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Installation Manual
2.0 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 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.
Bypass operation can be disabled via a manual switch in colder
months so the unit recovers heat continually.
2.1 Code Description
1
MRXBOXAB-ECO
1. Range:
MRXBOXAB-ECO
2. Unit Size:
4 = Size 4 Unit
3. Unit Handing
[none] = Standard Handing
OH
4. Speed Control Variant:
SC
module
SW
cooling module is connected.
3.0 MECHANICAL INSTALLATION
1
Airflow Through unit (Standard Hand Unit)
Intake air
from outside
Intake air
Exhaust air
from outside
from house
Exhaust air
to outside
from house
to outside
2
Airflow Through OH unit (Opposite Hand Unit)
Extract air
from house
Extract air
from house
Supply air
to house
Supply air
to house
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.
Nuaire |
Western Industrial Estate
2
-
3
4
4
-
OH
SC
= Opposite Handing
= For use with inline cooling
= For use when no additional
Supply air
to house
Supply air
to house
Extract air
from house
Extract air
from house
Exhaust air
from house
Exhaust air
to outside
from house
to outside
Intake air
from outside
Intake air
from outside
|
|
| nuaire.co.uk
Caerphilly
CF83 1NA
MRXBOXAB-ECO4-SC/SW
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.
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.
•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 (Figure 3).
•Install the unit on the wall by ensuring the bracket on the
unit interlocks over the wall mounted bracket (Figure 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° to
assist this operation and subsequent cable routing.
3
Wall Mounting Bracket
3.1 Solid Wall Mounting
The MVHR unit fixed to a solid wall construction using a
suitable mounting structure (supplied by others).
4
Solid Wall Mounted Unit Installation
Ducting in the
ceiling void.
Side view of unit
mounted on the
block wall in a
cupboard.
MVHR-DRAIN
Condensate drain,
uninsulated drain
o
pipe with min 5
fall running to SVP.
11. 09. 23. Document Number 671857
Valve in ceiling.
2
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