; may explode if heated.
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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23. 11. 21. Document Number 672010
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MR-ECO-COOL-V
Installation Manual
2.0 HANDLING
Offloading and positioning of the equipment is the responsibility of
the purchaser. Items should only be lifted by competent personnel
following appropriate risk assessment.
Cooling Module Weighs 65Kg. Appropriate manual handling
assessments must be conducted before work can commence.
Combined weight of MRXBOXAB-ECO5-AESC and Cooling module
= 120+ kg. Lifting of assembled MVHR+Cooling module should be
carried out with genie-lift or similar with assembly being supported
from below.
The cooling module is supplied with a lifting point and a lifting
eyelet. This is for the lifting of the cooling module ONLY and
should NOT be used to lift the Cooling Module + MVHR.
Once the Cooling Module has been positioned and secured in place
with the side and top brackets, replaced the lifting eyelet with the
supplied plug to ensure the unit is sealed.
1 Airflow Through Unit
STANDARD HAND OPPOSITE HAND
Condensate Drain
Condensate Drain
EXHAUST TO OUTSIDE
INTAKE FROM OUTSIDE
EXTRACT FROM HOME
SUPPLY TO HOUSE
EXTRACT FROM HOME
SUPPLY TO HOUSE
EXHAUST TO OUTSIDE
INTAKE FROM OUTSIDE
3.0 DIMENSIONS
COOLING MODULE
(MR-ECO-COOL-V)
(SUPPLIED)
MVHR UNIT
(MRXBOXAB-ECO5-AESC)
(NOT SUPPLIED)
ECO5-AE-1Z-STND
(NOT SUPPLIED)
Front View
MR-ECO-COOL-V
CONTROLS
(SUPPLIED)
NTS
(Standard Hand)
DIGITAL ROOM THERMOSTAT
(CM-THERM-CONTROL)
(SUPPLIED)
SUMMER/WINTER SWITCH
(SUPPLIED)
Side fixing plate
(X2 supplied)
150mm Spigot
Condensate Drain Position
(Standard Hand)
Top Fixing Brackets
(Standard Hand)
Power Cord
(4M Approx.)
Top bracket reversed fixing
holes for opposite handed installation
458140 140
514
(covers)
144
Cooling Module lifting point
(lifting point to be used to lift
cooling module ONLY)
227144
738 (cover)
52
653
716
395
150 Spigot
57
1161
170
225
90.0
92
95
29
86.0
86.0 10
1369
16mm (min) Back Box
Not supplied
2 Fully Assembled Dimensions

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23. 11. 21. Document Number 672010
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MR-ECO-COOL-V
Installation Manual
3 Mounting Bracket Dimensions
Bracket Installation Dimensions
32 94
Underside MVHR Fixing Positions
94 34
254
704
756
756
84 272 70
427
678 3939

26.026.0
COOLING MODULE
(MR-ECO-COOL-V)
(SUPPLIED)
SIDE VIEW
MVHR UNIT
(MRXBOXAB-ECO5-AESC)
(NOT SUPPLIED)
MOUNTING BRACKET
(7713882)
(NOT SUPPLIED)
4 System Schematic
Main Power
230V 50Hz
Compressor (Cooling Module)
Ventilation Unit (MVHR)
ECO Smart connection to MVHR
DIGITAL ROOM THERMOSTAT
(CM-THERM-CONTROL)
COOLING MODULE
(MR-ECO-COOL-V)
CONTROLS
Summer/Winter
Switch
VENTILATION UNIT (MVHR)
(MRXBOXAB-ECO5-AESC)
4.0 INSTALLATION
The Cooling Module (MR-ECO-COOL-V) has been designed for use
with the MRXBOXAB-ECO5-AESC and 7713807 control only.
Isolate power supply before commencing work, ensure the Nuaire
controls are electrically isolated from the mains supply.
Recommend mounting method uses the EC05-AE-1Z-STND.
Alternatively angled brackets are available (Part Number:
7713882). However, it is the responsibility of the installer to ensure
the mounting surface for the brackets will adequately support the
combined weight of both MVHR and Cooling module (Combined
Weight = 121Kg).
4.1 General 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.
ADF 2010 DCVG: "Ensure the final location of equipment offers
sufficient space to allow access for maintenance. The fan unit module
should be installed to allow sufficient space for end of life replacement
of the whole unit or key mechanical/electrical components. This should
be achievable without the need to remove fixed structures or significant
lengths of connected ductwork.” In addition to the space requirement
the total weight of the fan unit and cooling module products should be
considered to allow the use of mechanical lifting equipment required to
safely remove and replace the product".
The unit and its controls must be installed indoors, and away from
direct sources of frost, heat and water spray or moisture generation.
Ambient temperature range -5 to 40°C.
This unit must be earthed.
When installing the unit, take care not to damage electrical or other
hidden components – do not drill the unit casing.
This units contains pressurised components.
The cooling unit is an electro-mechanical device that contains and uses
R134A refrigerant.
This unit contains live electrical components, moving parts and
refrigerant under pressure. Always site out of reach of children and
protect from vandalism and accidental damage.
Keep the unit horizontal during installation and level the unit in its final
position. Once in final position, leave unit for a minimum of 4 hours
before activation.

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23. 11. 21. Document Number 672010
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MR-ECO-COOL-V
Installation Manual
Ensure that the airflow through the unit does not fall below 180
m3/h (50 l/s) during operation. If there is insufficient air flow the
Amperage of the compressor will increase causing the compressor
to cut out.
The Cooling module MUST not be run without the specified
minimum airflow. This can result in the Cooling Module
overheating and will invalidate the warranty.
Typical installation is Floor Mounted using (ECO5-AE-1Z-STND).
Allow a minimum of 600mm in front of the MR-ECO-COOL-V to
perform maintenance and to replace the module in case of compressor
failure.
The unit must be installed in an upright position as shown for the
condensate drain.
4.2 Unit Installation
5 Unit Access
A-A
B-B
A
A
B
B
STANDARD HAND
FRONT ACCESS
OPPOSITE HAND
FRONT ACCESS
STANDARD HAND
INSTALLATION
OPPOSIT HAND
INSTALLATION
ACCESS PANEL TO
EVAPORATOR COIL
ACCESS PANEL TO
CONDENSER COIL
FRONT
FRONT
Following the MRXBOXAB-ECO5-AESC being levelled and installed on
ECO5-AE-1Z-STND.
The supplied gaskets must be installed as shown in Figure 6. Remove
the backing paper of the foam gaskets adhesive side down and align
with the holes of the MVHR unit.
Fit the spigots to the top of the Cooling Module using the Screws and
Silicone.
Lift the cooling module (Section) above the MVHR unit and lower
into place. Do not drag the unit over the foam gaskets as this may
damage foam gaskets.
Once in position secure the side brackets with the fixings supplied
(fitted to the units) and secure the top of the unit to a suitable surface
with the adjustable bracket supplied (Figure 6).
6 Foam Gasket Installation
x4 Foam Gaskets
(Adhesive side down)
4.2.1 Opposite Handed Units
The Cooling Module can be installed on opposite handed MVHR units
by rotating the module 180°. In doing this the drain, fly lead and access
to coils will be flipped to the opposite side. The drain position will be
located towards the front at the bottom of the unit.
4.3 Condensate Drain Installation
The unit provides an external 15mm Ø condensate drain pipe fitted
flush to the outer case to minimise its foot print. Conventional push on
plumbing connections, connect to the drain (MAX Outer Diameter of
fitting: 37mm).
Ensure the cooling module is installed level.
If the condensation pipe is fitted in an unheated space the pipe should
be in insulated to prevent freezing. Ensure the cooler has its own trap
separate to the MVHR.
4.3.1 Standard Hand Installation
The drain is positioned at the rear bottom corner on the right-hand side
panel on a standard hand unit.
4.3.2 Opposite Hand Installation
The unit is rotated 180°, positioning of the drain towards the front, at
the bottom corner on the left-hand side panel.
7 Condensate Pipe Connection
5.0 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 must be used it all times. Fresh-air
Intake and stale air Exhaust ducts will carry cold air in winter. Supply
air duct will carry cold air when Cooling Module is operating. Therefore
Intake, Exhaust and supply ducts will be at risk of condensation forming
on external surfaces and should all be thermally insulated.
Any duct component including ancillaries such as carbon filters must
be insulated if they are carrying colder air produced by the cooling
module. Flexible connections should be avoided. Nuaire Ductmaster
thermal ducting should be used on Intake, Exhaust and Supply duct
runs. If flexible connections cannot be avoided they should be FLDI150
Insulated Flexible Duct should be used.
Ducting must be installed in such a way that resistance to airflow is
minimised. Bends should be kept to a minimum.
Ducting joints must be sealed with silicone type sealant and needs to
be taped. Ducting shall be adequately and reliably fixed.
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.

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23. 11. 21. Document Number 672010
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MR-ECO-COOL-V
Installation Manual
6.0 SUPPLY TEMPERATURES
Supply air temperature is critical to ensure good cooling distribution.
If supplying to habitable rooms through Linear Slot Diffusers 12°C is the
recommended minimum supply air temperature.
If supply to habitable rooms is by air valve then 14°C is the
recommended minimum supply air temperature.
The possibility of condensation forming on grilles or valves should
be considered and air-flows may need to be increased to avoid this
possibility.
7.0 ELECTRICAL INSTALLATION
7.1 Electrical Details
Voltage: 230V 1ph 50Hz
Running Current: 3.5 A
This unit must be earthed.
7.2 Wiring Diagrams
7.2.1 Unit
8 Unit Wiring Diagram
7.2.2 Summer / Winter Switch (Ventilation Unit)
9 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!

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23. 11. 21. Document Number 672010
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MR-ECO-COOL-V
Installation Manual
8.0 CONTROLS / DESCRIPTION OF OPERATION
•MVHR will run continuously at Background/Whole dwelling duty
(Speed 1) unless it receives a 230v signal to Switched-Live input
connections SL1 or SL2.
•Cooling module will be enabled to run and MVHR enabled to
speed 3 by a 230v Switched live from wall mounted thermostat
CM-THERM-CONTROL (supplied).
•The wall mounted thermostat will control the cooling module and
MVHR unit. On reaching the set point (user defined) the Cooling
Module will operate and the MVHR will increase to speed 3. The
wall mounted thermostat also features a ECO mode which is pre-
set to 23°C (not adjustable) and can be set to operate between 1
and 24 hours by the user.
•It is recommended that, if possible, the cooling unit be interlocked
with the heating system to prevent triggering when heat is being
called for. Figure 8 shows connection to a heating system which is
normally closed via a link. This can be replaced by a suitable VOLT
FREE connection to the heating device. Contact Nuaire for further
information and to check compatibility.
•Supplied with a Summer/Winter switch. When set to summer
mode the MVHR will target a temperature under 20°C within the
apartment.
•Summer mode can be selected year round to attempt to mitigate
overheating caused by solar gains but must be selected when
cooling is expected to run (summer months).
•Winter mode ensures the MVHR will recover heat at all times.
•For further details, see MRXBOXAB-ECO5-AESC installation
manual (671861).
9.0 COMMISSIONING
To ensure the cooling module operates correctly and prevent
the thermal overload protection from tripping, there must be a
minimum airflow of 180 m3/h (50 l/s).
It is recommended the ventilation unit is set to speed 3 on supply
and extract, adjusters are set to maximum (fully clockwise).
To commission the MVHR unit providing the air flow through the
cooling module, please refer to MRXBOXAB-ECO5-AESC installation
manual (Document number 671861).
10.0 MAINTENANCE
Isolate before commencing work, make sure that the unit, switched
live and Nuaire control are electrically isolated from the mains
supply and switched live supply.
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.
10.1 Access
Access to both Coils for maintenance can be gained by removing
the front cover of the outer case and the inner covers of the Cooling
Module.
Depending on the orientation of the unit (standard or opposite hand)
access will be given to one of the two coils. To access the second coil an
internal access panels must be removed.
Opposite hand installation do not have access to the compressor.
The compressor is sealed-for-life and requires no maintenance.
10.2 Annual Maintenance - Evaporator and Condenser
•Inspect all heat exchangers for signs of damage or dirt. Loose dirt
may be removed by using a soft brush, taking care not to brush
the dirt into the coil, blocking the fins. Damaged fins should be
combed out using a coil comb.
•If the coil is excessively dirty check that MVHR filters are still in
place.
•Filters are to be inspected every 6 months and replaced every 12
months (or sooner if required).
•If the coil is excessively dirty, use a proprietary cleaning agent, e.g.
HYDRO-COIL or MULTISOLVE.
•Inspect the condensate drain tray and clean as required.
•Check all electrical connections for tightness.
•Switch on the power to the unit. Check the operation of the
mechanical cooling system.
•Check that all the panels are in place and that the unit is in a clean
condition.
•In the event the cooling module is not operating initially inspect
the MCB in the controls.
10.2.1 Refrigeration Circuit Components
All repair and replacement work on refrigeration components must
be carried out by a fully qualified refrigeration engineer, trained
in maintenance and refrigeration recovery, and with a sound
knowledge of all relevant safety regulations pertaining to the job.
All refrigerant in the unit must be reclaimed and disposed of safely.

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23. 11. 21. Document Number 672010
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MR-ECO-COOL-V
Installation Manual
11.0 WARRANTY
The 2 year warranty starts from the day of delivery and includes 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. Failure to
maintain the unit as recommended will invalidate the warranty.
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.
12.0 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.
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.
13.0 AFTER SALES ENQUIRIES
For technical assistance or further product information, including spare
parts and replacement components, please contact the After Sales
Department. Before calling please establish the serial number of the
unit (this information will be available on the unit label).
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.