Unid.: mmUnid.: mm

Unid.: mm

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NBR 9441/1998

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24

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NBR 9441/1998

2525

A-11.2

O aquecedorO aquecedor

éé

posto a uma distposto a uma dist

ââ

ncia segura contrancia segura contra m

óó

veis e outros materiais inflamveis e outros materiais inflam

áá

veis, e o chveis, e o ch

ãã

éé

protegidoprotegido com uma folha de alum

com uma folha de alum

íí

nio de 50 cm x 50 cm contra anio de 50 cm x 50 cm contra a queda acidental de materiais incandescentes no ensaio. queda acidental de materiais incandescentes no ensaio.

A-11.3

Os lugares escolhidos para o ensaio devem ser osOs lugares escolhidos para o ensaio devem ser os mais desvantajosos poss

mais desvantajosos poss

íí

veis em relaveis em rela

çãçã

àà

instalainstala

çãçã

o doso dos detectores autom

detectores autom

áá

ticos e da movimentaticos e da movimenta

çãçã

o do ar, maso do ar, mas dentro do raio de a

dentro do raio de a

çãçã

o pretendido pelo detector. Se umao pretendido pelo detector. Se uma

áá

rea fica fora do raio de area fica fora do raio de a

çãçã

o do detector, de acordo como do detector, de acordo com esta Norma, o sistema pode ser considerado projetado ou esta Norma, o sistema pode ser considerado projetado ou instalado inadequadamente, a n

instalado inadequadamente, a n

ãã

o ser que o ensaio mostreo ser que o ensaio mostre

condi

çãçã

o, por umidade ou aquecimento do teto pelo sol ouo, por umidade ou aquecimento do teto pelo sol ou pelas l

pelas l

ââ

mpadas da iluminampadas da ilumina

çãçã

o nao na

áá

rea.rea.

A-11.11

Quando a detecQuando a detec

çãçã

o da fumao da fuma

çç

a pode ser garantidaa pode ser garantida somente em uma condi

somente em uma condi

çãçã

o especo espec

íí

fica do ambiente, qualquerfica do ambiente, qualquer altera

altera

çãçã

o desta condio desta condi

çãçã

o deve ser indicada na central eo deve ser indicada na central e nos quadros sin

nos quadros sin

óó

ticos como defeito (ou o sistema fora deticos como defeito (ou o sistema fora de uso por problemas f

uso por problemas f

íí

sicos). Por exemplo: portas ou janelassicos). Por exemplo: portas ou janelas abertas, se esta condi

abertas, se esta condi

çãçã

o favorece um aumento exageradoo favorece um aumento exagerado da passagem do ar na

da passagem do ar na

áá

rea, impossibilitando a detecrea, impossibilitando a detec

çãçã

o dao da fuma

fuma

çç

a.a.

A-12

Para o ensaio prPara o ensaio pr

áá

tico de detectores de temperatura,tico de detectores de temperatura,

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26 NBR 9441/1998NBR 9441/1998

b)No caso de rampas de cargas e descargas, o material b)No caso de rampas de cargas e descargas, o material

medido em circula

medido em circulaçãção pelao pelaáárea deve ser levado em con-rea deve ser levado em con- ta como base no ensaio.

ta como base no ensaio. c)O usu

c)O usuáário pode aceitar alterario pode aceitar alteraçõções nas condies nas condiçõções dees de ensaio, quando forem tomadas as precau ensaio, quando forem tomadas as precauçõçõeses necess

necessáárias e os resultados aceitos pelosrias e os resultados aceitos pelos óórgrgããos pos púúblicosblicos competentes e pelas seguradoras.

competentes e pelas seguradoras.

A-13

Se o detector ou a fiaSe o detector ou a fia

çãçã

o mostram deformao mostram deforma

çõçõ

es oues ou curto-circuito provocados pelo calor no ensaio antes que o curto-circuito provocados pelo calor no ensaio antes que o detector entre em estado de alarme, a instala

detector entre em estado de alarme, a instala

çãçã

o nesteo neste caso espec

caso espec

íí

ficofico

éé

inadequada e deve ser alterada parainadequada e deve ser alterada para

de outras instala

çõçõ

es, quando estaes, quando esta

áá

rea nrea n

ãã

o estiver es-o estiver es- pecificamente citada na documenta

pecificamente citada na documenta

çãçã

o.o.

A-14.2

Esta documentaEsta documenta

çãçã

o deve ser elaborada e aceita emo deve ser elaborada e aceita em conjunto com a oferta de um projeto e n

conjunto com a oferta de um projeto e n

ãã

o pode sero pode ser apresentada posteriormente e utilizada para limitar a apresentada posteriormente e utilizada para limitar a responsabilidade do fornecedor ou instalador na data da responsabilidade do fornecedor ou instalador na data da entrega do sistema.

entrega do sistema.

Notas

Notas: a): a) As As explexplicaicaçõções dos ensaios foram apresentadas paraes dos ensaios foram apresentadas para detectores pontuais.

detectores pontuais. b)Para sistemas de detec

b)Para sistemas de detecçãção de inco de incêêndio lineares ou dendio lineares ou de Licença de uso exclusivo para Target Engenharia e

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