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05. 11. 21. Document Number  671999

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

MRXBOXAB-ECO-LP2B (Standard Unit)
MRXBOXAB-ECO-LP2-OHB (Opposite Hand Unit)

Mechanical Ventilation Unit with Heat Recovery for Ceiling Void Mounting 

Installation Manual

EMC Directive

 

2014/30/EU

LVD Directive

 

2014/35/EU

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

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-ECO-LP2B

Page 1: ...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 carr...

Page 2: ...r to be removed and provide sufficient access for maintenance such as filter change The fan must be installed indoors in a suitable ceiling void away from direct sources of frost heat water spray or m...

Page 3: ...r of bedrooms in dwelling 1 2 3 4 5 Whole dwelling ventilation rate l s 1 2 13 17 21 25 29 1 In addition the minimum ventilation rate should be no less than 0 3 l s per m2 of internal floor area This...

Page 4: ...be at least those given in table 1 for minimum high rate 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 fur...

Page 5: ...k Supply and extract ducts from external air bricks to the unit needs to be insulated Top of ceiling void Minimum distance as specified in Building Regulations Intake air from outside via air brick 3...

Page 6: ...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...

Page 7: ...2 Speed 1 Speed 2 14 Commissioning Controls 6 0 CONTROLS 6 1 Integral Automatic HX Bypass AB Units Only Intake and extract temperatures are monitored at the point the airflows enter the unit if the ra...

Page 8: ...al Sales office for further details Failure to maintain the unit as recommended will invalidate the warranty 9 0 END OF LIFE AND RECYCLING Where possible Nuaire use components which can be largely rec...

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