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17. 11. 21. Document Number  671861

Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk

MRXBOXAB-ECO3-AESW (Standard Hand Unit)

MRXBOXAB-ECO3-AEOHSW (Opposite Hand Unit)

MRXBOXAB-ECO5-AESC (Standard Hand Unit)

MRXBOXAB-ECO5-AEOHSC (Opposite Hand Unit)

MRXBOXAB-ECO5-AESW (Standard Hand Unit)

MRXBOXAB-ECO5-AEOHSW (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 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. 

Summary of Contents for MRXBOXAB-ECO5-AESC

Page 1: ...cerning 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 i...

Page 2: ...se 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 h...

Page 3: ...ing the wall MVHR DRAIN brackets Condensate drain uninsulated drain pipe with min 5o fall running to SVP Valve in ceiling Unit weight 56kG 3 3 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 solve...

Page 4: ...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 m 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 expe...

Page 5: ...ut 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 8 Dimensions 11 Unit Dimensions 754 5 2 7 ...

Page 6: ...ceilings via Air Valve mounted unit Nuaire wall MVHR DRAIN Condensate drain uninsulated drain pipe with min 5o fall running to SVP Insulated extract duct 3 9 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...

Page 7: ... underside of the MVHR unit within The cable should be fed through rubber blanking plug to provide a seal when the cover is re fitted 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 Optiona...

Page 8: ...en 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 sho...

Page 9: ...ve a full description of the part required The serial number will be found on the identification plate attached to the unit casing Telephone 02920 858 400 aftersales nuaire co uk 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 MAINTENANC...

Page 10: ...10 17 11 21 Document Number 671861 Nuaire Western Industrial Estate Caerphilly CF83 1NA nuaire co uk MRXBOXAB ECO3 AE OH SW MRXBOXAB ECO5 AE OH SC SW Installation Manual NOTES ...

Page 11: ...11 17 11 21 Document Number 671861 Nuaire Western Industrial Estate Caerphilly CF83 1NA nuaire co uk MRXBOXAB ECO3 AE OH SW MRXBOXAB ECO5 AE OH SC SW Installation Manual NOTES ...

Page 12: ...12 17 11 21 Document Number 671861 Nuaire Western Industrial Estate Caerphilly CF83 1NA nuaire co uk MRXBOXAB ECO3 AE OH SW MRXBOXAB ECO5 AE OH SC SW Installation Manual NOTES ...

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