SECOP DES.I.800.A2.MULTI Instructions

ENGLISH
GENERAL INFORMATION
For a correct and safe utilization of the equip-
ment, it is mandatory to comply with the require-
ments contained in this user guide, which con-
tains instructions and information about:
• Installation method
• Use of the apparatus
• Maintenance
• Dismantling, recycling and disposal
The use of the condensing unit for different op-
erations or the use of a different refrigerant gas
from the stated ones may cause damages to
people or the condensing unit itself and are there-
fore considered to be improper uses for which the
Manufacturer shall not be held responsible. The
Manufacturer is not liable for damages resulting
from failures to observe the warnings and instruc-
tion contained in this manual.
REFRIGERANT CONNECTIONS
To make a refrigerant connection, contemplate
the suction and discharge piping according to the
most adequate pipe diameter to ensure a correct
gas velocity, or contact the manufacturer's ser-
vice.
SUCTION LINE INSULATION
Insulate the suction piping with anti-condensation
pipe. If the evaporating temperature is lower than
10 °C the suction lines must be insulated with an
anti-condensation pipe of at least 13 mm thick-
ness, to limit the heating.
OIL RETURN
All the systems must be designed to ensure, any-
how, the return of the oil to the compressor. If the
condensing unit is placed above the evaporator
it is important to contemplate siphons on suction
line every 2 m difference in height, to guarantee
the return of the oil to the compressor. Anyhow
when some horizontal parts are present, it is im-
portant that the suction piping has a 3 % slope
to the compressor. In the majority of installations
where all piping don't exceed 10 meters, it is not
necessary to add oil. Where piping is oversized
from the normal conditions, or are longer than 10
m, a small amount of oil shall be added.
INTENDED USE
The condensing unit has been designed and
manufactured exclusively for commercial refriger-
ation in permanent establishment. The condens-
ing unit has not been designed and manufactured
for household refrigeration appliances. The con-
densing unit cannot be installed in areas where
there is a potentially explosive atmosphere. The
condensing unit has not been designed and built
to be installed outside. The condensing unit has
not been designed and built to be installed in ag-
gressive, humid or dusty environment.
February 2022
Instructions
Condensing Units
INSTALLATION
Installation, maintenance and commissioning
must be carried out by qualified specialists only.
All connections, i.e. soldering and flare joints, are
to be made professionally. Protect the surround-
ings against admittance of unauthorized persons.
Pay attention to sufficient ventilation. Remove
transport safety devices if any. Mount the con-
densing unit horizontally. Prevent any vibration.
Avoid smoking and open fire.
CONDENSING UNIT ASSEMBLY
Prepare the tube connections from the evapora-
tors. Use only dry components to avoid moisture
entering the system.
VACUUMING
Vacuuming must be carried out after the complete
connection to the refrigerating system. Plan suf-
ficient time to vacuuming as it takes place from
the low pressure side only, unless additional mea-
sures were taken to speed up the evacuation.
ELECTRICAL WIRING
Prepare the electrical wiring while vacuuming is in
place. Do not start the compressor until a vacuum
break has been carried out. Remove the cover
over the terminal board. Connect the leads. It is
forbidden to start the unit without a thermostat
being connected between line and compressor.
Keep flammable materials away from electric
equipment.
REFRIGERANT GAS CHARGE
When a vacuum of 0,5bar or lower is reached,
close the connections to the vacuum pump.
Repeat the vacuum process once or twice if
needed. Refrigerant should always be charged
in liquid state from the discharge valve, to avoid
liquid hammer when the unit is started. If this rule
cannot be followed, the compressor must not be
started until refrigerant pressure and temperature
are equalized. Refer to the unit label for the refrig-
erant gas to be used.
LEAK DETECTION
Perform leak detection on brazing with adequate
methods and equipment for the gas in use.
MAXIMUM REFRIGERANT CHARGE
It is recommended to use only the correct refrig-
erant quantity for the correct functionality of the
refrigerant system. For system with capillary pipe
the charge must be adapted to satisfy the system
kind. The working charge must never exceed the
maximum capacity of the condenser and receiver.
COLD START
After unit installation or long shut-off periods, the
compressor must be allowed to reach a tempera-
ture higher than 15° C before being started. This
will prevent possible problems on starting due to
too high oil viscosity.
DES.I.800.A2.MULTI
CHECKING THE WINDING PROTECTOR
In the event of a compressor failure a check must
be made by resistance measurement direct on
the current lead-in to find out whether the fault is
due to motor damage or simply a winding protec-
tor trip. If the resistance measure show continuity
up to the protector but not after it, this means that
the protector cut out. Wait for the protector to re-
set, it may takes up to. 45 min.
STORAGE
It is recommended to adequately protect the con-
densing unit and to store it in a suitable environ-
ment, repaired from weathering, with good ven-
tilation, between -20 °C and +50 °C in a dry and
not dusty room.
IMPORTANT SERVICE AND SAFETY TIPS
The filter dryer must always be replaced when the
system is opened. Blow nitrogen or dry air through
the system before brazing. When a faulty system
is emptied, the refrigerant must be collected with-
out mixing it with other refrigerants, and must not
be leaked in the environment. See also "installa-
tion". The condenser and the full condensing unit
must be cleaned with regularity, observing speci-
fied maintenance and cleaning plans. Working on
components under pressure is dangerous. Pay
attention to the hot and extremely cold parts. Pay
attention to parts in movement (as motorfans).
Pay attention to sufficient ventilation. Check the
perfect functionality of the fans. The application
limits set by the Manufacturer must be respected.
If pressure control systems are indicated, these
must be installed professionally. Working condi-
tions must be monitored to ensure the perfect
operation. Check that the valves (suction and dis-
charge side) are fully open. If forced ventilation is
necessary, this must be shown (i.e. with a label).
MAINTENANCE
Register on the plant maintenance book, accord-
ing to the timings set by laws, controls for gas
leaks, refrigerant flow, oil level, noise from com-
pressor and motorfan, Checking for abnormal vi-
brations and ticking.
DISASSEMBLY
Isolate the unit from the electrical supply and pro-
ceed to follow on reverse order the installation
procedure.
DISMANTLING, RECYCLING AND DISPOSAL
At the end of unit lifecycle , proceed to separate
and store the parts with environment impact, sep-
arating parts that may be cause of pollution and
separate material earmarking them to separate
disposal. Refrigerant gas must not be leaked in
the environment but must be recovered by quali-
fied operators. Compressor oil is subject to sepa-
rate collection, so dispose the unit on specialized
disposal centers following regulations in force.
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