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IOM_UMXCBA-UMXCA_801.1a4502.2_208027_200201_EN
UMXCBA/UMXCA
CONDENSER UNITS WITH
COMPRESSOR AND AXIAL FAN
MAINTENANCE
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. It is
necessary to clean the condensate trays after the first day of operation. Then, clean them at least once a
year. Take into account the meteorological conditions, e.g. in areas where falling leaves or the flight of
seeds may obstruct the drain trap, it will also be necessary to clean them at mid and late spring and
autumn. The dates are approximate and will depend on the blooming, falling leaves, seeds, etc. of the
plants of the zone or the human activity or any other cause.
(Check the access to the condensates trays)
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…).
COMPRESSOR 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 THEM 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 proceed previously to filling the circuit with
dry nitrogen. Burning refrigerant produces toxic gas emissions.
WARNING!
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