TAC I/NETTM MR-VAV-AX. Application Specific MicroRegulator TM

Transcription

1 TAC I/NETTM TM TAC s TM has an extensive range ofpre-engineered VAV control sequences, which combined with a fully integrated actuator and airflow transducer, makes it a low Total Installed Cost solution for most VAV terminal unit control applications.

2 02 Features An intelligent I/STAT TM interface for independent local control and an interface to a TAC I/NET TM Distributed Control System are standard options. Product AT A GLANCE Fully Integrated Actuator, Airflow Transducer and Controller in a single, low profile package. Standalone and Networked Applications Extensive VAV Control Sequences: Two Stage Heating, Multiple Modes Series/Parallel Fan Local/Remote Occupancy Override Local/Remote Central Plant Heat or Morning Warm-up Control Local/Remote Shut Down Override (fire, failure, etc.) Indoor Air Quality Airflow Setpoint Override Demand Control Setpoint Override Minimum and Maximum Airflow Parameters for heating and cooling Complete Out-of-the-Box Installation, Configuration and Commissioning DIP Switch Configuration and Network Addressing with Local/Remote Override Completely mount and secure with one box screw and two damper shaft screws Travel Limit Settings Automatic calibration of Airflow and Temperature Sensors Autoconfiguration of Heating Stages Prove It function for Performance Verification Automatic Database Distribution for Networked Configurations Default Parameter Values (continued) Operation The has been designed to minimize the total installation, setup, configuration and commissioning costs typically associated with VAV controllers. Installation costs have been reduced by integrating the actuator, airflow transducer and controller into a single, low profile, plenum-rated package that can be completely mounted and secured with one box screw and two damper shaft screws. Setup costs have been reduced by the provision of DIP switches that can be set during installation and before power is applied. For most applications, default parameters will allow the controller to run immediately from startup based on these switch settings. The is also supplied with an extensive range of pre-engineered and tested control sequences and therefore, no application programming is required. All configuration parameters are pre-installed with the most typical default values. However, they can be overwritten either by an I/STAT, an M/STAT (a portable I/ STAT) or the Operator Station PC. Heating stage setpoints, proportional bands and delays are automatically calculated and set in the controller based on the controller setup selection. Commissioning costs have been reduced by the use of several automated processes. Airflow conversion parameters are automatically calculated once the box duct diameter and the manufacturer s K-factor are entered. By measuring and entering the low and high airflow values for the box, automatic calibration of the installed airflow transducer is then performed. Automatic calibration of the temperature sensor is also initiated once a measured value is entered into the controller.

3 03 Features (continued) Dimensional Drawing Configuration and Commissioning by I/STAT, M/STAT or PC Auto-rescaling of velocity transducer in low flow applications Self-Test Diagnostics I/STAT and M/STAT Support Standard Local Display - 3 Digit & Decimal Local Point Control - Analog or Digital Local Override & Setpoint Adjustment Service Mode for Commissioning and Calibration User-Defined Passwords Slide/STAT Support Standard Slide Setpoint Override Occupancy Override Integral Port for M/STAT Connection Inputs Integrated Airflow Transducer Thermistor or Discrete Low Voltage Triac Outputs for Series/Parallel Fan Control First Stage Heater Control (Two Position, Frequency Modulated, Pulse Width Modulated or Floating Control Modes) Second Stage Heater Control (Two Position Control only) Integrated Actuator A Prove It function allows a complete verification of the control sequence from an I/STAT or M/STAT. Once initiated, the space temperature is placed in Test Mode and can be increased or decreased by the buttons on the I/STAT. As the temperature value is changed through the control range, the I/STAT displays the airflow values and the state of the fan and auxiliary heating. This allows confirmation of the thermodynamic process from end to end.

4 04 Features (continued) Finally, in a networked environment, the database for the MicroController Interface or an I/SITE LAN can be automatically generated by an upload of all the data in the connected Application Specific MicroRegulators. This database can also include a unique eight-character name for each controller as part of each point descriptor. In a standalone configuration, the controller provides auxiliary inputs for VAV Shutdown (e.g. fire alarm), Occupancy Override (e.g. Timer, Pushbutton or Occupancy Sensor) and Central Plant Heat or Morning Warm-Up Override (e.g. contacts from a central plant). In a network environment, these signals can be provided locally for the standalone mode or via the network. If these inputs are not used for local override signals, then they can be designated as free and used for any auxiliary input condition monitoring desired in a networked environment (e.g. supply air temperature). This is also applicable to any unused outputs. They can become available for control applications resident in the MCI or I/SITE LAN (e.g. lighting control). A networked environment of controllers can provide an extensive range of global interlocks. These include Demand Mode setpoint override, Central Plant Heat/Morning Warm-up, Smoke Control (purge and isolate), Indoor Air Quality (IAQ), Minimum Airflow setpoint override, Temperature Setpoint override and Occupancy override. Model Number TCON147 TCON148 TCON149 Description, 1 I/STAT Port, Integrated Airflow Transducer, 4 Thermistor or Discrete Inputs, 3 Low Voltage Triac Outputs, Integrated Actuator, 24Vac Installation Guide Installation Sheet Pocket Guide Also, the current damper actuator position is continuously calculated and available as an Analog Output value that is a percentage of full damper stroke. This eliminates the need for expensive feedback potentiometers and analog voltage controlled (0-10 Vdc) damper actuators. This analog output point can be overridden either manually from an operator station or automatically via an application program in the MCI or I/SITE LAN and the actuator driven to any desired absolute position. The controller can also provide an analog value of the current controller loading as a percentage value of full load for both cooling and heating modes. This value can be used in the networked system to provide an accurate signal to the central plant controllers of actual system load requirements.

5 05 Specifications Communication Ports Microregulator Lan RS-485, 9600 baud, asynchronous, polling. Network Wiring Requirements MR LAN Length 5000 ft (1500 m) Cable Supported Twisted pair, shielded. 24 AWG or larger, 30pF/ft or less between conductors, 55pF/ft or less conductor to shield, 85 to 150 Ohm impedance. Belden 9841 or equivalent Processor Processor Zilog 86C193 Memory EPROM: 32Kbytes RAM: 464Bytes NOVRAM: 4096Bytes. Physical Description Dimensions 7.75 L x 6.25 W x 2.5 H (19.7 cm x 15.9 cm x 6.3 cm). Enclosure Meets UL94-5V UL flammability for plenum applications. Power Requirements 24Vac, +10%, 50/60 Hz (9VA, plus triac load, 4A fused) Operating Temperature 32 F to 122 F (0 C to 50 C) Operating Humidity 10-90% RH, non-condensing Software Point Capacity 20 resident points. Hardware (external) points are a function of model selected and software (internal) points activated. Input/Output Space Sensor Input Supports I/STAT, Slide/STAT or 10K Ohm NTC Thermistor (Dale 1M1002-C3) Accuracy: 1 F (0.6 C) Resolution: 0.32 F ( F (25 C) Inputs May be either thermistor or discrete per the following specifications. Analog Inputs 10K Ohm NTC Thermistor (Dale 1M1002-C3) Accuracy: 1% Resolution: 0.4% Span A/D Digital Filtering: Median value filter and 60 Hz notch filter Calibration Coefficients: Factory set in NOVRAM, field adjustable, 6 individual pairs Digital Inputs Dry contact input Contact Excitation: 0.5 ma Discrete Outputs Low Voltage Triac: 0.5A maximum (voltage sourcing), fused Point Scan Interval seconds

6 06 Specifications (continued) Velocity Pressure Input Operating Range: 0.0 to 1 of W.C. (0 to 250Pa) Sensitivity: W.C. (0.73Pa) below midscale and W.C. (1.10Pa) above midscale. Tubing Connections: Barb fittings for (4.3 mm) I.D. FRPE polyethylene tubing or 0.25 O.D./0.125 I.D. 6.3 mm/3.2 mm) tygon tubing Tubing Length: 4 ft (1.2 m) maximum each tube Actuator Outputs Torque Rating: 53 lb-in (6 Nm) Stroke: Fully adjustable from 0 to 95 Timing: 2 sec/degree rotation (60 Hz), 2.4 sec/degree rotation (50Hz) Position Indication: Visual Indication Provided Manual Override: Push-button clutch release to allow manual positioning of damper Damper Linkage: 0.5 D (12.7 mm) round shaft extending a minimum of 1 (25 mm) from the box, 3/8 shaft adapter optional. Terminations Terminal Blocks Removable screw terminal connectors Indications LEDs MR LAN activity (transmitting & receiving - each channel), test mode (microprocessor check, EPROM check, NOVRAM check) Dip Switch SW1-5: Address (0 to 31) SW6-12: Function Selection Agency Approval FCC Part 15 UL916 Energy Management Equipment UL94-5V UL Requirements for Plenum Application MicroRegulator Interface (MRI) Available Platforms 7792 MRI 7793 MCI 7798 I/SITE LAN All brand names, trademarks and registered trademarks are the property of their respective owners. Information contained within this document is subject to change without notice. On October 1st, 2009, TAC became the Buildings Business of its parent company Schneider Electric. This document reflects the visual identity of Schneider Electric, however there remains references to TAC as a corporate brand in the body copy. As each document is updated, the body copy will be changed to reflect appropriate corporate brand changes Schneider Electric. All rights reserved. May 2006 pdw