Rittal enclosure cooling unit
21
5 Installation
EN
– The hose should be routed to a drain or external con-
densate water evaporator by the customer.
Fig. 42:
Connection for condensate water discharge hose
Key
1
Connection point
2
Cable tie
3
Condensate hose
Connect a suitable hose to the condensate discharge
and secure with a cable tie.
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.
– All cables have to be insulated for the maximum volt-
age 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).
– The unit is intrinsically safe and does not require any
additional external safety devices for safe operation.
– The connection cable must be protected with a minia-
ture circuit-breaker.
– To ensure the proper functioning of internal presso-
stats in the event of a malfunction, a line fuse of no less
than 15 A is required.
– If a motor circuit-breaker or circuit-breaker is used, it
should be selected in accordance with EN 60898-1
(tripping characteristic type D).
– For applications in UL-approved facilities, any CCMR-
type fuse from Littelfuse may be used, or alternatively,
a UL-certified air circuit-breaker.
– Suitable miniature circuit-breakers and circuit-break-
ers can be found under Rittal accessories (see sec-
tion 10 "Technical specifications" and section 13 "Ac-
cessories").
– Thanks to the integral inverter technology, convention-
al start-up currents (start-up of internal motors) are not
externally visible.
– The mains infeed and the signal cable may optionally
be of a shielded design. The cable shield may be con-
tacted at the potential equalisation point.
– No additional temperature control may be connected
upstream of the unit at the supply end
Overvoltage protection and supply line load
Rittal recommends the following measures for protect-
ing the cooling units in non-standard environmental and
connection conditions.
– 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 units are classified as overvoltage category III and
meet the requirements of standard EN 60204-1 on the
electrical equipment of machines. The mains voltage
must not deviate by more than the tolerance specified
in section 10 "Technical specifications".
– 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.).
– EMC interference signals arising in local industry and
plant networks may deviate significantly from those
specified in the standards. In these types of network
situations, an external EMC filter should be used.
– If the combined output of the frequency converters,
power converters or transformers in the network
where the device is being operated is >70 kVA, the
customer must connect a Class II surge voltage pro-
tector in the mains supply line upstream of the cooling
unit. The surge voltage protector must be designed to
EN 61800 -1. The following values may be assumed
as starting-points for the design:
Technical specifications for a suitable overvoltage pro-
tection module:
2
3
1
Transformers,
power electronics
Assumed discharge
energy
70 kVA…100 kVA
40 J
100 kVA…200 kVA
80 J
200 kVA…400 kVA
160 J
400 kVA…800 kVA
320 J
Tab. 3:
Design of the surge voltage protector
