2
nuaire.co.uk
029 2085 8400
28. 07. 20. Leaflet Number 671838
Installation and Maintenance
The MRXBOXAB-ECO4-1Z Range of Units
2.2 Optional 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
Figure 4. Typical example of a cupboard mounted unit (Standard
unit) fixed to a block work wall.
2.4 Condensate Drain
An additional straight multi-fit connector is included with the ancillary
items supplied to extend the condensate drain connection of the MVHR
unit outside the enclosure. The threaded connector should be coupled
to the corresponding connection of the MVHR unit through the square
cut out in the base panel of the enclosure. Care should be taken to not
over tighten this joint as this may result in the inner drain connection
coming loose making removal difficult if required in the future.
The threaded nut can then be removed from the multi-fit connector
and the adhesive backed cover plate passed over the multi-fit
connector and affixed to the enclosure base panel, see Figure 6.
2.3 Transportation 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 pa
nel (Figure 5)
. 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.
2.1 Mounting the MVHR Unit
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,
however, a structural engineer should be consulted. A gypsum block/
plasterboard wall will not suffice.
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, see Figure 3.
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.
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.
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.
A
A
Transportation
bracket
B
B
Multi-fit
Connector
Cover Plate
Enclosure
Base Panel
Figure 5. Transportation fixings
Figure 6. Condensate connections
