Ariston NUOS 200 EXT Instructions D'utilisation page 58

Heat pump water heater – TECHNICAL INFORMATION FOR INSTALLERS
water heater is intended to function by externally (or through another room) expelling or intaking the air processed by
the heat pump, pipes specifically designed for the passage of air may be used. Make sure that the pipes are securely
connected and fixed to the product so as to avoid any accidental detachments (for example, use suitable silicone).
Only in the event of ducting may the outlet air covers be exchanged, should you wish to use the outlet located on the
upper part. Do not in any way manipulate or break the air intake/exhaust grilles.
WARNING: Do not use outdoor grills resulting in high losses, such as anti-insect grilles.
The grids used should allow good air flow, the distance between the inlet and outlet air should not be less
than 50cm.
Protect pipes from the external wind. The expulsion of air in the chimney is allowed only if the draft is
appropriate, is also required periodic maintenance of the barrel, and chimney accessories.
The total static pressure loss due to installation is calculated by adding the loss of the single installed
components; this sum must be lower than the static pressure of the fan which is equal to (70 Pa).
See diagram on the last page.
WARNING! A type of canalization not suitable affects product performance and significantly
increases the heating time!
only if ducted
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