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BAC-120063CW-ZEC FlexStat 

     4 

Installation and Configuration Guide, Rev. G

Heat Pump Unit (HPU)

Output 

Terminals

Typical 

Terminal 

Codes

HPU Output Connections

BACnet 

Objects

        Analog 9

O. A. Damper (Optional)

AO9

    GND

Ground

(for Analog Output terminals 7–9)

        

Analog 8

Heat or Cool Valve (Optional)

AO8

        

Analog 7

Static Pressure Setpoint (Optional)

AO7

        Relay 6

W2/E

Emergency Heat (Optional)

BO6

    SC 4–6

R

24 VAC (for Relay terminals 4–6)

        Relay 5

W

Auxiliary Heat (Optional)

BO5

        Relay 4

Y2

Compressor 2 (Optional)

BO4

        Relay 3

Y1

Compressor 1

BO3

    SC 1–3

R

24 VAC (for relay terminals 1–3)

        Relay 2

O/B

Reversing Valve 

(see O/B Note in schematic)

BO2

        Relay 1

G

Fan

BO1

NOTE: 

Connections above are for firmware R2.0.0.4 and later. Earlier 

firmware had the optional static pressure setpoint on Analog Output 

9

 instead of Analog Output 

7

, and it did not have the heating/cooling 

coil valve option (Analog Output 8) or outside air damper (economizer) 

option (Analog Output 9).

 APPLICATION
DEGREES SCALE: °F

APP:

OPT: 1 STAGE
ADDITIONAL SETUP
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 Connections

BACnet 

Objects

       IN9

Static Pressure Feedback (Optional)

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.

XEE-6111-050 or XEE-6112-50 Transformer

NOTE: Wire to “O” terminal if

reversing valve is energized in 
cooling mode; wire to “B” 
terminal if reversing valve is 
energized in heating mode.

STE-140x Duct Sensor, Type III

From 
Previous 
Network 
Device

Optional Network

HPU
Terminals

TERMINALS

To
Next 
Network 
Device

Optional Static Pressure Reading/Setpoint from/to CSP-4702

AO7

IN9

GND

Optional Heating/Cooling Coil Valve

GND

AO8

Optional Outside Air Damper

GND

AO9 

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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