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Aldes patented Zone Register Terminal (ZRT-S) are designed to introduce flexibility and demand control to central ventilation systems. The multi-zone ZRT® regulates ventilation without need for individual fans. Each ZRT-S is a combination grille, register box, control damper, and optional flow regulator(s). This unique combination provides up to four different control schemes without the need for expensive pneumatic, electronic, or DDC control systems. To ensure the proper calibration of the damper assembly, do not exceed 1.0 in. w.g. (250 Pa) of differential pressure across the damper door.

When used in central systems, the ZRT-1 model provides on-off control for on-demand ventilation. This allows fan downsizing and promotes energy savings by minimizing necessary fan horsepower and ventilation-induced heating and cooling loads on the building. The optional Constant Airflow Regulator (CAR3) can be installed in the ZRT-1’s extended duct collar to place a maximum flow limit on each terminal when activated. The automatic operation of the CAR3 will provide precise balancing to each terminal, compensating for intermittent use of other ZRTs around the building, as well as factors like stack-effect.

The ZRT-2 model is used for combination low-flow continuous indoor air quality ventilation and on-demand high-flow spot ventilation using the same central fan system. This is achieved by integrating a minimum Constant Airflow Regulator (CAR3) directly into the damper assembly. When the ZRT-2 is powered on, the control damper powers open, bypassing the low-flow CAR3 to allow the boost ventilation rate set by the maximum flow CAR3 (when equipped).
Unit of Measure

Specifications

Type

 N/A Zone Register Terminal - Supply

Application

 N/A Supply

Series

 N/A With Minimum Flow Control

Grille Size

 N/A 8 x 8 in

Collar Diameter

 N/A 4 in

Voltage

 N/A 24 V

Frequency

 N/A 60 Hz

Maximum Flow Control

 N/A With Maximum Flow Control

Minimum Airflow Regulation

 N/A Low Regulated

Maximum Airflow Regulation

 N/A Regulated

Minimum Airflow Range

 N/A 15 to 85 cfm

Maximum Airflow Range

 N/A 15 to 85 cfm

Features

N/A

  • Provides on-off control for on-demand ventilation.
  • Combination low-flow continuous ventilation and on-demand high-flow spot ventilation using the same central fan system (ZRT-2).
  • All access for service through grille; no additional access panel required.

Applications

N/A

  • Occupancy-based control systems for hotels, dormitories and high-rise residential.
  • Large and small commerical systems.
  • Intermittent ventilation for bathrooms and kitchens.
  • ALDES VentZone Systems.

Other Information

N/A

    Construction
    • Gasketed damper blade ensures a tight seal preventing unwanted air leakage and noise in closed position.
    • Constructed of 24-gauge galvanized steel housing for durability.
    • 24 VAC, 120 VAC, or 230 VAC actuator motor with spring return damper assembly.
    • Painted white extruded aluminum grille; adjustable airfoil blades.
    • Optional CAR3 constant airflow regulator.

    Warranty
    The entire unit is guaranteed for 3 years, from date of shipment, against all manufacturing defects, provided the material has been installed & operated per manufacturer’s instructions & under normal conditions. Warranty is limited to the repair or replacement of the material upon its return freight paid to our factory. This warranty is not transferable & limited to the original end user.

    Maintenance
    The ZRT-S needs no maintenance when used in normal conditions. If the intended application includes air heavily loaded with grease or dust, access to all components of the assembly is through the removable grille for cleaning.

    Control
    The ZRT-S is a normally-closed, spring-return damper mechanism which can be powered by any on-off control device(s). When powered, the control damper will fully open. Upon disconnecting the power, the ZRT integral spring will return the damper to the closed position. The included confirmation switch can be used to monitor ZRT status, or power other devices. Any on-off control device(s) will signal the damper to open fully, providing maximum ventilation control.

    Optional Constant Airflow Regulator used to regulate airflows to constant levels in response to duct pressure. Use the CAR3 to control for both maximum and minimum flow rates.