2
30. 06. 21. Document Number 671864
Nuaire |
Western Industrial Estate
|
Caerphilly
|
CF83 1NA
|
nuaire.co.uk
MRXBOXAB-ECO4-1Z(SC/SW)
Installation Manual
2.0 INTRODUCTION
The ECO4-1Z 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 (MVHR) unit and
attenuator inside an acoustically lined enclosure.
The MVHR unit is fitted with two independent fans to provide
mechanical supply and extract ventilation, 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. The
units also incorporate an integral humidistat and frost protection.
Bypass operation can be disabled via a manual switch in colder months
so the unit recovers heat continually.
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
1
Airflow Through unit (Standard 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
2
Airflow Through OH unit (Opposite Hand Unit)
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.
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.
A minimum of 480mm is required 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 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.
3.1 Transport Fixings
To prevent damage during transit and installation, the product is
shipped with two transportation brackets, these are attached to the
upper screws of the MVHR front panel (Figure 3). These brackets must
be removed before use, failure to do so will result in excessive vibration
and noise. The screws securing the bracket to the side panel of the
enclosure can be removed and discarded, the remaining screws securing
the bracket to the MVHR unit can be loosened allowing the bracket to
be removed before fully tightened to secure the panel in place.
A
A
Transportation
bracket
3
Transportation Fixings
3.2 Floor Mounting (Recommended)
Due to the size and weight of the unit, floor mounting is the preferred
mounting method, if this is not possible a solid wall is required. A
gypsum block/plasterboard wall will not suffice, examples of suitable
installations are shown in this document.
The unit is not supplied with any mounting brackets; a suitable
mounting structure with means of securing the unit in place is required.
Four female M8 fixing points are available in the base panel of the
enclosure to be used to secure the unit in place, for details of these
along with compulsory support areas and features that should be
accommodated within the mounting structure (Figure 5).
No part of the enclosure should be in contact with the building
structure, the only components that should be in contact are those
used to provide the mounting structure.
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.
3.3 Optional Solid Wall Mounting
The MVHR unit fixed to a solid wall construction using a suitable
mounting structure (supplied by others).
Ducting in the
ceiling void.
Side view of unit
mounted on the
solid wall in a
cupboard using
MVHR-DRAIN
suitable mounting
structure.
Condensate drain,
uninsulated drain
pipe with min 5
o
fall
running to SVP.
Valve in ceiling.
Unit weight
= 115kG
Mounting frame
not supplied
4
Typical example of a cupboard mounted unit (Standard
unit) fixed to a block work wall.
