2
17. 11. 21. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AE(OH)SW & MRXBOXAB-ECO5-AE(OH)(SC/SW)
Installation Manual
2.0 INTRODUCTION
The ECO(3/5)-AE wall mounted range of units are designed to offer
improved sound levels and an aesthetically pleasing installation by
housing a Mechanical Ventilation with Heat Recovery unit (MVHR) and
attenuator inside an acoustically lined enclosure.
The MVHR unit is fitted with two independent fans. Each fan has full
speed control for background and boost ventilation rates. 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.
Bypass operation can be disabled via a manual switch in colder months
so the unit recovers heat continually.
3.0 MECHANICAL 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 allow a minimum of 360m in front of an
MRXBOXAB-ECO(3/5)-AE 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 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.
1
Airflow Through unit (Standard Unit)
Intake air
from outside
Extract air
from house
to house
Supply air
Exhaust air
from house
to outside
Extract air
from house
Intake air
Exhaust air
from outside
from house
to outside
Supply air
to house
2
Airflow Through OH unit (Opposite Hand Unit)
Intake air
from outside
Extract air
from house
to house
Supply air
Exhaust air
from house
to outside
Extract air
from house
Intake air
Exhaust air
from outside
from house
to outside
Supply air
to house
3.1 Transport Fixings
To prevent damage during transportation the product is shipped with
securing fixings, these can be found front and centre of the enclosure
top panel (Figure 3). These must be removed before use, failure to do so
will result in excessive vibration and noise. The screws removed can be
discarded and replaced with rubber caps provided.
3
Transport Fixings
Spigot fixing plate
Transportation fixings
3.2 Wall Mounting
The unit is designed for wall mounting on a solid wall only, a
gypsum block/plasterboard wall will not suffice.
Examples of suitable installation are shown overleaf. The wall brackets
supplied should be secured to the wall using suitable fixings (supplied
by others) as per the dimensions given in figure 4. The head of the
chosen fixing should protrude no more than 8mm from the wall
bracket. The enclosure assembly can then be lifted using suitable
equipment and moved into position so it is sitting directly on the wall
brackets (ensuring the rear panel of the enclosure is not in contact
with the wall bracket fixings). The enclosure can be secured to the wall
brackets using the 4x M8 fixings supplied.
No part of enclosure should be in contact with the building structure,
the only components that should be in contact are the wall mounting
brackets.
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.
4
Wall Bracket Installation Dimensions
25
25
704 crs
9.1 dia.
30
94
94
33
