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BAC-120063CW-ZEC FlexStat 

     5 

Installation and Configuration Guide, Rev. G

Connections and Wiring

Wiring Considerations

•  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!

•  Make sure that conduit for all wiring has ad-

equate diameter for all necessary wiring. Using 

1-inch conduit and junction boxes is recommend-

ed! Use external junction boxes above the ceiling 

or in another convenient location as needed 

to make connections that run to the FlexStat’s 

junction box.

•  To prevent excessive voltage drop, 

use a conduc-

tor size that is adequate for the wiring length! 

Allow plenty of “cushion” to allow for tran-

sient peaks during startup.

•  Using multiple conductor wires for all relevant 

inputs and outputs  is recommended. Grounds 

for all the inputs can be combined on one wire.

 CAUTION

To avoid damage from ground loops and other 
communication issues in networked FlexStats, 
correct phasing on MS/TP network and power 
connections on ALL the networked controllers is 
critically important.

Illustration 5—Terminals and Connections

 CAUTION

Relays are for Class-2 voltages (24 VAC) only. Do not 
connect line voltage to the relays!

IN9
IN8

GND

IN7 

+B

 –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

(Wir

ing Cutout in Bac

kplate)

 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 terminal and the related 

SC (Switched Com-

mon for relays) or GND (Ground for analog outputs)

 

terminal. (See Illustration 5).

Optional

 connections (for firmware R2.0.0.4 and later) 

are:
•  A 

static pressure

 setpoint signal to a CSP-4702 

pressure controller used with the system for 

pressure bypass control on AO7. (Earlier firmware 

had it on AO9 instead.) The static pressure feed-

back signal is on AI9. The setpoint value can be 

changed in the Setpoints menu.

• 

Outside air damper

 (economizer) on AO9 with 

the Additional Setup menu options of None, 

Modulating, Disable/Enable. Connect to AO9 for 

modulating or (on RTU only) BO6 for enable/

disable.

•  A modulating valve on a 

hot or cold water coil

 on 

AO8. This can provide primary or supplemental 

modulating heating or cooling to the staged 

heating or cooling. The Additional Setup menu 

options for actuator device type are 0–10, 10–0, 

2–10, or 10–2 VDC.

 CAUTION

Do not mistakenly connect 24 VAC to an analog 
output ground. This is not the same as a relay’s 
switched common. See the backplate’s terminal 
label for the correct terminal.

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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