Intended Use; Improper Use - OLAER DEK Manual De Montaje Y Servicio

1. Cooling unit application
The DEK 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 DEK cooling unit must be used:
- For cooling electrical switchboards
- For roof installation
- Within the temperature and voltage-supply limits
indicated on the data plate 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 DEK 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 switch-
board components as regards the internal air flow.
2. Supply
Inside the packaging you will find:
1 Cooling unit
1 Electronic thermostat manual
1 Installation, operation and maintenance manual
1 CE conformity certificate
1 Test certificate
1 A4 drilling template
1 Installation kit containing (F.04):
- 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.07)
1 Self-adhesive sealing strip (F.04, p.4)
1 Transparent hose pipe for service condensate
runoff 12x2x2500 mm (F.05, p.5)
1 coloured hose pipe for emergency condensate
runoff 12x2x1500 mm (F.05, p.6)
2 condensate runoff pipe elbow joints (F.05, p.7)
Lifting eyebolts (F.03)
3. Updates
OLAER 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.
OLAER (Schweiz) AG, Bonnstrasse 3, CH – 3186 Düdingen, Tel 026 492 70 00, Fax 026 492 70 70, info@olaerschweiz.ch, www.olaer.ch
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.
Ensure the fixing elements and couplings will not
interfere with the equipment inside the enclosure
itself.
Make sure the roof of the switchboard is able to
withstand its weight. If necessary, reinforce the
switchboard structure.
The unit must be installed in the horizontal
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.
Drill the holes and make the necessary cuts in the
switchboard (figure F.04) using the drilling templa-
te supplied with the unit. If required fit the sealing
strip on the cooling unit on the side connected to
the enclosure and follow the assembly diagram
(figure F.04).
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.
The condensate is conveyed outwards by means
of two runoffs, an emergency one and a service
one, located in the bottom part of the cooling unit.
A piece of transparent plastic hose pipe, 2.5 m
long, must be connected to the service runoff.
This is included in the supply (figure F.05, p.5).
Cut the piece so it covers the distance from the
fitting as far as the edge of the switchboard roof.
Couple the piece to the elbow joint included in
the supply. Couple the other side of such elbow to
the remaining part of the pipe, which conveys the
condensate as far as the base of the switchboard.
Connect a piece of coloured plastic hose pipe,
1.5 m long, to the emergency runoff. This is
included in the supply (figure F.05, p.6). Cut the
piece so it covers the distance from the fitting
to the edge of the switchboard roof. Couple the
piece to the second elbow joint included in the
supply. Couple the other side of such elbow to the
remaining part of the coloured pipe which conveys
the condensate to the side of the switchboard.
Make sure the flow of condensate is not hindered
in any way.
Avoid horizontal lengths of more than 0.5 metres,
uphill sections and the accidental formation of
traps (figure F.08). The end of the condensate
discharge hose must always be free and not
underwater. Never place the end of the discharge
hose inside a condensate collection container
(figure F.09). A position switch is best used on the
door which, when connected to the digital input of
the cooling unit, stops the operation of such unit
in case of door opening.
5
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.07. Disconnect the cooling unit before performing
testing on the enclosure.
8.2 Two-phase models with autotransformer
( DEK08G / DEK12G / DEK15G )
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.06). 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.07)
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
available on terminals 3 and 4
The cooling unit's electronic control unit is
programmed 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 connecting 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.01), wait at least
8 hours before switching it on. Otherwise, 30 mi-
nutes 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
temperature inside the enclosure even. If this
temperature exceeds 2K above the set point, both
the compressor and external air fan will turn on,
causing the cooling cycle to start. This then
stops when the inside temperature reaches the
set point. The thermostat is factory-set 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.
OLAER 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.
ENG