Оценок - 2, средний балл: 4
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Фрагмент инструкции
C. HRVD or HRVB Hooded Roof Ventilators configured for supply shall be furnished with filters as indicated on the drawings and fan schedule. D. Fans shall be rated and tested in accordance with ANSI/AMCA Standard 210-99. E. All motors and electrical components shall conform to NEMA standards. 2 22. ..0 00 F FFA AAN NN H HHO OOU UUS SSI IIN NNG GG - --D DDI IIR RRE EEC CCT TT D DDR RRI IIV VVE EE M MMO OOD DDE EEL LL H HHR RRV VVD DD A. Fan shall be axial flow, roof mount, and direct drive configuration consisting of a hood section and fan housing with curb base. B. Fan housing and curb base shall be of welded heavy gauge steel construction. C. Fan motor base shall consist of heavy gauge steel welded directly to fan housing. D. Fan housing and motor base shall be coated with an air dried gray enamel finish. E. Fan shall have an aluminum hood with bird screen. 2 22. ..1 11 F FFA AAN NN H HHO OOU UUS SSI IIN NNG GG - --B BBE EEL LLT TT D DDR RRI IIV VVE EE M MMO OOD DDE EEL LL H HHR RRV VVB BB A. Fan shall be axial flow, roof mount, and belt drive configuration consisting of a hood section and fan housing with curb base. B. Fan housing and curb base panel shall be of welded heavy gauge steel construction. C. Fan motor, shaft and bearings support base shall consist of heavy gauge steel welded directly to fan housing. D. Fan housing and motor base shall be coated with an air dried gray enamel finish E. Fan shall have an aluminum hood with bird screen. 3 33. ..0 00 F FFA AAN NN I IIM MMP PPE EEL LLL LLE EER RR A. Axial impeller shall be constructed of spark resistant, die cast aluminum airfoil shaped blades secured to a die cast aluminum hub assembly. B. Axial impeller blades shall be of adjustable pitch construction with multiple hub-to-blade arrangements to maximize air performance. Blade pitch angles shall be factory set. C. Axial impeller hub shall be designed to incorporate a split taper bushing, and be keyed directly to drive shaft. 4 44. ..0 00 F FFA AAN NN M MMO OOT TTO OOR RR A AAN NND DD D DDR RRI IIV VVE EE A. Motor shall be TEFC industrial duty and conform to NEMA standards. B. Motor shall be of voltage, horsepower, RPM and enclosure as indicated on the fan schedule. C. Fan sheaves shall be cast iron and appropriately sized and aligned. D. Fan belts shall be static conducting, plus oil and heat resistant. E. Fan shaft shall be steel, turned, ground and polished. F. Fan shaft bearings shall be lubricated, self-aligning ball type in cast iron pillow block mounts with external grease fittings. 5 55. ..0 00 O OOP PPT TTI IIO OON NNA AAL LL F FFA AAN NN A AAC CCC CCE EES SSS SSO OOR RRI IIE EES SS A. Where indicated, fan shall be provided with the following optional accessories: • Disconnect switches – mounted, or mounted and wired • Variable pitch sheaves -NEMA 3R non-fused • Pre-fabricated roof curbs -NEMA 4X non-fused • 2” disposable filters, for filtered intake unit • Motors • Motor operated damper (supply or exhaust) - Explosion proof • Gra...
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