Related Manuals for Contemporary Controls BASstat BAST-421C-B2
Summary of Contents for Contemporary Controls BASstat BAST-421C-B2
- Page 1 BAST-421C-B2 BACnet Communicating Thermostat for Modulating Fan Coil Operation BASstat Modulating Thermostat User Manual #UM-15093000-AA1...
- Page 2 Trademarks BASautomation, Contemporary Controls, and CTRLink are registered trademarks of Contemporary Control Systems, Inc. BACnet is a registered trademark of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. Powered by Sedona Framework is a trademark of Tridium, Inc. Other product names may be trademarks or registered trademarks of their respective companies.
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Page 3: Table Of Contents
Contents Introduction ......................... 3 Features and Benefits ................... 4 Product Image and Main Features ................ 5 Specifications ......................6 Inputs ........................6 Outputs ......................... 6 Communication ..................... 6 Electrical ....................... 6 Environmental ....................... 7 Electromagnetic Compatibility ................7 Mechanical (all dimensions are in mm) ..............8 Installation ........................ -
Page 4: Introduction
This BASstat is BACnet compliant and BTL listed to ensure seamless integration into a BACnet network, using BACnet/MSTP over 2-wire RS-485, and can be routed to BACnet/IP clients using a Contemporary Controls BASrouter (BASRT-B). A large and easy to read LCD display indicates setpoint, space temperature and current mode of operation using graphical icons. -
Page 5: Features And Benefits
Features and Benefits • Stand-alone thermostat algorithm or fully BACnet network-controllable • BTL listed with B-ASC device profile for integration into BACnet networks • 24VAC (+/-10%) power input • BACnet MS/TP with baud rate selections up to 76.8kbps • Suitable for 4-pipe modulating heat/cool control applications with manual or automatic changeover NOTE: 2-pipe heat/cool applications and floating-type valve actuators are not supported by this device •... -
Page 6: Product Image And Main Features
Product Image and Main Features BASstat 421C-B2 and BASstat 421C-BW2 UM-15093000-AA1 Page 5... -
Page 7: Specifications
2 Specifications Inputs Item Description Temperature Display Range -22 to 248 °F (-30 to 120.0°C) with suitable sensor Temperature Display Resolution 0.1°F (0.1°C) Temperature Accuracy ±1.8°F (±1.0°C) with all outputs off Energy Savings Input Provision for external occupancy sensor Setpoint Range 32-122°F (0-50°C) in 0.5°... -
Page 8: Environmental
Environmental Item Description Operating Temperature 32 to 122°F (0 to 50°C) Storage Temperature 14 to 140°F (-10 to +60°C) Relative Humidity 5 to 95% non-condensing Electromagnetic Compatibility The BAST-421C-B2 complies with the following specifications and bears the CE mark in accordance with the provisions of the Electromagnetic Compatibility (EMC) Directive 2004/108/EC based on the following specifications: Standard Test Method... -
Page 9: Mechanical (All Dimensions Are In Mm)
Mechanical (all dimensions are in mm) Mounts directly onto wall, panel, standard 65×65mm junction box (hole pitch 60 mm) or standard 2×4-inch vertical junction box (hole pitch 83.5mm). Width: 94mm Height: 118mm Depth: 34mm Page 8 UM-15093000-AA1... -
Page 10: Installation
3 Installation The BASstat 421C-B2 is intended for surface-mount installation on an interior wall, away from direct sunlight or direct air movement. The display (top half) can be removed from its base by loosening the small Philips screw at the bottom of the display. Once the display is removed from the base, the base can be mounted onto the wall with appropriate fasteners. -
Page 11: Wiring Diagram
recommended. AC power sources that power several half-wave devices have a common secondary connection called COMMON, LO, or GROUND. Connect the HOT side of the secondary to the 24 VAC high side input on the BASstat and the LO side to 24 VAC common. WARNING: Devices powered from a common AC source could be damaged if a mix of half- wave and full-wave rectified devices are both present. -
Page 12: Operation
4 Operation User Mode User-side control is accomplished with six buttons – MODE (Heat, Cool, or Ventilate), FAN (Auto or On), UP, DOWN, SET, and POWER. There are also options to lock the panel buttons to limit user access if so required. A large LCD display indicates setpoint, space temperature, occupancy status, and current mode of operation using graphical icons. - Page 13 User Mode Thermostat Operation Item Description Remarks Normal Display Display current room or set-point Use the (SP) parameter in the temperature Engineering Menu or [MSV6] Display to choose Current room or Set- point temperature on display. Temperature Set the desired temperature The [AV0] / [AV3] Cool / Heat Setpoint Setting Occupied and [AV8] / [AV9]...
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Page 14: Control Type
User Mode Flow Chart Control Type Control Type, System Mode and Algorithm Configuration System modes available to the user are dependent on control type. 4-Pipe Cooling or Heating with Auto Changeover – This the default control type in this thermostat. Mostly used for standalone operation. The thermostat will switch between Cool and Heat modes automatically. - Page 15 supervisor “1” (add decimal=512). Cool Only and Heat Only modes (nullified/disabled in firmware) are control types listed in the BACnet object and Engineering Menu object but are not available for use. Control type is only configurable by the installer using Engineering Mode Menu or BACnet supervisor.
- Page 16 Floating Deadband The Heat and Cool temperature setpoints could be “attached” together. This • means that as one setpoint is adjusted and “hits” against the deadband region, it will “push” the deadband region and the other setpoint along the temperature setpoint axis to allow for adjustment while maintaining the configured deadband.
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Page 17: Engineering Mode Menu
Engineering Mode Menu Thermostat configuration can be performed using the engineering menu or by controlling BACnet objects using a BACnet client tool such as Contemporary Controls free BACnet Discovery Tool (BDT). It is highly suggested that engineering mode be operated by trained installers only, because it is related to system parameters that will affect the control results. - Page 18 to User mode. Settings are not changed unless confirmed using the MODE button. • To leave Engineering Mode, rotate till (End) menu item appears and press the MODE button. Alternately, pressing no buttons for 10 seconds will return the thermostat back to User mode Engineering Menu Flow Chart UM-15093000-AA1 Page 17...
- Page 19 Engineering Menu Items Table BAST-421C-BW2 °C Scale °F Scale Step Item Mnemonic Description Default Range Default Range Deadband 0~10 0~18 0.5 (°C/°F) Unoccupied(ESI) cooling set point ESIC 25~35 82.5 77~95 1.0 (°C/°F) Unoccupied(ESI) heating set point ESIH 10.0~22.0 50.0~72.0 1.0 (°C/°F) Integral Time and Output Cycle Time 0~500 0-500...
- Page 20 °C Scale °F Scale Step Item Mnemonic Description Default Range Default Range 0: N.O. ESI (DI1) digital sensor contact definition 1: N.C. 0 (direct) Modulating Cooling direct/ reverse signal rE-C 1 (reverse) output 0 (direct) Modulating Heating direct/ reverse signal rE-H 1 (reverse) output...
- Page 21 °C Scale °F Scale Step Item Mnemonic Description Default Range Default Range 1: 4-Pipe cooling or heating Manual tyPE Changeover Control Type 2: 4-Pipe heating and cooling auto Changeover OPL2 Minimum Output for AO2 0(0V) 0~125 0 (0v) 0~125 1 (LSB) (0.044V) SPA2 Span Offset for AO2...
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Page 22: Bacnet Objects And Network Configuration
All configuration parameters are settable through use of the buttons on thermostat by entering the Engineer Menu, or once installed on the BACnet network, configuration can also be altered using BACnet commands. Network command-based configuration can also be accomplished using a Wi-Fi enabled laptop/computer/tablet/smart phone and Contemporary Controls’ free BACnet Discovery Tool. BACnet Object Table BAST-421C-B2 Object name Type &... - Page 23 Type & Readable/ Object name Description Range and Definition Instance Writable Current -999~9999: -99.9～999.9 AI 0 Current Temperature ℃/°F Temperature Active Temperature °C :0~500 (0.0～50.0℃) Active Temperature Set- AI 1 Setpoint Point °F : 320~1220 (32.0~122.0°F) Built-in -999~9999:-99.9～999.9 Built-in Temperature Temperature AI 2 Sensor Reading...
- Page 24 Object name Type & Readable/ Description Range and Definition Instance Writable Hr-Running Time Running Time of Valve 0~65535 (Hr.) For AV 4 (Hr.) Reading But 0~30000 (Hr.) For Writing. M-Running 0~59 (Minute) Running Time of Valve (M.) AV 5 Time Running Time of 0~59 (Sec.) AV 6...
- Page 25 Type & Readable/ Range and Definition Object name Description Instance Writable Bit Definition: 0: MODE button (dec=1) 1: Down button (dec=2) 2: Up button (dec=4) 3: FAN SPEED button (dec=8) 4: Power On/Off button 5: SET (or ℃/℉) button (dec=16) (dec=32) 6: ESI contact detection (dec=64)
- Page 26 Object name Description Range and Definition Type & Readable/ Instance Writable AV 23 Cooling Short Cycle Delay Cooling Short Cycle 1~3 Minutes Delay Cooling Maximum Cooling Maximum Cycles 2~6 Cycles AV 24 Cycles per Hour per Hour Heating Short Cycle Heating Short Cycle Delay 0~3 Minutes AV 25...
- Page 27 Object name Description Range and Definition Type & Readable/ Instance Writable Maximum Fan Maximum Fan Output at Output Auto Fan Mode (for AV 42 Reg 50~100% Modulating Fan Application) Low Fan Speed Low Fan Speed AV 43 0%~Reg 53 Setting Setting (for Modulating Fan Med.
- Page 28 Object name Description Range and Definition Type & Readable/ Instance Writable Dl 3 Status Status of Digital Input 3 0: Off, 1: On BI 12 Dl 4 Status Status of Digital Input 4 0: Off, 1: On BI 13 Dl 5 Status Status of Digital Input 5 0: Off, 1: On BI 14...
- Page 29 Object name Description Range and Definition Type & Readable/ Instance Writable Temperature Scale °C/ °F 0: °C 1: °F BV 6 Relay 1 Control On/Off Control of 0: Off, 1: On BV 7 Relay 1 Relay 2 Control On/Off Control of Relay 2 0: Off, 1: On BV 8 Relay 3 Control...
- Page 30 Object name Range and Definition Type & Readable/ Description Instance Writable 1: 9600 bps 2: 19200 bps Baud Rate Baud Rate (BPS for MS/TP) 3: 38400 bps MSV6 4: 57600 bps 5: 76800 bps 1: T & Time (if available) 2: Display Options LCD Display Options SP &...
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Page 31: Warranty
5 Warranty Contemporary Controls (CC) warrants this product to the original purchaser for two years from the product shipping date. Product returned to CC for repair is warranted for one year from the date the repaired product is shipped back to the purchaser or for the remainder of the original warranty period, whichever is longer. - Page 32 United States China United Kingdom Germany Contemporary Control Contemporary Controls Contemporary Controls Contemporary Controls Systems, Inc. (Suzhou) Co. Ltd GmbH Tel: +1-630-963-7070 Tel: +86 512 68095866 Tel: +44 (0)24 7641 3786 Tel: +49 341 520359 0 Fax: +1-630-963-0109 Fax: +86 512 68093760...
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