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IOM_ACVBA-ACVA_351a2402_207958_180109_EN
ACVBA-ACVA
PACKAGED VERTICAL COMPACT UNITS
AIR-AIR
MAINTENANCE
LUBRICANT
R-410A refrigerant compressors use synthetic polyol ester oil. Each compressor manufacturer has a specific oil for their
products.
The compressor or system should not remain open to atmosphere for more than 15 minutes.
Synthetic ester-type lubricants (POE, Polyol Ester) with a high solubility level with R-410A are used. These types of oil are
very hygroscopic and shall be handled with more care than the conventional oils. Moreover, when these synthetic oils are
mixed with minerals (MO) or alkylbenzenes (AB), they deteriorate causing capillary blockage or failure in the compressor.
DO NOT MIX UNDER ANY CIRCUMSTANCES.
REFRIGERANT CHARGE
Should it be necessary to add or recover refrigerant use a digital scale that is suitably reinforced and prepared to
withstand the handling of the refrigerant bottle.
The charge must be made in the LIQUID condition.
The inlet of liquid refrigerant R-410A in the empty tubes causes temperatures below 0ºC until the internal pressure
reaches 7 bars.
Leaks should be repaired immediately.
Never overcharge the system.
Never use the compressor as a vacuum pump.
If leakage symptoms appear during operation proceed to a leak test.
A HCF detector is necessary in case of small leaks.
If a gas leak is detected proceed to removing and recuperating the entire refrigerant charge. Pressurize the system
with dry nitrogen. If no leak is detected proceed to vacuuming the system and refill with refrigerant.
Do not reintroduce the used refrigerant, send it to an authorized recycling plant.
Never use oxygen to pressurize the system or purge lines for leak test. Oxygen reacts violently
with oil which may entail an explosion that could lead to damages, personal injury or event
death.
WARNING!
Should it be necessary to make brazing operation first of all proceed to filling the circuit with dry
nitrogen. Burning refrigerant produces toxic gas emissions.
WARNING!
