Contemporary Controls BAST-121C-B2 User manual

BAST-121C-B2
BACnet Communicating Thermostat for Single Mode Heating/Cooling/Ventilation
BASstat
Single Mode Thermostat
User Manual
# UM-15095000-AA0

UM-15095000-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.
Copyright
© Copyright 2023, by Contemporary Control Systems, Inc. All rights reserved. No part of this
publication 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:
[phone]
2431 Curtiss Street
Fax:
[phone]
Downers Grove, Illinois 60515 USA
E-mail:
[email protected]
Contemporary Controls Ltd
Tel:
[phone]
United Kingdom
Fax:
[phone]
E-mail:
[e-mail]
Contemporary Controls (Suzhou) Co. Ltd
Tel:
[phone]
China
Fax:
[phone]
E-mail:
[email protected]
Contemporary Controls GmbH
Tel:
[phone]
Germany
Fax:
[phone]
E-mail:
[email protected]m
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-15095000-AA0 Page 3
Contents
1 Introduction .............................................................................................................................. 4
1.1. Features and Benefits ....................................................................................................... 5
1.2. Product Image and Main Features .................................................................................... 6
BASstat 121C-B2 ..................................................................................................................... 6
2 Specifications ........................................................................................................................... 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
3 Installation .............................................................................................................................. 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
4 Operation ............................................................................................................................... 13
4.1. User Mode ....................................................................................................................... 13
User Mode Thermostat .......................................................................................................... 14
User Mode Flow Chart ........................................................................................................... 15
4.2. Control Type .................................................................................................................... 15
Fan Output in Heat Mode ....................................................................................................... 16
Fan Output in Heat Mode ....................................................................................................... 16
Algorithm ................................................................................................................................ 16
System Mode ......................................................................................................................... 17
Fan Control Output ................................................................................................................ 17
Short Cycle and Maximum Cycles per Hour .......................................................................... 17
Minimum Cooling Setpoint and Maximum Heating Setpoint .................................................. 18
Assigned Current Temperature .............................................................................................. 18
Occupancy Setting ................................................................................................................. 18
4.3. Engineering Mode Menu ................................................................................................. 19
Operation of Engineering Menu ............................................................................................. 19
Engineering Menu Flow Chart ............................................................................................... 19
Engineering Menu Items Table .............................................................................................. 20
Lock Function Setup and Examples ...................................................................................... 24
4.4. BACnet Objects and Network Configuration .................................................................... 25
Transmission type .................................................................................................................. 25
Initial Configuration ................................................................................................................ 25
MS/TP Communication Configuration .................................................................................... 25
BACnet Object Table ............................................................................................................. 27
5 Warranty ................................................................................................................................ 35
6 Returning Products for Repair ................................................................................................ 35
7 Declaration of Conformity ....................................................................................................... 35

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1 Introduction
The BAST-121C-B2 is a member of the BASstat BACnet Communicating Thermostat series. It
provides multi-stage heating only or cooling only control in an attractive wall-mounted enclosure
with a large LCD display. Intended for use with single mode heating and cooling units, the
thermostat can control one or two stages of heating, one or two stages of Direct Expansion (DX)
cooling, or a single 0-10V control output for either modulated heating or cooling. The BASstat is
BACnet compliant and BTL listed to ensure easy integration into BACnet networks using
BACnet/MS/TP over 2-wire EIA-485. The BAST-121C-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. The BAST-121C-B2 has three relays - two for staged heating or cooling
(depending upon operating mode) and one for fan. The BAST-121C-B2 has a single 0-10V
modulated output to control a single analog heating or cooling output device. 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. Control algorithm parameters such as
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 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 the 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. Most features available are configurable using both methods.

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1.1. Features and Benefits
• Stand-alone thermostat algorithm or fully BACnet network-controllable
• BTL listed with B-ASC device profile for easy integration into BACnet networks
• 24VAC (+/-10%) power input
• Single mode heating (default) or cooling control types
• BACnet MS/TP with baud rate selections up to 76.8kbps
• Suitable for single or 2-stage binary heat only/cool only control and single stage single-
mode modulating heat only/cool only control
• 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
• Configurable control parameters such as proportional gain, integral rate, stage trip
points, and cycle time
• Adjustable minimum/maximum set point ranges
• Three options for temperature reading:
o Built-in temperature sensor
o Remote sensor (RS) input for wiring in a remote temperature sensor (NTC 3kΩ)
o BACnet network temperature input from headend
• Occupancy status can be switched from thermostat buttons by occupants, a wired ESI
input, or using BACnet network command
• Separate adjustable set points for occupied or unoccupied modes
• 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

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1.2. Product Image and Main Features
BASstat 121C-B2

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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
32-122°F (0-60°C) in 0.5° (°F or °C) increments
Remote Temperature Sensor
Provision for NTC Type 3kΩ thermistor
Energy Savings Input (ESI)
“Dry” contact closure input for occupancy control
2.2. Outputs
Item
Description
Relay Outputs
C/H Stage1, C/H Stage 2, Fan
Analog Output
Single 0-10Vdc control output (C/H)
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 or BACnet/IP 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

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2.5. 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
2.6. Electromagnetic Compatibility
The BAST-121C-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
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

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2.7. 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

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.

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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. If a single-gang
electrical junction box is to be used, the top and bottom mounting holes will align with the screw
holes in the junction box.
3.1. Terminal Block Pin Assignments
Two terminal blocks provide for all field connections. Terminal markings for mechanical
equipment follow NEMA DC 3-2003 convention. For single-stage binary operation, connect Y
wire (cooling) or W wire (heating) to C/H1. AO1 and COM are the field connections for the single
modulating analog output. BACnet MS/TP data communication connections can be found at
terminals 16 and 17 and are polarity sensitive. The BASstat does not provide End-of-Line
termination. If the BASstat is the first or last device on the MS/TP bus, a termination resistor
(120Ω) must be applied across pins 16 and 17 of the input terminal. The remote sensor input
(RS) is at terminals 13 and 14. The remote occupancy (ESI) input is a dry contact closure input
located at terminals 14 and 15. The BASstat is intended to be powered by a Class 2 compliant
power source and only accepts 24VAC.
Number
Mark
Comment
Number
Mark
Comment
1
R
24 VAC high-side
10
AO1
Modulating cool/heat output
2
C
24 VAC common
11
COM
AO1 Common
3
C/H1
Stage 1 cool/heat
12
4
13
RS
Remote Sensor Input
5
C/H2
Stage 2 cool/heat
14
GND
Ground
6
15
ESI
Energy Saving Input
7
16
D+
BACnet MS/TP Data +
8
G
Fan
17
D-
BACnet MS/TP Data -
9
18
3.2. Limited Power Source
The BASstat is intended to be powered by a Class 2 compliant power source and only accepts
24VAC with no more than 5VA of power consumption and should be powered by a Class 2
power source complying with the requirements of the National Electric Code (NEC) article 725.
The transformer or power supply complying with the Class 2 rating must carry a corresponding
listing from a regulatory agency such as Underwriters Laboratories (UL).

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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. 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. If you are not sure of the type of rectifier used by
another device, do not share the AC source with it.
3.4. Wiring Diagram

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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.
System modes (Cool only, Heat only, Ventilate) available to the installer are dependent on control
type chosen from BACnet object [MSV1] Control Type. or by toggling the MODE button within one
minute after setting an option command (OPTS) in the Engineering Menu. See section 4.2 Control
Type of this manual). Once the operating mode (Heat only or Cool only) is set by the installer, the
BASstat will stay in that mode exclusively until a two-step control changeover sequence is initiated.
NOTE: a factory reset (rst) will not change the operating mode.
System modes and button operation may be limited by the installer, especially if the thermostat is
completely controlled over BACnet network.
The first tier of operation includes the following settings as shown below. To operate the thermostat:
1. The POWER button toggles between ON or OFF states to start / stop the
thermostat outputs. Turning the unit off with this button will disable the control outputs.
(ON/OFF control can be accomplished over BACnet as well).
2. At power ON, press any button to start the User Mode operation. Press the MODE button
to toggle between heat/cool mode or ventilation only mode.
Press the UP/ DOWN buttons to increase/decrease temperature
setpoint or rotate the values of a setting. Press the FAN button to toggle fan
modes of AUTO or CONTINUOUS. If no AUTO icon is displayed, the fan is in
CONTINUOUS mode and it will run continuously until commanded off using the FAN button
on thermostat or BACnet command. If the AUTO icon is flashing, the fan is operating under
delay timer and will shut off automatically when delay timer expires.
Press the SET button and use UP/ DOWN buttons to toggle
the unit between Occupied or Unoccupied states when outside of scheduled operation.
Use SET or MODE to apply (SET button can be locked in applications forbidding
occupancy state user control).
3. The thermostat will exit the Engineering Menu and return to its normal operating display 10
seconds after the last panel button press.

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User Mode Thermostat
#
Item
Description
Remarks
1
Normal Display
Display current room or set-
point temperature
Use the (SP) parameter in 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.
2
Temperature
Setpoint Setting
using Up/Down
Arrows
Set the desired temperature
The [AV0] / [AV3] Cool / Heat
Occupied and [AV8] / [AV9]
Unoccupied Cool / Heat
temperature setpoints BACnet
objects can be used to write or
force the setpoint to a desired
value from BACnet supervisor.
3
Mode Select
Select the working mode:
Cooling ( )
Heating ( ), or
Ventilating ( )
After pressing the MODE
button, press the UP/ DOWN
button to rotate the selections.
Dependent on Control Type.
4
Fan Auto/
Continuous
Change the Fan mode between
Auto or Continuous.
When AUTO is displayed, the
fan is handled automatically.
When AUTO is flashing, the fan
is working under a delay timer.
When FAN icon is spinning but
AUTO is not displayed, the fan
will run continuously until
commanded off.
5
Occupancy
Setting
Press SET, Used UP and
DOWN arrows to toggle
between the Occupied and
Unoccupied setting. Use MODE
or SET buttons to apply.
The SET button could be
locked for applications
forbidding user occupancy
state control.

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User Mode Flow Chart
4.2. Control Type
The factory default control type is Heating only. The installer must decide the control type suitable
for the application and set it to the desired function. Control type is only configurable by the installer
using Engineering Mode Menu or BACnet supervisor. To change between Heating only and
Cooling only control types via BACnet, first set the “Options” parameter (BACnet point AV37) to a
binary 1 in order to enable the changeover action- then within one minute setting BACnet point
MSV1 to Cooling only (1) or Heating only (2). To change mode locally via the Engineering Menu,
first set the OPts bit to “1”- and allow the Engineering Menu to time out- then QUICKLY press the
MODE button followed by the UP or DOWN button to change mode between heating and cooling
mode. Once the Options (OPts E43, or BACnet point AV37) parameter is set, the operator has one
minute to change the mode (MSV1) between heating or cooling, after which the options parameter
is reset to 0, and the mode is locked.
Occupied Cooling (AV0) or Heating (AV3) set points can be set respectively for cooling only or
heating only control types. This also applies to the Unoccupied Cooling (AV8) or Heating (AV9)
setpoints. Deadband is not applicable in this single mode application.

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Fan Output in Heat Mode
By default, the BASstat thermostat will provide a Fan output signal during heating or cooling cycles.
Local BASstat fan control can be configured from Engineering Menu item (F-Ht) or BACnet object
[BV15] Fan Output For Heating. The default value is “1”. To disable fan control signal output for
heating coming from the BASstat, set this value to “0”. Use this command when the unitary heating
device provides internal control of the supply fan.
Fan Output in Heat Mode
By default, the BASstat thermostat will provide a Fan output signal during heating or cooling cycles.
Local BASstat fan control can be configured from Engineering Menu item (F-Ht) or BACnet object
[BV15] Fan Output For Heating. The default value is “1”. To disable fan control signal output for
heating coming from the BASstat, set this value to “0”. Use this command when the unitary heating
device provides internal control of the supply fan.
Algorithm
• A PID adaptive control algorithm is applied to minimize overshoot, in addition to proportional
band (Stage Width) and derivative (Differential) calculation.
• When the thermostat is active (either the heating or cooling stage is on), a “Working
()” icon will be shown on the LCD.
• Stage 1 operation will show the icon ( ). Stage 2 operation will display ( ).

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System Mode
• The default control type is heating only (2-stage binary or modulating analog).
• Control Type can be selected by setting [MSV1] within one minute after setting menu
item [OPts] or [AV37] to a data “1”. Once set, a factory reset will not affect this
setting.
• Occupied set points and Unoccupied setpoints can be set individually for the
operating (heating or cooling) mode.
• There is an automatic time delay (default 5 minutes) prior to second stage operation
in cooling (set dLyC or AV23) or heating (set dLyH or AV25). This is to prevent
damage to DX cooling or gas heating equipment.
Fan Control Output
• Fan Output for Heating - the fan output for Heat mode is enabled “1” in [BV15] by
default. To let the RTU circuity control the fan during Heat mode – thermostat fan
control can be disabled by setting a “0” for Heat mode if desired [BV15].
• Lowest Fan Speed is the speed the fan will default to after a control action (Heating
or Cooling). If the lowest fan speed [MSV4] is set as “Stop (1)”, the fan will be
automatically shut off after the control action (Heating or Cooling) and a 2-minute fan-
off time delay. During this delay time, the AUTO icon will flash, and the fan will shut off
after the 2-minute time delay expires. If lowest fan speed is set to “Low (2)” the fan
will run continuously after a control action.
• 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. To put the fan in CONTINUOUS mode set to “Low(2)”
this will cause the fan to run continuously (no AUTO icon is displayed). Fan icon
spinning when fan is active. Optionally, the FAN button can be locked to limit user
access to this feature or the BACnet supervisor can be programmed to default the
thermostat to certain state at the end of an occupancy cycle.
Short Cycle and Maximum Cycles per Hour
There are short cycle and maximum cycles per hour protection for both cooling and heating
modes [AV23 – 26] Cooling Short Cycle Delay, Cooling Maximum Cycles per Hour and
Heating Short Cycle Delay, Heating Maximum Cycles per Hour.
• The short cycle time (in minutes) will determine the minimum on time and minimum
off time of each stage before changing its state. The default setting is 3 minutes.
• Maximum cycles per hour will count the number of cycles within one hour. When the
cycle count reaches the maximum cycles in an hour, it won’t allow additional cycles
until the next hour.
• When a stage change is pending due to a Short Cycle Delay or a Maximum Cycle
count, the Clock icon () will appear on the LCD.

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• To disable short cycle checking, set the short cycle to 0 minutes. NOTE: Do not use
this value unless the heating and cooling equipment is equipped with an internal
timer. Damage to equipment may occur.
Minimum Cooling Setpoint and Maximum Heating Setpoint
• Minimum Cooling Setpoint will be confined by set point low [AV-39] default: 18℃/
65℉
• Maximum Heating Setpoint will be confined by set point high limit [AV-40] default:
25℃/ 77℉#
Assigned Current Temperature
• A current temperature value can be assigned through BACnet AV-1 to take place of
the onboard temperature sensor value. The assigned value is valid if BACnet
communication is driving a flip-flop signal to (BV-16: heartbeat signal) within the (AV-
29: Heartbeat Rate time) period (in seconds). Otherwise, the assigned temperature
will revert back to the onboard sensor reading.
Occupancy Setting
There are three ways to define thermostat occupancy state. NOTE: Occupancy will be
detected by ESI contact by default.
• Energy Savings Input (ESI) This is a dry contact input meant for communication from
a customer supplied occupancy sensor. (default)
• Occupancy status (occupied/unoccupied) can be set by a BACnet supervisor using
writable object ESI Contact Definition [BV14]. “0” for occupied, and “1” for
unoccupied. E12/AV18 must be set with a value of 64 (disabled) in advance
(E12/AV18 is set as 0 by default)
• User control of occupancy state is allowed from the SET button if E12/ AV18 Lock
has the ESI Contact disabled. Pressing the SET button and UP/DOWN buttons will
toggle the occupancy state. Press the SET button to confirm. The SET button can
work in conjunction with BACnet occupancy Command [BV14] on a last-write-wins
basis. The SET button could be locked to limit user control (use Lock [AV18] BACnet
object or (LOC) Engineering Menu item to lock SET button). In this case only the
BACnet supervisor can set occupancy states.
• Occupancy Status [BI0] is a read-only BACnet object indicating current occupancy
state -“0” for occupied, and “1” for unoccupied. (AV18 is set as 0 by default).
• When in unoccupied state, a Moon ( ) icon will be displayed on the LCD and the
thermostat will change the set-point temperatures to the Unoccupied Cool and
Unoccupied Heat setpoints [AV8 – 9]. When the state changes back to occupied, the
thermostat will return to the occupied set-point values for Cooling and Heating
Temperature Setpoint [AV0, AV3] and a sunlight icon ( ) will be displayed to
indicate occupied state on LCD.

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4.3. 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. 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.
Operation of Engineering Menu
• At power “ON”, press and hold both the UP and DOWN buttons simultaneously for 5
seconds to enter Engineering Mode menu.
• Press the UP or DOWN buttons to rotate through the menu items. The last item
loops back to the first item at the end of items in menu. Press the MODE button to
enter a submenu item.
• Press the UP or DOWN button to change the setting in the submenu item or hold to
speed up setting value change. Press the MODE button to confirm the setting and
return to the menu item 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.
• 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

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Engineering Menu Items Table
Item
Mnemonic
Description
°C Scale
°F Scale
Step
Default
Range
Defaul
t
Range
E1
db
Deadband
2.0
0~10
4.0
0~18
0.5 (°C/°F)
E2
ESIC
Unoccupied(ESI) cooling set point
28
25~35
82.5
77~95
1.0 (°C/°F)
E3
ESIH
Unoccupied(ESI) heating set point
15
10.0~22.0
59
50.0~72.0
1.0 (°C/°F)
E4
I-t
Integral Time and Output Cycle Time
(seconds)
60
0~500
60
0-500
10 (Sec.)
E5
OPL1
Minimum output voltage in digital value for
AO1
0 (0v)
0~ 125
0 (0v)
0~ 125
1 (LSB)
(0.044V)
E6
SPA1
AO1 Span Offset
0 (0v)
0~ 125
0 (0v)
0~ 125
1 (LSB)
(0.044V)
E7
SP-L
Low limit for temperature set point
10
0~50
50
32~122
1.0 (°C/°F)
E8
SP-H
High limit for temperature set point
35
0~50
95
32~122
1.0 (°C/°F)
E9
OFSt
Current temperature offset
0.0
-10.0~10.0
0.0
-18.0~18.0
0.1 (°C/°F)
E10
Pb
Proportional band or stage width
1.5
0~10.0
3.0
0~18.0
0.1 (°C/°F)
E11
diFF
Stage differential
0.5
0.1~1.0
1.0
0.1~1.8
0.1 (°C/°F)
E12
LOC
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 (dec=16)
5: SET (or ℃/℉) button (dec=32)
6: ESI contact detection (dec=64)
7: Door/Window contact
detection (dec=128)
8: Modification for communication
parameters (dec=256)
i.e., baud rate, MAC addr, device inst.
9: Control DOs by thermostat algorithm
(0) or BACnet sup. (1) (dec=512)
10~15: reserved/unused
Bit Value
0: Unlock / enable
1: Lock / disable
Examples (add dec values to lock multiples)
Unlock/enable all (0)
Lock MODE Button (1)
Lock Down Button (2)
Lock MODE & Down Buttons (3 = 1+2)
Lock Power On/Off button (4)
Lock MODE & Power & Down (7 = 1+2+4)
Lock SET button (32)
Lock MODE & Down & Power & SET (39 =
1+2+4+32)
ESI contact disable (64)
Lock the modification for communication
parameters (256)
DOs control commanded by BACnet (512)
64
0-1023
64
0-1023
1