Guide Specifications:

Single Duct  VAV Terminal Unit
HVAC Guide Specifications
Size Range: 90 to 7100 Nominal CFM
Carrier Model Number:
35EC  (Product Integrated Controls [PIC],Carrier CCN)

Part 1 - General

1.01	DELIVERY AND STORAGE:
Units shall be stored and handled per manufacturer's recommendations.

1.02 QUALITY ASSURANCE:
A.	Insulation shall meet NFPA-90A requirements for flame spread and smoke generation and UL-181 requirements for anti-erosion, corrosion and fungus properties.
B.	Hot water coils, when specified, shall be tested for leakage at 250 psig with the coil submerged in water.
C.	Electric heating coils, when specified shall be UL or ETL listed and designed to comply with UL Standard 1096.
D.	Sound power levels shall be ARI certified in accordance with the requirements of ARI-880-98.

1.03 DELIVERY AND STORAGE:
Units shall be stored and handled per manufacturer's recommendations.

Part 2 – Products

2.01 Equipment

A.	General:
Factory-assembled, externally powered, variable air volume control terminal. Unit shall be complete with a damper assembly, flow sensor, externally mounted volume controller, collars for duct connection and all required features. Control box shall be clearly marked with an identification label that lists such information as nominal cfm, maximum and minimum factory-set airflow limits, coil type and coil hand, where applicable

B.	Unit Cabinet:
1.	Constructed of 22-gage (20 gage optional) galvanized steel with round or rectangular inlet collar and rectangular discharge with slip and drive connection. All primary air inlet collars shall accommodate standard flex duct sizes
2.	Insulated with ½ in. thick, 1.5-lb. equivalent density mat-faced insulation that meets the requirements of UL181 and NFPA-90A.
a 23% perforated internal sheetmetal cover extending over the fiberglass insulation, as well as covering the liner cut edges.

C.	Damper Assembly:
The control air damper assembly shall be constructed of heavy gauge galvanized steel with solid shaft rotating in Delrin® bearings. Damper shaft shall be marked on the end to indicate damper position. Damper blade shall incorporate a flexible gasket for tight airflow shutoff and operate over a full 90°.

D.	Controls:
Units shall have pressure-independent communicating controls, as specified, capable of maintaining required airflow setpoints +/-5% of the unit's capacity at any inlet pressure up to 6-in. wg. The controllers shall be capable of resetting between factory or field-set maximum and minimum (>350 fpm inlet duct velocity) set points to satisfy the room thermostat demand.
The unit shall be equipped with an amplified linear averaging flow probe located horizontally across the inlet. The sensor will provide a differential pressure signal amplified to equal 3 times the velocity pressure with an accuracy of at least +/-10% throughout the range of 350 to 2600 fpm inlet duct velocity, depending on the controller employed. 

E.	Accessories:
 
1.	Electric Heating Coil:
Electric coils shall be supplied by the terminal unit manufacturer and shall be UL listed. Construct coil casing with minimum of 20-gage zinc coated steel. Elements shall be nickel chrome and supported by ceramic isolators. The integral control panel shall be housed in a NEMA 1 enclosure, with hinged access door for access to all controls and safety devices. Electric coils shall contain a primary automatic reset thermal cutout and differential pressure airflow switch for proof of airflow.  Heaters shall be: 
a.	Designed for the capacity, electrical characteristics and steps of control as shown on the equipment schedule
b.	Open coil construction with 80% nickel, 20% chromium wire supported in free-floating ceramic bushings. Coil frame shall be constructed of corrosion resistant steel.
c.	Factory wired and include all limit switches