49
18.01._5280107_02
NRL 0280-0750 °-L / A-E
EN
- contact the company if changes must be made to the refrigerant,
hydraulic or electric diagram of the unit, as well as its control logic
PREVENTION OF CHEMICAL / FIRE / ENVIRONMENTAL RISKS
- Any intervention on the machine must be performed with “NO SMOK
-
ING”
- non disperdere mai in ambiente i fluidi contenuti nel circuito frigorifero
- The water circuit may contain harmful substances. Prevent the
contents coming into contact with skin, eyes and clothing. Use the
prescribed personal protective equipment. (chemical risk);
- If there is a need to perform a braze-welding, so with the use of special
torch with naked flame, the same flame must only be activated if in
the absence of freon gas in the environment and on the cooling circuit
pipes. Inside piping must be “washed” and contain nitrogen type inert
gas. The presence of flame and freon gas decomposes the same, form
-
ing lethal and carcinogenic compounds.
- Hot works require the availability of a Carbon Dioxide (CO
2
) fire ex
-
tinguisher. DO NOT USE WATER, leachates could be hazardous for the
discharges; if using water, provide a containment tank.
PREVENTION AGAINST RESIDUAL RISKS DUE TO PRESSURE OR HIGH/
LOW TEMPERATURE
- The unit contains under pressure gas: no operation must be performed
on under pressure equipment except during maintenance that must be
carried out by competent and authorised personnel;
- Perform brazing or welding only on empty pipes and clear of any
lubricating oil residues; do not near flames or other heat sources to the
pipes containing under pressure fluids;
- Do not work with naked flames near the unit;
- Do not bend or hit pipes containing under pressure fluids;
- The unit is equipped with overpressure release devices (safety valve): if
these devices intervene, the refrigerant gas is released at high temper-
ature and speed;
- The machine and the pipes have very hot or very cold surfaces that
lead to risk of burns by contact;
- Do not use your hands to control any refrigerant leaks;
- Before removing elements along the under pressure hydronic circuits,
shut-off the pipe section involved and gradually drain the fluid until its
pressure and that of the atmosphere are balanced.
PREVENTION AGAINST RESIDUAL ELECTRICAL RISKS
- Before opening the electrical panel, disconnect the unit from the
mains by means of the external isolator;
- Wait the time indicated on the machine plate from when the power
supply was disconnected from the unit before accessing inside the
electrical panel;
- If the unit is equipped with integrated inverter type compressors, dis-
connect the power supply and wait at least 5 minutes before accessing
for maintenance: the internal components remain live for this time,
generating the risk of electrocution.
CLEANING THE MACHINE
The machine must be turned off and electrically disconnected when being
cleaned.
INSPECTION AND CONTROL
The machine must be turned off and electrically disconnected during its
inspection and leak check.
ROUTINE AND EXTRAORDINARY MAINTENANCE
The machine must be turned off and electrically disconnected during its
maintenance (with possible replacement of components). In particular:
- Before any intervention, isolate the unit from the mains by means of
the external isolator provided for the insertion of padlocks (up to 3) for
blocking in ‘’open’’ position
Place a sign reading ‘’Do not turn on – maintenance in progress’’ on the
open isolator;
- Equip yourself with tools in good condition and make sure to have fully
understood the instructions before using them;
- Equip yourself with the appropriate personal protective equipment as
indicated in paragraph 1 of this report;
- For outdoor units, do not perform interventions in dangerous weather
conditions such as rain, snow, fog, thunderstorms, etc;
- The cooling circuit components must be replaced after draining the
refrigerant gas contained in the circuit;
- During venting protect yourself against any leakage of fluids at danger
-
ous temperatures and/or pressures;
- Always use appropriate equipment (extractor, antistatic bracelet etc)
when replacing electronic boards;
- If replacing a motor, compressor, evaporator, condensing coil or any
other heavy element, make sure that the lifting devices are compatible
with the weight to be handled;
- In air units with independent compressor compartment, do not access
the fan compartment without having first disconnected the machine
through the isolator on the board and having placed a sign reading ‘’Do
not turn on – maintenance in progress’’ ;
- Always and only use original spare parts purchased directly from
Aermec or from official dealers. Contact Aermec should it be necessary
to move the unit one year after its positioning on-site or it must be
dismantled;
- It is not permitted to change the refrigerant, hydraulic or electric layout
of the unit, or its control logic unless expressly authorised by Aermec;
- The machine must be loaded with the refrigerant in the feature label
and in the required quantity;
- Make sure to have removed all tools, electrical cables or other loose
object and having perfectly connected the machine to the system
before closing it and starting it;
- The inspections and measurements necessary to establish the correct
functioning of the machine to be run with the machine in operation,
must be performed with the machine closed (framework fixed on the
machine), reading the measurements collected by the control board
and viewable in the control panel of the same. In the case of machines
with cooling circuit compartment open, stand in front of the control
panel of the electrical panel remaining distant and not exposed to the
under pressure parts of the cooling circuit
ATTENTION
When having to take measurements with the machine on and the electri-
cal panel and cooling circuit open, be careful since the machine is live, the
cooling circuit contains high pressure gas, the pipes may be hot or cold,
some parts may be in motion.
Any absorption measurements of the compressors, compressor casings,
pumps and fans as well as the power supply measurements, must be taken
as follows:
- With machine off, access its panel;
- Connect the measuring instruments such as current clamps (to
measure the current) and multimeters (to measure the voltage). These
instruments must be fitted with appropriate terminals/clamps that
allow to remotely control the measurement;
- Access the machine and read the measurements made by the instru-
ments, keeping AWAY from live electrical parts;
- As soon as the measurements are taken, turn off the machine, remove
the instruments and close the electrical panel.
The measurements of the compressor inlet and outlet temperature and
pressure to determine the overheating and subcooling of the machine,
must be carried out as follows:
The measurements of the compressor inlet and outlet temperature and
pressure to determine the overheating and subcooling of the machine,
must be carried out as follows:
- With machine off, access its cooling circuit;
