15815-2
AIR TERMINAL BOXES
(Electric)". All air terminal units shall be brand new products of the same
manufacturer.
B. Capacity and Performance: The maximum capacity of a single terminal unit shall
not exceed the capacity as indicated on the mechanical schedule.
C. Sound Power Levels: Acoustic performance of the air terminal units shall not
exceed levels as indicated on the mechanical schedule.
D. Casing: Unit casing shall be constructed of galvanized steel no lighter than 22
gauge. Assembled with longitudinal lock seam construction. Provide hanger
brackets for attachment of supports.
1. | Fiber-Free Foam Insulation: Complying with UL 181 erosion, mold growth
and humidity requirements in accordance with ASHRAE Std. 62.1, and
having a maximum flame/smoke spread of 25/50 for both the insulation and
the adhesive, when tested in accordance with ASTM E84. Secure insulation
with adhesive. 1 inch thick, R-value of 4.0.
2. Access panels (or doors): Provide panels large enough for inspection,
adjustment and maintenance without disconnecting ducts, even if there are no
moving parts. Panels shall be insulated to same standards as the rest of the
casing and shall be secured and gasketed airtight. It shall require no tool other
than a screwdriver or socket wrench to remove.
3. Total leakage from casing: Not to exceed 2 percent of the nominal capacity of
the unit when subjected to a static pressure of 3 inch WG, with all outlets
sealed shut and inlets fully open.
E. Construct dampers and other internal devices of corrosion resisting materials which
do not require lubrication or other periodic maintenance.
1. Damper Leakage: Not greater than 2 percent of maximum rated capacity,
when closed against inlet static pressure of 4 inch WG.
F. Provide multi-point velocity pressure sensors with external pressure taps.
1. Provide direct reading air flow rate table pasted to box.
G. Provide static pressure tubes.
H. Factory furnished and installed, externally powered, standalone digital variable air
volume controller and damper actuator.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Install in strict accordance with the manufacturer's instructions and
recommendations and as shown on the Drawings.
B. Install in accordance with manufacturer's instructions and recommendations.
3.2 ADJUSTING
A. Balance air terminal unit to provide scheduled airflow at maximum operating
efficiency in accordance with specification section 15907, "Testing, Adjusting and
Balancing". Submit a report indicating the results to the Engineer for review.
END OF SECTION
13089K
