NuAire MRXBOX95-WM1 User Manual

1
28. 10. 20. Document Number 671684Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOX95-WM1 (Standard Unit)
MRXBOX95-WM1 -OH (Opposite Hand Unit)
MRXBOX95AB-WM1 (Standard Unit)
MRXBOX95AB-WM1-OH (Opposite Hand Unit)
Mechanical Ventilation Units with Heat Recovery for Wall 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.

NuAire MRXBOX95-WM1 Specifications

General

Model	MRXBOX95-WM1
Duct Size	125mm
Material	Galvanized steel
Type	Mechanical Ventilation with Heat Recovery
Application	Ventilation
Mounting Type	Wall Mounted

Summary

SAFETY INFORMATION

Hazard Symbols

Refer to instruction manual for installation, operation, and maintenance.

Important Information

Contains general safety instructions and warnings for product assembly, operation, and maintenance.

Personal Protective Equipment

Lists minimum recommended PPE for handling Nuaire products safely, including eye, hand, and foot protection.

INTRODUCTION

MECHANICAL INSTALLATION

Wall Mounting Options

Details methods for mounting the MVHR unit onto solid walls or non-solid walls using brackets.

Condensate Drain

Explains how to discharge condensate using a U-trap or MVHR-DRAIN, including pipe requirements and insulation.

Extract / Input Areas

Specifies rooms for extract air and supply air, and requirements for grilles and external grilles.

Ducting

Provides recommendations for ducting installation, material, resistance, insulation, and joint sealing.

Ventilation Flow Rates

Details ADF 2010 extract ventilation rates for different rooms and minimum/maximum flow rates.

ADF 2010 Ventilation Calculations

Guides on calculating whole dwelling ventilation rates based on bedrooms and air permeability.

Pre Commissioning MRXBOX MVHR Units

Instructions for pre-commissioning the unit, including filter checks and handling high moisture during drying.

Ducting Arrangements

Illustrates typical circular and rectangular ducting arrangements for wall-mounted units.

Dimensions (mm)

Unit Dimensions

Provides detailed measurements of the unit from front, side, and top views.

ELECTRICAL INSTALLATION

Electrical Information

Specifies voltage, frequency, phase, and consumption for the unit.

Optional Connections

Details connections for compatible sensors using IDC plug-in connectors.

Wiring Diagrams

Presents wiring diagrams for unit serving kitchen/bathroom and kitchen/two bathrooms.

COMMISSIONING

Thermal Bypass (Non AB models)

Explains thermal bypass function and measures for overheating prevention.

Status Indication

Describes the function of LEDs on the front panel for indicating unit status and faults.

MAINTENANCE

Filters

Details filter inspection and replacement schedule, and the procedure for removing and replacing filters.

WARRANTY

END-OF-LIFE AND RECYCLING

AFTER SALES AND REPLACEMENT PARTS