Contemporary Controls BASstat Series User Manual
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Contemporary Controls BASstat Series User Manual

Bacnet communicating thermostat for multi-stage heating/cooling/ventilation
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BAST-221C/CH-B2
BACnet Communicating Thermostat for Multi-Stage Heating/Cooling/Ventilation
BASstat
Multi-Stage Thermostat
User Manual
# UM-15090000-AA8

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Summary of Contents for Contemporary Controls BASstat Series

  • Page 1 BAST-221C/CH-B2 BACnet Communicating Thermostat for Multi-Stage Heating/Cooling/Ventilation BASstat Multi-Stage Thermostat User Manual # UM-15090000-AA8...
  • 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.

  • Page 3: Table Of Contents

    Contents Introduction ........................3 1.1. Features and Benefits ....................4 1.2. Product Image and Main Features ................5 Specifications ......................7 2.1. Inputs ........................... 7 2.2. Outputs ........................7 2.3. Communication ......................7 2.4. Electrical ........................7 2.5. Environmental ......................8 2.6.

  • Page 4: Introduction

    Optionally, the buttons could be locked to limit user access to Engineering Menu after installation is complete. The second method is configuring the thermostat over the BACnet network using a BACnet client device or software such as Contemporary Controls’ free BACnet Discovery Tool.

  • Page 5: Features And Benefits

    1.1. Features and Benefits Stand-alone thermostat algorithm or fully BACnet network-controllable • BTL listed with B-ASC device profile for seamless integration into • BACnet networks 24VAC (+/-10%) power input • Manual-changeover or Auto-changeover control types • BACnet MS/TP with baud rate selections up to 76.8kbps •...

  • Page 6: Product Image And Main Features

    1.2. Product Image and Main Features BASstat 221C-B2 UM-15090000-AA8 Page 5...
  • Page 7 BASstat 221CH-B2 UM-15090000-AA8 Page 6...

  • Page 8: Specifications

    2 Specifications 2.1. Inputs Item Description Temperature Display Range 14 to 140°F (-10 to +60°C) Temperature Display Resolution 0.1°F (0.1°C) Temperature Accuracy ±1.8°F (±1.0°C) with all outputs off Setpoint Range 32 to 122°F (0 to 50°C) in 0.5° (°F or °C) increments Remote Temperature Sensor Provision for NTC Type 3kΩ...

  • Page 9: Environmental

    2.5. Environmental Item Description Operating Temperature 32°F to 122°F (0 to 50°C) Storage Temperature 14 to 140°F (-10 to +60°C) Relative Humidity 5 to 95% non-condensing 2.6. Electromagnetic Compatibility The BAST-221C 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...

  • Page 10: Mechanical (All Dimensions Are In Mm)

    2.7. Mechanical (all dimensions are in mm) Wiring: 14 to 22 AWG wires or 1.5mm wires 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 UM-15090000-AA8 Page 9...
  • Page 11 UM-15090000-AA8 Page 10...

  • Page 12: Installation

    3 Installation The BASstat is intended for surface-mount installation at eye-level 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 13: Power Supply Precautions

    3.3. Power Supply Precautions Internally, the BASstat utilizes a half-wave rectifier and can share the same AC power source with other half-wave rectified devices. Sharing AC power with full-wave rectified devices is NOT recommended. AC power sources that power several half-wave devices have a common secondary connection called COMMON, LO, or GROUND.

  • Page 14: Operation

    4 Operation 4.1. 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 15 User Mode Thermostat Operation Item Description Remarks Normal Display Display current room or set-point Use the (SP) parameter in temperature the Engineering Menu or [MSV6] Display Option for BW2 or [MSV7] Display Option for B2 model to choose Current room or Set- point temperature on display.

  • Page 16: Control Type

    User Mode Flow Chart 4.2. Control Type Control Type, System Mode and Algorithm Configuration The BAST-221C supports two different control types, selectable in Engineering Menu item (tyPE) or BACnet object [MSV8]. Control type is only configurable by the installer using Engineering Mode Menu or BACnet supervisor.
  • Page 17 Dual Stage Heat and Cool with Manual Changeover – In this control type the thermostat will wait for a command from user or BACnet supervisor to switch between Cool and Heat modes. The user will be presented with a choice of Heat or Ventilation@Heat when the thermostat is in Heat mode, and Cool or Ventilation@Cool when the thermostat is in Cool mode.
  • Page 18 System Mode The default control type is 2-stage cooling and heating with automatic changeover. This • makes the thermostat operate fully stand-alone. Control Type can be selected in (tyPe) or [MSV8]. Manual Changeover control type allows restriction of mode selection to Cool only or Heat only in applications where necessary.
  • Page 19 continuously after a control action. This feature is useful for thermostat models with multiple fan speeds. Fan Mode can be toggled between AUTO or CONTINUOUS by using the FAN button on • the thermostat (user) or BACnet object [MSV0] Fan Mode (BACnet supervisor). By default, this value is set to “Auto(1)”, the AUTO icon is displayed, and the fan will be controlled automatically.

  • Page 20: Engineering Mode Menu

    Thermostat configuration can be performed using the engineering mode menu described below or 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 21 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 MODE MODE E01 Setting MODE MODE E02 Setting No button pressed...
  • Page 22 Engineering Menu Items Table °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 23 °C Scale °F Scale Step Item Mnemonic Description Default Range Default Range 0: N.O. ESI (DI1) digital sensor contact definition 1: N.C. rE-C Not used rE-H Not used 0: built-in Present Temperature is getting from built-in 1: remote sense temperature Sensor, remote temperature 2: assigned sensor, or assigned through communication through...
  • Page 24 °C Scale °F Scale Step Item Mnemonic Description Default Range Default Range dLyH 1 (minutes) Heating Short Cycle Heating Maximum Cycles per cycH 2~255 2~255 1 (cycles/hour) Hour 0: Cooling Only 1: C&H Manual tyPE 2: C&H Auto Control Type 3: Heating Only NOTE: Cool only and Heat...
  • Page 25 °C Scale °F Scale Step Item Mnemonic Description Default Range Default Range Reset all parameters including communication Press MODE to and control algorithm to the factory defaults Caution! load reset Press MODE to Exit Engineer Mode Menu exit engineering menu Lock Function Setup and Examples The 16-bit binary encoded decimal register accessed through Lock [AV17] BACnet object and LOC engineering menu item is used to enable/disable features in the thermostat.

  • Page 26: 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 laptop/computer/tablet and Contemporary Controls’ free BACnet Discovery Tool.
  • Page 27 Device Instance = (dEVH)*1000+(dEVL). Device Instance example: if (dEVH) is set to 4194 and (dEVL) is set to 7, the Device Instance Number = 4194007. Device Instance Number can also be changed by writing to BACnet object [AV21] Device Instance once the thermostat is online. Max masters setting can be set from Engineering Menu item (AdrH), default value is 127.
  • Page 28 Type & Readable/ Object name Description Range and Definition Instance Writable Modulating/ Modulating/ Floating Output 0~100: 0～100 % AI 8 Floating Output 1 Modulating/ Modulating/ Floating Output 0~100: 0～100 % AI 9 Floating Output 2 Modulating Fan 0~100: 0～100 % Modulating Fan Output AI 10 Output...
  • Page 29 Type & Readable/ Object name Description Range and Definition Instance Writable Analog Minimum Minimum Output Voltage in 0~125 (LSB) Output Digital Value When Reach AV 11 Low Limit for AO1 Span Offset Span Offset for AO1 -55~0 (LSB) AV 12 °C :0~500 (0.0～50.0℃) Low Setpoint Limit Low Limit for Set-Point...
  • Page 30 Type & Readable/ Object name Description Range and Definition Instance Writable Bit Definition: 0: MODE button (dec=1) 1: Down buttons (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 31 Type & Readable/ Object name Description Range and Definition Instance Writable Cooling Short Cycle Cooling Short Cycle Delay 1~3 Minutes AV 23 Cooling Maximum Cycles Cooling Maximum Cycles 2~6 Cycles per Hour per Hour AV 24 Heating Short Cycle Heating Short Cycle Delay 0~3 Minutes AV 25 Heating...
  • Page 32 Type & Readable/ Object name Description Range and Definition Instance Writable Med. Fan Speed Med. Fan Speed Setting (for Setting Modulating Fan Reg 52~Reg54 Application) AV 44 Hi Fan Speed Hi Fan Speed Setting(For Reg 53~100% AV 45 Setting Modulating Fan Application) Minimum Off AV 46 Time...
  • Page 33 Type & Readable/ Object name Description Range and Definition Instance Writable Dl 7 Status Status of Digital Input 7 0: Off, 1: On BI16 Fan Status Fan Status 0: Off, 1: On BI17 Flow Switch Status Differential Pressure (Air 0: Off, 1: On BI18 Flow) Switch Status Trip Status...
  • Page 34 Type & Readable/ Object name Description Range and Definition Instance Writable Relay 4 Control On/Off Control of Relay 4 0: Off, 1: On BV10 (Heating Stage 2) Relay 5 Control On/Off Control of Relay 5 0: Off, 1: On BV11 Relay 6 Control On/Off Control of Relay 6 0: Off, 1: On...

  • Page 35: 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 36: Returning Products For Repair

    7 Declaration of Conformity Additional compliance documentation can be found on our website:www.ccontrols.com 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...

This manual is also suitable for:

Bast-221c-b2Bast-221ch-b2

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