MD ANDERSON Project No. XX-XXXX
MD ANDERSON PROJECT NAME
A/E Project No.
Month, 00, 0000
Coils shall have a maximum of eight (8) fins per inch and a maximum of six (6) rows. If additional capacity is necessary, provide an additional coil bank with a separate access section between the coils. The coils shall be piped in series, counter flow to the direction of airflow.
Hot Water Coils:
Extended surface type meeting all conditions and having the minimum face area and pressure drops scheduled on the Drawings. Same‑end supply and return connections unless otherwise indicated.
Coils shall be constructed of copper tubes 5/8-inch diameter with 0.025-inch thick minimum wall thickness and aluminum fins permanently bonded to the tubes by mechanical expansion. Aluminum fin thickness shall be 0.075 inches. If the hot water coil used to pre-heat outside air freeze protection the copper tube wall thickness shall be 0.035 inches.
Coil headers and connections shall be of I.P.S. brass or heavy gage seamless hard drawn copper tubing with penetrations for connection of core tubing by die‑formed intrusion process with resulting contact depth between the header wall and core tubing of not less than 0.090 inches. Joints between core tubing and header shall be of recess swage design to allow a large mating area for build-up of brazing materials to give increased strength to the joint. Supply and return connection of brass or copper shall be terminated with brass flange connections
Each coil section shall be provided with a Type 304 stainless steel frame/casing, including tube sheets, minimum 16-gage. Frame members shall extend over the ends and edges of the coils and shall be constructed with formed holes for tubes, permitting free expansion and contraction of coil sections while supported by an extended surface of the frame. Intermediate tube support sheets of Type 304 stainless steel shall be provided in all coils having tube lengths in excess of 48 inches. On long coil sections the spacing of coil supports shall not exceed 48 inches. All intermediate supports shall be welded to coil frame members and fabricated with formed tube holes to support the penetrating tubes.
Coils shall be leak tested with air pressure under water at 325 psig, and shall be designed for operation at pressures indicated on the Drawings. Maximum working pressure classification is 300 psig. Submit certification of leak test and certification that coils are suitable for testing at pressures of 450 psig at 100 degrees F. Provide stainless steel nameplate on each coil indicating: manufacturer, model number, coil designation, coil medium, coil test pressure, coil maximum operating temperature and pressure.
Steam Coils [where scheduled on the Drawings]:
All steam coils shall be steam-distributing non-freeze type:
Outer tube 1-inch outside diameter seamless copper outer tubes having 0.035-inch minimum wall thickness.
Inner tube shall be 5/8-inch outside diameter seamless copper tubes having 0.025-inch minimum wall thickness.
The University of Texas
CUSTOM AIR HANDLING UNITS WITH FAN ARRAY SYSTEMS
MD Anderson Cancer Center
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