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CHARGING UNIT REFRIGERATION SYSTEM

CHARGING UNIT REFRIGERATION SYSTEM. By Drs. J A Y A MOH. ARIS AS’ARI , S.Pd. REFRIGERATION AND AIR CONDITIONING TECHNICAL SKILL PROGRAM SMKN 1 CIREBON Visit us on : ptu.smkn1-c i r e b on .sch.id.

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CHARGING UNIT REFRIGERATION SYSTEM

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  1. CHARGING UNIT REFRIGERATION SYSTEM By Drs. J A Y A MOH. ARIS AS’ARI, S.Pd • REFRIGERATION AND AIR CONDITIONING TECHNICAL SKILL PROGRAM • SMKN 1 CIREBON • Visit us on : ptu.smkn1-cirebon.sch.id

  2. Pengisianrefrigeran (charging) kedalamsistemharussesuaidengantakaran. kelebihanrefrigerandalamsistemdapatmenyebabkantemperaturevaporasi yang tinggiakibattekananrefrigeran yang tinggiselainitudapatmenyebabkankompresorrusakakibatkerjakompresorterlaluberatdanadanyakemungkinan liquid suction. • Sebaliknya, jikajumlahrefrigeran yang diisikansedikit, makarefrigeranakankekuranganbahanpendingin. • Proses pengisianrefrigeranada 2 cara : • Mengisisistemmelaluisisitekananrendah • Mengisi refrigerant melaluisisitekanantinggi • Pastikanpadasetiappengisian refrigerant, clamp meter/tang ampere selaluterpasangpada line kompresor.

  3. Indikatorpengisianbahwarefrigerantelahtercukupiadalahsbb: • Mengisisistemberdasarkanberatrefrigeran. • Mengisirefrigeranberdasarkanbanyaknyabungaes di evaporator. • Mengisisitemberdasarkantemperaturdantekanan. • Mengisisistemberdasarkan ampere kompresor • Untukpengisianrefrigerandalamkondisicair, makaharusmelewati discharge service valve denganmembaliktabungrefrigeran. Usahakanpengisiansedikit demi sedikituntukmenghindaritekananbalikdarisistemkedalamtabungrefrigeran. • Tekanan discharge kitakonversikandari temperature media pendinginudaraditambah 15-20°C.

  4. Contohtekanansuction sekitar 10 psi makajikakitakonversikanke bar makaberkisar 0.699 bar. • Makaandaikitakonversikanke temperature evaporator, maka refrigerant di dalam evaporator akanbertemperatur -34°C. • Sedangkantekanan discharge, jikasuhuudaraluar 30°C makakitatambah 20°C sehingga temperature discharge 50°C, makadiketahuitekanan discharge = 13.176 bar atau 191 psi. • (1 psi = 0.06895 bar = 6.895 kPa/ 1 bar = 14.5 psi = 100 kPa)

  5. Charging refrigerandalamkondisiuap

  6. Charging refrigerandalamkondisi liquid

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