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15. 03. 21. Document Number  671857

Nuaire | 

Western Industrial Estate 

Caerphilly 

CF83 1NA 

|

 

nuaire.co.uk

MRXBOXAB-ECO4-SC (Standard Hand Unit)

MRXBOXAB-ECO4-OHSC (Opposite Hand Unit) 

MRXBOXAB-ECO4-SW (Standard Hand Unit)

MRXBOXAB-ECO4-OHSW (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-ECO4-OHSC

Page 1: ...erson 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...

Page 2: ...nted bracket to mount the unit on Figure 5 2 0 INTRODUCTION The ECO4 wall mounted units are designed to provide mechanical supply and extract ventilation with heat recovery and an integral automatic H...

Page 3: ...o 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 Exter...

Page 4: ...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 Dwe...

Page 5: ...485 710 710 585 Ecosmart connection 4 x Spigots 180mm Internal Diameter 200mm External Diameter View from top Side view Front view 18 Mounting Bracket AB AB 200 176 534 67 492 CRS 67 40 0 CRS 5 Fixing...

Page 6: ...r 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 Arra...

Page 7: ...ring installation via a fused isolator in accordance with current IEE wiring regulations 4 2 Wiring Diagrams 4 2 1 Unit Only 14 Wiring Diagram Unit Only MAINS 230V 50Hz N L 3 Position Switch Ancillary...

Page 8: ...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...

Page 9: ...ate 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 dimen...

Page 10: ...10 15 03 21 Document Number 671857 Nuaire Western Industrial Estate Caerphilly CF83 1NA nuaire co uk MRXBOXAB ECO4 SC SW Installation Manual NOTES...

Page 11: ...11 15 03 21 Document Number 671857 Nuaire Western Industrial Estate Caerphilly CF83 1NA nuaire co uk MRXBOXAB ECO4 SC SW Installation Manual NOTES...

Page 12: ...12 15 03 21 Document Number 671857 Nuaire Western Industrial Estate Caerphilly CF83 1NA nuaire co uk MRXBOXAB ECO4 SC SW Installation Manual NOTES...

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