HomeMy WebLinkAboutB14-0240_2014-130.233600 Air Terminal Units_1411771260.pdf CCD-2 18 SEPTEMBER 2014
SECTION 233600 -AIR TERMINAL UNITS
PART 1 - GENERAL
1.1 DESCRIPTION OF WORK:
A. Extent of air terminals work required by this section is indicated on drawings and schedules,
and by requirements of this section.
B. Types of air terminals specified in this section include the following:
1. Central Air Terminals
a. Reheat
C. Refer to other Division 23 sections for related work in addition to the requirements of this
section.
D. Refer to Division-26 sections for the following work; not work of this section.
1. Power supply wiring from power source to power connection on air terminals. Include
disconnects, and required electrical devices, except where specified as furnished, or
factory-installed, by manufacturer.
E. Provide the following electrical work as work of this section, complying with requirements of
Division-26 sections:
1. Control wiring between field-installed controls and air terminals.
a. Control wiring specified as work of Division-23 for Automatic Temperature Controls
is work of that section.
1.2 QUALITY ASSURANCE:
A. Manufacturer's Qualifications: Firms regularly engaged in manufacturer of air terminals with
characteristics, sizes, and capacities required, whose products have been in satisfactory use in
similar service for not less than 5 years.
B. Codes and Standards:
1. ADC Compliance: Provide air terminals, which have been tested and rated in
accordance with ADC standards, and bear ADC Seal.
2. ARI Compliance: Provide air terminals, which have been tested and rated in accordance
with ARI 880 "Industry Standard for Air Terminals" and bear ARI certification seal. Hot
water coils shall be tested and rated in accordance with ARI Standard 410.
3. NFPA Compliance: Construct air terminals using acoustical and thermal insulations
complying with NFPA 90A"Air Conditioning and Ventilating Systems".
1.3 SUBMITTALS:
A. 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, model number, size, and accessories furnished; and installation and
start-up instructions.
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B. Shop Drawings: Submit manufacturer's assembly-type shop drawings indicating dimensions,
weight loadings, required clearances, and methods of assembly of components.
C. Wiring Diagrams: Submit ladder-type wiring diagrams for electric power and control
components, clearly indicating required field electrical connections.
D. Record Drawings: At project closeout, submit record drawings of installed systems products, in
accordance with requirements of Division 23.
E. Maintenance Data: Submit maintenance data and parts list for each type of air terminal;
including "trouble-shooting" maintenance guide. Include this data, product data, shop drawings,
and maintenance data in maintenance manual; in accordance with requirements of Division 23.
1.4 DELIVERY, STORAGE, AND HANDLING:
A. Deliver air terminals wrapped in factory-fabricated fiberboard type containers. Identify on
outside of container type of air terminal and location to be installed. Avoid crushing or bending
and prevent dirt and debris from entering and settling in boxes.
B. Store air terminals 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.
PART 2 - PRODUCTS
2.1 MANUFACTURERS:
A. Manufacturer: Subject to compliance with requirements, provide products by one of the
following:
1. Air Terminals:
a. Titus Products Div.; Philips Industries, Inc.
b. Anemostat Products Div.; Dynamics Corp. of America.
c. Price
d. Carrier Corp.; Sub. of United Technologies Corp.
e. Trane (The) Co.
f. Metal-Aire
g. Krueger
2.2 AIR TERMINALS:
A. General: Provide factory-fabricated and tested air terminals as indicated, selected with
performance characteristics which match or exceed those indicated on schedule.
B. Air terminal units shall be low pressure drop, single duct throttling type pressure independent
and suitable for use in medium pressure variable volume air distribution systems.
C. Casing shall be minimum 22 gauge galvanized steel construction with internal acoustical coated
1/2"thick, 1-1/2 lb. density fiberglass insulation and inlet and outlet duct connections. Provide
gasketed and insulated access doors for air terminals with internally mounted serviceable
components, including actuators and fan motors.
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1. Casing shall be insulated with %", 1-1/2 lb. reinforced foil faced insulation. All edges shall
be folded and tucked or protected by sheet metal nosing to isolate all glass fibers from
the air stream.
D. Internal damper blade shall be extruded aluminum or 18 gauge steel with keyed fit shaft and
nylon bushing. Damper shall seal against gasketed stops maximum 2% leakage at 3.0" S.P.
All mechanical parts shall be galvanized or non-ferrous. Alternate damper design as produced
by the Trane Company as acceptable.
E. Hot water heating coils shall be designed for 200 psig maximum working pressure and 200
degrees F maximum operating temperature. Coil shall be serpentine-type, constructed of 1/2"
O.D. copper tubes mechanically bonded to aluminum fins; galvanized steel casing.
F. Provide between terminal casing and reheat coil, a factory-installed framed duct access door
complete with quarter-turn quick release fasteners.
G. Provide label on each air terminal unit, indicating plan designation, unit size, cfm range and
settings and calibration curve.
H. Provide a pressure independent pneumatic cross or ring-shaped flow sensor with velocity
pressure pickup points for measuring inlet airflow. The sensor shall maintain control accuracy
with the same size inlet duct in any configuration. Single point hot wire anemometer or straight
line pneumatic sensors are not acceptable. Provide gauge ports in flow sensor tubing.
2.3 CONTROLS:
A. Air terminal unit manufacturer shall mount DDC controller and electric actuator provided by
temperature control manufacturer. See Section 23 09 33/23 09 93.
B. Control devices shall be factory set and calibrated for operation with direct acting room
thermostat.
C. The terminal control damper shall be factory set to fail to an open position in case of a loss of
control air pressure.
D. Coordinate spring range P/E settings and control action with devices provided under section 23
09 43 and Sequence of Control specified in section 23 09 93.
PART 3 - EXECUTION
3.1 INSPECTION:
A. Examine areas and conditions under which air terminals are to be installed. Do not proceed
with work until unsatisfactory conditions have been corrected.
3.2 COORDINATION:
A. The contractor is responsible for determining the position of controls, actuators, and access.
Coordinate each air terminal's position with building elements, piping, conduit, ductwork and
other items, order left/right hand units as required and inform all other trades as required.
Relocate interfering items or terminal as required to provide proper access if not coordinated
beforehand.
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3.3 INSTALLATION OF AIR TERMINALS:
A. General: Install air terminals as indicated, and in accordance with manufacturer's installation
instructions.
B. Location: Install each unit level and accurately in position indicated in relation to other work;
and maintain sufficient clearance for normal service and maintenance, but in no case less than
that recommended by manufacturer.
C. Duct Connections: Connect ductwork to air terminals in accordance with Division-23 ductwork
sections.
3.4 FIELD QUALITY CONTROL:
A. Upon completion of installation and prior to initial operation, test and demonstrate that air
terminals, and duct connections to air terminals, are leak-tight.
B. Repair or replace air terminals and duct connections as required to eliminate leaks, and retest
to demonstrate compliance.
3.5 CLEANING:
A. Clean exposed factory-finished surfaces. Repair any marred or scratched surfaces with
manufacturers touch-up paint.
3.6 BALANCING:
A. See Section 23 05 93. Balancing contractor shall set all air quantity limits, and shall not rely on
any factory calibration. Report air quantity as measured by the air terminals velocity pressure
pick up, in addition to pitot traverses and outlet readings.
END OF SECTION 233600
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