Contemporary Controls BASstat BAST-321HP-B2 User Manual
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Contemporary Controls BASstat BAST-321HP-B2 User Manual

Heat pump thermostat
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BAST-321HP-B2
BACnet Communicating Thermostat for 2-stage Heat Pump Operation
BASstat
Heat Pump Thermostat
User Manual
# UM-15094000-AA0

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Summary of Contents for Contemporary Controls BASstat BAST-321HP-B2

  • Page 1 BAST-321HP-B2 BACnet Communicating Thermostat for 2-stage Heat Pump Operation BASstat Heat Pump Thermostat User Manual # UM-15094000-AA0...
  • 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 Features and Benefits ..................4 Product Image and Main Features ..............5 BASstat 321C-B2 ...................... 5 Specifications ......................6 Inputs ........................ 6 Outputs ........................ 6 Communication ....................6 Electrical ......................6 Environmental ...................... 7 Electromagnetic Compatibility ................7 Mechanical (all dimensions are in mm) ..............

  • Page 4: Introduction

    NTC thermistor sensor or temperature value can be sent by another communicating device over the BACnet network. The BASstat is configurable locally using the Engineering Menu or via a network connection to a BACnet client. Contemporary Controls’ free BACnet Discovery Tool can be used for initial discovery and configuration of the thermostat over the network.

  • 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 communication - BACnet MS/TP with baud rate selections up to 76.8kbps •...

  • Page 6: Product Image And Main Features

    Product Image and Main Features BASstat 321C-B2 UM-15094000-AA0 Page 5...

  • Page 7: Specifications

    2 Specifications 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 Energy Savings Input Provision for external occupancy sensor Setpoint Range 32-122°F (0-60°C) in 0.5° (°F or °C) increments Remote Temperature Sensor Provision for NTC Type 3kΩ...

  • Page 8: Environmental

    Environmental Item Description Operating Temperature 32°F to 122°F (0 to 50°C) Storage Temperature 14°F to +140°F (-10°C to 60°C) Relative Humidity 5 to 95% non-condensing Electromagnetic Compatibility The BAST-321HP-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...

  • 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 UM-15094000-AA0 Page 8...

  • Page 10: Installation

    3 Installation The BAST-321HP-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: Power Supply Precautions

    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 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 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 temperature. the Engineering Menu or [MSV7] 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]...

  • 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. Multi-stage 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 BACnet controlled – In this control scheme, the built-in thermostat algorithm can be bypassed, and the thermostat can be controlled over the BACnet network with commands from the supervisor device. The logic executing in the supervisor (such as Niagara or Sedona logic) can control the thermostat over the BACnet network. To put the thermostat in BACnet network control mode, use the Lock [AV18] object bit 9: Control DOs by thermostat algorithm “0”...
  • Page 16 • Maximum cycles per hour will check cycle times in a particular hour. When the cycle times reach the setting maximum cycles in that hour, it won’t allow more cycles until next hour. • When the stage state change is pending by Short Cycle Delay or Maximum Cycles, the Clock icon ( ) will appear on the LCD.
  • Page 17 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.

  • Page 18: Engineering Mode Menu

    LCD. 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 19 selection. If no button is pressed for 10 seconds, the display will return to the menu item selection. After another 10 seconds, the display will return back to User mode. Settings are not changed unless confirmed using the MODE button. •...
  • Page 20 Engineering Menu Items Table °C Scale °F Scale Item Mnemonic Description Step Default Range Default Range Deadband 0~10 0~18 0.5 (°C/°F) ESIC Unoccupied(ESI) cooling set point 25~35 82.5 77~95 1.0 (°C/°F) ESIH Unoccupied(ESI) heating set point 10.0~22. 50.0~72. 1.0 (°C/°F) Integral Time and Output Cycle Time 0~500 0-500...
  • Page 21 °C Scale °F Scale Item Mnemonic Description Step Default Range Default Range ESI contact definition 0: N.O. 1: N.C. rE-C Not used rE-H Not used Space Temperature input from built-in 0: built-in temperature Sensor, remote temperature 1: remote sensor, or assigned via BACnet sense 2: assigned via BACnet...
  • Page 22 °C Scale °F Scale Item Mnemonic Description Step Default Range Default Range 0: Cooling Only 1: C&H tyPE Control Type Manual 2: C&H Auto 3: Heating Only NOTE: Cool OPL2 Minimum Output for AO2 (not used) SPA2 Span Offset for AO2 (not used) Hrtr Communication Heartbeat Minimum 10~3600...
  • Page 23 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. The first 10 bits are used (bit 0 ~ bit 9), bits 10~15 are reserved/unused. Bits are represented by their decimal values and are added or subtracted to toggle from “0”...

  • Page 24: 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. Reset Settings The BASstat will store configuration in the event of power loss.
  • Page 25 Object name Type & Readable/ Description Range and Definition Instance Writable Current -999~9999: -99.9～999.9 Temperature AI 0 Current Temperature ℃/°F Active Temperature Active Temperature Set- °C :0~500 (0.0～50.0℃) Setpoint AI 1 Point °F : 320~1220 (32.0~122.0°F) Built-in Space Built-in Space Temperature -999~9999:-99.9～999.9 Temperature Sensor AI 2 Sensor Reading...
  • Page 26 Object name Type & Readable/ Description Range and Definition Instance Writable Cooling °C :0~500 (0.0～50.0℃) Temperature AV 0 Cooling Temperature Set °F: 320~1220 Setpoint Point (32.0~122.0°F) Space Temperature AV 1 Space Temperature Via -999~9999 via Network Network (-99.9～999.9℃/°F) Timer Off (Only for Models 0~24: 0~24 Hours Count Timer Off AV 2...
  • Page 27 Object name Type & Readable/ Description Range and Definition 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) Lock AV 18 LOCK...
  • Page 28 Object name Type & Readable/ Description Range and Definition Instance Writable Cooling Maximum AV 24 Cooling Maximum Cycles 2~6 Cycles Cycles per Hour per Hour Heating Short Cycle AV 25 Heating Short Cycle Delay 0~10 Minutes Heating Maximum AV 26 Heating Maximum Cycles 2~8 Cycles Cycles per Hour...
  • Page 29 Object name Type & Readable/ Description Range and Definition Instance Writable Maximum Fan Maximum Fan Output at 0%~Reg 51 Output AV 42 Auto Fan Mode (for Modulating Fan Application) Low Fan Speed AV 43 Low Fan Speed Setting (for 0%~Reg 53 Setting Modulating Fan Application) Med.
  • Page 30 Object name Type & Readable/ Description Range and Definition Instance Writable Dl 4 Status Bi 13 Status of Digital Input 4 0: Off, 1: On Dl 5 Status BI 14 Status of Digital Input 5 0: Off, 1: On Dl 6 Status BI 15 Status of Digital Input 6 0: Off, 1: On...
  • Page 31 Object name Type & Readable/ Description Range and Definition Instance Writable Relay 3 Control On/Off Control of Relay 3 0: Off, 1: On (Comp 2) Relay 4 Control BV10 On/Off Control of Relay 4 0: Off, 1: On (Heating Stage 3) Relay 5 Control BV11 On/Off Control of Relay 5...

  • Page 32: 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 33: Declaration Of Conformity

    United States China United Kingdom Germany Contemporary Control Contemporary Controls Contemporary Controls Ltd Contemporary Controls GmbH Systems, Inc. (Suzhou) Co. Ltd 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...

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