Ukuze kuvikelwe imvelo, S&A Iyunithi yokupholisa amanzi yase-Teyu ikhokhiswa iziqandisi ezingavumelani nemvelo, okuhlanganisa i-R-410a, i-R-407C ne-R-134a. Kodwa-ke, ekuthuthweni kwezindiza, isiqandisi sidinga ukuchithwa, ngoba isiqandisi siyaqhuma futhi siyasha futhi asivunyelwe ekuthuthweni komoya. Ngakho-ke, lapho abasebenzisi bethola iyunithi yokupholisa amanzi, badinga ukuthi isiqandisi sigcwaliswe kabusha ngesiqandisi esishiwo endaweni yesevisi yendawo yokupholisa umoya.
Mayelana nokukhiqizwa, i- S&A I-Teyu itshale izimali zokukhiqiza ezingaphezu kwesigidi samayuan, iqinisekisa ikhwalithi yochungechunge lwezinqubo kusukela ezingxenyeni eziyinhloko (i-condenser) ye-chiller yezimboni kuya ekushiseleni kweshidi lensimbi; ngokuphathelene nempahla, S&A I-Teyu imise izindawo zokugcina izimpahla emadolobheni amakhulu aseShayina, inciphise kakhulu umonakalo ngenxa yokuhanjiswa kwezimpahla ezikude, kanye nokusebenza kahle kwezokuthutha; mayelana nesevisi yangemuva kokuthengisa, isikhathi sewaranti iminyaka emibili.
