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nuaire.co.uk
029 2085 8400
19. 08. 19. Leaflet Number 671797
MRXBOXAB-ECO4 (Standard Unit)
MRXBOXAB-ECO4-OH (Opposite hand Unit)
Mechanical Ventilation Units with Heat Recovery and
Heat Exchanger Bypass for Wall Mounting
Installation and Maintenance
The EMC Directive
2014/30/EU
The Low Voltage
Directive
2014/35/EU
1.0 Introduction
The ECO4 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
(see page 7 for details).
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.
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 480mm in front of the unit.
The fan must be installed indoors, on a suitable wall away from direct
sources of frost, heat and 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 (supplied) 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), whilst ensuring the interlock side is at the top (fig. 3).
2. Install the unit on the wall by ensuring the bracket on the unit
interlocks over the wall mounted bracket (fig. 4). Ensure the mains
power cable does not become trapped between the brackets during this
process as this will prevent engagement and potentially damage the
electrical insulation. The cable gland can be rotated through 90 degrees
to assist this operation and subsequent cable routing.
IMPORTANT
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.
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.
If fitting the MVHR in conjuntion with a MRXBOX-SIL4 the unit
should be mounted using alternative brackets supplied under part
code MRXBOX-AV4, the standard wall brackets supplied with the
MVHR are not rated for the additional load.
Extract air
from house
Intake air
from outside
Exhaust air
to outside
from house
Supply air
to house
Exhaust air
to outside
from house
Supply air
to house
Extract air
from house
Intake air
from outside
Figure 1. Airflow through unit (Standard unit).
Figure 2. Airflow through OH unit (Opposite hand unit).
Figure 3. Fixing the mounting bracket to the wall.