48
18.01._5280107_02
NRL 0280-0750 °-L / A-E
EN
ATTENTION
Any cleaning, inspection, control, routine and extraordinary maintenance
must be performed by experienced, authorised personnel and qualified to
perform the above tasks. These tasks must be performed to perfection as
prescribed by M.D. 37/2008.
During the execution of
- Risks of electric discharges;
- Risk of injuries due to the presence of rotating parts;
- Risk of injuries due to the presence of sharp edges and heavy weights;
- Risks of injuries due to the presence of components containing high
pressure gas;
- Risks of injuries due to high or low temperature components.
- Noise-related risks of the machine functioning;
- Risks related to the presence of harmful substances in hydronic cir-
cuits.
These tasks must be performed using the appropriate personal protective
equipment, see figure below
Maintenance operations are essential to maintain the refrigerant unit
efficient, from a purely functional point of view and with regard to energy
and safety.
In the absence of specific regulations regarding HFO refrigerants, the man
-
ufacturer prescribes the application of and compliance with that indicated
in the:
- Regulation (EC) No.842/2006- art.3 concerning the “leakage contain
-
ment”
- Regulation (EC) No.1516/2007 concerning the “standard leakage
checking requirements” and related national laws implementing the
above European regulations.
ATTENTION
For the unit, the user must provide a system booklet which he must
ensure, or its designee authorised to service the machine, will contain all
required records in order to have a historical documentation of the unit
functioning. The absence of records in the booklet may count as evidence
of lack of maintenance
PRECAUTIONS TO BE OBSERVED DURING MAINTENANCE
ATTENTION
Maintenance operations can only be performed by authorised techni
-
cians.
PRECAUTIONS AGAINST RESIDUAL RISKS
MECHANICAL RISKS
- Before opening a machine panel, ascertain whether it is or not firmly
connected to it by hinges;
- In case a piece is disassembled, make sure it is correctly reassembled
before restarting the unit;
- Louvers of the heat exchangers, edges of the components and panels,
screws can generate cuts;
- Do not remove the protections from mobile elements while the unit is
running;
- Make sure that the protections of mobile elements are correctly in
place before restarting the unit;
- It is not permitted to walk or place other bodies on the machine;
- Fans, motors and belt drives may be in motion, always wait for them
to stop and take appropriate precautions to prevent their activation
before accessing them;
- 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 the appropriate personal protective equipment
(helmet, insulated gloves, protective goggles, accident-prevention
shoes, etc.)
- Equip yourself with tools in good condition and make sure to have fully
understood the instructions before using them
- If having to take measurements and perform checks that require the
machine to run, you must:
- make sure that any remote control systems are disconnected; however,
keep in mind that the PLC on the machine controls its functions and
can enable and disable the components creating hazardous situations
(e.g. power and rotate the fans and their mechanical drive systems).
- Operate with the electrical board open the shortest time possible
- Close the electrical board as soon as the single measurement or con-
trol is performed
- For outdoor units, do not perform interventions in dangerous weather
conditions such as rain, snow, fog, etc.
- The cooling circuit contains under pressure refrigerant gas: any opera-
tion must be performed by competent personnel in possession of the
authorisations and qualifications required by current laws
ATTENTION
it is forbidden to LOAD the cooling circuit with a refrigerant gas different
from that indicated. Using different refrigerant gas can
severely damage the unit
- never keep the cooling circuit open, because the oil absorbs humidity
and degrades
- 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 coils 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”
17.
MAINTENANCE
Warning;
Biological hazard
Electricity
Wear head
protection
Wear ear protection
Wear eye protection
Warning;
Sharp element
Wear protective
gloves
Wear safety
footwear
Warning;
Warning;
Warning;
Flammable material
Warning;
Hot surface
