Unovent h-line User manual

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Dwelling
Moisture
Management
Installation Guide for Unovent®h-line™
system, including the Unobrain®install-
and-forget, fully automated controller.
These guidelines have the
purpose of helping the
experienced and inexperienced
manage the task of installing the
Unovent®h-line™system for
rooms with no roof cavity above
including the fully automatic,
install-and-forget Unobrain®for managing the system when
the outside source air temperature and/or humidity makes this
resource unsuitable for short periods.
Please read this entire document thoroughly before
commencing the installation.
For the cable supplied, it is essential that the cable core
marked red or white is always fitted to the plug and
socket connectors marked with a red stripe.
All product and component photos within this guide are for
illustrative purposes only and colours, shapes and
components used in the supplied product may change at any
time but retain the same or improved functionality of the items
illustrated. Version H180917

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1. Installation of Unovent®h-line™system for rooms with no
roof cavity requires a degree of skill and experience to
ensure no damage is done to existing wall framing and
electrical power cables. It is the responsibility of the
installer and the home owner to ensure correct
procedures are followed when installing any through-the-
wall device and to ensure that the finished installation
does not allow the ingress of water into the external wall
structures. If uncertain about the critical requirements
when installing devices which penetrate external walls, do
not attempt such work until that uncertainty is removed.
Alternatively, utilise the services of a qualified trades
person who understands the requirements to prevent
ingress of water into the external wall structures.
(Unovent Limited does not take any responsibility for the
finished water tightness or otherwise for the installation.)
2. Decide where you plan to install the outer wall mounted
Unovent®room outlets in each room selected. These
should be living spaces, such as bedrooms, lounges,
family rooms and dining rooms.
3. The first stage of this planning is to simply decide on the
preferred locations where the 240mm holes are to be cut
in the wall lining for mounting the Unovent®room outlets.
Do not actually start cutting holes at this point –that will
be described later in this instruction.
4. For the bedrooms, lounge rooms, family rooms and dining
rooms, select the position on the wall near the window
and the ceiling where you expect the hole to be cut to take
the Unovent®room outlet.

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5. These ideal or planned positions should be written into a
note pad to avoid confusion but translated and noted as
distances from the edge of the window or similar. This is
because the final positions of Unovent®room outlets
must be determined by next checking both inside the
room and outside of the house at the outer cladding for
positions which will not interfere with wall framing. A stud
finder could prove useful in determining positions clear of
timber framing.
6. When all locations have been determined, with a high
degree of confidence, an extra length drill could be used
to drill a centre position through both the internal lining
and the external cladding (if the latter is timber or fibrous
plaster). In the case of a brick veneer external cladding,
the same approach could be taken with an extra-long
masonry drill to create a hole through the brick cladding
which will be the centre point of the Unovent®room
outlet.
7. Be mindful of ensuring that any timber framing is avoided
when determining the centre points for the Unovent®
room outlets and check carefully that no existing electrical
power cables will be cut during this and subsequent
installation steps.
8. The hole cut size diameter for the internal lining of the
room for the Unovent®room outlets is 240 mm (120 mm
radius). If the external cladding is timber or fibrous
plaster, it is likely that the overall wall thickness will be
approximately 140 mm. This means that the hole in the
outer cladding will need to allow for a diameter of 170 mm
(85 mm radius) to take the fan housing section of the
Unovent®room outlet. If the external cladding is brick, it

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is likely that the overall wall
thickness will be
approximately 250 mm,
which includes the 50 mm
cavity between the brick
and the wall framing. This
means that the hole in the
outer brick cladding will
need to allow for a diameter of 110 mm (55 mm radius) to
take the inlet tube section of the Unovent®room outlet.
9. The Unovent®h-line™room outlets are supplied with an
inlet tube section which is cut to length to suit the overall
wall thickness (from the internal lining visible face through
to the face of the external cladding). For thinner overall
wall thicknesses, this inlet tube section should not be cut
to less than 25 mm from the edge of the plastic weld
connecting this inlet tube section to the fan housing.
10. When all the holes have been cut in the walls for each
room, lengths of the cable supplied should be placed from
one hole to the next hole, then from that second hole to
the third and so on, all ends loosely hanging inside the
rooms but placed along the shortest path so as not to
waste the cable. These ends will ultimately be connected
to the Unovent®room outlets utilising the plugs on the
Unovent®room outlets and the sockets supplied for the
cables. Finally a run of cable should be placed from the
nearest cut hole (with 300mm to 400mm hanging out of
the hole) to the place where the Unobrain®will be located
outside under the eave or on the ceiling of an entrance
porch or doorway. This is to ensure that the Unobrain®
can sense the condition of the outside air to then leave the
system running or to switch it off when the air outside is

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too hot in the summer, too cold in the winter or too moist
anytime when we get prolonged periods of rain. From the
Unobrain®there is a cable connection to the plugin power
supply (more on the Unobrain®in items 12 and 19).
11. From the living space areas, the supplied socket
connectors (supplied as part of the Unovent®room
outlets) should be connected to the cable ends hanging
through the Unovent®room outlet holes, ensuring that the
cable with the red or white marking is always connected to
the socket marked with the red stripe (this is the 12 volt
positive connection). The other unmarked cable has its
cable ends connected to the unmarked socket. Where
there are two cable pairs hanging out of the Unovent®
room outlet hole, both pairs are connected into the socket
using these colour matches. Where there are three cable
pairs hanging out of the Unovent®room outlet hole (one
of these cable ends belonging to the cable going to the
Unobrain®), all three pairs are connected into the socket
using these colour matches.
12. At the end of the cable which has been run to where the
Unobrain®will be located, the pair of ends are to be
connected to the plug connector packaged with the
Unobrain®. The pair of ends on the cable going to the
plugin power supply location are to be connected to the

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socket connector, packaged with the Unobrain®, where
the Unobrain®will be located. At the other end of this
cable, at the plugin power supply location, the pair of
cable ends are to be connected to the plug connector
packaged with the plugin power supply. The Unobrain®
is connected in series with the 12 volt supply from the
plugin power supply with this plug and socket
arrangement before the Unobrain®cable socket outlet is
then to be connected to the first room outlet.
13. A 240 volt switched outlet is
required for the plugin
power supply to be plugged
into. This switched 240 volt
outlet can be located in
inside a cupboard or on a
wall in a convenient place.
If you require a 240 volt switched outlet to be installed,
consult your local electrician. It is recommended that the
240 volt switched outlet and plugin power supply be
placed inside a cupboard or somewhere out of sight, with
the 12 volt output cable going to the Unobrain®.
14. Initially, set the switch on the
power supply to 12 volts
using the key supplied. Next,
plug the power supply into
the 240 volt switched outlet,
turn the power on then fit the
Unovent®room outlets into
position one by one.
15. Before placing each Unovent®room outlet into its final
position, connect the cable connected socket onto the

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Unovent®plug and check that the fan runs. (If the fan
does not run, a cable connection has been incorrectly
done –each connection must consistently be red or white
marked cables to red marked sockets.)
16. If the fan runs on the
Unovent®room outlet, it is
now ready to be put in place
with its spring loaded clamps.
Put the clamps in the position
as shown in the photo to the
right, place edge of the
bottom part of the four clamps against the edge of the
hole by equal amounts (about 5mm overlap each also
ensuring that the plug+socket assembly is upper most to
ensure that inlet tube is pointing slightly downwards to
assist water drainage) then in one quick movement of the
whole room outlet, while maintaining a square-on
alignment, push the Unovent®room outlet into the wall.
This will cause the clamps to flip over and pull the
surround edge up against the face of the wall lining. After
about 3 days, the voltage setting can be set at 9 volts or
7.5 volts to reduce air flow but reset to a higher voltage if
the air flow proves insufficient for the reduction of
condensation on windows in the winter.
17. After final positioning of the Unovent®room outlet and
certainty that it is all working correctly, take steps to
waterproof and fill the spaces around the outer part of the
Unovent®room outlet and the external house cladding to
fully ensure that there will be no water ingress into the
external wall structure. The external cowl can then be
fixed to the inlet tube section of the Unovent®room outlet

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with PVC glue or small stainless screws, the latter making
it easier to remove at any time in the future.
18. Steps 15. to 17. are repeated for all Unovent®room
outlets.
19. The supplied Unobrain®fully
automated install-and-forget
controller (refer also to step
12) is to be installed outside
under the eave or on the
ceiling of an entrance porch
or doorway facing downwards
not more than approximately 5 metres from where the 12
volt plugin power supply is located. Alternatively, the
Unobrain®is to be mounted with its logo label in a
horizontal readable position if it is to be mounted on a
vertical surface. The Unobrain®is mounted utilising the
two screws supplied. The purpose of the Unobrain®is to
switch off the system for short periods when the outside
air temperature is too high (in the summer) or too low (in
the winter) or when the humidity is too high (which can
happen when there have been prolonged periods of rain
and at these times when the humidity of the outside air will
reach 100%).
20. When the Unobrain®is first powered on, the green light
flashes a number of times to indicate the software version
then goes through a 10 second start-up check over which
time the green light glows continuously. While it goes
through this check, any room outlets connected will run.
When it has successfully completed the start-up check, it
goes into “room outlets on” mode (green light flashes
quickly) or it goes into “room outlets off” mode (green

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light flashes slowly). In “room outlets on” mode, this
means that the roof cavity air is below the high
temperature set point AND above the low temperature set
point AND below the high humidity set point and the room
outlets remain running. In the “room outlets off” mode,
this means that the roof cavity air is above the high
temperature set point OR below the low temperature set
point OR above the high humidity set point and the room
outlets stop running.
21. Filter washing
maintenance is carried
out every 12 months.
Filters are accessed from
within the living space by
screwing the Unovent®
room outlet centre cone
fully out in an anti-
clockwise direction until it disconnects from the fixed part
of the Unovent®room outlet. The filter cloth is sitting on a
mesh platform and is carefully lifted off for washing by
hand in warn soapy water. It can be placed back on the
mesh platform immediately after washing and then the
centre cone can be screwed clockwise back into position
ensuring that it aligns correctly with the fixed part of the
Unovent®room outlet. It is screwed back until the cone
no longer turns easily, which is when a tubular spacer
holding the mesh platform in place prevents further turning
and the face of the cone is approximately flush with the
outer flange face of the fixed part of the Unovent®room
outlet. Do not over tighten to prevent stripping of the
plastic thread in the fixed part of the Unovent®room
outlet. Alternatively, filters can be replaced by ordering
online from Unovent Limited

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22. In the cooler months through autumn, winter and spring,
the Unovent®system can be kept running 24/7 and the
Unobrain®will switch the system off for short periods
when the outside air temperature is too cold. In situations
when the Unovent®system is running and the general
living space temperature is on the cool side, it is advisable
to consider effective heating being activated to counter
this. This can include inexpensive low wattage flat panel
heaters in the hall and bedrooms controlled by timers
integrated into the flat panel heaters.
23. In the warm summer months, not known for condensation
issues but a time when moisture is being introduced into
the living spaces by the people living in the house, it is
advisable to leave the Unovent®system switched on 24/7
and the Unobrain®will switch the system off to reduce
any unnecessary rise of the inside living area temperature
due to higher temperature of the outside air.
For further support, please contact:
Unovent Limited
19 Trugood Drive
East Tamaki
Auckland 2013
p: [phone]
a/h: [phone]
m: [phone]
[e-mail] © Unovent Limited 2015
www.unovent.nz Document Version H180917