MD ANDERSON Project No. XX-XXXX
MD ANDERSON PROJECT NAME
A/E Project No.
Month, 00, 0000
Coil casing reinforcements shall be furnished so that the unsupported casing length is not over 60 inches. Reinforcements shall be of the same material as coil casing.
Coils shall be individually removable by means of a coil rack. The coil support rack shall not be used to provide structural stability for the coil casing. Coil support racks for chilled water coils are to be made of Type 304 stainless steel materials. Coil support racks for hot water coils are to be made of A-36 carbon steel materials. The assembled carbon steel frames are to be coated with hot dipped galvanized material.
Coils shall be factory pre-piped and completely enclosed within the coil casing.
All penetrations of the coil casing shall be neatly sealed at the factory using a resilient sealant appropriate for the service temperature.
Access doors as specified herein shall be provided for each space between coils, filters, and other components.
Chilled and Hot Water Coils:
Water coil capacities, pressure drops and selection procedures shall be certified for the capacity scheduled in accordance with ARI Standard 410-87. Non-certified coils will not be accepted. The cooling coil face air velocity shall not exceed the velocities scheduled on the Drawings. Water velocity through the tubes shall be not less than 4 and no greater than 6 feet per second.
Maximum water pressure drop through a coil shall not exceed 20 feet at the scheduled water flow rate on the Drawings. Coils piped in series shall not exceed 30 feet at the scheduled water flow rate on the Drawings.
Chilled 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 a minimum wall thickness 0.035-inch with copper fins permanently bonded to the tubes by mechanical expansion.
Chilled water coils scheduled as copper finned 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, with a separate access section between the coils. The coils shall be piped in series, counterflow to the direction of airflow. Copper fins on plate coils shall be 0.006 inch thick minimum thickness.
Chilled water coils scheduled as aluminum finned shall have a maximum of nine (9) fins per inch and a maximum of six (6) rows. If additional capacity is necessary, provide an additional coil, with a separate access section between the coils. The coils shall be piped in series, counterflow to the direction of airflow. Aluminum fins on plate coils shall be 0.075 inch thick.
The University of Texas
CUSTOM AIR HANDLING UNITS WITH FAN ARRAY SYSTEMS
MD Anderson Cancer Center
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