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BAC-120063CW-ZEC FlexStat 

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Installation and Configuration Guide, Rev. G

Installation and Configuration Guide

BAC-120063CW-ZEC FlexStat

Zoning Equipment Controller  

Contents ..................................................................1
Mounting ................................................................1
Application Overview .............................................2

Roof Top Unit (RTU) ................................................ 3
Heat Pump Unit (HPU) ........................................... 4

Connections and Wiring ..........................................5

Wiring Considerations .........................................5
Output Connections ............................................5
Input Connections ...............................................6
Power Connection ...............................................6
Network Wiring ..................................................6
Network EOL (End-Of-Line) Termination ............7

Configuration and Operation ..................................7

Configure the Application and Address ...............7
Setpoints .............................................................8
Heat/Cool, Fan, Occupancy, and Override .........9
Schedules ............................................................9
Trends .................................................................9

Sequence of Operation .........................................10

Zone Hysteresis (Changeover) ...........................10
Zone Status .......................................................10

Troubleshooting ....................................................11
Maintenance .........................................................11
Customization .......................................................11
Remote (BAC-5051E) Interface .............................11
IoT (KMC Commander) Interface ..........................12
Additional Resources ............................................12
Important Notices .................................................12

Mounting

Contents

1.  Complete rough-in wiring at each location prior 

to the FlexStat’s installation. Cable insulation 

must meet local building codes.

 CAUTION

To prevent mounting screw heads from touching 
the circuit board in the thermostat, use only the 
mounting screws supplied by KMC Controls. 
Using other screws may damage the FlexStat. 
Do not turn screws in farther than necessary to 
remove the cover.

2.  If the cover is locked on the backplate, turn the 

hex screws in the bottom and top of the FlexStat 

CLOCKWISE

 until they (just) clear the cover. 

(See Illustration 1.) Pull the cover away from the 

backplate (mounting base).

3.  Route the wiring through the backplate.
4. 

With the embossed “UP” and arrows toward the 

ceiling,

 fasten the backplate to a wall electrical 

box. This FlexStat mounts directly on 

vertical

 2 x 

4 inch boxes but requires an HMO-10000W wall 

mounting plate for horizontal or 4 x 4 boxes.

5.  Make connections to the terminal blocks. (See 

Connections and Wiring on page 5

.)

6.  Push the FlexStat cover over the backplate 

while 

being careful not to pinch or dislodge any 

wiring

. Back the hex screws (

counterclockwise

out of the brackets until they engage the FlexStat 

cover and hold it in place.

Illustration 1—Dimensions and Installation

A

B

EIA-485 data 

port (for quick 

network access)

Terminal blocks 

on backplate 

Dimensions in Inches (mm)

A

B

C

1.125 (29)

5.551 (141)

4.192 (106)

Cover locking hex screws

Embossed “UP” indicator

C

NOTICE

OBSERVE PRECAUTIONS 

FOR HANDLING

ELECTROSTATIC

SENSITIVE DEVICES

Summary of Contents for FlexStat BAC-120063CW-ZEC

Page 1: ...mounting screws supplied by KMC Controls Using other screws may damage the FlexStat Do not turn screws in farther than necessary to remove the cover 2 If the cover is locked on the backplate turn the hex screws in the bottom and top of the FlexStat CLOCKWISE until they just clear the cover See Illustration 1 Pull the cover away from the backplate mounting base 3 Route the wiring through the backpl...

Page 2: ...or Ethernet Cable Up to 75 Feet Long MS TP Network STE 8x01 Room Temp Sensor and Configuration Tool Supply Air to Room Supply Air from RTU Zone 1 MAC 3 Device Instance 1000001 RTU Controller MAC 20 Device Instance 1000000 Zone 16 MAC 19 Device Instance 1000016 Illustration 2 Sample Networked RTU Installation CSP 4702 To HI Port DAT Displayed Roof Top Unit RTU Supply Air Return Air STE 140x Temp Se...

Page 3: ...tional AI9 IN8 Unused in this application AI8 IN7 Unused in this application AI7 IN4 Unused in this application AI4 IN3 Unused in this application AI3 GND Ground IN2 DAT AI2 NOTE The DAT sensor is configured for IN2 in the ADVANCED APPLICATION ADDITIONAL SETUP SENSORS menu NOTE Although typical terminal code letters are shown check the schematics of your unit for wiring details CAUTION Relays are ...

Page 4: ...UP ZONE HEAT PUMP 1 or 2 Compressors with Auxiliary and Emergency Heat NOTE Although typical terminal code letters are shown check the schematics of your unit for wiring details CAUTION Relays are for Class 2 voltages 24 VAC only Do not connect line voltage to the relays Do not mistakenly connect 24 VAC to an analog output ground Illustration 4 HPU Application Connections Input Terminals HPU Input...

Page 5: ... A IN4 IN3 GND IN2 Common C Phase R Analog 9 GND 7 9 Analog 8 Analog 7 Relay 6 SC 4 6 Relay 5 Relay 4 Relay 3 SC 1 3 Relay 2 Relay 1 Outputs Wiring Cutout in Backplate MS TP Network Inputs 24 VAC Wiring is dependent on application Inputs NOTE IN1 and IN5 6 are reserved for internal sensors NOTE SC Switched relay Common Output Connections Connect the device under control between the desired output ...

Page 6: ...od practices when connecting an MS TP network see Planning BACnet Networks Application Note AN0404A For the bank of three relays there is one Switched relay Common connection in place of the GND ter minal used with analog outputs See Illustration 6 For the relay circuit the phase side of the AC should be connected to the SC terminal FlexStat relays are NO SPST Form A Do not attach a device that dr...

Page 7: ...figuration and Operation Illustration 9 FlexStat Display and Button Functions Right Menu Left Override Down Up NOTE For additional information see the relevant parts of the Configuration section in the FlexStat Operation Guide but not all things apply to this model NOTE Settings and adjustments may require a password DAT Zone Information of Zones of Zones Calling for Cooling and of Zones Calling f...

Page 8: ...tem is stand alone address the FlexStat for MAC 20 Device Instance 1000000 See Illustration 2 To set the FlexStat s BACnet Device Instance and optionally name and location 1 Select ADVANCED enter password if needed and then DEVICE 2 Change or confirm INSTANCE to 1000000 DEVICE INSTANCE NAME ZEC_FlexStat_1 LOCATION KMC Controls 1000000 To configure the MAC address from the Main Menu select ADVANCED...

Page 9: ...Number of calls for heating AV25 at 1 minute intervals from SimplyVAVs 7 Duct static pressure AV103 at 1 minute intervals from an optional CSP 4702 8 Duct static pressure setpoint AV104 at 1 minute SETPOINTS COOL DAT SETPOINT HEAT DAT SETPOINT 130 F DUCT ST STPT 0 5 in H2O 55 F The optional duct static pressure setpoint is also in this menu NOTE The airflow minimum limit in each SimplyVAV controll...

Page 10: ...ns for each zone s values are Call for Cooling Call for Heating No Call for Either Sequence of Operation NOTE The HPU and RTU sections of the FlexStat Application Guide have some basic generic information about HPU and RTU operation The BAC 120063CW ZEC FlexStat determines RTU HPU heating or cooling mode by majority rule of the number of heating and cooling calls from the SimplyVAV controllers If ...

Page 11: ...hangeover on page 10 See also Sequence of Operation on page 10 See the relevant parts of the Troubleshooting section in the FlexStat Operation Guide Maintenance Remove dust as necessary from the holes in the top and bottom Clean the display with a soft damp cloth and mild soap Customization Additional customization can be done using KMC Connect KMC Converge or TotalControl For ex ample a fan statu...

Page 12: ...rmation about this model FlexStat on the BAC 120063CW ZEC web page For general operation configuration troubleshoot ing and other information see the generic FlexStat Operation Guide and FlexStat Application Guide See also the BAC 8000 series for information about the VAV controller actuators See also the CSP 4702 page for information about the differential pressure controller actuator For remotel...

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