TEXA NXT04, Инструкция по установке, эксплуатации и обслуживанию

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8
ENG
1 General Information
WARNING
Read the following instructions carefully
before installing and using the product.
1.1 Overview
The product is manufactured by TEXA
INDUSTRIES S.r.l. in compliance with applicable
EC directives; more specifically, it complies with
the requirements of the Machinery Directive
2006/42/EC and applicable harmonised and
safety regulations pursuant to the same directive.
1.2 Purpose of the Manual
This manual contains all information for safe
installation, use and maintenance of the product.
1.3 Symbols Contained in this Manual
WARNING
Indicates that failure to comply with these
instructions can lead to serious or even fatal
personal injury.
CAUTION
Indicates that failure to comply with these
instructions can lead to less serious injury or
damage to the product.
NOTICE
Indicates information which is important for use of
the machine.
1.4 Retention of Documents
This manual, in combination with the rest of the
digital/hardcopy documentation, represents an
integral part of the product.
Ensure this documentation is available for
consultation by all persons who use the product
and personnel authorised to carry out maintenance
operations.
NOTICE
Store the documentation with care in a clean, dry
location until the product has been disposed of.
1.5. Updates
TEXA INDUSTRIES S.r.l. reserves the right
to update its products and the corresponding
manuals based on technical progress without prior
notice. Please note that at the time of sale, this
manual and the corresponding product may not be
considered inadequate only because they are not
subject to the above-mentioned progress.
1.6. Technical Features
The technical features and CE marking are given
on the data plate attached to the machine.
The product is supplied with safety instruction
manual, wiring diagram, specific test report and
CE declaration of conformity.
1.7. Cooling Unit Application
The NXT 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 IP55 protection level against the infiltration
of contaminating and aggressive/corrosive
substances.
1.7.1 Intended Use
Use the NXT cooling unit:
- For cooling electrical switchboards
- Within the temperature limits and with the supply
voltages specified on the rating plate ( F.04, pos.
5 ) applied to the cooling unit, and in table F.13 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 enclosure should be well sealed.
- So that the compressor always remains upright.
1.7.2 Misuse
WARNING
Incorrect or careless use may cause irreparable
damage to the cooling unit and may lead to
hazardous situations.
Do not use the NXT cooling unit:
- Under any condition except those described in
section 1.7.1
- In explosion-risk atmospheres, or those with
aggressive chemicals or excessive concentrations
of dust, solid contaminants, chemicals or oil
suspended in the air
- Exposed to the elements, strong radiated heat
sources or strong magnetic fields
- With the doors of the electrical switchboard open,
or installed on enclosures without a minimum IP54
rating, due to excessive condensate formation
- With the temperature set below the dew point of
the ambient air
- 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
switchboard components as regards the internal
air flow.
- In a position other than that for which it was
designed, installed neither on moving, oscillating
nor vibrating parts
NOTICE
The product warranty shall automatically be
rendered void if it is not used under the conditions
laid out above, and in the event of any tampering by
the customer. TEXA INDUSTRIES S.r.l. shall bear
no liability in the event of faults or malfunctions due
to failure to comply with the instructions provided.
NOTICE
To ensure correct operation, the specified
scheduled maintenance operations (see section
9
) must be performed regularly.
2. Technical Information
2.1 Operating Principles
The cooling unit for electrical switchboard
enclosures works on the basis of a refrigeration
circuit consisting of four main components:
compressor, evaporator, condenser and
expansion device (figure F.12 ). The refrigeration
circuit is sealed and contains R134a refrigerant,
which is chlorine free and ozone friendly. The
unit is divided into two hermetically separated
sections where the ambient air and enclosure air
do not come into contact with one another and
are treated separately. The compressor (CP)
compresses the refrigerant, taking it to a high
pressure and high temperature. The compressor
then pushes the refrigerant through a heat-
exchanger coil, called the condenser (C), where it
is cooled by ambient air, thus passing from the gas
to the liquid state. In the liquid state it then passes
through the expansion valve (EXP), vaporising at
the outlet as it is now at a much lower pressure. It
is then received by the heat exchanger coil, called
the evaporator (E), by means of which it absorbs
heat from the enclosure air and passes from a
liquid state to gas. The enclosure is cooled down
in this manner. The gaseous refrigerant is then
drawn back into the compressor and this cycle is
repeated.
2.2 Safety Devices
WARNING
DO NOT disable the safety devices; any such
modification, in addition to causing a hazard,
would immediately invalidate the product
warranty.
The refrigeration circuit is fitted with an EN 12263
compliant high-pressure safety switch P (figure
F.12 ) set to the maximum working pressure of
the cooling unit. If this threshold is exceeded, the
pressure switch cuts out the compressor, before
restoring it automatically. The fans and compressor
have an (internal or external) thermal cut-out
switch that stops them in the case of overheating.
3. Supply
Inside the packaging you will find:
1 Cooling unit
1 Safety instruction manual
1 CE conformity certificate
1
Test certificate
1 A4 drilling template
1 Wiring diagram
1 Installation kit containing ( F.04 ):
- Flanged nuts ( 1 )
- Flat washers ( 2 )
- Grub screws ( 3 )
2
Connectors, one for the power supply (
F.04
) and
one for the signals ( F.05 )
1 Self-adhesive sealing strip ( F.04, 4 )
1 Hose barb for the condensate discharge ( F.10,
1 )
Transport/handling eyebolts from NXT12 to
NXT60 ( F.03 )
4. Transport and handling
WARNING
Ensure the following operations are performed
by qualified and authorised personnel,
equipped with appropriate PPE.
WARNING
Do not exceed the maximum manual handling
weight for loads specified by law. Use lifting
equipment as required.
CAUTION
Dispose of the packaging materials in an
environmentally friendly manner.
On receipt, check that the packaging does not
show signs of damage from transport. Once the
packaging has been removed, make sure the
product shows no signs of dents or damage and
that no oil is leaking from the circuit.
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. To lift
the cooling unit in a safe manner use the supplied
eyebolts (included from NXT12); these should be
fitted into the threaded inserts located on the top of
the cooling unit (figure
F.03
).