User manual

5 Installation
EN
20 Rittal enclosure cooling unit
– The hose must be laid with an adequate and constant
gradient to prevent siphoning.
– The hose must be laid without any kinks.
– If extended, the cross-section of the hose must not be
reduced.
– The hose should be routed to a drain or external con-
densate water evaporator by the customer.
Fig. 33: Connection for condensate water discharge hose
Key
1 Connection point
2 Hole in enclosure for hose
 Connect a suitable hose to the condensate water dis-
charge nozzle and secure using a hose clip.
 Lay the hose as per the instructions above.
5.4 Electrical connection
5.4.1 Notes on electrical installation
 When carrying out the electrical installation, it is impor-
tant to observe all valid national and regional regula-
tions as well as the provisions of the responsible
power supply company.
– Electrical installation must only be carried out by a
qualified electrician who is responsible for compliance
with the existing standards and regulations.
– The mains infeed and the signal cable must be of a
shielded design. The shielding can be connected to
the earth lug provided in the connection area of the
mains connector.
– All cables routed into the wiring compartment have to
be insulated for the maximum voltage of the power
supply.
Connection data
– The connected voltage and frequency must corre-
spond to the ranges stated on the rating plate. The
units support multiple voltages.
– The cooling unit must be connected to the mains via
an all-pole disconnect to overvoltage category III (IEC
61058-1).
– No additional temperature control may be connected
upstream of the unit at the supply end
– Install a pre-fuse to match the supply voltage used and
the specific electrical output of the cooling unit. The
rated values may be taken from section 10 "Technical
specifications" below.
– Low-noise potential equalisation must be guaranteed
with the mains connection.
– In order to prevent EMC interference, the unit should
be incorporated into the existing potential equalisation
system with a larger cable cross-section (10 mm²).
Overvoltage protection and supply line load
– The unit does not have its own overvoltage protection.
Measures must be taken at the supply end by the
switchgear manufacturer or operator to ensure effec-
tive protection against lightning and overvoltage. The
limits specified in standard UL/IEC/EN 60335-2-40
must be observed.
– The units are classified as overvoltage category III. The
mains voltage must not deviate by more than the tol-
erance specified in section 10 "Technical specifica-
tions".
– The discharge current may exceed 3.5 mA.
– The units are high-voltage tested ex works. An addi-
tional high voltage test must only be carried out with a
DC voltage supply source (1500 VDC max.).
Three-phase devices
– There is no need to observe a counterclockwise or
clockwise phase rotation when making the electrical
connection for inverter devices in the three-phase ver-
sion. The electronics incorporated into the devices au-
tomatically create the required phase rotation.
– In three-phase devices, the absence of a phase is de-
tected, and the device is switched off.
– Outgoing equipment is monitored by the inverter, and
deactivated in the event of a malfunction in the elec-
tricity supply.
Door limit switch
– Each door limit switch can only be assigned to one
cooling unit.
– Several door limit switches may be operated in parallel
with one cooling unit.
– The minimum cross-section for the connection cable
is 0.3 mm² for a cable length of 2 m.
– The line resistance to the door limit switch must not
exceed a maximum of 50 Ω.
– The maximum admissible line length is 10 m.
– The door limit switch only supports a floating connec-
tion; no external voltages.
– The contact of the door limit switch must be closed
when the door is open.
– The safety extra-low voltage for the door limit switch is
provided by the internal power pack: Current approx.
5mA DC.
 Connect the door limit switch to terminals 5 and 6 of
the signal connector.