NuAire MVHR-LP Installation And Maintenance

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.
Figure 1.
Discharge
Supply
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.
O
Temperature range -5 C to 40
Figure 2.
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.
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).
MVHR-LP Units
Mechanical Ventilation with Heat Recovery
Installation and Maintenance
Intake
Extract
Extract
Supply
Access cover on underside.
O
C.
Fixing screw hole.
Nuaire Home Ventilation Western Industrial Estate Caerphilly United Kingdom CF83 1NA
Telephone: 08705 002555 Facsimile:
Email: info@nuaire.co.uk www.nuaire.co.uk
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.
Figure 3.
Cut through the Damper can be
acoustic foam round swivelled on the
the circumference of 2 body casing
the damper. hinges.
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.
08705 002666
1
Figure 4.
When spigot is in
position, damper can
be adjusted using a
screwdriver.
Leaflet Number 671281 March 2007