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BAC-120063CW-ZEC FlexStat 

     6 

Installation and Configuration Guide, Rev. G

NOTE:

  Type II or III 10K ohm thermistors can be 

selected by changing the menu setting in 

ADVANCED > INPUTS

 

(see 

Configuration 

and Operation on page 7

).

NOTE:

  FlexStat inputs do not support 1K ohm 

RTDs.

Power Connection

Connect a KMC Controls 24 volt, Class-2 transformer 

to the power terminals on the FlexStat’s backplate:
1.  Connect the transformer’s 

neutral

 lead to the 24 

VAC 

Common/–/C

 terminal. (See Illustration 5.)

2.  Connect the AC 

phase

 lead to the 24 VAC 

Phase/

~

/R

 terminal.

Power is applied to the FlexStat when the trans-

former is powered.
KMC Controls recommends powering only one con-

troller/thermostat from each transformer. If installing 

a FlexStat in a system with other controllers/thermo-

stats powered from a single transformer, however, 

phasing must be correct and the total power drawn 

from the transformer must not exceed its rating.

Network Wiring

For an MS/TP network, use a three-conductor cable 

(Belden cable #82760 or equivalent):
1.  Connect the 

–A

 terminals in parallel with all 

other 

–A

 terminals on the network. (See Illustra-

tions 2 through 5.)

2.  Connect the 

+B

 terminals in parallel with all 

other 

+B

 terminals.

3.  Connect the shields of the cable together at each 

device. Use a wire nut at the FlexStat or the 

S

 

terminal in KMC BACnet controllers. Connect 

the cable shield to a good earth ground at 

one 

end only

.

NOTE:

 The 

S

 terminal in KMC controllers is 

provided as a connecting point for the 

shield. The terminal is not connected to the 

ground of the controller. When connecting 

to controllers from other manufacturers, 

verify the shield connection is not 

connected to the controller’s ground.

NOTE:

  For more information on principles and 

good 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 draws current exceeding 

the FlexStat’s output capacity:
•  Maximum output current

 for individual 

ANA-

LOG outputs (7–9) is 20 mA @ 12 VDC (each).

•  Max. output current is 1 A for individual RE-

LAYS @ 24 VAC/VDC or a total of 1.5 A per bank 

of 3 relays

 (relays 1–3 and 4–6).

Input Connections

Passive input devices require pull-up resistors in the 

circuit. For a 

passive

 input device (a 

DAT

 10K ohm 

thermistor on IN2), set (if not in the default position) 

the pull-up switches on the back of the circuit board 

to the 

10K ohm

 position, with the upper switch to the 

left and lower switch to the right. (See Illustration 8.)

NOTE:

 

IN2 must also be configured in the menu for 

DAT.

 See 

Configuration and Operation on 

page 7

.

For an 

active

 voltage device (optional 1–5 VDC static 

pressure reading from a 

CSP-4702

 on IN9), set the 

switches to the 

0–12 VDC

 position, with the upper 

switch to the right and lower switch to the left.

NOTE:

  Unlike the EOL switch pairs, the 

INPUT 

switch pairs must NOT have both switches 

set to the same direction

—if one of the 

pair’s switches is set to the left, for example, 

the other must be set to the right (or vice 

versa). 

ALL the input pull-up resistor 

switch pairs must be fully latched in either 

10K Ohm or 0–12 VDC position even if 

a switch pair has no input connected!

 A 

single incorrect switch position may cause 

errors in multiple inputs.

Illustration 6—Switched (Relay) Common and Relays

  

Relay 3 

(

or 6

)

SC (Phase) 1–3 

(

or 4–6

)

  Relay 2 

(

or 5

)

  Relay 1 

(

or 4

)

One Switched 
Common 
Connection 
Per Bank of 
Three 
Normally 
Open Relays

Содержание FlexStat BAC-120063CW-ZEC

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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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