Unit Design - Danfoss Vent Installation And Maintenance Instructions Manual

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Unit design

Use
The Vent heat recovery unit is used for transporting air according to ELSÄK-FS 1999:5-Group B, i.e. not for transporting flammable and
explosive substances, grinding dust, and similar. When ventilating residential buildings, Vent transfers the energy found in the extracted
air to heat transfer fluid in a heat pump therefore increasing the heat pump's heating factor.
Casing
The Vent heat recovery unit is made up of dual galvanized plates with intermediate condensation and sound insulation. The outer casing
is available in steel plate and powder-coated versions.
Filter
The unit is equipped with a non-washable G80 filter to protect the fan and the heat recovery coil from blockages. A filter sensor indicates
when the filter must be inspected. Use a vacuum cleaner to clean the filter. We recommend replacing the filter once a year.
Heat recovery unit
The hot extracted air passes a water coil and transfers its heat to the water that comes from the ground or rock collector etc. The trans-
ferred energy supplies the cold side of the heat pump and therefore increases the heat factor of the heat pump.
Fan
The Vent heat recovery unit has a fan of the EC-type with forward angled blades, which gives 50 – 60% lower energy consumption com-
pared to conventional fans.
Circulation pump
Vent has an integrated circulation pump.
Control system
Vent's control equipment is located on the front of the unit. The control unit regulates the fan capacity from 20 - 99%, continuous control
of the circulation pump, pump stop during defrost and indicates when the filter needs inspecting.
Connections
The duct connections of the Vent heat recovery unit are 160 mm in size with the extracted air to the right and the exhaust air to the left,
seen from the front of the unit.
2 – Vent – 086L0874 rev. 3