General Safety Standards - Stulz COSMOTEC CVE Serie Manual De Uso Y Mantenimiento

First checks after start-up
Check that the air blown out to the environment flows correctly and
is not recycled, even partially
Check that the air flowing around the cabinet circulates uniformly Check that the air flowing around the cabinet circulates uniformly
and that there are no obstructions.
While the unit is operating, check that the supply voltage maintains While the unit is operating, check that the supply voltage maintains
the values indicated on the identification plate.
Check correct phase sequence of power supply on three phase Check correct phase sequence of power supply on three phase
models. If compressor doesn't work correctly could be damaged models. If compressor doesn't work correctly could be damaged
quickly. In case the sequence is not correct, reverse the wiring. quickly. In case the sequence is not correct, reverse the wiring.
Correct compressor operation can be checked:
- by measuring the temperature at the condenser outlet, if this by measuring the temperature at the condenser outlet, if this
temperature is noticeably higher than the external temperature, the temperature is noticeably higher than the external temperature, the
compressor is working correctly.
- by measuring the temperature at the evaporator outlet, if this by measuring the temperature at the evaporator outlet, if this
temperature is noticeably lower than the intake temperature, the e is noticeably lower than the intake temperature, the
compressor is working correctly
Otherwise, the compressor is turning in the wrong direction and the Otherwise, the compressor is turning in the wrong direction and the
phase sequence must be changed. Check there are no alarms.
Check fans work correctly.
Check unit work in according to correct working logic. in according to correct working logic.
Shutdown
No particular actions are required to shut down the unit. Disconnect No particular actions are required to shut down the unit. Disconnect
the unit from power.
The ON-OFF key on the C2020 display (if present) is only used o put OFF key on the C2020 display (if present) is only used o put
the unit on stand-by. It must not be thought by. It must not be thought to be a safety
component to turn the unit off prior to performing maintenance. component to turn the unit off prior to performing maintenance.
10. MAINTENANCE
The reliability and full automation of the moving parts signifies The reliability and full automation of the moving parts signifies
minimal ordinary maintenance, which must nevertheless be carried minimal ordinary maintenance, which must nevertheless be carried
out as and when required. Lack of maintenance will not only
compromise the operation and working life of the air conditioner compromise the operation and working life of the air conditioner
but will also render the warranty null and void. In order to maintain but will also render the warranty null and void. In order to maintain
the equipment efficiency and safety, the activities listed below must the equipment efficiency and safety, the activities listed below must
be performed throughout the working life of the machine ut the working life of the machine
ATTENTION!
Before carrying out any work on the unit, disconnect it from the Before carrying out any work on the unit, disconnect it from the
power supply.
PREVENTIVE MAINTENANCE SCHEDULE
Monthly
Check that the exchanger (condenser), the grilles (protection Check that the exchanger (condenser), the grilles (protection
fans)and filters (if present) are clean and that any dirt does not present) are clean and that any dirt does not
obstruct the passage of air.
Check for the presence of unusual noises during operation. Check for the presence of unusual noises during operation.
Check the condensate drain pipe of the unit is fully operating and Check the condensate drain pipe of the unit is fully operating and
free.
Six-monthly
Check that the fan motors and other components do not generate
abnormal vibrations or show signs of overheating. abnormal vibrations or show signs of overheating.
For units containing more than 3 kg of coolant it is compulsory to For units containing more than 3 kg of coolant it is compulsory to
verify the absence of refrigerant leaks, according to European verify the absence of refrigerant leaks, according to European
the environment flows correctly and
of maintenance will not only
components do not generate
Regulation 842/2006. Checks should be marked on the equipment Regulation 842/2006. Checks should be marked on
register. If circuit is hermetically sealed, obligation is needed only if register. If circuit is hermetically sealed, obligation is needed only if
on circuit are present 6 kg of gas.
NB: If the unit operates in a particularly dusty environment or if If the unit operates in a particularly dusty environment or if
experience dictates the need for more frequent cleaning, the unit experience dictates the need for more frequent cleaning, the un
must be cleaned.
IMPORTANT
After each ordinary and extraordinary maintenance, check the After each ordinary and extraordinary maintenance, check the
perfect efficiency of the condensate drainage. perfect efficiency of the condensate drainage.
REPLACING COMPONENTS
It is advisable to replace the fans after 40,000 hours of operation It is advisable to replace the fans after 40,000 hours of operation
CLEANING THE HEAT EXCHANGER.
Before carrying out any work on the unit, disconnect it from the Before carrying out any work on the unit, disconnect it from the
Do not use caustic or acidic substances to clean any of the Do not use caustic or acidic substances to clean any of the
exchanger components exchanger components
During the cleaning operations, wear safety glasses, rubber gloves During the cleaning operations, wear safety glasses, rubb
compatible with the detergent being used, and safety shoes. compatible with the detergent being used, and safety shoes.
The filter cleaning (where present) should be done after removing it The filter cleaning (where present) should be done after removing it
from the air conditioner. If it is decided to replace it, use only from the air conditioner. If it is decided to replace it, use only
original STULZ SpA parts.
The components inside the air conditioner, ambient side or cabinet
side, must be cleaned with unit not fitted with ground voltage, with side, must be cleaned with unit not fitted with ground voltage, with
cleaning fluid and compressed air with pressure not exceeding 4 bar. cleaning fluid and compressed air with pressure not exceeding 4 bar.
DOWNTIME STOPS
If the unit remains inactive for a long time, it is necessary to If the unit remains inactive for a long time, it is necess
discharge any condensate residues and make a general cleaning. discharge any condensate residues and make a general cleaning.
11. INFORMATION ON RESIDUAL RISKS AND EMERGENCY 11. INFORMATION ON RESIDUAL RISKS AND EMERGENCY
SITUATIONS
This equipment has been designed limiting any possible sources of This equipment has been designed limiting any possible sources of
danger or hazardous situations to the minimum possible. These danger or hazardous situations to the minimum possible. The
situations or sources of danger originate from improper use or non- situations or sources of danger originate from improper use or non
compliance with standards governing installation and use. This compliance with standards governing installation and use. This
information must be made known to all personnel working on or information must be made known to all personnel working on or
near to the equipment.

11.1 GENERAL SAFETY STANDARDS

11.1 GENERAL SAFETY STANDARDS
All personnel inspecting, using and maintaining the equipment must sonnel inspecting, using and maintaining the equipment must
be aware of the following safety requirements: be aware of the following safety requirements:

The warning signs must be clearly visible in areas of potential The warning signs must be clearly visible in areas of potential
danger.

Danger areas must be covered by a visual monitoring Danger areas must be covered by a visual monitoring system.
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ATTENTION! ATTENTION!
power supply power supply
ATTENTION! ATTENTION!
he air conditioner, ambient side or cabinet
CVE-CVO