MD ANDERSON Project No. XX-XXXX
MD ANDERSON PROJECT NAME
A/E Project No.
Month, 00, 0000
The manufacturer has the responsibility to transport sections to the Project Site and to supervise reassembling the sections together for all air handlers. Unload and hoist the sections onto the designated floor space.
Reassemble the sections together for all air handlers in their footprint under the direction of the manufacturer.
Additional unit section or component splits required for installation during construction shall be the responsibility of the manufacturer without additional cost to the Owner.
Units must be bolted together for reassembly. Drive screw construction at unit splits is unacceptable.
All internal coil piping shall be extended to casing walls.
The unit manufacturer shall provide a written acceptance letter to MD Anderson stating the unit was assembled and complies with manufacturer’s assembly requirements.
Support coil sections independent of piping on steel channel or double angle frames and secure to casings. Provide frames for maximum three coil sections. Arrange supports to avoid piercing drain pains. Provide airtight seal between coil and duct or casing.
Protect coils to prevent damage to fins and flanges. Comb out bent fins.
Install cleanable tube coils with 1:50 pitch.
Make connections to coils with unions and flanges.
On water coils, provide shut-off valve on supply line and lockshield balancing valve on return line. Balance valves are not required on main return from coil banks if pressure independent control valves are being used to meter water flow through the coil(s) Locate water supply at bottom of supply header and return water connection at top. Provide manual air vents at high points. Ensure water coils are drainable and provide drain connection at low points.
On water heating coils and chilled water-cooling coils, connect water supply to leaving airside of coil (counterflow arrangement).
In steam coils, install vacuum breaker in steam line at header. Install steam traps with outlet minimum 12 inches below coil return connection. Install dirt leg in steam supply.
Insulate headers located outside airflow as specified for piping. Refer to Section 20 07 19.
Ensure sufficient space between coil sections for installation of control devices.
Units with cabinet mounted fans shall be tested and certified at rated conditions using AMCA test procedures with fan mounted in the cabinet. Bare fan data will not be accepted.
With unit set in place, leveled and ready to receive ductwork connections, unit shall be tested for casing leakage by sealing all openings and pressurizing to 2 inches w.g. above unit rating or the rating of attached ductwork or a maximum of 12 inches w.g. Maximum allowable leakage rate is 1 percent of design airflow.
The University of Texas
CUSTOM AIR HANDLING UNITS WITH FAN ARRAY SYSTEMS
MD Anderson Cancer Center
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