Intended Use; Improper Use; Supply; Updates - PAVARINI COMPONENTS TEXA MIX Série Notice De Montage Et D'entretien

ENG
1. Heat exchanger application
The MIX series heat exchangers described in
this manual are designed and built to cool the
air inside electrical switchboards in order to
protect components sensitive to thermal shock
when the external temperature is lower than
the internal temperature. They also provide
IP54 ingress protection against contaminating
and aggressive substances..

1.1 Intended use

The MIX heat exchanger must be used:
- For cooling electrical switchboards
- Within the temperature and voltage-sup-
ply limits indicated on the data plate (F.07,
pos. 2) of the heat exchanger and also gi-
ven in table F.08 of this manual
- With ambient (external) temperatures lo-
wer than those inside the electrical switch-
board and in any case lower than the maxi-
mum temperature specified in the technical
specifications
- Away from any sources of heat or hot air
- In an environment with adequate air ex-
change
- On switchboards with IP54 rating or hi-
gher, and which are completely free of dust
and/or other contaminants
To ensure correct operation, the specified
scheduled maintenance operations (see
section 9) must be performed regularly. In-
correct or careless use may cause irrepa-
rable damage to the heat exchanger and
may lead to hazardous situations.

1.2 Improper use

The MIX heat exchanger must NOT be
used:
- Under any condition except those descri-
bed in section 1.1
- Outdoors, with excessive concentration of
solid contaminants and/or aggressive che-
mical contaminants
- With the doors of the electrical switchboard
open (figure F.04), or installed on enclosu-
res without a minimum IP54 rating
- In explosive atmospheres, or those with
aggressive chemicals or high concentra-
tions of dust or oil suspended in the air
- In potentially inflammable atmospheres
- Exposed to the elements
- Without the front panel
- With the intake and outlet air flows obstruc-
ted 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.

2. Supply

Inside the packaging you will find:
1 Heat exchanger
1 Installation, operation and maintenance
Manual
1 CE conformity certificate
1 Test certificate
1 A4 drilling template
1 Installation kit containing (F.01):
- M6 Screws (p.1)
- Screws (p.3)
1 Self-adhesive sealing strip (F.01, p.4)
1 Lifting eyebolt (F.07, p.1)
2 Louvered vents (F.01, p.2)

3. Updates

Pavarini Components reserves the right to
update its products and the corresponding
manuals based on technical progress wi-
thout prior notice. Please note that at the
time of sale, this manual and the corre-
sponding product may not be considered
inadequate merely because they are not
subject to the above-mentioned updates.

4. Technical features

(figures F. 08 and F. 09)
The unit's technical features and CE marking
are given on the data plate attached to the
heat exchanger.

5. Transport and handling

The packaged heat exchanger 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 heat exchanger in a safe man-
ner, the supplied M6 eyebolt may be used;
this should be fitted into the threaded insert
located on the top of the heat exchanger
(figure F.07, p.1).

6. Assembly

Before performing any work inside the
switchboard, disconnect the power sup-
ply. The heat exchanger's flexibility (figure
F.01) allows it to be mounted either inside
or outside the electrical switchboard enclo-
sure.
According to the type of assembly chosen,
make the necessary holes and cuts on the
switchboard enclosure using the drilling
template supplied with the heat exchang-
er. Fit the sealing strip on the side of the
heat exchanger connected to the electrical
switchboard enclosure and fasten as illus-
trated in the diagram (figure F.01).
If installing inside the switchboard enclo-
sure, change the position of the power ca-
ble exit as shown in the diagram (figure
F.03), switching the position of the plastic
plug with that of the cable gland.
Ensure that the fasteners and couplings
do not come into contact with the equip-
ment contained inside the switchboard en-
closure. For better performance, install the
6
heat exchanger as high up as possible.

7. Electrical connection

7.1 Safety

Warning! Electrical connections must on-
ly be performed by specialised and autho-
rised personnel. Switch off power to the
enclosure before making the connection.
Check that there is no power to the switch-
board and that the supply voltage correspon-
ds to the characteristics given on the heat ex-
changer's data plate. The power supply must
be protected using appropriate time-delay fu-
ses (type T) or circuit breakers per the indica-
tions given in table F.08. Connect the cables
following the indications given in the wiring
diagram, ensuring you have correctly identi-
fied all wires.
8. Regulation thermostat for external
fan (optional)
The thermostat is a mechanical model with
a gas-filled bulb positioned at the enclosure
air intake point. It measures and controls
the temperature, enabling and disabling
the external fan as necessary.
The thermostat is factory-set to 35°C; if you
wish to change the setpoint you must use a
screwdriver to adjust the thermostat pin, af-
ter cutting off the power supply to the heat
exchanger and removing the panel.
The thermostat set point can be adjusted
to between 20°C and 46°C (F.07, p.3). For
temperatures outside this range, contact
our technical department.
The thermostat has a hysteresis of 4°C,
therefore the fan will start at a tempera-
ture around 4°C higher than that at which
it stopped. After adjustment, replace the
panel and restore the power supply.

9. Maintenance

Caution! Before embarking on any
maintenance work, switch off the power
to the enclosure. The only work required
concerns cleaning the exchanger ambient
coil (figure F.05) and periodical checks, as
explained below:
Job
Checking and cleaning the
ambient-side coil
Checking the fans for
overheating or excessive
vibration
To clean the coil: remove the front cas-
ing, take the coil out and remove dry dust
with compressed air (pressure should be
no more than 4 bar), then clean off grease
and oil with suitable detergents, compati-
ble with PVC, PE, PP and silicone. Last-
ly, dry thoroughly and reassemble. Any re-
pairs that may be required must only be
performed by specialised and authorised
personnel.
Frequency
Every 2
months
Every 6
months