512-6634841_ HVAC Diagram.pdf

This document is an HVAC (Heating, Ventilation, and Air Conditioning) system diagram for a naval vessel, specifically prepared by the Department of the Navy's Naval Sea Systems Command in Washington, D.C. The diagrams depict detailed mechanical and ductwork layouts across multiple decks of the vessel, including the Bridge Deck, Upper Deck, Main Deck, Lower Deck, and Forecastle Deck, along with flat levels and hold plan configurations.

The document contains comprehensive symbols and abbreviations for HVAC components, including duct runs (down, up, and up/down), exhaust and supply terminals, diffusers, watertight closures, return vents, cooling coils, fans (axial and centrifugal), preheat units, thermostats, and manual fire dampers. General notes specify critical requirements: HVAC equipment locations are shown for clarity with terminal locations minimized; all ductwork must be securely supported to prevent vibration and injury; ductwork must be arranged to minimize noise; flexible joints connect ducts to equipment; ducting and equipment must be insulted and isolated; weather supply terminals must avoid intake from exhaust sources; ducts should be located above electrical equipment with watertight seals where required; rat-proofing follows USPS Publication No. 393; electric heaters comply with marine quality standards; adequate ceiling-height access is required for maintenance; laundry room tubler exhaust discharges into exhaust terminals; reheaters are controlled by room thermostats; and all ducts are fabricated from galvanized steel. This technical document serves as the design specification and construction guide for the vessel's complete HVAC system installation and operation.