3.2.3 APPLICATIONS REQUIRING ELECTRIC HEAT
)RUDSSOLFDWLRQVWKDWUHTXLUHUHVLVWDQFHHOHFWULFKHDW晩敬搠
LQVWDOOHGKHDWHUNLWVDUHDYDLO
DEOHWKDWDWWDFKHVWRWKHGLVFKDUJHVLGHRIWKHDLUKDQGOHU6HH)LJXUH7KHKHDWHUNLW
LVFRPSDWLEOHIRUERWKKRUL]RQWDODQGYHUWLFDOGLVFKDUJHDSSOLFDWLRQV7KHVXSSO\GXFW
PXVWEHDWWDFKHGWRWKHGLVFKDUJHHQGRIWKHKHDWHUNLW7KHEORZHUPRWRUFRQWDFWRUDQG
VXSSO\ZLULQJLVSURYLGHGZLWKWKHKHDWHUNLW6HH6HFWLRQIRULQIRUPDWLRQFRQFHUQLQJ
WKHDYDLODEOHKHDWHUNLWV
3.2.4 SUSPENDING UNIT
)RXUKHDY\JDXJHDQJOHVDUHIXUQLVKHGLQWKHSDUWVEDJVKLSSHGZLWKWKHDLUKDQGOHUIRU
VXVSHQGLQJWKHXQLWIURPDOOIRXUFRUQHUVDVVKRZQLQ)LJXUHDERYHò´PLQLPXPVXS
SRUWURGVDUHUHFRPPHQGHG,I³$OO7KUHDG´URGVDUHXVHGLWLVUHFRPPHQGHGWKDWWZR
QXWVDQGWZRORFNZDVKHUVEHWLJKWHQHGVHFXUHO\DJDLQVWWKHVXVSHQVLRQDQJOHV
:KHQ WKH DLUKDQGOHU LV VXVSHQGHG DV LOOXVWUDWHG KRW ZDWHU RU VWHDP FRLOV PL[LQJ
ER[HVDQGGLVFKDUJHDLUSOHQXPVFDQQRWEHPRXQWHGGXHWRZHLJKWOLPLWDWLRQV,QWKHVH
DSSOLFDWLRQVDQDOWHUQDWHVXVSHQVLRQPHWKRGVXFKDV晩敬搠
VXSSOLHGDQJOHVRUFKDQQHOV
PXVWEHORFDWHGXQGHUQHDWKWKHDLUKDQGOHU
3.2.5 INSTALLATION IN AN UNCONDITIONED SPACE
7KHH[WHULRUFDELQHWRIDQDLUKDQGOHUKDVDJUHDWHUULVNRIVZHDWLQJZKHQLQVWDOOHGLQDQ
XQFRQGLWLRQHGVSDFHWKDQZKHQLWLVLQVWDOOHGLQWKHFRQGLWLRQHGVSDFH7KLVLVSULPDULO\
GXH WR WKH WHPSHUDWXUH RI WKH FRQGLWLRQHG DLU PRYLQJ WKURXJK WKH DLU KDQGOHU DQG WKH
DLUFLUFXODWLQJDURXQGWKHXQLWZKHUHLWLVLQVWDOOHG)RUWKLVUHDVRQWKHIROORZLQJLVUHF
RPPHQGHGIRUDOODLUKDQGOHUDSSOLFDWLRQVEXWVSHFLDODWWHQWLRQVKRXOGEHSDLGWRWKRVH
LQVWDOOHGLQXQFRQGLWLRQHGVSDFHV
䑵捴楺楮朠慮搠慩牦汯眠慲攠捲楴楣慬湤畳琠扥慳敤渠瑨攠敱畩灭敮琠獥汥捴敤⸠
6XSSO\ DQG UHWXUQ GXFW DWWDFKPHQW ,I RWKHU WKDQ WKH IDFWRU\ 晬慮来猠DUH XVHG WKH
DWWDFKPHQWRIGXFWLQJPXVWEHLQVXODWHGDQGWLJKWWRSUHYHQWVZHDWLQJ
$SSO\ FDXONLQJ DURXQG DOO FDELQHW SHQHWUDWLRQV VXFK DV SRZHU ZLUHV FRQWURO ZLUHV
UHIULJHUDQWWXELQJDQGFRQGHQVDWHOLQHZKHUHWKH\HQWHUWKHFDELQHW6HDOWKHSRZHU
ZLUHVRQWKHLQVLGHZKHUHWKH\H[LWFRQGXLWRSHQLQJ6HDOLQJLVUHTXLUHGWRSUHYHQWDLU
OHDNDJHLQWRWKHXQLWZKLFKFDQUHVXOWLQFRQGHQVDWHIRUPLQJLQVLGHWKHXQLWFRQWURO
ER[DQGRQHOHFWULFDOFRQWUROV7DNHFDUHQRWWRGDPDJHUHPRYHRUFRPSUHVVLQVXOD
WLRQZKHQDSSO\LQJWKHFDXON
,Q VRPH FDVHV WKH HQWLUH DLU KDQGOHU FDQ EH ZUDSSHG ZLWK LQVXODWLRQ 7KLV FDQ EH
GRQH DV ORQJ DV WKH XQLW LV FRPSOHWHO\ HQFORVHG LQ LQVXODWLRQ VHDOHG DQG VHUYLFH
DFFHVVLVSURYLGHGWRSUHYHQWDFFXPXODWLRQRIPRLVWXUHLQVLGHWKHLQVXODWLRQZUDS
$Q DX[LOLDU\ RYH牦汯Z SDQ LV UHFRPPHQGHG WR SURWHFW WKH VWUXFWXUH IURP H[FHVVLYH
FDELQHWVZHDWLQJRUDUHVWULFWHGFRLOGUDLQOLQH6HH6HFWLRQ
3.2.6 INSTALLATION IN CORROSIVE ENVIRONMENTS
7KHPHWDOSDUWVRIWKLVXQLWPD\EHVXEMHFWWRUXVWRUGHWHULRUDWLRQLIH[SRVHGWRDFRU
URVLYHHQYLURQPHQWZKLFKFDQVKRUWHQLWVOLIH,QDGGLWLRQWRH[SRVXUHWRWKHH[WHULRURI
WKHFDELQHWFKHPLFDOFRQWDPLQDQWVLQVLGHWKHEXLOGLQJWKDWFDQEHGUDZQLQWRWKHXQLW
IURPWKHUHWXUQDLUJULOOHDQGDWWDFNVWUXFWXUDOPHWDOSDUWVHOHFWULFDOFRPSRQHQWVDQGWKH
LQGRRUFRLOFDXVLQJSUHPDWXUHIDLOXUHRIWKHXQLW,IWKHXQLWLVWREHLQVWDOOHGLQDQDUHD
ZKHUHFRQWDPLQDQWVDUHOLNHO\WREHDSUREOHPVSHFLDODWWHQWLRQVKRXOGEHJLYHQWRLVR
ODWHWKHXQLWDQGUHWXUQJULOOHIURPFRQWDPLQDQWV
FIGURE 4
APPLICATIONS REQUIRING ELECTRIC HEAT
