ENG
1. Cooling unit application
The
EGO
series cooling units described in this manual
are designed and built to cool the air inside electrical
switchboards in order to protect components sensitive
to thermal shock. They also provide IP54 ingress
protection against contaminating and aggressive/
corrosive substances.
1.1 Intended use
The
EGO
cooling unit must be used:
- For cooling electrical switchboards
- Within the temperature and voltage-supply limits
indicated on the data plate (
F.06, pos. 5
) of the
cooling unit and also given in table
F.14
of this
manual
- Away from any sources of heat or hot air
- In an environment with adequate air exchange
- On switchboards with IP54 rating or higher. If
these requirements are not respected, excessive
condensation build-up may occur.
As a consequence, cable entry points or any other
openings in the cabinet should be well sealed.
To ensure correct operation, the specified scheduled
maintenance operations (see section
10
) must be
performed regularly. Incorrect or careless use may
cause irreparable damage to the cooling unit and
may lead to hazardous situations.
1.2 Improper use
The
EGO
cooling unit must NOT be used:
- Under any condition except those described in
section
1.1
- Outdoors, with excessive concentration of solid
contaminants and/or aggressive chemical
contaminants
- With the doors of the electrical switchboard open,
or installed on enclosures without a minimum IP 54
rating, due to excessive condensate formation
- With the temperature set below the dew point of
the ambient air
- In explosive atmospheres, or those with aggres-
sive chemicals or high concentrations of dust or oil
suspended in the air
- In potentially inflammable atmospheres
- Exposed to the elements
- With the condensate line closed or blocked off, or
in any case in which the condensate is not allowed
to run off freely
- Without the front panel
- With the cooling unit intake and outlet air flows
obstructed by walls or objects that are too close To
this end, check the minimum distances as regards
the external air flow (figure
F.02
), and make sure
there are no obstructions caused by the switchbo-
ard components as regards the internal air flow.
2. Supply
Inside the packaging you will find:
1
Cooling unit
1
Electronic thermostat
1
Installation, operation and maintenance manual
1
CE conformity certificate
1
Test certificate
1
A4 drilling template (
F.06, p.4
)
1
Installation kit containing (
F.06
):
- Flanged nuts (
p.1
)
- Flat washers (
p.2
)
- Grub screws (
p.3
)
2
Connectors, one for the power supply and one
for the signals (
F.5
)
1
Self-adhesive sealing strip (
F.06, p.4
)
1
Flexible hose for condensate drainage
12x2x100 mm (
F.10
)
Lifting eyebolts (
F.03
)
3. Updates
ORELL Tec AG
reserves the right to update its
products and the corresponding manuals based
on techni-cal progress without prior notice. Please
note that at the time of sale, this manual and the
correspon-ding product may not be considered
inadequate only because they are not subject to
the above-mentioned updates.
4. Technical features
(figures
F. 14
and
F. 15
)
The unit’s technical features and CE marking are
given on the data plate attached to the cooling unit.
5. Transport and handling
During transport and storage the cooling unit must
be kept in a vertical position, as indicated on the
packaging (figure
F.01
), and must not be exposed
to temperatures above 70°C or below -20°C. Upon
receipt, check that the packaging has not been
damaged during shipping.
To lift the cooling unit in a safe manner the two
supplied M6 eyebolts may be used; these should
be fitted into the threaded inserts located on the
top of the cooling unit (figure
F.03
).
6. Installation
Installation of the unit should only be performed
by qualified and authorised personnel.
The cooling unit must be installed with the enclosure
air intake hole in the highest possible point.
Ensure the fixing elements and couplings will not
interfere with the equipment inside the enclosure
itself.
If the cooling unit is to be installed on a door,
make sure the door can take the weight.
The unit must be installed in the vertical position
indicated. Maximum permitted deviation from the
vertical is 2°.
Disconnect power before starting any work inside
the switchboard. The cooling unit must be instal-
led on the outside of the electrical switchboard.
If semi-recessed installation is required (fig.
F.06
),
the corresponding accessory must be used. This
is available upon request as an optional extra.
Depending on the installation option, drill the ho-
les and make the necessary cuts in the switchbo-
ard (figure
F.06
) using the drilling template
supplied with the unit. Fit the sealing strip on the
cooling unit on the side connected to the enclosu-
re and follow the assembly diagram (figure
F.06
).
7. Condensate discharge hose
The condensate which, depending on the ambient
temperature and humidity conditions, forms on
the heat exchanger which cools the enclosure air,
is not a malfunction but a normal phenomenon of
the cooling unit. In models
EGO04-EGO06
, this
condensate is taken outside through a hose at the
bottom of the cooling unit. The transparent plastic
hose, supplied with the unit, must be connected
to this outlet (figure
F.10
). This plastic hose can be
connected to another one with the same diameter
to carry the condensate to another point, allowing
it to be discharged where there can be no slipping
hazard for personnel. In this case, make sure the
condensate flows without any hindrance. Avoid
horizontal lengths of more than 0.5 metres, uphill
sections and the accidental formation of traps
(figure
F.07
). The end of the condensate discharge
hose must always be free and not underwater, so
never place the end of the discharge hose inside a
condensate collection container (figure
F.08
).
Models
EGO08
to
EGO40
are fitted with a conden-
sate evaporation device which operates via the hot
(outlet) tube of the compressor (Fig.
F.13
). These
models nevertheless have an emergency condensa-
te outlet which can be carried outside as described
above. If the cooling unit is used with the doors of
the enclosure open, excessive quantities of conden-
sate will form and this is an unauthorised condition
of use (figure
F.09
). We suggest using a position
switch on the door connected to the cooling unit’s
digital input to stop the unit if the door is opened.
(See section
8.3
)
8. Electrical connection
8.1 Safety
Warning! Electrical connections must only
be performed by specialised and authorised
personnel. Switch power off to the enclosure
before making the connection.
Check that there
is no power to the switchboard and that the supply
voltage corresponds to the characteristics given on
the cooling unit’s data plate. The power supply must
be protected using appropriate time-delay fuses
(type T) or circuit breakers with K-curve, per the
indications given in table
F.14
. Connect the power-
supply cables to the black connector included with
the unit, following the indications given in figure
F.04
. Disconnect the cooling unit before performing
testing on the enclosure.
8.2 Two-phase models with autotransformer
(EGO06G / EGO08G / EGO10G / EGO12G /E-
GO16G)
These two-phase models can operate with two
different supply voltages: 440V 2~50-60Hz and
400V 2~50-60Hz. If the available power supply
is 440V 2~50-60Hz, connect terminals L1(0) and
L3(440) on the terminal board (figure
F. 04
). If,
on the other hand, the available supply voltage
is 400V 2~50-60Hz, connect terminals L1(0) and
L2(400) on the same terminal board.
8.3 Alarm pins
(figure
F.05
)
All input/output signals from the electronic control
unit are managed via the grey pin:
- Alarm signals from the electronic control unit can
be taken from terminals 1 and 2
- A digital input for voltage free contacts is availa-
ble on terminals 3 and 4
The cooling unit’s electronic control unit is pro-
grammed to generate an alarm when the digital
input is open. When the digital input is not being
used, it is therefore necessary to bridge it by con-
necting terminals 3 and 4 of the grey pin together
with a cable.
9. First start up and adjustment
If, prior to installation, the cooling unit was left in
an incorrect position (figure
F.1
), wait at least 8
hours before switching it on. Otherwise, 30 minu-
tes is more than enough time for the oil to
return to the compressor, after which the cooling
unit can be powered up. The enclosure air intake
fan starts working immediately, making the tem-
perature inside the enclosure even. If this tempe-
rature exceeds 2K above the set point, both the
compressor and external air fan will turn on, cau-
sing the cooling cycle to start. This then stop-
s when the inside temperature reaches the set
point. The thermostat is factoryset to 35°C. The
set point can be set to between 20°C and 50°C. In
order to save energy and minimise the production
of condensate, it is nevertheless recommended it
not be set below 30 °C.
9.1 Electronic thermostat
9.1.1 Setting the set point
The cooling unit is fitted with a TX050 electronic
thermostat. See the specific manual C17000199
included with the unit for the functions of this
thermostat and how to program it.
ORELL Tec AG
shall be in no way held liable for
any alterations the customer may make to the
default parameters if they have not received
authorisation to do so.
5
