SystemAir VR 250 ECH/B, Руководство по установке

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VR 250 ECH/B
Installation description
206609 (17-09-2010)
7
Systemair AB
GB
Ducting
General
Air to and from the unit is led through a duct system. To ensure long life and satisfactory cleaning
possibilities, ducts made of galvanised steel (Spiro) are highly recommended.
Short pieces (max. 1 m) of flexible aluminium ducting can be used for connection between the unit and
roof unit/wall grill.
To obtain high efficiency, low energy consumption and the required airflow the duct system should be
commissioned for low air speeds and a low pressure drop. Female duct connectors, Ø125 mm, ensure
flexible and space saving duct connections. If extra long lengths of discharge and/or fresh air duct is
required, e.g. through naboring apartment, duct dimension should be increased to Ø160 mm in the shaft
and all through to the roof unit/outdoor grill.
NOTE!

If the VR 250 ECH/B is not connected to a cooker hood, the connector on the unit must be
plugged

Do not connect tumble dryer to the ventilation system. Use separate duct from the dryer to
outside

Duct connections/duct ends should be covered during storage and installation

Grill for discharge/roof unit must also be installed according to building regulations in force.
Duct connections
Secure all joints between ducting and Tee-pieces, duct connectors, reducers etc. by means of special
tape or 3 pieces self-drilling screws per joint. "Telescopic joint" on Villavent Zoom duct must be taped
(fig.4) .
Silencers
To avoid fan noise being transferred to rooms, install sound attenuators (pos.1, fig.5 ) on connectors for
inlet air and extract air on the unit. (L = 1,0 m). Not from cooker hood.
To avoid noise being transferred between rooms via the duct system and also to reduce noise from the
duct system itself, installation of sound attenuators before every inlet diffuser is recommended.
Flexible ducting
Use only flexible ducting ( pos. 2, fig. 5) for connections between the unit and roof unit/grill for outdoor air
intake.
Condensation/heat insulation
Outdoor air duct and discharge ducts must always be well insulated against condensation (fig.6) . Correct
insulation installation on ducts connected to the unit is especially important. All ducting installed in cold
rooms/areas must be well insulated. Use insulating covering (minimum 100 mm mineral wool) with plastic
diffusion barrier. In areas with extremely low outdoor temperatures during the winter, additional insulation
must be installed. Total insulation thickness must be at least 150 mm.
NOTE! If the unit is installed in a cold place make sure that all joints are covered with insulation,
and
tape well.