NuAire DRI-ECOSMART/1 Installation guide

Nuaire Home Ventilation Western Industrial Estate Caerphilly United Kingdom CF83 1NA
Telephone: [phone] Facsimile: 87 5 2666
Email: [email protected] www.nuaire.co.uk
Low Energy Positive Input Ventilation Unit
DRI-ECOSMART/ 1 or 2
Installation and Maintenance Details
The EMC Directive
9/336/EEC
With modification
92/31/EEC
The Low Voltage
directive 73/23/EEC
1Leaflet Number 671346 October 2 6
Power Status
Figure 1. General view of unit in a loft.
(Shown located on AV mounts).
User control panel, located in the home.
Please note:
1. Only the items shown shaded
are supplied as standard with
the unit.
All other installation materials
(see table on page 3) must be
purchased separately by the
installer.
2. The 4 temperature sensors
(one for each of the air inlet
locations and one for the
home itself) and associated
sensor cables (15m long) are
also supplied with the unit.
3. The cable (10m long)
connecting the unit to the user
control is also supplied.
1.0 Important notes to installers
The successful operation of the unit depends entirely upon
installation and ongoing maintenance being carried out strictly
in accordance with these instructions.
Please read this guide in its entirety before installation and then
repeat the exercise step by set to ensure satisfactory completion.
Suitably qualified persons may achieve installation of the unit,
however the provision of the electrical supply and the connection of
the unit to the mains supply should only be carried out by a qualified
electrician.
The unit can be installed in a home with a “cold roof” construction.
These instructions are limited to installation in a home with a
“cold roof”. “Warm roofs” vary considerably and advice should
be sought from Nuaire on an individual basis.
2.0 General description
The unit is a unique Low Energy Positive Input Ventilation (LEPIV)
unit. Unlike conventional LEPIV units which only draw in external
air via the loft in a “cold roof’, the unit is capable of drawing in
external air from different roof locations via three air inlet spigots
each fitted with their own low energy open/close damper. (See fig. 1).
The units airflow and the opening/closing of each air inlet damper
is controlled via an integral intelligent control system that measures,
and appropriately responds to, temperatures at the various air inlet
locations, the home itself, the “target temperature” selected by the
occupants on the user control panel provided and the delivered air
temperature into the home.
There are two standard versions of the unit
available. Each is coded/identified as follows:
DRI-ECOSMART/1 Unit supplied with control panel providing
On/Off/Auto/Boost/Target Temperature
selection and Unit/Filter Status Indication.
DRI-ECOSMART/2 Unit supplied with control panel providing
Target Temperature selection and Unit/Filter
Status Indication.

3.0 Loft inspection
Check to ensure that the loft has adequate ventilation. Look for
ridge vents, tile vents, eaves vents and continuous air gaps etc.
making sure none are blocked. In older properties these vents may
not be provided. However, there should be enough ‘leakage’ to
accommodate the requirements of the unit. A useful way of
checking such lofts is to close the hatch, switch off the lights and
look for any daylight penetration. If you can see daylight it is
reasonable to assume that the loft has sufficient ventilation.
There may be occasions where a loft is so well sealed that additional
ventilation may have to be provided by the owner/occupier or the
unit installer.
This will not only assist the operation of the unit, but will help
prevent possible expensive structural damage caused by inadequate
air movement in the loft itself.
It should be noted that there cannot be too much ventilation into
the loft.
Additional checks should be carried out as follows:
■ Ensure that all water tanks are covered and sealed.
■ Check that all water pipes are sealed.
■ Ensure that any extract fans are discharging to outside
and not into the loft.
■ Check that the loft hatch is tightly sealed.
■ Ensure all holes in the ceilings are sealed i.e. ceiling
light fittings etc.
■ A visual inspection of flues or chimneys for leakage
in the loft should be carried out by the installer.
If leakage points are found, or if there is any doubts
regarding the same the installer should advise the
house owner/provider and seek instruction from them
before continuing with installation.
4.0 Siting the Diffuser
The diffuser has a unique air discharge pattern and it must be located
correctly in the central hallway in single storey properties or in the
ceiling of the top floor landing on 2 or more storey dwellings.
As can be seen (Figure 2) the diffuser discharges air from all four
sides along the underside of the ceiling. The majority of the air is
discharged through the two longer open sides and it is vital that the
diffuser is positioned to ensure these two sides discharge the air
down the longest lengths of the hallway or landing.
Obstructions within 1m of the diffuser will cause a poor airflow
pattern and unacceptable draughts. Up to two sides of the diffuser
may be closed off using the foam strips supplied.
5.0 Fitting the Diffuser
Cut a circular hole 225mm diameter in the ceiling between two
joists. Position the diffuser frame and secure to the underside of
the ceiling with the 11/2” x 8 csk screws and plugs provided.
Attach the diffuser plate to the frame using the two 1” x 8 csk
screws and plugs provided. (See figure 3).
Where there is a requirement for maintaining fire rating of the ceiling
then the following alternative method of installing the diffuser using
a 2 mm dia. spigot available from Nuaire and a “Fireblock” is
recommended. (See figure 4).
Designed to provide 1 hour of fire resistance in accordance with
BS476 Part 2 (1987) and ISO 834, this circular “Fireblock” is
available to fit snugly inside our standard 2 mm dia. spigot.
(Part No. 1174 ).
Foam strips should also be used as required when this method of
installing the diffuser is used.
Installation and Maintenance Low Energy Positive Input Ventilation Unit
Foam strip being used to guide
airflow away from a smoke
detector and/or obstructions
as required (See notes)
The strips will fit on any side.
Simply remove the relevant 'pushouts
provided in each strip
Diffuser
assembly
screws
AIRFLOW
Figure 2.
Note: Smoke Detectors
It is important that any open side of the diffuser is not
positioned within 1m of a smoke detector.
If the diffuser cannot be repositioned, up to two sides
of the diffuser may be closed off using the foam strips
supplied so that the open sides face a minimum 1.5m
unobstructed path away from the detector.
As an alternative to the aforementioned, a smoke detector
maybe fitted directly onto the underside of the diffuser.
Figure 3.
2Leaflet Number 671346 October 2 6
Screw bottom part
of diffuser to the
ceiling via plastic
spacers by the
installer
2 mm dia. outlet
spigot with rim fitted
flush to ceiling,
(Part No. 1174 )
Diffuser
"Fireblock" Standard "V"
195 mm outside dia.
available from Dufaylite
(See website
www.dufaylite.com)
fits inside of spigot
and retained with self
tapping screws by the
installer
Ceiling
Flexible ducting
from unit
Figure 4.

Installation and Maintenance Low Energy Positive Input Ventilation Unit
6.0 Fitting the Main Fan Unit
The main fan unit is supplied with eyelets for suspension between
the roof trusses. It is the responsibility of the installer to supply and
fit suitable hanging brackets/wires (See Figure 5).
Install the unit in a position that ensures that all ducting takes the
least complex route.
The main fan unit should be positioned to ease maintenance. Please
note that a clear distance of 5 mm should be available above the
unit to allow access for maintenance.
The fan unit can also be mounted directly onto the roof joists using
an AV mounting kit available from Nuaire (Part No. 771393).
Screw the battens (not supplied), to the unit via the 5mm dia. holes
in the base under the filters, then lower complete onto the joists.
(See Figure 6).
Mark and drill the 12mm dia. clearance holes required in the ends of
the battens and place anti-vibration mounts above and below each
batten fixing point. Using the four large screws and special
washers, fix the unit to the joists.
Do not over tighten fixings. The distance from the top washer to
the joist when installed must not be less than 50mm.
7.0 Main fan unit air outlet connection
The main fan single air outlet spigot should be connected to the
diffuser spigot using a length of 2 mm diameter insulated
ducting and dynotie connector, both supplied by the installer.
.0 Main fan units air inlet and
associated sensor connections
As explained previously the unit is capable of drawing in external air
from different roof locations via three air inlet spigots each fitted
with their own low energy open/close damper. Air inlet locations
may include the following:
1. A portion of the roof tiles/slates on a southerly facing
roof (using them to heat or cool the outside air) using felt
(or breather membrane fitted in a similar way) spacers, a
specially created insulated plenum and insulated ducting all
supplied by the installer, (see .1).
2. The loft space at high level through uninsulated ducting
supplied by the installer, (see .2).
3. Depending on the property, ONE of the following options:
a) The soffit through a grille and ducting supplied by
the installer, (see .3).
b) or wall grille and ducting supplied by the installer, (see .4).
c) or roof tile vents by others and ducting supplied by
the installer, (see .5).
The following installation materials, not supplied with the
unit, can be purchased separately by the installer direct
from Nuaire Home Ventilation, Tel: [phone]
Fax: [phone]. E-mail: [email protected]
Part No Description
190554 5 m by 1. 5m roll of foil backed bubble wrap
insulation. Type as manufactured by Encon
Insulation or equivelant. This is used to create
the plenum (See 8.1) to the underside of the rafters
and should be sufficient for 3 average plenum
installations.
011694 Galvanised steel felt spacers.
For use when plenum created (See 8.1).
Approximately 2 are required per installation.
011231 2 mm dia. spigot with venturi for connecting
duct to plenum (See 8.1).
140452 6 mm long foam wedges, 125 x 1 x 16 mm
used to seal the plenum chamber (See 8.1).
Approximately 18 are required per installation.
190553 45m long roll of aluminium foil tape used to
seal the plenum chamber (See 8.1).
Should be sufficient for 3 average installations.
PVC 933WH 3m length of 222mm x 9 mm flexible PVC ducting
for use on soffit inlets (See 8.3). This length
should be sufficient for 3 average installations.
51 920 128mm x 26 mm soffit grille (See 8.3).
FDC 200 2 mm duct connector for connecting 222 x 9
flexible duct to 2 dia. insulated duct (See 8.3).
FB250 199 x 215 x 2 mm white plastic wall grille (See 8.4).
GB250-T200 15 mm dia. pipe for wall grille (See 8.4).
541044 Dynotie Zip ties, used for connecting 2 mm
ducting to spigots. 8 off should be sufficient
for all types of installation.
FLDI 200 5m length of 2 mm dia. insulated ducting.
FLD 200 5m length of 2 mm dia. un-insulated ducting.
011740 2 mm dia. outlet spigot.
For use with “Fireblock” (See figure 4).
771393 AV mounting kit (See figure 6).
Please note that Nuaire do not supply any timber for the AV
mounts or the installation of the plenum to the rear of the rafters.
Typical installation details of each of the aforementioned air inlet
arrangements using the material above are detailed on the
following page. The installer may use alternative materials to
those above. In these circumstances Nuaire cannot take
responsibility for their suitability.
Figure 6. Fan unit shown mounted on roof joists using AV mounts.
Figure 5. Fan unit shown suspended.
3Leaflet Number 671346 October 2 6
Washer 3” Woodscrew
A.V. mount
A.V.
mount
Batten 25x5
Ceiling
joist
5 mm
min.
12mm
clearance
hole

.1 Via a portion of the roof tiles/slates on a
southerly facing roof (using them to heat or
cool the outside air) using felt (or breather
membrane fitted in a similar way) spacers,
a specially created insulated plenum and
insulated ducting supplied by the installer.
In order to draw external air in via the tiles/slates, a plenum, as
airtight as possible, has to be constructed by the installer. Ideally
the plenum should be around 1 -15 m2. Roof structures vary and
the diagrams that follow are for indication purposes only. It is the
responsibility of the installer to ensure that there is sufficient air
movement across rafters, that the plenum is as airtight as possible
and that the felt (or breather membrane) is suitably parted to allow
air to enter the plenum via the tiles/slates as required.
Installation and Maintenance Low Energy Positive Input Ventilation Unit
Approx position of 2
additional timber supports
nailed short side to rafters
between central rafters for
spigot. See figure 8.
Foil backed bubble
wrap insulation
(Part No. 19 554)
stapled to timber
supports and at end
of rafters.
Felt spacer (Part No. 11694)
1 at each lap and rafter spacing.
See figure 9.
Foam wedges top and bottom.
(Part No. 14 452)
inserted between rafters.
See figure 1 . for detail
at top of plenum.
1 mm
1 mm
1 mm
Felt
2 mm dia. insulated
ducting connected to unit.
Typical sensor location.
Timber support
nailed short side to
rafter across full
width of plenum area.
Timber support
nailed long side to
rafter across full
width of plenum area.
Timber support
nailed long side to
rafter across full
width of plenum area.
Timber support
nailed short side to
rafter across full
width of plenum area.
Figure 7. Section through plenum.
32 mm
Insulated
ducting to unit.
Insulated
ducting
fitted over
spigot and
sealed with
aluminium tape
Joint between
plenum material
and ducting sealed
with aluminium tape.
(Part No. 19 553).
Nuaire 2 mm
dia. spigot with
venturi (Part No. 11231).
Figure 8.
Figure 9.
Felt spacer.
15 mm min
Timber
support.
Insulation returned around
end and stapled to make
plenum as airtight as possible.
Foam wedge. Cut if required and
sandwich between rafters,
timber supports and
underside of felt, to make
as airtight a seal as
possible.
Figure 1 .
Note:
1. All insulation joints to be sealed using aluminium sealing tape.
2. Timber supports to be 50 x 25mm minimum size.
3. The sensor head with attached cable should be pushed through
the gap in felt adjacent to a centrally located spacer, to the under-
side of the tile. The cable can then be fed through the plenum
material, clipped to the roof structure and connected to the unit.
Fix duct to
spigot with
tape. Cut out hole in
plenum where
spigot can be located.
Timber support nailed
to rafters across full
width of plenum area.
Attach spigot (Part No. 11231)
to 2 small timber supports.
2 mm dia insulated
flexible ducting.
Foam wedges.
Foam wedges.
Foil backed bubble wrap
insulation returned around
end of rafters and stapled to
make plenum as airtight as
possible.
Figure 11. Plenum constructed under rafters.
4Leaflet Number 671346 October 2 6
Note regarding roofs with sarking between top of rafters and the roofing felt
(or breather membrane).
In these roofs, gaps in the sarking, 1 mm wide, centred on the felt laps and running
the full width of the plenum, are required to allow access for installation of the felt
spacers and free flow of air into the plenum.

.2 Via the loft space at high level through uninsulated ducting supplied by the installer
.3 Via the soffit through a grille and ducting supplied by the installer
Installation and Maintenance Low Energy Positive Input Ventilation Unit
Connected to
unit spigot using
dynotie connector.
Sensor
wired down
to unit
2 mm dia. uninsulated duct (min 1.5m extended)
secured to roof timber using large washer and
screw (supplied by installer) inside throat of duct.
Ideally the inlet to the duct should be
located approximately 6 mm down
from the highest point in the loft.
Note: the ducting may be turned
through 9 to obtain the minimum
1.5m extended length.
o
6 mm
Figure 12.
Figure 13. (See Figure 15 for sensor location).
2 mm dia. insulated ducting
connected to unit spigot using
dynotie connector. 15 mm dia. pipe
(Part No. GB25 -T2 ).
Insulated duct formed over pipe
and sealed with dynotie connector.
199 x 215 x 2 mm
white plastic wall grille
(Part No. FB25 ).
.4 Via a wall grille and ducting supplied by the installer
Figure 14. (See Figure 15 for sensor location).
Soffit grille (Part No. 51892 ) fixes over rectangular ducting
which has been pulled through rectangular hole (22 mm X 8 mm)
cut in soffit and folded flat up against the surface of the soffit.
Note that a minimum soffit width of 13 mm is required.
222mm x 9 mm flexible
PVC Rectangular ducting
(Part No. PVC933WH)
Note: this duct should
be left as short as possible.
Circular duct connector
(Part No. FDC2 ).
2 mm dia. insulated
ducting connected
to unit spigot using
dynotie connector.
Form end of rectangular
ducting to fit connector
and secure using
dynotie connector.
5Leaflet Number 671346 October 2 6

4th Sensor (home)
connection
3 Sensor
connections
1
1
2
2
3
3
4
PLENUM (A)
OUTSIDE (C)
LOFT (B)
9.0 Connecting the temperature
sensors to the main fan unit
Supplied with the unit are four black leads each incorporating a
temperature sensor which is sealed at one end.
The sensor end of the leads connected to connection 1, 2 and 3
(see figure 16) should be located as follows:-
i) Measuring the outside air temperature at the eaves.
(see figure 15).
ii) Any two of .1, .2 and .3 as required.
With the cable sensors installed as described above, attach the
other ends of the cables to the appropriate connector block on the
main unit.
Fit the fourth temperature sensor in a suitable location in the home.
Select a position unaffected directly by heating radiators or possible
draughts from opening windows. Using a small screwdriver, pierce
a hole in the corner of the ceiling and push the end of the sensor
through until it just protrudes into the room.
Connect the other end of the sensor cable to the fourth connector
block (Figure 16).
Figure 16.
Installation and Maintenance Low Energy Positive Input Ventilation Unit
To unit
spigot
2 mm dia. insulated ducting to unit
spigot with dynotie.
External sensor located on
most northerly (non-sunny)
side of roof.
Final duct connection detail to tile vents depends on
size and number of tile vent spigots.
Figure 15.
.5 Via roof tile vents by others and insulated ducting supplied by the installer
6Leaflet Number 671346 October 2 6
Ensure temperature sensor wires are connected to
their respective plugs adjacent to duct spigots.

Installation and Maintenance Low Energy Positive Input Ventilation Unit
10.0 Electrical Connection
Please note: the electrical connection of the unit must be be carried
out by a qualified electrician.
Electrical details:-
Voltage: 240V 1ph 50Hz
Consumption: 40W (max)
Fuse rating: 3 Amp
NOTE This unit must be earthed
The three core cable from the mains power supply should be
connected to a fixed wiring installation, via a fused isolator, in
accordance with current IEE wiring regulations.
11.0 User Control
The user control should be fitted to an appropriate wall (fixings
supplied). Position the control so that the user can gain easy access.
Instructions for fixing are supplied with the control.
Screw the backplate to the wall. Connect the cable (supplied) and
clip the control into place. Route the cable to the loft and connect
to the main unit control module panel (see figure 18).
Secure the cable to prevent accidental dislocation.
User Control Test
Ensure the power light is on green and the status light is either
green or amber.
If the power light is not on check the wiring and connections between
the fan unit and the user control.
DRI-ECOSMART/1
The user control as shown in figure 18 above, has a target
temperature setting dial knob and two press buttons (under the
flap) which enable the fan to be switched off or the airflow to be
boosted to its maximum duty.
DRI-ECOSMART/2
The user control is similar to the one shown above but excluding the
“on/off” and “boost/auto” switches. It has a target temperature
setting dial knob and provides automatic control of the airflow into
the dwelling.
Figure 18. Control module panel on unit (cover removed).
12.0 Airflow Adjustment on fan unit
The unit has six air volume (speed) settings. The setting switch is
located on the main control box on the fan case.
Figure 19. shows the LED’s that, when illuminated, indicate the
corresponding air volume for the unit.
For example, a one bedroom, one person bungalow would be
adjusted to the lowest setting (two LED’s on the left illuminated).
A five bedroom seven person detached house would need to be
set to the highest (all three LED’s illuminated).
With power connected the three LED’s will flash randomly for
appoximately 2 minutes and will then indicate the speed currently
set. To select another speed, simply continue to press the button
down until the required setting is shown.
Power Status
Power Status
User control
cover closed
User control
cover open
Speed selection
button
LED's indicate
speed (air volume)
L N
Key to speed
settings
23 V 1ph 5 Hz
supply
NET 1 NET 2 NET 3 NET 4
User control
connection
NICM
connection
(see separate
leaflet)
Figure 17.
7Leaflet Number 671346 October 2 6

14.0 Maintenance
The unit does not require any maintenance other than a filter change
and a check of electrical connections every 5 years. The status light
on the user control panel will flash red when a filter change is
required.
New filters can be purchased direct from Nuaire using the following
code: 4 718 (5 year filter).
If the status light is permanently red, or if the units performance has
been reduced dramatically and there is no flashing red light, please
contact our service department.
Dust can occassionally accumulate through static, on the diffuser
and the adjacent ceiling. This can be removed if required by
vacuuming.
Note: A clear distance of 500mm should be available above the
unit to allow access for maintenance.
15.0 Warranty
The units 5 year warranty starts from the day of delivery and
includes parts and labour.
16.0 Service Enquiries
Nuaire can assist you in all aspects of service. Our service
department will be happy to provide any assistance required,
initially by telephone and If necessary arrange for an engineer
to call.
Telephone [phone]
Technical or commercial considerations may, from time to time, make it necessary to alter the design, performance and
dimensions of equipment and the right is reserved to make such changes without prior notice.
Installation and Maintenance Low Energy Positive Input Ventilation Unit
42 96
33
80
13.0 Dimensions (in mm) and weights
8Leaflet Number 671346 October 2 6
Figure 19. Diffuser.
29
3 5 2 dia.
62
33 8
25
Figure 2 . Main fan unit
Power Status
163
75
3
Figure 21. User control.
Main fan unit
weight 21 kg.