3 Product description
EN
18 Rittal roof-mounted Blue e+ cooling unit/VX25 Blue e+ integration solution
low the admissible pressure, the unit will automatically
resume operation.
– Temperature monitoring prevents the evaporator coil
from icing over. If there is a risk of icing, the compres-
sor switches itself off and automatically switches itself
back on again at higher temperatures.
– The compressor is monitored and protected by the in-
verter to prevent overloading.
– The fans have a built-in overload protection with auto-
matic reset.
– In order to allow a reduction of pressure inside the
compressor and hence a safe restart, once it has been
switched off (e.g. upon reaching the set temperature
via the door limit switch function or via de-energising),
the device will switch back on with a delay of 180 sec-
onds.
– The device has floating contacts on the connection
pins on terminals 1 and 3 of the signal connector (X2),
via which system messages from the device may be
polled, e.g. using a PLC (2 x normally closed or nor-
mally open contacts).
3.1.5 Condensation
At high levels of humidity and low temperatures inside
the enclosure, condensate water may form on the evap-
orator coil.
The cooling module of the integration solution possess-
es an automatic, electrical condensate water evapora-
tion. The thermal component used for this purpose is
based on self-regulating PTC technology. Condensate
water arising on the evaporator coil is collected in a tank
in the external circuit of the cooling unit, and partially
evaporated via the airflow. When the water level rises,
the water enters the PTC thermal component and is
evaporated (through-flow heater principle). The water
vapour streams out of the cooling unit with the airflow
from the external fan.
The PTC thermal component is activated automatically
when the compressor is running, and continues to run
for around 15 minutes after the compressor has been
switched off. During the after-run phase, the condenser
fan will likewise continue to run at low speed.
In the event of a short-circuit in the PTC component or if
there is a risk of inverter overload (possible at high ambi-
ent temperatures), the PTC component will be deacti-
vated. This means that any condensate water arising
can be discharged via the safety overflow.
If the fuse has tripped, any condensate water is drained
off via the safety overflow. The condensate water is dis-
charged at the bottom from the condensate water evap-
orator with an overflow pipe. The condensate hose in-
cluded with the scope of supply must be connected to
the condensate water nozzles at this overflow pipe. (see
section5.3.4 "Connect the condensate water dis-
charge").
3.1.6 Filter mats
The entire cooling unit condenser is covered with a dirt-
repelling, easy-to-clean RiNano coating. A pleated filter
is also installed in the cooling unit. This pleated filter
must be installed to achieve IP 54 degree of protection.
Depending on the incidence of dust, you will need to re-
place the pleated filter regularly (see section8 "Inspec-
tion and maintenance").
3.1.7 Door limit switch
The cooling unit may be operated with a floating door
limit switch connected. The door limit switch is available
as accessory from Rittal.
The door limit switch function causes the fans and the
compressor in the cooling unit to gradually slow down
and then switch off after approximately 15 seconds
when the enclosure door is opened (contacts 5 and 6
closed). This prevents the formation of condensate wa-
ter inside the enclosure while the enclosure door is
open. In order to prevent damage to the unit, it is
equipped with an ON delay: The evaporator fan will cut
in again after a delay of a few seconds on closure of the
door.
Please note that no external voltage may be applied to
the door contacts (connection clamps 5 and 6).
3.2 Proper use, foreseeable misuse
The cooling unit is intended exclusively for cooling
closed control cabinets as well as for professional use in
accordance with DIN EN 61000-3-2. The VX25 Blue e+
integration solution is envisaged only for the installation
of switchgear components and their cooling in the per-
mitted operating temperature range as well as for pro-
fessional use in accordance with DIN EN 61000-3-2.
Any other use is not permitted.
– The unit must not be installed and operated in loca-
tions which are accessible to the general public (see
DIN EN 60335-2-40, paragraph 3.119).
– The unit is designed solely for stationary use.
Note:
For the roof-mounted cooling unit, the auto-
matic, electrical condensate water evapora-
tion is not installed as standard, but available
as accessory.
Note:
Operation without the pleated filter is not
permitted! Use only original accessories
(3285.700).
Note:
The door limit switch is installed in the enclo-
sure and wired with the cooling module as
standard for the integration solution.