The EMC Directive
2014/30/EU
The Low Voltage
Directive
20
14
/35/E
U
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.
MRXBOX95B-450 WC and 450
Mechanical Ventilation Unit with Heat Recovery and
Summer Bypass for Wall Mounting
Installation and Maintenance
27. 11. 17. Leaflet number 671617
Ducting in
ceiling void.
Side view of unit
mounted on the
wall in a cupboard in
upright position as
shown to comply
with safety regulations.
Condensate drain,
uninsulated drain
pipe with min 5
o
fall
running to a soil
vent pipe.
Valve in ceiling.
Extract air
from house
Intake air
from outside
Exhaust air
from house
to outside
Supply air
to house
Unit weight is 30kg.
1.0 Introduction
The MRXBOX95B-450 WC and MRXBOX95B-450 wall mounted
units are designed to provide mechanical supply and extract
ventilation with heat recovery and summer bypass.
It also incorporates an integral humidistat and frost protection
(-5 degrees C as standard).
The unit is supplied with independent control for both supply and
extract for 3 speeds.
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.
Figure 1. Airflow through unit in standard configuration.
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 600mm in front of the unit and 200mm
on the humidistat adjustment side. The (450 WC unit only) will also
require a minimum of 400mm above the unit for access to the
receiver in its standard position. Alternatively, the receiver may be
fitted away from the unit as it is wired with a flying lead.
The fan must be installed indoors, on a suitable wall away from direct
sources of frost, heat, 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 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), ensuring the interlock side is at the top, (fig. 2).
2.
Install the unit on the wall by ensuring the bracket on the unit
interlocks over the wall mounted bracket (fig. 3).
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.
Figure 2. Fixing the mounting bracket to the wall.
Figure 3. Mounting the unit on the wall mounted bracket.
Figure 4. Typical example of a cupboard mounted unit on a wall using
the bracket.
Nuaire: A Trading Division of Polypipe Limited
Western Industrial Estate
Caerphilly United Kingdom CF83 1NA
T: 029 2088 5911 F: 029 2088 7033 E: [email protected] W: www.nuaire.co.uk
1
