266_pdfsam_2.3- mechanical, hvac & plumbing specification novotel

Gulf House Engineering January 2010 07-C106 NOVOTEL AL DANA RESORT TOWERS PAGE 264 SECTION 15850 AIR HANDLING UNITS Duct collars shall be provided where ducted connection is required. Th e con d ensa t e t r ay lo ca t ed un d er t h e co il sh al l b e of one p ie ce constru ct io n an d shall have sufficient slope for positive and efficient drainage of condensate under all conditions. The trays shall be of 1.2 mm (minimum) hot dipped galvanized steel sheet and adequately insulated with fire retardant thermal insulation. Coils shall be of aluminium fins mechanically bonded to seamless copper tubes and tested w ith com press ed air up to 20 00 kPa under water. F ace velocity through coils shall not exceed 2.25 m/s to prevent moisture carries over.The number of fins shall not exceed 400 per meter and all fins shall be continuous. Coils shall be three rows unless indicated otherwise and be provided with air vents at high points, with drain lines extended to drain pan. The capacity of the coil shall be based on 6.5 deg C chilled water entering temperature with a tem perature difference of 5+_ 1 deg. C . Coil connections shall be female threaded and compatible with steel pipe connection. Unit shall be internally insulated with minimum 25 mm, 32 kg/cubic meter density thermal and acoustic insulation. Filter shall be aluminium washable type, 50 mm thickness. EXECUTION INSTALLATION Install unit as per manufacturer’s instruction. FAN COIL UNIT EXPOSE TYPE Th e Fan Coil Unit shall be t he fa ct or y assembled decor at ive t ype, in t egral f an t ype with chilled water-cooling coil and shall be made for exposed mounting. The unit shall be complete with decorative grill. Th e Fan Coil Unit shall be o f t he fac t or y assembled, in t eg r al f an type w it h chilled water-cooling coil and shall be made with concealed mounting. The capacities of the FCU will be as per the enclosed schedule. And also the unit should have access panel in the lower part of the unit to facilitate all routine maintenance operation. The FCU shell also have washable filter, filter shall be 15mm permanent cleaning aluminum mesh and the drain pan shall be integral and an auxiliary drain pan shall be provided to cover the valve package. Units shall be ARI rated. Air Filters: Shall be accessible by dropping down bott om panel of the filter back. Filter shall be 15mm permanent, clearable aluminum mesh. Valves: The control valve and piping package shall be factory built, installed and tested. Each fan coil units shall be provided at least with one isolating and one balancing valve at outlet and one isolating at inlet.

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Page 1: 266_pdfsam_2.3- Mechanical, HVAC & Plumbing Specification Novotel

Gulf House EngineeringJanuary 2010

07-C106 NOVOTEL AL DANA RESORT TOWERS PAGE264 SECTION 15850 AIR HANDLING UNITS

Duct collars shall be provided where ducted connection is required.

The condensate tray located under the coil shall be of one piece construction andshall have sufficient slope for positive and efficient drainage of condensate underall conditions. The trays shall be of 1.2 mm (minimum) hot dipped galvanizedsteel sheet and adequately insulated with fire retardant thermal insulation.

Coils shall be of aluminium fins mechanically bonded to seamless copper tubesand tested with compressed air up to 2000 kPa under water. Face velocitythrough coils shall not exceed 2.25 m/s to prevent moisture carries over.Thenumber of fins shall not exceed 400 per meter and all fins shall be continuous.Coils shall be three rows unless indicated otherwise and be provided with airvents at high points, with drain lines extended to drain pan. The capacity of thecoil shall be based on 6.5 deg C chilled water entering temperature with atemperature difference of 5+_ 1 deg. C.

Coil connections shall be female threaded and compatible with steel pipeconnection.

Unit shall be internally insulated with minimum 25 mm, 32 kg/cubic meter densitythermal and acoustic insulation.

Filter shall be aluminium washable type, 50 mm thickness.

EXECUTION

INSTALLATION

Install unit as per manufacturer’s instruction.

FAN COIL UNIT EXPOSE TYPE

The Fan Coil Unit shall be the factory assembled decorative type, integral fan typewith chilled water-cooling coil and shall be made for exposed mounting. The unitshall be complete with decorative grill.

The Fan Coil Unit shall be of the factory assembled, integral fan type with chilledwater-cooling coil and shall be made with concealed mounting. The capacities of the FCU will be as per the enclosed schedule. And also the unit should haveaccess panel in the lower part of the unit to facilitate all routine maintenanceoperation. The FCU shell also have washable filter, filter shall be 15mmpermanent cleaning aluminum mesh and the drain pan shall be integral and anauxiliary drain pan shall be provided to cover the valve package.

Units shall be ARI rated.

Air Filters: Shall be accessible by dropping down bottom panel of the filter back.Filter shall be 15mm permanent, clearable aluminum mesh.

Valves: The control valve and piping package shall be factory built, installed andtested. Each fan coil units shall be provided at least with one isolating and onebalancing valve at outlet and one isolating at inlet.