Contemporary Controls BASstat Series Bedienungsanleitung

BAST-221C/CH-B2

BACnet Communicating Thermostat for Multi-Stage Heating/Cooling/Ventilation

BASstat

Multi-Stage Thermostat

User Manual

# UM-15090000-AA8

UM-15090000-AA8 Page 1

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.

may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any

language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical,

chemical, manual, or otherwise, without the prior written permission of:

Contemporary Control Systems, Inc.

Tel:

+1-630-963-7070

2431 Curtiss Street

Fax:

+1-630-963-0109

Downers Grove, Illinois 60515 USA

E-mail:

[email protected]

Contemporary Controls Ltd

Tel:

+44 (0)24 7641 3786

14 Bow Court

Fax:

+44 (0)24 7641 3923

Fletchworth Gate

E-mail:

[email protected]

Coventry CV5 6SP UK

Contemporary Controls (Suzhou) Co. Ltd Tel: +86 512 68095866

19F, Metropolitan Towers

Fax:

+86 512 68093760

No.199 Shishan Road

Suzhou New District

E-mail:

[email protected]

Suzhou PR China

215009

Contemporary Controls GmbH

Tel:

+49 (0)341 520359 0

Fuggerstraße 1 B

Fax:

+49 (0)341 520359 16

D-04158 Leipzig Deutschland

E-mail:

[email protected]

Disclaimer

Contemporary Control Systems, Inc. reserves the right to make changes in the specifications of the

product described within this manual at any time without notice and without obligation of Contemporary

Control Systems, Inc. to notify any person of such revision or change.

UM-15090000-AA8 Page 2

Contents

1Introduction..................................................................................................................3

1.1. Features and Benefits .................................................................................................4

1.2. Product Image and Main Features...............................................................................5

2Specifications ..............................................................................................................7

2.1. Inputs...........................................................................................................................7

2.2. Outputs ........................................................................................................................7

2.3. Communication............................................................................................................7

2.4. Electrical ......................................................................................................................7

2.5. Environmental..............................................................................................................8

2.6. Electromagnetic Compatibility......................................................................................8

2.7. Mechanical (all dimensions are in mm)........................................................................9

3Installation .................................................................................................................11

3.1. Terminal Block Pin Assignments ...............................................................................11

3.2. Limited Power Source................................................................................................11

3.3. Power Supply Precautions.........................................................................................12

3.4. Wiring Diagram..........................................................................................................12

4Operation...................................................................................................................13

4.1. User Mode .................................................................................................................13

4.2. Control Type ..............................................................................................................15

4.3. Engineering Mode Menu............................................................................................19

4.4. BACnet Objects and Network Configuration..............................................................25

5Warranty ....................................................................................................................34

6Returning Products for Repair ...................................................................................35

7Declaration of Conformity ..........................................................................................35

UM-15090000-AA8 Page 3

1 Introduction

The BAST-221C-B2 is a member of the BASstat BACnet Communicating Thermostat series. It

provides multi-stage heating and cooling control in an attractive wall-mounted enclosure with a

large LCD display. Intended for use with rooftop units (RTUs), the thermostat can control one or

two stages of heating and two stages of Direct Expansion (DX) cooling. The BASstat is BACnet

compliant and BTL listed to ensure seamless integration into BACnet networks, using

BACnet/MSTP over 2-wire EIA-485. The BAST-221C-B2 can be routed to BACnet/IP clients

using a BASrouter (BASRT-B). A large, easy to read LCD display indicates setpoint, space

temperature and current mode of operation using graphical icons.

The BASstat has a built-in space temperature sensor with provision for remote wired 3kΩ NTC

thermistor sensor or temperature value can be sent by another communicating device over the

BACnet network. “221CH” thermostat models support relative humidity reading with a built-in

sensor which is shown on the display and as a BACnet object, as well as a calculated dew point

value as a BACnet object (no control action is taken based on humidity). Both models have five

relays – two for stage heating, two for stage cooling and one for fan. The BASstat is

configurable locally using the Engineering Menu or via a network connection to a BACnet client.

Contemporary Controls’ free BACnet Discovery Tool (BDT): www.ccontrols.com/sd/bdt.htm can

be used for initial discovery and configuration of the thermostat over the network. Control

algorithm parameters such as deadband, proportional gain, integral rate and trip points are all

configurable. This BASstat also features configurable fan control and occupancy selection.

Operating states are indicated on the thermostat display.

The numerous features available in the BASstat can be configured by the systems integrator to

meet user requirements in two different ways. One way is using a button sequence on the

thermostat in order to enter the Engineering Menu - which requires physical access to the

thermostat. 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. All features available are configurable using both methods.

UM-15090000-AA8 Page 4

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

•Suitable for single to multi-stage heat/cool control applications with

manual or automatic changeover between heating and cooling modes

•Adjustable algorithm applied to multi-stage step control

•Adjustable minimum on/off time staging for optimizing runtime

•Effective run time accumulation for system runtime for energy

consumption metering

•Full configurable control parameters such as deadband, proportional

gain, integral rate, stage trip points, and cycle time

•Adjustable minimum/maximum set point ranges

•Three options for temperature reading:

•Built-in temperature sensor, or

•Remote sensor (RS) input for wiring in a remote temperature sensor

(NTC 3kΩ), or

•BACnet network temperature override

•Occupancy status can be switched from thermostat buttons by

occupants or using BACnet network command.

•Separate adjustable occupied set points for heating and cooling mode

•Separate adjustable unoccupied set points for heating and cooling mode

•Fan can be set to run continuously or automatically depending upon fan

mode

•Non-volatile memory retains user settings during power outage

•Thermostat buttons are lockable to prevent tampering

•°C or °F display

•Control outputs disabled during “OFF” state for safety

UM-15090000-AA8 Page 5

1.2. Product Image and Main Features

BASstat 221C-B2

UM-15090000-AA8 Page 6

BASstat 221CH-B2

UM-15090000-AA8 Page 7

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 thermistor

2.2. Outputs

Item

Description

Relay Outputs

Heating 1, Heating 2, Cooling 1, Cooling 2, Fan

Contact Rating

SPST 2A at 30 VAC with inductive load

Minimum contact life

100,000 cycles

2.3. Communication

Item

Description

Protocol Compliance

BACnet MS/TP with B-ASC, BTL Listed

Physical Layer

2-wire, non-isolated EIA-485, no built-in EOL termination

Baud Rate

9.6, 19.2, 38.4, 76.8 kbps (default 38.4 kbps), N81 format

Cabling

Single-pair twisted 24GA with shield

2.4. Electrical

Item

Description

Supply Voltage and Current

24 VAC (±10%) 5 VA

Power Source Class

NFPA 70 (NEC) Article 725 Part III Class 2

Internal Power Supply

Half-wave rectified and filtered DC

UM-15090000-AA8 Page 8

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

Test Method

Description

EN 61000-6-2

IEC 61000-4-2

Electrostatic Discharge Immunity

EN 61000-6-2

IEC 61000-4-3

Radiated, Radio-Frequency,

Electromagnetic Field Immunity

EN 61000-6-2

IEC 61000-4-4

Electrical Fast Transit/Burst Immunity

EN 61000-6-2

IEC 61000-4-5

Voltage Surge Immunity

EN 61000-6-2

IEC 61000-4-6

Immunity to Conducted Disturbances

EN 61000-6-2

IEC 61000-4-8

Power Frequency Magnetic Field

Immunity

EN 61000-6-2

IEC 61000-4-11

Voltage Dips and Interruptions

EN 61000-6-3

IEC 61000-3-2

Limits for Harmonic Current Emissions

EN 61000-6-3

IEC 61000-3-3

Limitation of Voltage Fluctuations and

Flicker in Low Voltage Supply Systems

UM-15090000-AA8

Page 9

2.7. Mechanical (all dimensions are in mm)

Wiring: 14 to 22 AWG wires or 1.5mm2 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

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