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IOM_CCHBA- CCHA_201a1201_208029_200201_EN
CCHBA-CCHA
HORIZONTAL CONDENSER UNITS
WITH COMPRESSOR AND CENTRIFUGAL FAN
MAINTENANCE
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It is advisable to schedule maintenance visits every 1,000 operating hours, as well as at the end of summer. Please keep
an updated record of all maintenance operations and readings (maintenance sheet).
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Repairing operations must be carried out by trained specialists only.
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Wear safety shoes and gloves adapted to each operation.
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Please observe the safety regulations and the worker’s protection rules for any maintenance and service operation (EN
50 110, IEC 364).
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No maintenance work with running fans! Warning because fans can rotate without having power supply, e.g. pushed by
air currents.
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Make use of fire protections in brazing operations.
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In case of leakage, 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
Precaution!
Do not use aggressive cleaning products nor varnish solvents.
Avoid water penetration inside the motor or to the electronic components (e.g. through the direct contact with joints or
holes of the motor), observe the protection class (IP).
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 so on 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, the presence of vibrations or noise and the 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 working on the fan make sure that it is disconnected from the main power supply even though it is already stopped and
control that nobody may start it during the intervention.
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.
Keep the airways of the fan free
– danger of expulsion of objects!
Check the free flow of the condensation water through the evacuation openings is necessary (if there are any).
During cleaning operations be very careful not to unbalance the propeller or the turbine.
In case of incorrect cleaning operations no guarantee is assumed regarding corrosion formation / paint adhesion for unpainted
/ painted fans.
To avoid humidity accumulation in the motor the fan must be operated during at least 1 hour at 80 to 100% of its maximum
speed before cleaning!
Before completing any service or maintenance operation, turn the main power switch off to avoid
any personal injuries. Lock it so that nobody else than a qualified technician can switch it on.
Before opening the electrical panel and having access to the inside of the machine it is MANDATORY
to disconnect the power supply hose of the machine which MUST BE FREE OF VOLTAGE for this
operation.
