Required Ambient Conditions; Disposal - Danfoss VACON NX Commissioning And Maintenance Manual

2 0 VACON I NTRODUCTI ON
4.3.2 Requir ed ambient conditions
The HX-unit is designed to work within ambient temperatures between +5...+50C. It is the customer
and/or end- it during
operation. The HX-unit is not built to withstand rain, sand- or snowstorms. If the HX-unit is
positioned outside it must be placed inside a cubicle that is equipped with temperature and humidity
control.
There is no condensation allowed in the main drive. As the primary circuit piping is located inside the
the dew-point temperature. The primary circuit temperature is set accordingly to ambient
temperature and relative humidity. The most secure way of preventing condensation inside the main
drives is to keep the water temperature in the primary circuit higher than the ambient temperature.
If the temperature in the drive room is higher than the temperature of the liquid in the primary
circuit piping it can, depending on the relative humidity of the air, cause condensation on the piping
as well as inside the drive.
A dew-point chart can be used to optimize the primary circuit minimum temperature. It is
recommended that the primary circuit temperature is higher than the ambient temperature but in
some cases this will cause an unnecessary reduction of load in the main drive. If this is the case the
maximum relative humidity (RH) at the installation must be specified. When the maximum RH and
the maximum ambient temperature have been determined, the Dew-Point Chart found in chapter
5.3.6, Temperature set points can be used to define the minimum primary circuit temperature.
4.4

DISPOSAL

The HX-unit disposal must be done only at selective waste collection authorised centres, according
to the local codes and standards.
Metal to metal waste
Electrical equipment to electrical waste
Glycol and corrosion inhibitors: Check national or local ecological directives for information on how
to dispose of the drained liquid.
Local contacts: http:/ / dr ives.danfoss.com/ danfoss- dr ives/ local - contacts/
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