7/28/2019 283_pdfsam_2.3- Mechanical, HVAC & Plumbing Specification Novotel

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Gulf House EngineeringJanuary 2010

07-C106 NOVOTEL AL DANA RESORT TOWERS PAGE 281 SECTION 15865 FANS

2.5 Domestic Ventilators

Domestic ventilators include small capacity, low-noise fans of, ceiling-mount, ductfans, compact size axial and mini-sirocco type.

Provide high-performance blades, totally enclosed powerful condenser motor,

automatic oil circulation system, automatic shutters, decorative louvers, turbo fan,and all required accessories.

Electrical characteristics shall be single phase.

PART 3 - EXECUTION

3.1 Installation

Install fans in accordance with manufacturer’s recommendations and as knownon the Drawings. Follow SMACNA and AMCA recommended procedures for faninstallations, belt guards, duct connections, etc.

Provide flexible connections as described in specification Section 15910Ductwork Accessories to provide sufficient separation of ductwork from fanassembly to prevent metal-to-metal contact.

Unless noted otherwise, provide discharge direction and drive arrangement to suitspace conditions and conform as closely as possible to the layouts shown on theDrawings. Deviations from overall dimensions of specified fans will not beaccepted without written permission. Confirm before ordering, that equipment canbe accommodated within space provided, indicating allowance for requiredservice clearances.

Wherever required provide fans that are quiet operating and non-overloading overthe entire range of operation.

Provide fan motors, starters, and controllers in accordance with Section 16090and 16100 – Motors, Starters, and Control Centres. Size motors to drive itsrespective fan when the fan is operating at a speed 5% in excess of that requiredto meet the scheduled fan performance. Do not select motors within the servicefactor for this range.

Statically and dynamically balance fan wheels/impellers at the factory and certify

balance.

Provide precision self-aligning bearings manufactured to prevent leakage of oil orgrease. Provide cups, oil chambers, lubrication fittings in accessible locations forease of lubrication. Provide heavy duty split pillow block bearings with tapered,double-row spherical roller assemblies. Provide bearings with AFBMA L-50service life in excess of 200,000 hours at maximum catalogued fan operatingconditions unless noted otherwise.

Provide copper lubrication leads, for lubrication of internal motors and bearings,extending to a capped termination point external to the fan casing.

Extend wire leads on fans driven by direct motor drive from the motor junction boxin air tight rigid walled conduit, to a junction box mounted external to the fancasing.