Daikin UATYQ55ABAY1 [37/44] External cleaning

Translation from original instructions

Installation manual

We reserve the right to make changes without any prior notice.

UATYQ*Y1

Packaged Rooftop

4P522680-1

7.2 External cleaning

Thecomponentoftheunitthatneedsmostcareisthennedpackheatexchanger.

Itisessentialtokeepitcleanandfreeofdirtand/ordepositsthatcanhinderorpreventairow.

Regular cleaning of the surface of the coil is essential for the unit to work correctly and also increases the operating

life of the exchanger and the unit.

Frequentandcorrectcleaningofthecoilscontributestoconsiderablyreducingcorrosion.

Whilecleaningthennedpackheatexchanger,theelectricalcontrolpanelmustbeclosedandthe

main disconnect switch must be locked in the "OFF" position.

Using a jet of water on the coil while it is still dirty will cause deposits and pollutants to remain inside

theexchanger,whichwillmakecleaningevenmoredi󰀩cult.Allthedirtanddepositsmustthereforebe

removed from the surface before rinsing.

For units installed in coastal or industrial areas or in areas where there are aggressive chemicals in

theair,periodicrinsingwithcleanwaterisconsiderablybenecialandhelpscountercorrosivee󰀨ects.

Never clean the coils with chemicals, water containing bleach or acid or basic detergents. These

detergentscanbedi󰀩culttorinseo󰀨andcouldacceleratecorrosiononthejointbetweenpipeandn

andinareaswheredi󰀨erentmaterialscomeintocontact(CuandAl).

7.2.1 Cleaning the coils

The coils can be cleaned with a vacuum cleaner or a brush with soft, non-metallic bristles.

Alwayscleaninthedirectionofthensandneverperpendicularlytothem.Theycaneasilybebentanddamaged.

Cleanintheoppositedirectiontothenormalairow.

Thecoilcanthenberinsedusingonlydrinkingwateratlowpressure(3-5barg).

Rinsingmustbecarriedoutwithalowpressurejetofwatertoavoiddamagingthens.

Never use jets of water or high-pressure compressed air to clean the coil. The force of the jet of air or

watercouldbendthens,withaconsequentincreaseinaeraulicheadlossesontheexchangerand

lowering of the performance of the unit.