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MD ANDERSON Project No. XX-XXXX

MD ANDERSON PROJECT NAME

A/E Name

Issue Description

A/E Project No.

Month, 00, 0000

2.08

Air handling unit specialties

A.

Steam Grid Humidifiers:  Refer to Section 23 84 13.  If scheduled on the Drawings, the humidifier section shall be designed and constructed to meet the same criteria as the rest of the air handling unit sections. The humidifier section length shall be as specified on the Drawings.

B.

Variable Frequency Drives (VFD):  

1.

Refer to Section 23 05 13.

2.

Where indicated on Drawings, furnish as a part of the unit assembly, with drive matched to motor without noise or vibration over the entire operating range.

3.

All motors with VFDs shall be compatible with the VFD and tested at the factory.

4.

Drives shall be placed where shown on Drawings with support from floor if required.

[Note to engineer, schedule UV lights for recirculation AHUs only - not for 100% Outside AHUs]

C.

Ultra-Violet Germicidal Irradiation Systems  

1.

Where scheduled on the Drawings for recirculation/mixed air handling units only, provide factory installed Ultra Violet (UV) Germicidal Irradiation lamps.  Lamps shall provide a minimum irradiance of 9 Watts per square foot or 96.54 Joules per square meter at the cooling coil surface and at the coil leaving air temperature scheduled on the Drawings.

2.

UV lamps shall be located:

a.

Downstream of cooling coils.

b.

Above condensate drain pans.

c.

Up-stream of final filtration sections on blow-through units only.

3.

Lamps and ballasts shall be UL listed for application in air handling systems.

4.

Lighting systems shall be moisture resistant with electronic ballasts and shall be wired using moisture resistant conduit.

5.

UV lamps shall be capable of being switched on and off at the respective AHU section access door.

6.

Lamps shall be interlocked with access door position limit switches such that they are de-energize when the doors open.

7.

Lamps shall be installed on a stainless steel grid using stainless steel fasteners in accordance with the manufacturer’s installation instructions.

8.

Units with view port windows from which the lamps can be seen shall be labeled to warn of possible eye damage.

9.

Replacement lamps for UV systems shall be standard types which are not proprietary and are available from multiple sources.

The University of Texas

CUSTOM AIR HANDLING UNITS WITH FAN ARRAY SYSTEMS

MD Anderson Cancer Center

23 73 24

MS041113

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