SECTION 15933 – AIR TERMINAL VOLUME DAMPERS
CONSTRUCTION STANDARD___________________________________________
PART 1 - GENERAL
1.01
Purpose:
A.
1.02
1.03
Description Of Work:
A.
Extent of air terminal volume dampers work required by this section is indicated
on drawings and schedules, and by requirements of this section. They will be used
as single inlet variable volume terminal or as dual inlet variable volume in
conjunction with lateral tee mixing sections.
B.
Refer to other Division-15 sections for medium pressure ductwork for
construction of terminal devices and lateral mixing tee sections.
C.
Refer to other Division-15 sections for temperature controls for air terminals; not
work of this section.
Quality Assurance:
A.
1.04
Manufacturer's Qualifications: Firms regularly engaged in manufacture of air
terminal volume dampers with characteristics, sizes, and capacities required,
whose products have been in satisfactory use in similar service for not less than 5
years.
Submittals:
A.
1.05
This design guideline contained here in includes the requirements for air handler
casings at The University of Texas at Austin. It is the intent to provide the
highest level of quality and standardization possible.
Product Data:
Submit manufacturer's technical product data, including
performance data for each size and type of air terminal furnished; schedule
showing drawing designation, room location, number furnished, and size.
Delivery, Storage, And Handling:
A.
Deliver air terminal volume dampers wrapped in factory-fabricated fiberboard
type containers. Identify on outside of container size of air terminal volume
damper. Avoid crushing or bending and prevent dirt and debris from entering and
settling in boxes.
B.
Store air terminal volume dampers in original cartons and protect from weather
and construction work traffic. Where possible, store indoors; when necessary to
store outdoors, store above grade and enclose with waterproof wrapping.
Construction Standards, Revised May 6, 2002
15933-1
SECTION 15933 – AIR TERMINAL VOLUME DAMPERS
CONSTRUCTION STANDARD___________________________________________
PART 2 - PRODUCTS
2.01
Acceptable Manufacturers:
A.
Manufacturer: Subject to compliance with requirements, provide air terminal
volume dampers of one of the following:
1.
2.
3.
4.
2.02
Krueger Mfg. Co.
Nailor-Hart
Ruskin Mfg. Co.
Titus Products Div.; Philips Industries, Inc.
Air Terminal Volume Dampers: Single Inlet And Dual Inlet Variable Volume:
A.
Casings: Construct of 18 ga. galvanized sheet metal, sized with female
connections each end.
B.
Air Dampers: Construct of materials that cannot corrode, do not require
lubrication, nor require periodic servicing.
C.
The damper blades shall be 16 ga. cold rolled, galvanized steel and shall be
through bolted to the damper shafts to assure no slippage of the blades.
D.
The damper shafts shall be round and operate in rustproof self-lubricating
bearings (not plastic). The end of the shaft at the operator end shall be scored in
line with the damper blade to reference the damper blade position.
E.
The pneumatic actuators shall be furnished, mounted and adjusted by the terminal
volume damper manufacturer. The pneumatic actuators shall be selected to
operate with a 20-psi main air supply. The actuators shall be of the pneumatic
piston-type with rolling diaphragm and metal body. Each operator shall be fully
proportional-type to operate under normal operating conditions to guarantee
closure to the position set on the linkage by the terminal unit assembly
manufacturer. The pneumatic actuators shall be Johnson Model No. D-3062. The
pneumatic actuators shall be Johnson Model D-3062, with a spring range of 9-13
psi.
F.
Dampers shall be equal to Naylor-Hart Model No. 1091-UT.
G.
Electric actuators shall be furnished, mounted and adjusted by the BAS
contractor. Terminal volume damper manufacture shall provide mounting base on
terminal unit for mounting of actuator. Actuator shall be sized for specific
application with a minimum torque of 40 in-lb. and shall utilize brushless motor.
Housing shall be designed for reversing rotation direction and shall have a selfcentering shaft coupling. Actuator shall be proportional control, 0-10V, spring
return with maximum run time of 150 seconds and spring return time of less than
60 seconds. Maximum power draw of actuator shall be 10VA. All actuators
installed throughout project shall be of the same manufacturer and model. Protect
actuators from construction debris from time delivered to project, throughout
construction and uRichEditWindow
Construction Standards, Revised May 6, 2002
15933-2
SECTION 15933 – AIR TERMINAL VOLUME DAMPERS
CONSTRUCTION STANDARD___________________________________________
H.
PART 3
3.01
Until Owner accepts building. Damaged or non-operational actuators shall be
replaced at no cost to the Owner. Electric actuators shall be "Siemens OpenAir
Actuator GMA161”. Provide five-year parts and labor warranty on electric
actuators. Warranty shall begin with final acceptance by Owner. All actuators
shall be dated with day powered up.
EXECUTION
Installation Of Air Terminal Volume Dampers:
A.
General: Install air terminal volume dampers as indicated, allow room for
servicing the actuator and linkage. The manual-balancing damper shall be
installed upstream 4 diameters distant and the manual damper shaft shall be at
right angle to the air terminal volume damper.
B.
Actuators: Actuators shall be mounted on channel bracket with a minimum of
four set mounting screws.
END OF STANDARD 15933
Construction Standards, Revised May 6, 2002
15933-3