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i y i � <br /> � , � ,. • . . <br /> illi , � `r , <br /> Chapter 3—System Design <br /> Page 3-19 - <br /> REV. 1 <br /> DETECTOR PLACEMENT . � <br /> De;ectors are requlred over cooking appliences and In the � <br /> duct(s)of protected venillaflon f�oods. Defectors shalf be <br /> focaied in fhe plenum area of the ventilatfon hood. . <br /> Exhaust Duct(s). <br /> Each exhausi duct must have at least one(1)de(ector <br /> Inslalled in the duct entrancs, located in ths alr stream oF the - <br /> cooking vapors at a maxlmum of 12 feet(3.7 m)inio the � <br /> ►ducf.See Ffgure 3-23. I <br /> r �t F[gure 3-23a. <br /> 5= = �V—�+ia--Y� — 000z�a <br /> Cooking Appliance(s). <br /> Each cooking appllance wlth a contEnuous cooking surface <br /> ���M��"'� not exceedfng 48 fn.x 48 fn.(122 x 122 cm)shall be <br /> prolecled by one(1)detactar.Cooking applfances with a <br /> contlnuous cooking surface exceeding 48 in.x 48!n.(122 x <br /> 122 cm)shalf be protected by one (1)detector per 48 in.x <br /> 48 1n. (122 x 422 cm)cooking area. Detectors used for <br /> ►cooking appllances musl be located'abov@ the protected <br /> appllance toward the exhauat duct side of the applfance.The <br /> detector should be located In the aIr slream of the appliance <br /> ---_ _ to enhance system response time. <br /> F3gure 3-23. If a cooktng applience Is located under a duct opening where <br /> 0068°'P0 a defacior has been mounted, 1f is not necessary to utillze <br /> ' an addltfonel detector provided the duct detector Is not more <br /> NOTICE than 12 In.(31 cm)lnto the duct opening, lf lwo(2)appli- - <br /> When gas appllances ere used and the(fue gases from ances are focated under a duct opening where a deiector <br /> the burner are exhausfed into the duct,the detector must �88 been mounted, It]s not necessary to ulfllze an additfonal <br /> be kept ouf of the atr sfream of lhase exhaust gases, detector provlded ihe duct deteetor Is not more than 12 in. <br /> These gases can be very hot and could actuete [he (31 cm}lnto fhe duct opening. See Ftgure 3-24. <br /> system unnecessatily. <br /> �.._. <br /> Duct openings lhat are long and narrow pr large enough <br /> ko requlre multiple duct nozz)es may require addttionai <br /> detectors. <br /> � �� ------_��-.._____ <br /> Electrostatic Precipitator. �A� �� (�} <br /> lf an elactrostaHc precipitalor Is located at or near ihe base of <br /> tha exhaust duct,ff is necessary to loca(e a detector below ihe <br /> precipitator,af Ihe base of the duct,and also locate one!n tha <br /> duct,Just above the precipltator.See Figure 3-23a. <br /> When instal!!ng tha detector bra�ket and system condult,malce <br /> cerialn they do not intertere wllh the operatfon of lhe cov Ren� Acoveft�oE apP��ANCE APPLIAMCE . <br /> .precipitator. HY �Y covEaEn COVEREp <br /> DE7EC70R OETECTOR BY �Y <br /> q g dETECTOA pETECTOA <br /> � G <br /> Figure 3-24, proper Detector Piacement. <br /> �s/�PC - <br /> ULEX 3830 " <br /> PN551274(3) August 4,2005 <br />