Shutoff Air Terminals — Shutoff, Shutoff with Reheat and Dual Duct

DDC /VAV II Microprossor

1 Trane understands that the building’s safety is critical to you and your customer. Therefore, all shutoff units are UL as well as CSA listed.

2 ARI certification for the entire product line.

3 Standardization of dimensions provides uniformity throughout the product offering.

4 For bypass applications, Trane provides a shutoff unit with a static pressure controller. In this application the shutoff unit does not control space temperature, but simply dumps air into the plenum based on a static pressure setpoint. This unit will control static pressure in the supply duct by modulating the air valve open or closed.

5 Factory provided disconnect shall break all legs of power wiring entering the control box. An optional fuse is available on primary leg of power wiring.

6 For critical acoustic jobs, a sound attenuator now available for shutoff boxes.

Leadership: Controls

Direct Digital Control

Direct digital control of VAV units (DDC/VAV is a key element in providing intelligent, responsive building management. A single twisted wire pair links factory-mounted VAV microprocessor controls with Tracer® building management products. Trane will also factory mount other control companies’ controllers. Precision control, flexible comfort and after hours access are all available with Trane DDC/VAV systems. Key features of the system include:

• Advanced unit controller.
• Flexible system design.
• User-friendly interaction.

Advanced Controller

The Trane DDC/VAV controller is designed specifically for VariTrane® terminals. Trane’s circuit board failure rate is less than one percent. Key features include:

• Complete factory mounting, calibration and check-out, assuring high reliability and quality control.
• DDC control algorithm, providing accurate, pressure independent zone temperature control.
• Setpoints retained in editable, non-volatile software memory (no potentiometers to field adjustor access). Preprogrammed, fail-safe backup modes of operation.
• Self-calibrating flow measuring system maintains accuracy over controller life.

Tracer^® DDC/VAV

System Layout

• Factory-mounted DDC/VAV unit controllers.
• A VAV command unit acting as a central controller for groups of VAV units.
• A high level Tracer^® or generic automation system. Although the command unit can operate alone, the greatest benefits are realized when a Tracer building management system is providing total building management.

FIexibility

Several benefits can be realized due to system flexibility:

• On site or off site monitoring of VAV box status and editing of setpoints.
• Flexible software grouping of VAV boxes accommodates changes in building occupancy and independently tailored operating schedules.
• After hours tenant tracking and automatic billing using the Tracer building management software.
• Building control strategies can be initiated from the VAV command unit or Tracer unit. Strategies include occupied/unoccupied mode; cooling/ heating changeover; drive VAV air valves open, closed, to minimum airflow or maximum airflow for morning warm-up, smoke purge, system balancing, etc.; lockout VAV unit fans; lockout VAV unit heat; and demand limiting.

User-Friendly

A key to any automation system is in the ability for the user to quickly and efficiently access pertinent building status information. The Trane DDC/VAV system is designed with this ability in mind, placing the pulse of the building at the building manager’s fingertips.

The Trane DDC/VAV system provides responsive building control. The flexibility provided, efficiency gained, and most importantly, the ease of use, permits DDC/VAV to be a control option for any building type or size.

In addition to DDC/VAV controls, the VariTrane product line is available with one of the most complete lines of pneumatic and electronic controls in the HVAC industry.