Ngenxa yokumuncwa komswakama okungokwemvelo kwekhabhoni emnyama, i-PE ehlanganisiwe emnyama izwela umswakama.Isikhathi eside sokulondoloza noma indawo yokugcina eqinile izokwandisa umswakama.Ngaphansi kwezimo ezijwayelekile nezinhlelo zokusebenza, sincoma ukushisa kwangaphambili okungenani ihora elingu-1 kanye nezinga lokushisa eliphakeme elingu-90 °C.