ʻO ka hana a ka mea hoʻopaʻa wai ʻo ia ka mālama ʻana i ka wai refrigerant i hāʻawi ʻia i ka evaporator.Ma hope o ka hele ʻana o ka refrigerant kiʻekiʻe i ka hopena wela o ka condenser, lilo ia i ke kinoea-wai ʻelua-phase mokuʻāina, akā pono ka refrigerant e komo i ka evaporator ma kahi kūlana wai.ʻO ka hopena hoʻomaha maikaʻi, no laila pono e hoʻokomo ʻia kahi mea hoʻokipa wai ma hope o ka condenser e mālama i ka refrigerant kiʻekiʻe ma ʻaneʻi, a laila e hoʻouna ʻia ka mea hoʻoheheʻe wai i huki ʻia mai lalo i ka evaporator, i hiki i ka evaporator ke pāʻani i kona kūlana maikaʻi loa.Loaʻa i ka hopena hoʻomaha maikaʻi loa.