FlexStat™ BACnet Programmable Thermostats Application Guide Contents General Information (All Output Configurations)................... 3 Overview and General Installation....................................................................4 Mounting Considerations..................................................................................4 Wiring Considerations.......................................................................................5 Inputs and Outputs...................................
BAC-1xx63/1xxx63 Applications.................................................................51 AHU (Air Handling Unit)........................................................................51 HPU (Heat Pump Unit)...........................................................................52 FCU (Fan Coil Unit), 2-Pipe.....................................................................54 FCU (Fan Coil Unit), 4-Pipe.....................................................................55 RTU (Roof Top Unit)..
General Information (All Output Configurations) This document gives wiring details, schematics of sample applications (including bills of material with KMC Controls products), and other related information for the award-winning FlexStat.
Overview and General Installation Mounting Considerations This document gives wiring details, schematics of sample applications (including bills of material with KMC Controls products), and other related information.
Wiring Considerations The original BAC-10000 series FlexStats (discontinued in August 2013) had three external inputs. Newer BAC-12xxxx/13xxxx/14xxxx FlexStats have six external inputs and are not compatible with the older BAC10000 series backplates. Because of the many connections (power, network, inputs, outputs, and their respective grounds or switched commons), be sure wiring is well planned before installation of conduit! See the respective model’s installation guide for more details.
Inputs and Outputs Connecting Standard Inputs Input Pull-Up Switches 10K Ω Supported input devices include: • • • 0-12 V Active 0–12 VDC devices Passive contacts 10K ohm thermistors (Type III or Type II can be selected using the Inputs menu) ON IN4 IN3 Pushed Left Pushed Right IN2 BAC-1xxxxx EOL and Pull-Up Resistor Switch Positions Pushed Left EOL = ON OFF 1 1 2 2 Be sure pull-up resistor switches are set correctly.
4–20 mA Current Input To use a 4–20 mA current input: 3. Using BACstage or TotalControl, configure the input device type for a 4–20 mA source. 1. Connect an external 250 ohm resistor from input to ground. (Do not install the resistor inside the FlexStat’s case since the heat generated by the resistor may skew the temperature readings.) The resistor converts the 4–20 mA current input to a 1–5 VDC voltage that can be read by the thermostat’s analog-to-digital converter.
Calibrating a (Temperature) Sensor To CHECK space temperature calibration: This section describes checking and calibrating the internal temperature sensor, but other analog sensors can be calibrated in an analogous manner. For maximum accuracy, wait at least a half hour after initial power-up before checking or performing calibration of the INTERNAL temperature sensor! 1. After an initial power-up, wait at least a half hour before calibrating the FlexStat. 2.
To CALIBRATE the space sensor using SOFTWARE (BACstage or TotalControl), navigate to the AI1 input object screen and change the Offset/Calibration value. To CALIBRATE the space sensor from the FlexStat MENU: NOTE: For maximum accuracy after an initial power-up, let the FlexStat warm up for at least a half hour before calibration. 4. Press the Right arrow button until the Main Menu appears and then navigate through the Advanced > Inputs > Space Temp Sensor menus. (Enter a password as needed.) 5.
Filter Weight (Input “Smoothing”) Filter Weight smooths (dampens) input value readings, reducing sensitivity to signal noise and temperature spikes. Smaller filter weight values (more sensitive) cause the sensor readings to react more quickly to sudden changes, and larger values (more stable) cause sensor readings to react more slowly to sudden changes or noise. (See Response Time Examples on page 12.
Infinite Impulse Response (IIR) Filter Input Pin ADC Get Sample 47403 2.17 V Pick Median The second stage in filtering calculates how quickly to respond to temperature changes. This stage is technically a first-order IIR, which is used as a low-pass filter. It calculates the new value based on the old input value plus the current input value, with the old value and the current value each being multiplied by a different weight factor.
In the median filter example above, the value of our first cycle of the median filter was 47241. If the IIR filter had a value of 47239.7329 in its previous calculation, and the filter weight is 6, then when the new median filter output of 47241 is calculated, the new IIR filter’s value is: 47239.7527 = (1–1/64)47239.7329 + 47241(1/64). In this example, a value of 47239.7527 comes out of the IIR filter.
100 80 NOTE: 60 % 40 20 0 0 60 120 180 240 Seconds 300 360 420 The vertical scale on the left represents 0–100% of the full scale of the input. The bottom scale is time in seconds.
Network Wiring Connecting Outputs Connect the device under control between the desired output terminal and the related SC (Switched Common for relays) or GND (Ground for analog outputs) terminal. For each bank of three relays, there is one Switched (relay) Common connection (in place of the GND terminal used with analog outputs).
For MS/TP (EIA-485) communications, connect the –A terminals in parallel with all other –A terminals on the network and the +B terminals in parallel with all other +B terminals. Connect the shields of the cable together at each device. Use a wire nut or the S terminal in KMC BACnet controllers. (FlexStats, however, do not have an S terminal.) Connect the cable shield to a good earth ground at one end only.
Configuration Screens MS/TP Network Wiring Principles Use the following principles when connecting a controller to an MS/TP network: • Use 18 gauge, twisted-pair, shielded cable with capacitance of no more than about 50 picofarads per foot for all network wiring. Belden cable model #82760 meets KMC requirements. • Connect the –A terminal in parallel with all other –A terminals. Connect the +B terminal in parallel with all other +B terminals.
Custom Programming Viewing the Control Basic Programs NOTE: Be sure to CAREFULLY READ ALL of the following Custom Programming sections before attempting to custom program a FlexStat! FlexStat (read-only) programs 1 through 5 contain Control Basic code for: • Program 1: Setpoints and Modes NOTE: Customized programs are the responsibility of the user. KMC Controls does not provide support for such programs.
IF APP_MAIN_TYPE = AHU THEN Modifying the Standard Control Basic Programs GOTO AHU_CODE Programs 1 through 5 and 6 through 10 ELSE IF APP_MAIN_TYPE = RTU THEN Control Basic programs 1 through 5 are used for built-in applications and can NOT be modified directly. Programs 6 through 10 are empty and can be used for additional programming. Using BACstage or TotalControl, a program (1 through 5) can be copied, pasted into a new program code object (6 through 10), edited, and run in place of the original.
Custom Objects Restrictions/Recommendations Programs During Upgrades and Factory Restores The following objects have predefined functions in the firmware and Control Basic. Do not attempt to reuse them for other purposes. NOTE: If custom Control Basic programs are installed and a restore to factory settings is performed, all factory programs are restarted but all custom Control Basic programs are halted.
Sample Custom Applications Adding a Remote Temperature Sensor to an Input For space temperature, the FlexStat uses an internal sensor tied to Analog Input #1. However, a thermistor can also be connected to one of the extra inputs (2 though 4 and 7 through 9) as a remote room temperature sensor. (Not all applications may have extra inputs available—see the Sample Application sections.
Using Another Controller’s Sensors FlexStats can use sensors connected to remote controllers on the same network. For example, an outside air temperature sensor is wired to AI3 of a different networked controller (not a FlexStat) with Device Instance 2010. This program polls the outside air temperature every minute and assigns the value to AV23 in the local FlexStat. If the FlexStat does not have a mapped AV for a desired input (e.g., MAT), use the following approach instead.
point present value (AV27) to AV25 and configure it to auto-run: AV25 = AV27 Displaying the Current Setpoint Method 1 3. Restart the FlexStat. WED 11/19 COOL: OCC: FAN: SET NOTE: 3:20 PM HUM: 43% RH From the Home (temperature display) screen, press the Up or Down arrow button ONCE to view the current setpoint. (Pressing it more than once will change the setpoint and start the override mode.) The setpoint will display for approximately ten seconds.
Displaying Outside Air Temperature Displaying Other Objects At the bottom right of the Home screen is an WED 11/19 3:20 PM area that can display several object Present COOL: Values. In models with the built-in space OCC: FAN: relative humidity sensor, the relative humid- ity is automatically displayed. The outside air OUTSIDE: 56° F temperature sensor can also be displayed (assuming a sensor is attached to Input #4 in AHU and RTU applications). Firmware R2.0.0.
Mapping Analog Inputs or Outputs as Binary Motion Sensor Applications The analog inputs can be mapped as binary values in Control Basic (using BACstage or TotalControl). Set an analog voltage less than 0.5 VDC to equal a binary Off state and an analog voltage of 0.5 to 12 VDC to equal a binary On state. To turn occupancy on (or retrigger) for a set time after the LAST motion detection (during a scheduled “off” time), see Customizing the Motion Sensor and Override on page 34.
CO2 Sensors and DCV “Standard” BAC-1xxxx or BAC-12xxxx FlexStat without CO2 Sensor the ventilation based on preset worst-case scenarios, DCV continuously controls ventilation based on real-time actual needs. This produces substantial energy and cost savings...especially for facilities with highly variable occupancy, such as meeting rooms, classrooms, theaters, gyms, retail stores, and hotels.
CO2 Sensor Calibration The BAC-13xxxx models do not have a calibration with gas option. They use Automatic Background Logic, or ABC Logic™, a patented self-calibration technique designed to be used in applications where concentrations will drop to outside ambient conditions (approximately 400 ppm) at least three times in a 14 day period, typically during unoccupied periods.
8. From the FlexStat’s Main Menu, select the Advanced > CO2 Sensor > Calibration menu. or buycalgas.com) for attaching a regulator and tube to a cylinder of reference gas. 2. On the FlexStat, turn the hex screws in the bottom and top clockwise until they clear the cover. 9. Enter the elevation and ppm of the reference gas used. (Elevation for any particular location can be found at such sources as www.earthtools.org.) 3. Carefully pull the FlexStat cover away from the backplate (mounting base). 10.
Custom Web Graphics When creating web graphics pages in TotalControl or BACstage, the following objects are the most commonly used. NOTE: To prevent locking out the FlexStat’s user interface and programs, be careful about writing to correct priority levels. See the *(8) and *(9) notes in the illustration below. If locking out the FlexStat’s user interface is desired, write to a higher priority level (i.e., 7/8) from the web interface.
Hospitality and Locked User Interface Modes Selecting UI Modes NOTE: If this new feature does not work (is “Inactive”) after upgrading the firmware (especially from R1.3.0.4 or earlier), you may need to restore the factory default (especially if there is custom programming or configuration in the FlexStat) and reconfigure the FlexStat. See the FlexStat Operation Guide for information.
Reverting UI Modes Via the User Interface Via BACstage or TotalControl Reverting to Standard mode can be done through the FlexStat’s user interface with a combination of button presses or by changing MSV9’s values through BACstage or TotalControl. To revert to Standard mode through the user interface, follow these steps to access the hidden menus: To revert to Standard mode through BACstage or TotalControl: 1.
Resetting Hospitality Mode Setpoints to Defaults Hospitality Setpoint Principles AV4@8 = 78 : REM UNOCC COOLING SETPT In Hospitality mode, users have continuing control over single, occupied, and unoccupied setpoints: AV5@8 = 66 : REM UNOCC HEATING SETPT • • AV4.RELINQUISH_DEFAULT = AV4 AV5.RELINQUISH_DEFAULT = AV5 Under the Single Setpoint option, the setpoint will remain at whatever value was last selected by a user until a user adjusts the setpoint again. AV20@8 = 74 : REM OCC COOLING SETPT AV20.
Programming Custom Text for Hospitality Mode When BV Present Value = 1, Corresponding Icon Animates On the Home screen, menu items (“state” text) for Fields A, B, and C appear to the left of the associated icon (if any). The displayed state text is limited to seven characters for A and B and ten for C.
Motion/Occupancy Sensor Performance and Applications 32.8 ft (10 m) For any FlexStat model with a (passive infrared) motion/occupancy sensor option, be sure to install it where it will have an unobstructed view of the most typical traffic area. Do not install it behind curtains or other obstructions. Do not install it where it will be exposed to sunlight or heat sources! Do not install near a heating/cooling duct. X Y Side View 46.
Enabling/Disabling the Sensor and Override Time Customizing the Motion Sensor and Override In relevant models, the motion sensor may be used to trigger occupancy override. The sensor function is enabled or disabled from the Motion Sensor menu (firmware version R1.2.0.6 and later). When the occupancy sensor function is disabled from the menu, the built-in applications will not use it. Even then, however, the sensor input (BI6) can be read and used in a custom program.
Adding a Door Contact for Additional Control NOTE: Limits of Using Motion Sensors Alone When occupancy is determined by a motion sensor alone in hotel rooms or small offices, lack of observable motion (while a person is sleeping or behind obstructions) will incorrectly place the FlexStat in unoccupied mode. Providing additional control logic via a door switch contact (wired to an available input on the FlexStat) allows the room to remain identified as occupied even though no motion is sensed for some time.
Adding Remote Motion Sensors Situations that would need remote sensors to be connected to the FlexStat include: • Areas too large for adequate coverage by the FlexStat’s built-in sensor. • Areas with obstructions that block sensor coverage. • Use of FlexStat models that do not have a built-in sensor. Menu Configuration NOTE: NOTE: If IN2 or IN9 is used for the input, configure it as “Not Used” in the Sensor Setup menu.
NOTE: This program will work with the built-in motion sensor enabled or disabled. It will also work with FlexStat models that have no built-in motion sensor. Support NOTE: See important information about custom programming in Custom Programming on page 17. FlexStats come with a printed Installation Guide. The latest support files for the FlexStat are always available on the award-winning KMC Controls web site (www. kmccontrols.com). You may need to log-in to the Partners site (https://partners.
BAC-1xx63/1xxx63 Series (6 Relays and 3 Analog Outputs) This section is specific to the BAC-1xx63/1xxx63 series (with 6 relays and 3 analog outputs). Model numbers with the additional digit (BAC12xxxx, 13xxxx, and BAC-14xxxx) have three additional inputs and options for CO2 sensing (BAC-13xxxx and BAC-14xxxx) and IP network connections (BAC-1xxxxxE). NOTE: See also the FlexStat Catalog Supplement and Selection Guide (SP-091).
Bills of Materials (BAC-1xx63/1xxx63) This section contains BOMs for the sample installation diagrams in the corresponding sections of the BAC-1xx63 and BAC-1xxx63 installation guides. See those documents for detailed drawings and input/output connections as well as other important installation information.
HPU (Heat Pump Unit)— 1 or 2 Compressors w/ Aux. & Emergency Heat RTU (Roof Top Unit)—1 or 2 Heat and 1 or 2 Cool BILL OF MATERIALS: HPU, 1/2 Compressors w/ Aux.
FCU (Fan Coil Unit)—2 or 4 Pipe, Modulating or 2 Position BILL OF MATERIALS: FCU, 2-Pipe, 2-Position REFERENCE KMC PART # FLEXSTAT BAC-1xx63/ 1xxx63 R1, R2, R3 VLV BILL OF MATERIALS: FCU, 4-Pipe, 2-Position PART DESCRIPTION REFERENCE KMC PART # PART DESCRIPTION BACNET THERMOSTAT, 6 RELAY & 3 ANALOG OUTPUTS FLEXSTAT BAC-1xx63/ 1xxx63 BACNET THERMOSTAT, 6 RELAY & 3 ANALOG OUTPUTS REE-3211** MULTI-VOLTAGE CONTROL RELAY, 1.2 VA R1, R2, R3 REE-3211** MULTI-VOLTAGE CONTROL RELAY, 1.
Sequence of Operation (BAC-1xx63/1xxx63) The FlexStat controls its output operations based on two setpoints, active heating setpoint and active cooling setpoint. Under normal, nonoverride operation, these setpoints are set, based on the current schedule state being on, to either the occupied heating and occupied cooling setpoints. If the present schedule state is off, then the active heating and active cooling setpoints are set to the unoccupied heating and unoccupied cooling setpoints.
heating setpoint. If the space temperature rises above the active cooling setpoint, the heating/cooling mode is set to cooling. expire upon the next normal scheduled change of state of the scheduled occupied mode. The following two examples illustrate this operation. For both examples, assume the override timer is set to zero and the scheduled occupied mode is on at 8:00 AM and off at 5:00 PM: The heating/cooling mode can also be manually set by adjusting the “System Mode” through the user interface.
Econ Minimum Position is held to zero as ventilation is not needed until scheduled occupancy begins. Optimum Start NOTE: Optimum Start was added in firmware ver. R2.0.0.9. Optimum Stop calculates the time before the scheduled off time that the space temperature (without heating or cooling) may be allowed to “drift” without exceeding the setpoint proportional band or span. (Normal ventilation will continue until the scheduled off time.
Fan Control Sensor 2 (Fan Status or Discharge Air Temp) The following is the base sequence for fan operation. An option, Sensor 2, determines the use of analog input #2. If sensor 2 is configured for fan status, the FlexStat performs the fan control sequence as described above. If sensor 2 is configured for discharge air temp, the FlexStat configures analog input #2 for a 10K type III thermistor. This selection is intended for monitoring discharge air temperature of the HVAC unit.
OAT Econ Loop “P” factor 65 15 53 15 50 15 45 22.5 40 30 30 30 DCV (Demand Controlled Ventilation)—General Information NOTE: See also CO2 Sensors and DCV on page 25. In addition to the Economizer option, BAC-12xxxx/13xxxx/14xxxx models have the Demand Control Ventilation (DCV) option available. DCV combines several options and modes into efficiently controlling the outside air damper . DCV is enabled by setting DCV to one of the three configurations.
*NOTE: The CO2 sensors in the BAC-13xxxx series FlexStats (as well as properly configured SAE-10xx CO2 detectors) have been certified to comply with CA Title 24, Section 121(c), as well as subparagraph 4.F that specifies accuracy will be maintained within tolerance for a minimum of 5 years without recalibration. See the data sheet for more information. • NOTE: The three DCV Configuration graphs show the DCV component of the signal to the outside air damper.
DCV—Advanced Configuration 100% Normal Ventilation During occupied mode, unless conditions warrant a different DCV mode, the default Ventilation mode is NORMAL (after Pre-purge, Startup, or Recovery modes have finished and returned the ventilation rate to “normal” operation). During Normal ventilation mode, the damper modulates between OA Area (2% default) and OA Full (5% default) as follows with an increase above OA Full as described below.
tration at the end of the last fan operation period to CO2 Max and the allowed ventilation rate for this fan cycle. Should there be a continued call for heating or cooling after the recovery period is complete, Ventilation mode shall return to NORMAL. Fan Recov Timer = 3 min + [(Fan Off Timer + 5) * Fan Recov Ratio] NOTE: Whenever the supply fan stops, Space CO2 is recorded (Space CO2 Last) at the time the fan stops.
3. During STANDBY mode, the outside damper shall be closed. During Night Flush mode, Econ Mode is ENABLED and the fan is called for to run. 4. Upon leaving STANDBY mode and returning to NORMAL, the active heating and cooling setpoints return to normal following the same 1° F per 15 minute rate as described in the Standby mode sequence described above. Fan Off Timer resumes incrementing as normal.
If the humidifier valve is set to two-position, then the humidifier valve opens if the space humidity falls below the space humidity setpoint and closes if the space humidity rises above the space humidity setpoint plus the humidity span. BAC-1xx63/1xxx63 Applications AHU (Air Handling Unit) The humidifier valve closes any time the fan status is determined to be “off.
Economizer Control Fan off delays apply as previously described. If the AHU application is configured for the economizer option, the economizer sequence described in the Common Features section is followed. Reversing Valve The reversing valve can be configured through the user interface to be energized on a call for heating (“B” function) or energized on a call for cooling (“O” function).
temperature above the active heating setpoint minus one half the heating proportional band, the second stage of compressor will be de-energized. Upon further rise in temperature above the active heating setpoint, the first stage of compressor will be de-energized.
cooling water is available and there is a call for heating), another flag indicating opposite water available is started. If the unit goes into “opposite water available” mode and the unit remains calling for the same temperature mode (heating or cooling), every fifteen minutes (or as set in opposite water timer) the unit will reinitiate the water evaluation mode. If neither heating nor cooling water is available, the water evaluation mode is run every ten minutes (or as set in min eval timer).
FCU (Fan Coil Unit), 4-Pipe Valve Control Fan Control The method of controlling the heating and cooling valves is based on the fan configuration as well as the valve configuration: The fan follows the base sequence for fan operation as listed in the FlexStat (All Models) Common Features section above with the following modifications. When the fan runs, whether in “Auto” or “On” mode, the fan speed is determined by the Fixed Speed setting.
cooling setpoint plus the cooling proportional band AND the first stage of cooling has been energized for at least the stage delay AND the second stage of cooling has been off for at least the minimum off time, the second stage of cooling will be energized. Upon decrease in space temp below the active cooling setpoint plus one half the cooling proportional band, the second stage of cooling shall be de-energized.
BAC-1xx36/1xxx36 Series (3 Relays and 6 Analog Outputs) This section is specific to the BAC-1xx36/1xxx36 series (with 6 relays and 3 analog outputs). Model numbers with the additional digit (BAC12xxxx, 13xxxx, and BAC-14xxxx) have three additional inputs and options for CO2 sensing (BAC-13xxxx and BAC-14xxxx) and IP network connections (BAC-1xxxxxE). NOTE: See also the FlexStat Catalog Supplement and Selection Guide (SP-091).
Bills of Materials (BAC-1xx36/1xxx36) AHU (Air Handling Unit)—Multiple H/C Options NOTE: See the corresponding BAC-1xx36 or BAC-1xxx36 Installation Guide section for detailed drawings and input/output connections as well as other important installation information. BILL OF MATERIALS: AHU, 1 Heat and 1 Cool REFERENCE KMC PART # PART DESCRIPTION FLEXSTAT BAC-1xx36/ 1xxx36 BACNET THERMOSTAT, 6 RELAY & 3 ANALOG OUTPUTS R1 REE-3211** MULTI-VOLTAGE CONTROL RELAY, 1.
BILL OF MATERIALS: AHU, 1 or 2 Heat and Modulating Cool BILL OF MATERIALS: AHU, Modulating Heat and 1 or 2 Cool REFERENCE KMC PART # PART DESCRIPTION REFERENCE KMC PART # PART DESCRIPTION FLEXSTAT BAC-1xx36/ 1xxx36 BACNET THERMOSTAT, 6 RELAY & 3 ANALOG OUTPUTS FLEXSTAT BAC-1xx36/ 1xxx36 BACNET THERMOSTAT, 6 RELAY & 3 ANALOG OUTPUTS R1 REE-3211** MULTI-VOLTAGE CONTROL RELAY, 1.2 VA R1 REE-3211** MULTI-VOLTAGE CONTROL RELAY, 1.
FCU (Fan Coil Unit)—2 or 4 Pipe, Modulating BILL OF MATERIALS: AHU, Modulating Heat and Modulating Cool REFERENCE KMC PART # PART DESCRIPTION FLEXSTAT BAC-1xx36/ 1xxx36 BACNET THERMOSTAT, 6 RELAY & 3 ANALOG OUTPUTS R1 REE-3211** MULTI-VOLTAGE CONTROL RELAY, 1.
Sequence of Operation (BAC-1xx36/1xxx36) NOTE: This information reflects firmware version R2.0.0.13 or later (but specifications are subject to change). If the fan control type is set to “variable,” then the following sequence applies. When the fan runs, whether in “Auto” or “On” mode, the fan speed is determined by the Output Speed setting. If the Output Speed setting is set to “fixed,” then any time the fan is called for, it will run at the speed designated by the Fixed Speed setting.
• With the fan mode set to “Auto,” the heating valve will open 100% if the space temperature falls below active heating setpoint minus heating proportional band and fully close when space temp rises above active heating setpoint. The cooling valve similarly opens 100% if the space temp rises above the active cooling setpoint plus cooling proportional band and fully closes if the space temp falls below the active cooling setpoint. band, the second stage of heating will be deenergized.
OA damper shall modulate to maintain 53.0° F (11.7° C) until the space temp reaches the cooling setback setpoint at which point it shall close. If at any time during unoccupied mode the economizer mode is disabled based on OAT, the outside air damper will close. Economizer Control If the economizer option is enabled, the economizer mode is determined by comparing outside air temperature (OAT) to the economizer enable temperature. The economizer mode is enabled if the OAT is 1.0° F (0.
of water is needed (e.g., cooling water is available and there is a call for heating), another flag indicating opposite water available is started. If the unit goes into “opposite water available” mode and the unit remains calling for the same temperature mode (heating or cooling), every fifteen minutes (or as set in opposite water timer) the unit will reinitiate the water evaluation mode.
occupancy mode is set to constant or “On,” the valves function in a modulating fashion. Actual response may vary slightly due to PI action of the control loops, but generally, the heating valve will start to open as the space temperature drops below the active heating setpoint and modulate to fully open when space temperature reaches active heating setpoint minus heating proportional band.
BAC-1xx30 Series (3 Relays and 0 Analog Outputs) This section is specific to the BAC-1xx30 series (with 3 relays and 0 analog outputs). NOTE: See also the FlexStat Catalog Supplement and Selection Guide (SP-091). Outputs NOTE: IN1 is the room temp.
Bills of Materials (BAC-1xx30) AHU (Air Handling Unit)—1 Heat and 1 Cool HPU (Heat Pump Unit)—1 Compressor BILL OF MATERIALS: AHU, 1 Heat and 1 Cool BILL OF MATERIALS: HPU, 1 Compressor REFERENCE KMC PART # PART DESCRIPTION REFERENCE KMC PART # PART DESCRIPTION FLEXSTAT BAC-1xx30 BACNET THERMOSTAT, 3 RELAYS FLEXSTAT BAC-1xx30 BACNET THERMOSTAT, 3 RELAYS DAT STE-1402 DUCT TEMPERATURE SENSOR DAT STE-1402 DUCT TEMPERATURE SENSOR FST CSE-1102 AIR DIFFERENTIAL PRESSURE SWITCH, 0.
Sequence of Operation (BAC-1xx30) For common features, see FlexStat (All Models) Common Features on page 42 For HPU applications, see relevant sections in HPU (Heat Pump Unit) on page 52 For AHU, Heating Unit, and Cooling Unit applications, see relevant sections in Sequence of Operation (BAC-1xx36/1xxx36) on page 61 BAC-1xx30 Series (3 Relays and 0 Analog Outputs) Section 68 Application Guide S
BAC-1xxx53 (5 Relays, 1 Triac, & 3 Analog Outputs) This model is available for OEM applications with this specific compressor. providing 5–100% variable capacity control over the full range of cooling demand in a multiple compressor (tandem) application. The BAC-120053CW FlexStat is a 5-relay, 1-triac, and 3-analog-output controller with special firmware that is used to control the Copeland Scroll® Digital™ compressor. (See www.EmersonClimate. com.
Index Symbols C D 2-Pipe: 41, 54, 60, 64 2-Position: 41 3 Relays, 6 Analog Outputs: 57 3 Relays and 0 Analog Outputs: 66 4-20 mA Inputs: 7 4-Pipe: 41, 55, 60, 65 5 Relays, 1 Triac, and 3 Analog Outputs: 69 6 Relays, 3 Analog Outputs: 38 Calibration Analog Sensors: 8 CO2 Sensor (Gas): 26 Temperature Sensor: 8 CA Title 24: 46, 47 CO2 Sensor: 25, 46 Code Common: 18 Control Basic: 17 Common Code: 18 Compressor Copeland Scroll Digital: 69 Staging (HPU): 52 Conductor Size and Number: 5 Conduit: 5 Configuratio
G L Gas, Calibration (CO2): 26 GE Telaire 2075 (CO2 Calibration Kit): 26 GND.
S T SAE-10xx CO2 sensors: 25 SC. See Switched Common Sensor Connected to Another Controller: 21 Filter Weight: 10 Motion/Occupancy: 33, 36 On Another Controller: 21 Remote Motion/Occupancy: 36 Temperature: 8 Sequence of Operation: 42, 61, 68 Setpoints: 22, 28, 42 Space Temp.
