NuAire Ecosmart MRXBOX95AB-WH2 Installation And Maintenance Manual

1.0 Introduction
The MRXBOX95AB-WH2 wall mounted units are designed to
provide mechanical supply and extract ventilation with heat
recovery and an integral automatic HX bypass.
The units also incorporate an integral humidistat and frost
protection (-5 degrees C as standard).
Integral automatic HX bypass - The bypass damper shall open
automatically via a wax actuator allowing the air to bypass the heat
exchanger to deliver fresh filtered air during the warmer months.
The unit is supplied with independent control for both supply and
extract for 3 speeds.
To recover heat from the extract air the heat exchanger block is
utilised. The heat exchanger can recover up to 95% of the normally
wasted heat.
Figure 1a. Airflow through unit (Standard configuration).
Intake air
from outside
Exhaust air
from house
to outside
Figure 1b. Airflow through unit (Opposite hand configuration).
Extract air
from house
Supply air
to house
Nuaire: A Trading Division of Polypipe Limited Western Industrial Estate Caerphilly United Kingdom CF83 1NA
T: 029 2088 5911 F: 029 2088 7033 E: info@nuaire.co.uk W: www.nuaire.co.uk
MRXBOX95AB-WH2 (Standard Unit)
MRXBOX95AB-WH2-OH (Opposite Hand Unit)
Mechanical Ventilation Unit with Heat Recovery and
Heat Exchanger Bypass for Wall Mounting
Installation and Maintenance
Supply air
to house
Extract air
from house
Exhaust air
from house
to outside
Intake air
from outside
The unit must remain switched on at all times to maintain ventilation
within the dwelling. Turning the unit off will cause long term damage to
the unit and building fabric.
This appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they have been given supervision or
instruction concerning the use of the appliance by a person for their
safety. Children should be supervised so that they do not play with
the appliance.
2.0 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.
Please note a clear working space is required around the installed unit
to allow the cover to be removed and provide sufficient access for
maintenance such as filter change.
Please allow a minimum of 415mm in front of the unit and 200mm
on the humidistat adjustment side.
The fan must be installed indoors, on a suitable wall away from direct
sources of frost, heat, water spray or moisture generation.
For a vibration-free result the unit must be mounted to a solid wall.
The unit is designed for wall mounting only on a solid wall, a gypsum
block or a stud wall will not suffice. Additional measures such as
extra studs or double panelling using 20mm MDF is required.
1. One part of the mounting bracket should be offered up to the
wall, ensuring it's located horizontally. Mark the fixing points
through the pre drilled holes in the bracket and install with screws
(by others), ensuring the interlock side is at the top, (fig. 2).
2. Install the unit on the wall by ensuring the bracket on the unit
interlocks over the wall mounted bracket (fig. 3).
Note: Care must be taken to ensure the unit is installed true in
all 3 dimensions. Failure to do so may result in overflow from the
internal condensation drip tray.
Figure 2. Fixing the mounting bracket to the wall.
(See overleaf for wall mounting option details).
1
The EMC Directive
2014/30/EU
The Low Voltage
Directive
2014/35/EU
27. 11. 17. Leaflet number 671643