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 Pressure Independent VAV Terminal Unit  A to Z Products
 Introduction
 
COSMOS make single duct air terminals are designed to regulate the flow of conditioned air in single duct air distribution system. Air terminals include; Basic air terminal, Air terminal with sound attenuator, Air terminal with hot water reheat coil, Air terminal with electric heater and Bypass air terminal.

Terminals are available with wide range of standard control sequence and work equally well in constant volume and variable volume system.

Cosmos terminal units consist of a casing with a circular inlet spigot, a rectangular outlet connection with integral noise reduction of opencell nitrile foam rubber, a damper blade for air volume control and a cross-flow differential pressure sensor for measuring air volume.

Air terminals are available for both system pressure independent and pressure dependent applications, depending on the control sequence selected. Terminal units are recommended for use in duct systems with static pressure up to 3” water gauge. Supply air capacities are ranges from 45 CFM to 7100 CFM, depending on air terminal size.

Air terminal units are supplied with electric or electronic controls from all major control manufacturers.

AHRI CERTIFIED RATINGS - click here
 
  Single Duct Terminal Units
 
Model: VAV‐PID

Basic terminal unit supplied with round inlet collar, a rectangular discharge outlet, and an externally mounted control mounting panel.
   
Model: VAV‐PID‐SL

Acoustically lined silencer is designed to further reduce discharge sound levels from the air terminal.
   
Model: VAV‐BP

Bypass terminal unit is a single duct pressure dependent air terminal unit, designed for use with constant volume flow and medium pressure packaged air handling systems roof top air conditioning units.
   
Model: VAV‐PID‐EH

Electric heater is enclosed in an air terminal box which is attached to the air terminal discharge outlet.
   
Model: VAV‐PID‐WH

Air terminal with hot water reheat coil is shipped as the integral part of an elongated air terminal casing.
 
  Basic Features
 
Cosmos VAV terminal, features a primary inlet with an integral damper and a discharge plenum. It is lined with insulation to provide sound absorption and thermal resistance, It is designed to meet the needs of today's VAV systems.
 
 Operating Principle
 
The VAV - PI is the most common air terminal unit offered by “COSMOS”. It operates on the principle that as cooling load is satisfied, the primary damper modulates closed to restrict airflow to the space so that a constant space temperature is maintained. As the space cooling load is further satisfied, the VAV - PI closes to a pre-set minimum flow which is usually determined by the minimum level of ventilation required in the space. In addition, the VAV - PI can also be used at full shut-off for those applications where minimum ventilation requirements are not necessary. Upon call for heat the damper shuts down to minimum.
 
  Features
   
Precisely design flow sensor grid.
A wide variety of sizes (10) results in a total flow range of 45 to 7100 cfm.
Heavy duty 22 gauge casing construction.
Industry standard round inlet collars sized to accept either flexible or rigid duct.
Internally lined casing utilizing opencell elastomeric nitrile foam rubber, fiberfree, supersilent & microban resistant.
Round damper blade constructed of elastomeric gasket sandwiched between two heavy-duty 22 gauge galvanized steel plates, resulting in low-air leakage.
Shaft with Delrin bearings. Shaft features a position indicator for easy identification of damper angle.
25mm flange connection on the discharge plenum.
 
  Sound
 
The goal in designing VAV systems is to operate air terminals at low pressures and airflows, while still satisfying the design conditions. The VAV - PI is designed for quiet performance at typical operating conditions. However for those critical sound applications, an integral sound attenuator is offered as an option (VAV- PI SL)
 
  Options
 
Cosmos VAV can be furnished without controls, with electronic analog controls, with factory-mounted direct digital controls (Siemens / Delta or equivalent).
 
Integral discharge sound attenuator.
 
Hanger brackets for ½" threaded rod support.
 Features
 
19" rack mountable or table top version Front and rear screw less
Single depth extrusions with decorative grooves Optimised usable height for 1u and 2u subracks
Softline with minmum screws    
 
 Construction
 
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Legs - plastic
 
 Compliance
 
IEC 297 and DIN41494
IEEE 1101.10 / 11
IEC 297 and DIN41494
IEEE 1101.10 / 11
 Products
 
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Legs - plastic
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Legs - plastic
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
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