Design and Construction Handbook - Los Angeles World Airports

Guide Specification
d. Axles: Minimum 1/2 inch diameter plated steel, hex-shaped, mechanically attached
to blade.
e. Mounting: Vertical.
f. Electric Actuator: 24 V, 60 Hz, modulating, with position feedback.
5. Digital Controller: Application specific controller. Programming logic and calibration in
nonvolatile EPROM. Controller uses generic 0 - 10 vdc inputs and outputs for interface
to building automation system.
6. Air Straightener Section: 3 inches deep section contained in 5 inch long sleeve attached
to damper-airflow monitor frame.
7. Finish: Mill aluminum.
D. Performance Data:
2.9 CONTROLS
1. Temperature Rating: Withstand -40 to 140
degrees F.
2. Accuracy: Plus or minus 5 percent.
3. Leakage: Maximum of 2.0 cfm per square foot at
1.0 inches wg pressure differential.
4. Measures from 15 percent to 100 percent of unit
nominal air flow.
5. Adjusts air flow for temperature variations.
6. Provides 2 to 10 volt DC signal corresponding to
actual air flow.
A. Coordinate with the Building Automation System for
the Terminal.
2.10 ELECTRICAL
A. Motor:
GUARANTEED MINIMUM FULL LOAD
EFFICIENCY OF MOTORS
Rated HP Nominal 1200 Nominal 1800
RPM
RPM
1 82.5 85.5
1.5 86.5 86.5
2 87.5 86.5
3 89.5 89.5
5 89.5 89.5
7.5 91.7 91.0
10 91.7 91.7
15 92.4 93.0
20 92.4 93.0
25 93.0 93.6
30 93.6 94.1
40 94.1 94.1
50 94.1 94.5
60 95.0 95.0
75 95.0 95.0
100 95.0 95.4
125 95.4 95.4
150 95.8 95.8
200 95.4 95.8
1. Enclosure Type: Totally enclosed, fan cooled.
2. Inverter duty, NEMA Premium (TM) efficient motors as defined in NEMA MG 1.
3. Motors must be “matched” with variable frequency drives.
B. Electrical Requirements
1. Where unit-mounted disconnects are provided, mount unit-mounted disconnect switches
on exterior of unit.
2. Variable Frequency Controllers shall be factory mounted in a ventilated compartment
which is part of the air handling unit and factory wired to motors and controls. Access
shall be through a louvered access door. The access door shall be flush with the outside
of unit.
CENTRAL-STATION AIR-HANDLING UNITS
23 74 13 - 8 Mechanical Systems