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IOM_ACVBA-ACVA_351a2402_207958_180109_EN
ACVBA-ACVA
PACKAGED VERTICAL COMPACT UNITS
AIR-AIR
MAINTENANCE
It is advisable to schedule maintenance visits every 1,000 operating hours, as well as at the end of summer.
In the event of leak any manipulation and/or recovery of refrigerant shall be completed by qualified and authorized
personnel in accordance with the valid regulation. Add the quantity of oil that has been lost.
CONSERVATION AND CLEANING
Electrical circuit
: Make sure that all electrical connections
–wires, contactors and terminals- are properly tight.
Register the readings of kW and amperes at each compressor and fan motor phase. Verify the starting current. Check
the start current. Check that all mechanical components, pressure switches and phase control relays (for scroll
compressors) are working properly.
Refrigeration circuit
: Check if there is any refrigerant leak, noises or vibration. Proceed to measuring temperatures
and/or pressures of components of the most important components of the system and register them on the maintenance
sheet (compressor discharge and aspiration, expansion
valve, exchangers’ inlet and outlet, etc…)
Compressor:
Check regularly the lubricant level, presence of vibrations or noise and motor insulation.
Coils
: At least once a year clean the condenser coils with water and detergent, then dry with air at low pressure. Never
clean with a wire brush, water and/or air at high pressure (max. 6 bar).
Fans:
Check the direction of rotation of the fans, verify their carriers. Check the transmission elements and the
operating status.
Before handling the fan, make sure that it is disconnected from the mains, even if it is already stopped and no one can
start during the intervention.
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A regular inspection of the unit is required to avoid dirt accumulation in propellers, turbines, motors and grids that
could entail risks and significantly shorten their life. The frequency will depend on the working conditions.
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In cleaning operations be very careful not to unbalance the propeller or the turbine.
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Follow the current safety rules in each country for all maintenance and repairing operations.
Motors and fans do not need additional lubrication.
Transmission belts:
Check the status and tension of the transmission belt, at least twice the first month of operation,
and then every 1000 hours of operation.
Drainage system:
Verify the condition and the correct operation of the drainage tray and drain trap.
Air filters:
Clean the filters after the first operating hours to remove possible light materials such as pieces of paper or
polystyrene, etc. that may have been dragged through air circulation. Clean again every 3 months (or more often
depending on operation). The filters can be cleaned with soapy water. Then rinse them with clean water and let dry. If
necessary replace the filters before they are in poor conditions (refer to the current legislation, EN 779, UNE-EN
13053…).
Before completing any service or maintenance operation, turn the main power switch off to avoid
any personal injuries. Lock it so that anybody else than a qualified technician can switch it on.
WARNING!
