Rittal SK 3273.xxx, Assembly And Operating Instructions Manual

5 Commissioning

Rittal cooling unit assembly and operating instructions

15

EN

4.7 Finalising assembly

4.7.1 Installing the filter media

The cooling unit condenser is finished all over with a 
dirt-repelling, easy-to-clean RiNano coating. In many 
cases, therefore, the use of filter media is unneces-
sary, particularly in the case of dry dusts.
For dry, coarse dust and lint in the enclosure air, we 
recommend installing an additional PU foam filter 
mat (available as an accessory) in the cooling unit. 
For air containing oil condensation, we recommend 
the use of metal filters (also available as an accesso-
ry). When used in textile plants with heavy lint con-
tamination, lint screens should be used (available as 
an optional extra).
• Pull the louvred air inlet grille from the enclosure.
• Insert the filter mat into the louvred grille as shown 

in Fig. 16 and push it back onto the enclosure.

Fig. 16:

Install the filter mat

4.7.2 Fitting the cooling unit

• Connect the connector to the rear of the display.
• Place the louvred grille onto the unit at the front, 

and press it down until you hear it snap into place.

Fig. 17:

Connect the display and attach the louvred grille

4.7.3 Setting the filter mat monitor 

Function of the filter mat monitor:
Dirt on the filter mat is automatically detected by 
measuring the temperature difference in the external 
circuit of the cooling unit

(see “6.1.6 Programming 

overview”, page 19). As the level of filter mat soiling 
rises, the temperature difference will increase. The 
nominal value of the temperature difference in the 
external circuit adapts automatically to the relevant 
operating points in the performance diagrams. 
Hence there is no need to readjust the nominal value 
for different operating points of the cooling unit.

5

Commissioning

• Once all the assembly and installation work is com-

plete, switch on the power supply to the cooling 
unit.

The cooling unit starts running:
– First the software version of the controller appears 

for approx. 2 sec., followed by “ECO” for activated 
eco-mode. Then the enclosure internal tempera-
ture appears on the 7-segment display.

You can now make your individual settings on the 
unit, e.g. set the temperature or assign the network 
identifier, etc. (refer to the “Operation” chapter).

Caution! Risk of damage!
The oil must collect in the compressor 
in order to ensure effective lubrication 
and cooling.
Do not operate the cooling unit for 
at least 30 min. after assembling the 
equipment.