Fagor DDS APS-24, Hardware Manual

Page: 268 / 406

   Installation
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DDS
HARDWARE
Cabinet heat dissipation
The following should be used to cool the electrical cabinet:
 Heat exchangers. They prevent contaminated air (mist, metallic dust in
suspension, etc.) from getting into the electrical cabinet hence
eliminating the chances of accumulating particles, condensation, etc. in
the cooling circuits of the DDS system modules.
If it is impossible to use heat exchangers, then:
 Air extraction system. They prevent the air from entering the electrical
cabinet with a fan.
 Place the extractor fan at the top of the cabinet and the air intake at the
bottom. See previous figure.
 To have a filter in the air input. The fan should also have a filter.
 Decrease the air intake speed from the outside by making the air input
window larger than that of the fan. The required power and air flow
depends on the power installed.
 Install the DDS system as far away as possible from air inputs and
outputs.
 Carry out periodic maintenance on air filters.
Use the following suggestions to minimize the maintenance of this type of
cooling systems and the contamination of the electrical cabinet:
 Set the fan to work only when the inside temperature of the electrical
cabinet exceeds the predetermined limit (for example 45°C). This will
decrease its running time and the flow of the incoming air while
increasing the lifespan of the fan. The cost of this solution is minimal
using a bimetal type thermostat or controlling it by using one of the
outputs of the PLC or CNC.
 Install a fan whose speed varies depending on the air temperature. This
type of fans have an NTC sensor either integrated into it or supplied as
an accessory by the fan manufacturer.
MANDATORY. The ventilation for the electrical cabinet must be enough to
dissipate the heat generated by all the devices and components working
inside.
F. H8/6
Location of the air intake and output in the electrical cabinet
A. Fan. Air output. It is recommended to install a filter.
B. Air input. It is mandatory to install a filter.
A
B