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-WH1
Mechanical Ventilation Unit with Heat Recovery
& Summer Bypass for Wall Mounting
Installation and Maintenance
1.0 Introduction
MRXBOX95B-WH1 wall mounted unit is designed to provide
mechanical supply and extract ventilation with heat recovery
and incorporates summer bypass.
The 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.
The bypass damper opens automatically via a wax actuator when
the outside air reaches 20°C, when the outer air temperature
returns below this level the unit returns to its original state.
Outside air supplied through the bypass is still being filtered,
so the air quality is optimal, irrespective of the bypass setting
(open or closed)
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 250mm in front of the unit.
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 via a patress.
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. Fix the remaining part of the bracket to the unit using the
M5 screws ensuring the interlock side is at the bottom, fig.3a.
3. Install the unit on the wall by ensuring the bracket on the
unit interlocks over the wall mounted bracket (fig. 3b).
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.
Nuaire Limited
Western Industrial Estate Caerphilly United Kingdom CF83 1NA
T: 029 2085 8400 F: 029 2085 8444 E: [email protected] W: www.nuaire.co.uk
1
21. 06. 13. Leaflet Number 671556
Extract air
from house
Intake air
from outside
Exhaust air
from house
to outside
Supply air
to house
Figure 1. Airflow through unit.
The EMC Directive
2004/108/EC
The Low Voltage
Directive
2006/95/EC
Figure 3a. Fixing the mounting
bracket to the rear of unit.
Pre-fitted
support feet
Bracket
Figure 3b. Mounting the unit
on the wall mounted bracket.
Figure 2. Fixing the mounting bracket to the wall via a patress.
150mm dia.
ducting in
ceiling void.
First floor ceiling.
Side view of unit
mounted on the
wall in a cupboard.
(Note: The unit must
be fixed to a suitable
patress).
MVHR-DRAIN
Condensate drain,
uninsulated drain
pipe with 10 fall
running to SVP.
o
Supply air valve in ceiling.
Figure 4. Typical example of a cupboard mounted unit on a patress
using the bracket.
