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2.3 Ducts
Install the ventilation duct system according to the
ventilation drawings. To prevent the propagation of
sound, do not install the ducts directly against structural
building elements.
Insulate the ventilation ducts in order to reduce
heating or cooling, sound and to prevent water from
condensing on surfaces. Use fire protection insulation
for the ducts according to national regulations. Cold
ducts must be insulated carefully without gaps in
the insulation, so that moisture cannot condense.
The thickness of the insulation must be adequate
depending on insulation material, climate zone and
according to the local regulations. Most manufacturers
of insulation material offer calculation programs for the
calculation of sufficient and correct insulation.
The supply air duct should be fitted with acoustic
insulation along the stretch between the unit duct
outlet and the sound attenuator, so that fan sound will
not be propagated out into the room.
In general, ventilation ducts should be insulated in the
following manner:
• Insulate outdoor air ducts run through warm spaces.
• Exhaust air ducts should always be insulated in
accordance with national regulations.
• Insulate supply air ducts in cold spaces.
• Insulate extract air ducts in cold spaces.
• If the air inside the duct is colder than in the sur-
roundings; the insulation should be protected by a
vapour barrier.
It is important to preserve the tightness of the vapour
barrier at the duct penetration collars.
2.4 Electric and control cables
An earthed power supply cable with mains plug is fitted
to the ventilation. The power cable plug serves as the
ventilation unit's main switch and it should be connect-
ed to an electric socket at an easily accessible spot.
On top of the ventilation unit are modular cable for control
of the unit. The maximum connected length of the modu-
lar cable in the system is 40 metres. If the modular cable is
installed within some building element, a ∅ 20 mm conduit
should be used, allowing a possible later change of cabling.
When installing the unit, make sure to provide adequate
access to the cable connectors, e.g. for servicing and
adjusting the unit.
Any accessories are either connected to the ventilation
unit's four-way connector (2 optional functions) or to
the external connection modules (3 optional functions).
Cables are routed via the lead-through openings in and
on top of the ventilation unit. The connection of any
accessories is described in the section "External connec-
tions". Cables to connection modules and accessories
are not included in the delivery.
A. Cable entry for any accessories
B. Terminal blocks for connection of accessories
!
Only a qualified electrician is allowed to
make electrical installations in accordance
with national regulations.
2020-11-12
R9-H | R15-H Smart
A
B
Important
All rights to changes reserved.
!
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