Daikin UATYQ20ABAY1 [33/44] Checks during operation

Translation from original instructions

Installation manual

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

UATYQ*Y1

Packaged Rooftop

4P522680-1

6.4 Checks during operation

Withthecircuitsoperatingat100%andstableatworkingconditionsnearthenominalones,check:

- thattheelectricalabsorptionoftheunitisclosetothedatashowninthewiringdiagram.Considerablydi󰀨erent

valuesmaybeduetothereducedcapacityoperationoftheunit,toworkingconditionsverydi󰀨erentfromthe

nominal ones or to the malfunctioning of one or more components.

- thatthedi󰀨erencebetweenthecondensingtemperatureofeachcircuitandthatoftheairislessthan25°C.Ifit

is greater, check that all the fans involved are turning correctly and that there are no obstructions or dirt on the

surface of the condensing coil;

- thesuperheatingvalueofthesuctiongas:theoptimalvalueisbetween4and7°C;

- thesubcoolingvalueoftheliquidleavingthecondenser:theoptimalvalueisbetween5and10°C;

- thattheliquidsightglassisgreen;

- thatnobubblesappearonthesightglassplacedintheliquidpipe.Thecontinuouspresenceofbubblesmay

indicate a lack of refrigerant charge; the occasional or sporadic presence of bubbles is allowed;

- thattherefrigerantlterisnotblockedorclogged.Tothisend,itissu󰀩cienttomeasurethetemperatureofthe

liquidpipeimmediatelybeforeandimmediatelyafterthelter,andcheckthattherearenosignicantdi󰀨erences

(uptoacoupleofdegreesCdi󰀨erenceisallowed).

- that the condensate drain is working correctly.