Ukuphepha kubaluleke kakhulu ezimeni zezimboni, ikakhulukazi uma ubhekene nezimo ezingase zibe neziqhumane. Izinjini ezingaqhumisi uthuliaklanyelwe ukusebenza ngokuphepha ezindaweni lapho kungase kube khona uthuli oluvuthayo. Ukuhlukaniswa kwalezi zinjini kubalulekile ukuze kuqinisekiswe ukuhambisana nezindinganiso zokuphepha kanye nokuvikela izinto zokusebenza nabasebenzi.
Usemotor kagesii-nameplate yemodeli ihlale ihlanganisa izinkomba ezimbalwa ezibalulekile ezihlinzeka ngolwazi olubalulekile mayelana nokufaneleka kwemoto ukuthi isetshenziswe endaweni ethile eyingozi. Isibonelo, ukuhlukaniswa kwezinhlobo zothuli zimelelwa izinhlamvu IIIA, IIIB, kanye ne-IIIC. I-IIA imele uthuli oluvuthayo, olungasindi, olungena emoyeni kalula, futhi oluletha ingozi enkulu yokuqhuma. I-IIB imele uthuli olungaqhubeki, olungenabungozi kangako kodwa esadinga ukuphathwa ngokucophelela. I-IIC imele uthuli oluqhutshwayo, olungase luveze ingozi enkulu yokuthungela ngenxa yekhono layo lokuthwala umsinga kagesi.
Igama elithi "tD" libonisa ukuthi indawo evalekile yenjini ifanele ukusetshenziswa kokuvikela ukuqhuma kothuli, iqinisekisa ukuthi ingakwazi ukumelana nezingcindezi namazinga okushisa ahambisana nokuqhuma kothuli. Ngaphezu kwalokho, ukuhlukaniswa kwe-"B21" kubonisa ukuthi injini ifanele ukusetshenziswa ku-Zone 21, okungukuthi izindawo lapho amafu othuli avuthayo angase avele ngaphansi kwezimo ezijwayelekile zokusebenza.
Izinga lokuvikela nalo libalulekile, i-IP65 ikhombisa ukuthi injini ivikela uthuli futhi ayingeni manzi, efaneleke kakhulu ezindaweni ezinokhahlo. Ngaphezu kwalokho, umkhawulo wokushisa ophezulu wendlu yedivayisi ngu-T135 ℃, uqinisekisa ukuthi injini ayidluli leli zinga lokushisa, ngaphandle kwalokho kungabangela uthuli oluzungezile ukubamba umlilo.
Ukuqondauthuli kanye nesithuthuthu esingaqhumiamamodeli abalulekile ekukhetheni okokusebenza okufanele kwezindawo eziyingozi. Ngokucabangela izici ezifana nohlobo lothuli, izinga lokuvikela, nemikhawulo yezinga lokushisa, izimboni zingaqinisekisa ukusebenza okuphephile nokusebenza kahle ezindaweni ezingase zibe neziqhumane.