NuAire mrXbox70 Installation And Maintenance

1.0 Introduction

mrXbox70 is designed to provide mechanical supply and
extract ventilation with heat recovery.
Figure 1.
The unit is fitted with two independent fans. Each fan has
full speed control for background and boost ventilation
rates as well as a run-on timer facility. To recover heat
from the extract air an aluminium heat exchanger block is
utilised. This heat exchanger can recover over 70% of the
normally wasted heat.
Figure 2. Fixing the unit to the wall.
Two mounting
bracket tongues
engage with slots
in top edge of unit
casing.
Align bottom of
mounting bracket
to engage with the
fixing screw holes
on the base of the
unit.
Nuaire Limited Western Industrial Estate Caerphilly United Kingdom CF83 1NA
T: 029 2088 5911 F: 029 2088 7033 E: info@nuaire.co.uk W: www.nuaire.co.uk
mrXbox70
Mechanical Ventilation
with Heat Recovery
Installation and Maintenance
Bracket
tongues
fixing screw holes are
located in base of unit.

2.0 Installation

Installation must be carried out by competent personnel in
accordance with the appropriate authority and conforming
to all statutory governing regulations.
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.
The fan must be installed indoors, away
from any direct sources of heat, water
spray or moisture generation.
Temperature range –5 to 40
The unit is designed for wall mounting only.
The integral mounting bracket should be
offered up to the wall and the fixing points
marked through and the bracket installed
with 4 screws (by others). (figure 2).
To aid installation the case is split into
two halves. To split the case firstly remove
the front cover. Remove the four lower
screws and loosen the top two.
The top section can now be removed. The
rear section can be offered up to the
Figure 3.
bracket and secured with the two screws
(see figure 3).
Note:
Carry out all required electrical connections
before fitting the front section. Refer to section 4.0.
Figure 4.
Cut through the Damper can be
acoustic foam round swivelled on the
the circumference of 2 body casing
the damper. hinges.
Various damper/inlet spigot positions can be utilised as
required to suit the system ductwork and extract grilles.
All inlet dampers are 'closed' as knockouts when delivered
but can be opened using a sharp knife. (See figure 4).
After the spigot has been fixed adjust the damper with a
screwdriver. (See figure 5). Fit front section and secure
with screws previously removed/loosened.
See figures 6 and 8 for spigot location and sizes.
1
The EMC Directive
2004/108/EC
The Low Voltage
directive
2006/95/EC
O
C.
Figure 5.
When spigot is in
position, damper can
be adjusted using a
screwdriver.
Leaflet Number 671365 October 2009