30
IOM_ACVIBA HE_35ia80i_207910_190501_EN
ACVIBA HE
AIR-AIR PACKAGED UNITS
COMPACT VERTICAL INVERTER
MAINTENANCE
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).
Repairing operations must be carried out by trained specialists only.
Wear safety shoes and gloves adapted to each operation!
Please observe the safety regulations and the worker’s protection rules for any maintenance and service operation
(EN 50 110, IEC 364).
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.
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.
Charge to be in the LIQUID state.
Introduction of R-410A refrigerant in the liquid state inside empty tubes produces 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.
COMPRESSOR LUBRICATION
R-410A refrigerant compressors use synthetic oils. Each manufacturer uses a specific oil for his product.
The compressor or system should not remain open to atmosphere for more than 15 minutes.
The used synthetic oils are of type POE (Polyol Ester) and PVE (Polyvinyl-ether). They have a high solubility level with
the R-410A. These types of oil are very hygroscopic and shall be handled with more care than the conventional oil.
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 THEM UNDER ANY CIRCUMSTANCES.
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.
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.
Should it be necessary to complete brazing operation first of all proceed to filling the circuit with dry
nitrogen. Burning refrigerant produces toxic gas emissions.
WARNING!
WARNING!
WARNING!
