1
Leaflet Number 671350 July 2007
Figure 1.
MVHR-LP-AC
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 covers on underside.
1.0 Introduction
The Nuaire MVHR-LP-AC unit is designed to provide
mechanical supply and extract ventilation with heat
recovery.
The unit is fitted with two fans with independant adjustable
speed control. A plate heat-exchange constructed from
aluminium is used to provide up to 70% heat recovery.
2.0 Installation
I
nstallation must be carried out by competent personnel
conforming to all statutory and governing regulations
including the current wiring and CDM regulations.
Special attention must be paid to the size and weight of the
unit and the handling method to locate the unit in situ.
The unit is designed to be ceiling mounted in the horizontal
plane with access panels and condensate drain on the
underside.
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.
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.
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.
The condensate drain must be connected via a trap into
either a suitable waste water system or to the outside of
the building. This connection must be detachable to allow
access into the unit. Ensure the pipe from the condensate
drain falls away from the unit.
Nuaire 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