1
Leaflet Number 671281 March 2007
Nuaire Home Ventilation
Western Industrial Estate Caerphilly United Kingdom CF83 1NA
Telephone:
08705 002555
Facsimile:
08705 002666
Email: [email protected] www.nuaire.co.uk
Figure 1.
MVHR-LP Units
Mechanical Ventilation with Heat Recovery
Installation and Maintenance
Figure 3.
Cut through the
acoustic foam round
the circumference of
the damper.
Damper can be
swivelled on the
2 body casing
hinges.
Fixing screw hole.
Bracket tongues
engage with casing
slots, then unit
rotated up to align
with fixing
screw hole.
Slots in casing
either side of
unit to allow
alternative
mounting option.
Figure 4.
When spigot is in
position, damper can
be adjusted using a
screwdriver.
Figure 2.
Discharge
Supply
Supply
Extract
Extract
Intake
Access cover on underside.
1.0 Introduction
The Nuaire MVHR-LP unit is designed to provide
mechanical supply and extract ventilation with heat
recovery.
The unit is fitted with two fans with ‘dial-a-duty’ control
circuit where the actual volume flow rates can be pre-set
at the commissioning stage. Once the flow rates are set
up, the fans will run at speeds necessary to produce the
desired flowrate if the system resistances are within the
operating envelope. A plate heat-exchange constructed from
recycled PVC is used to provide up to 70% heat recovery.
2.0 Installation
I
nstallation must be carried out by competent personnel
in accordance with the appropriate authority and
conforming to all statutory and governing regulations.
The fan must be fitted indoors, away from any direct
sources of heat, water spray or moisture generation.
Temperature range -5
O
C to 40
O
C.
The integral mounting bracket supplied can be offered up to
position, the fixing points marked through and the bracket
installed with 4 screws (by others).
Offer the unit into position and locate the bracket into the
slots in the case before fixing with the single bracket fixing
screw.
Various damper/inlet spigot positions can be utilised as
required to suit the system ductwork and extract grilles.
To reduce air leakage, spigots should be sealed to the unit
by silicone sealant or similar (by others).
All inlet dampers are ’closed’ as knockouts when delivered
but can be opened using a sharp knife. (See figure 3).
After the spigot has been fixed adjust the damper with a
screwdriver. (See figure 4).
See figure 5 for spigot location and sizes.
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 is designed to be wired direct to the mains supply
through a fused spur isolator (by others).
With the unit fixed in position and working from underneath
the installation bring the mains wiring through the chosen
rubber cable entry grommet at the new connection box.
Additional grommeted holes are provided to allow additional
wiring to each blower.
