S&P CAD HE 450 H BASIC Manual De Instrucciones página 23

2. TECHNICAL INFORMATION 2. TECHNICAL INFORMATION
2.1 2.1 General information General information
Extraction of stale air and supply of fresh air in public/private premises with heat Extraction of stale air and supply of fresh air in public/private premises with heat
recovery by a counter flow aluminium heat exchanger. Condensation forms during the recovery by a counter flow aluminium heat exchanger. Condensation forms during the
heat exchange process is recovered in the condensate tray, which must be connected heat exchange process is recovered in the condensate tray, which must be connected
to a waste water drain. The CAD HE 450 H has a 100% heat exchanger bypass to a waste water drain. The CAD HE 450 H has a 100% heat exchanger bypass
system which allows free cooling by night. The principle of free-cooling uses free system which allows free cooling by night. The principle of free-cooling uses free
energy from the outdoor air to ventilate and cool buildings when outdoor air energy from the outdoor air to ventilate and cool buildings when outdoor air
temperature is lower than the exhaust air temperature, during the night in summer for temperature is lower than the exhaust air temperature, during the night in summer for
example. The system operates automatically or can be used manually. example. The system operates automatically or can be used manually.
2.2 2.2 Description Description
Outdoor air (ODA): Outdoor air (ODA):
Install the fresh air intake (wall or roof) at a sufficient distance from any area of Install the fresh air intake (wall or roof) at a sufficient distance from any area of
high pollution (trees, exhaust fumes, road, etc). high pollution (trees, exhaust fumes, road, etc).
This duct must be sealed and insulated to prevent condensation. This duct must be sealed and insulated to prevent condensation.
Supply air (SUP): Supply air (SUP):
To avoid thermal losses and optimize the performance of the installation, it is To avoid thermal losses and optimize the performance of the installation, it is
recommended to use insulated ducts. recommended to use insulated ducts.
Extract air (ETA): Extract air (ETA):
To avoid thermal losses and optimise the performance of the installation, it is To avoid thermal losses and optimise the performance of the installation, it is
recommended to use insulated ducts. recommended to use insulated ducts.
Exhaust air (EHA): Exhaust air (EHA):
This duct must be sealed and insulated to prevent condensation. This duct must be sealed and insulated to prevent condensation.
By-pass: By-pass:
The CAD HE 450 H has a 100% heat exchanger bypass system which allows free The CAD HE 450 H has a 100% heat exchanger bypass system which allows free
cooling by night. The principle of free-cooling uses free energy from the outdoor cooling by night. The principle of free-cooling uses free energy from the outdoor
air to ventilate and cool buildings when outdoor air temperature is lower than the air to ventilate and cool buildings when outdoor air temperature is lower than the
exhaust air temperature. exhaust air temperature.
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