KMC Controls FlexStat BAC-120063CW-ZEC Installation And Configuration Manual

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Page 1

BAC-120063CW-ZEC FlexStat

Zoning Equipment Controller

Installation and Conﬁguration Guide

MountingContents

™

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

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 boom 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.

Embossed “UP” indicator

Additional Resources ............................................12

Important Notices ................................................. 12

NOTICE

OBSERVE PRECAUTIONS

FOR HANDLING

ELECTROSTATIC

SENSITIVE DEVICES

Illustration 1—Dimensions and Installation

BAC-120063CW-ZEC FlexStat 1 Installation and Conﬁguration Guide, Rev. G

A B C

1.125 (29) 5.551 (141) 4.192 (106)

EIA-485 data

port (for quick

network access)

Terminal blocks

on backplate

Cover locking hex screws

Dimensions in Inches (mm)

Page 2

Application Overview

Return Air

Supply Air from RTU

Optional Bypass Damper

MS/TP Network

24 VAC

Roof Top Unit

(RTU)

CSP-4702

To HI

Port

Optional Static Pressure Signal and Setpoint

STE-140x

Temp

Sensor

Input from DAT

Output to RTU

SSS-101x Flow Sensor

1/4"

Tubing

Displayed

RTU Controller—MAC 20, Device Instance 1000000

VAV B ox

SSS-101x Flow

Sensor

STE-140x Temp

Sensor

Supply Air

To Low Pressure Port

on Pitot Tube

to H or L Port on

SSS-100x Sensor

(Mounted Perpendicular

to Air Flow)

MS/TP Network

DAT

FlexStat

Supply Air

to Room

Supply Air from RTU

1/4" Tubing

Ethernet Cable (Up to 75 Feet Long)

STE-8x01 Room Temp Sensor

and Configuration Tool

Zone 1—MAC 3, Device Instance 1000001

MS/TP Network

SSS-101x Flow

Sensor

1/4" Tubing

Ethernet Cable (Up to 75 Feet Long)

STE-8x01 Room Temp Sensor

and Configuration Tool

SimplyVAV

24 VAC

(Alternate STE-601x Room

Temperature Sensor)

VAV B ox

STE-140x Temp

Sensor

Supply Air

to Room

SimplyVAV

24 VAC

(Alternate STE-601x Room

Temperature Sensor)

Zone 16—MAC 19, Device Instance 1000016

Illustration 2—Sample Networked RTU Installation

BAC-120063CW-ZEC FlexStat 2 Installation and Conﬁguration Guide, Rev. G

Page 3

Roof Top Unit (RTU)

(1 or 2 Heat and 1 or 2 Cool)

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

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.

STE-140x Duct Sensor, Type III

Optional Outside Air Damper

AO9 or Relay 6

GND or SC

Optional Heating/Cooling Coil Valve

AO8

GND

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

GND

AO7

IN9

TERMINALS

IF BOTH RC AND RH TERMINALS ARE PRESENT: WIRE RC TO SC 1-3 AND RH TO SC 4-6.

IF ONLY ONE “R” TERMINAL IS PRESENT: WIRE BOTH SC 1-3 AND SC 4-6 TO R.

NOTE: Althoughtypicalterminalcodeleersare

shown, check the schematics of your unit for wiring details!

APPLICATION DEGREES SCALE: °F

APP:

ROOF TOP OPT: 1H/1C ADDITIONAL SETUP ZONE

Input

Terminals

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 congured for IN2 in the ADVANCED > APPLICATION > ADDITIONAL SETUP > SENSORS menu.

Output

Terminals

Typical

Terminal

Codes

RTU Input Connections

RTU Output Connections

(1 or 2 H and 1 or 2 C)

BACnet Objects

Analog 9 O. A. Damper (Optional) AO9

Ground

Optional Network

From Previous Network Device

To Next Network Device

RTU Terminals

GND

Analog 8 Heat or Cool Valve (Optional) AO8

Analog 7 Static Pressure Setpoint (Optional) AO7

Relay 6 O. A. Damper (Optional) BO6

SC 4–6 RH/R 24 VAC (for Relay terminals 4–6)

Relay 5 W2 Heat 2 (Optional) BO5

Relay 4 W1 Heat 1 BO4

Relay 3 Y2 Cool 2 (Optional) BO3

SC 1–3 RC/R 24 VAC (for Relay terminals 1–3)

Relay 2 Y1 Cool 1 BO2

Relay 1 G Fan BO1

NOTE: Connections above are for rmware R2.0.0.4 and later. Earlier rmware 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 or Relay 6).

(for Analog Output terminals 7–9)

Illustration 3—RTU Application Connections

BAC-120063CW-ZEC FlexStat 3 Installation and Conﬁguration Guide, Rev. G

Page 4

Heat Pump Unit (HPU)

1 or 2 Compressors with Auxiliary and Emergency Heat

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

STE-140x Duct Sensor, Type III

Optional Outside Air Damper

AO9

GND

Optional Heating/Cooling Coil Valve

AO8

GND

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

GND

AO7

IN9

TERMINALS

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.

HPU Terminals

From Previous Network Device

Optional Network

To Next Network Device

Illustration 4—HPU Application Connections

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.

NOTE: Althoughtypicalterminalcodeleersare

shown, check the schematics of your unit for wiring details!

APPLICATION DEGREES SCALE: °F

APP:

HEAT PUMP OPT: 1 STAGE ADDITIONAL SETUP ZONE

Input

Terminals

HPU Input Connections

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 congured for IN2 in the ADVANCED > APPLICATION > ADDITIONAL SETUP > SENSORS menu.

Output

Terminals

Typical

Terminal

Codes

HPU Output Connections

Analog 9 O. A. Damper (Optional) AO9

GND

(for Analog Output terminals 7–9)

Ground

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)

Relay 1 G Fan BO1

NOTE: Connections above are for rmware R2.0.0.4 and later. Earlier rmware 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).

BACnet Objects

BO2

BAC-120063CW-ZEC FlexStat 4 Installation and Conﬁguration Guide, Rev. G

Page 5

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 adequate diameter for all necessary wiring. Using 1-inch conduit and junction boxes is recommended! 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 transient 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

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.

CAUTION

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

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.

NOTE: IN1 and IN5–6 are

reserved for internal sensors

Inputs

(Wiring is dependent on application)

MS/TP Network

Inputs

24 VAC

Common/–/C

Phase/ /R

Illustration 5—Terminals and Connections

IN9

IN8

GND

IN7

–A

IN4

IN3

GND

IN2

NOTE: SC = Switched

(relay) Common

Outputs

Analog 9

GND 7–9

Analog 8

Analog 7

Relay 6

SC 4–6

Relay 5

Relay 4

Relay 3

SC 1–3

(Wiring Cutout in Backplate)

Relay 2

Relay 1

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 rmware 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 rmware

had it on AO9 instead.) The static pressure feedback 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.

BAC-120063CW-ZEC FlexStat 5 Installation and Conﬁguration Guide, Rev. G

Page 6

One Switched Common Connection Per Bank of Three Normally Open Relays

Relay 3 (or 6)

SC (Phase) 1–3 (or 4–6)

Relay 2 (or 5)

Relay 1 (or 4)

NOTE: Type II or III 10K ohm thermistors can be

selected by changing the menu seing in

ADVANCED > INPUTS (see Conguration

and Operation on page 7).

NOTE: FlexStat inputs do not support 1K ohm

RTDs.

Illustration 6—Switched (Relay) Common and Relays

For the bank of three relays, there is one Switched (relay) Common connection (in place of the GND terminal 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aachadevicethatdrawscurrentexceeding

the FlexStat’s output capacity:

• Maximum output current for individual ANALOG outputs (7–9) is 20 mA @ 12 VDC (each).

• Max. output current is 1 A for individual RELAYS @ 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conguredinthemenufor

DAT. See Conguration 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.

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 transformer is powered.

KMC Controls recommends powering only one controller/thermostat from each transformer. If installing a FlexStat in a system with other controllers/thermostats 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 Illustrations 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).

BAC-120063CW-ZEC FlexStat 6 Installation and Conﬁguration Guide, Rev. G

Page 7

Network EOL (End-Of-Line) Termination

The controllers/thermostats on the physical ends of an EIA-485 wiring segment must have end-of-line termination installed for proper network operation. (See Illustrations 7 and 8.) If a FlexStat is at the physical end of the MS/TP network line, set both the EOL termination switches to On (to the right) on the back of the circuit board. If not on the end, ensure that

both switches are O (to the left).

Conﬁguration and Operation

WED 7/30 5:33 PM

DAT

Zone Information (# of

Zones, # of Zones Calling

for Cooling, and # of Zones

Calling for Heating)

COOL:

OCC:

FAN:

COOL CALLS 5

Illustration 7—MS/TP Network End-Of-Line Termination

Input Pull-Up Switches

10K Ω

0-12 V

IN9

EOL Switches

OFF

IN8

Switch

Pushed

Left

Switch

Pushed

Right

IN7

IN4

IN3

IN2

NOTE: EOL = End Of Line of BACnet MS/TP network.

NOTE: 10K Ω inputs are configurable for Type II or Type III thermistors in FlexStat’s menu.

Illustration 8—EOL/Pull-Up Switch Positions

Left

(Override)

Down

Right

(Menu)

Illustration 9—FlexStat Display and Button Functions

NOTE: For additional information, see the relevant

partsoftheCongurationsectioninthe

FlexStat Operation Guide (but not all

things apply to this model).

NOTE: Seings and adjustments may require a

password.

Conﬁgure the Application and Address

Toaccessthemenus,presstherightbuon.Navigate themenusandchangeseingsbypressingacombinationofbuons. Press the:

• Enter buon to select and/or exit value editing.

• Up/Down buon to move among entries (up/

down lines).

• Left/Right buon to move among valueelds

(left/right spaces).

• Left buon to return to the Home screen.

Congure the application through the menu system. From the Main Menu, select ADVANCED (enter password if needed) and then APPLICATION.

APPLICATION DEGREES SCALE: °F

APP:

ROOF TOP OPT: 2H/2C ADDITIONAL SETUP ZONE DEV INS RANGE

BAC-120063CW-ZEC FlexStat 7 Installation and Conﬁguration Guide, Rev. G

ADDITIONAL SETUP

DAMPER

FAN SENSORS ZONE HYSTERESIS: 2 VALVE HT OR CL: HEAT DEVICE TYPE: 0-10V STAGING

Page 8

NOTE: The BAC-120063CW-ZEC FlexStat comes

preconguredfora2H/2CRTUandzone

device number range of 1000000 through

1000016.

Select:

1. APP: ROOF TOP or HEAT PUMP.

2. OPT: Match stages of heating and cooling to the

RTU or HPU.

3. Under ADDITIONAL SETUP > SENSORS, change IN2 from NONE to DAT.

SENSORS

IN2:

DAT

NOTE: The default Type III (10K ohm) thermistor

seing for DAT can be changed to Type II (if needed) in ADVANCED > INPUTS > 2:

DISCH AIR TEMP > SENSOR: >.

INPUT #2 DISCH AIR TEMP VALUE: 55.0°F CAL. OFFSET: 0.0 OUT-OF-SERVICE: FALSE FILTER WEIGHT: 6 SENSOR: >

10K TYPE III

4. Under ADDITIONAL SETUP, change other defaults if needed.

5. Under ZONE DEV INS RANGE, the default base zone device numbers (with up to 16 zones of SimplyVAV controllers) start at 1000001 as a default. To change the default base numbers to 2000001, 3000001, or 4000001, select the desired range.

ZONE DEVICE INSTANCE

RANGE:

1M = 1000001–1000016 2M = 2000001–2000016 3M = 3000001–3000016 4M = 4000001–4000016

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 conrm) INSTANCE to 1000000.

DEVICE

INSTANCE:

NAME: ZEC_FlexStat_1 LOCATION: KMC Controls

1000000

To congure the MAC address, from the Main Menu, select ADVANCED (enter password if needed) and then COMMUNICATIONS.

COMMUNICATIONS

ACTIVE:

STATUS: ACTIVE ETHERNET SETTINGS IP SETTINGS FOREIGN DEV SETTINGS MS/TP SETTINGS

CONFIGURE

COMMUNICATIONS

ACTIVE:

STATUS: ACTIVE MAC ADDRESS: 20 BAUD: 38400 AUTO-BAUD: OFF MAX MASTER: 20

MS/TP

To set protocol and parameters for BACnet communications:

1. Select ACTIVE: CONFIGURE.

2. Select MS/TP SETTINGS.

3. Change MAC ADDRESS to 20 (if needed).

4. Change MAX MASTER to 20 (or other relevant number depending on network).*

5. Select ACTIVE: MS/TP and restart the FlexStat.

*NOTE: For a network of 16 SimplyVAV controllers,

seing the Max Master to 20 will make the network more ecient and perform

faster. For network connections to larger networks with other equipment, the MAC address should be the same as the largest MAC address in the network for maximum performance.

NOTE: If the Zone Device Instance range is

changed from the default, change the FlexStat’s Device Instance to correspond with the range (e.g., 3000000 for a range of

NOTE: ACTIVE: CONFIGURE must FIRST BE

SELECTED before any of the values can be changed! Otherwise values are read only.

Setpoints

3000001—3000016).

If the controllers are going to be networked, congure the system address as needed and make note of the FlexStat MAC and Device Instance. If the system is stand-alone, address the FlexStat for MAC 20,

The home screen displays the DAT in large numbers (instead of room temperature that FlexStats normally display). To change the heating and cooling DAT setpoints, under the Main Menu, select SETPOINTS.

Device Instance 1000000. (See Illustration 2.)

BAC-120063CW-ZEC FlexStat 8 Installation and Conﬁguration Guide, Rev. G

Page 9

SETPOINTS

COOL DAT SETPOINT:

HEAT DAT SETPOINT: 130° F DUCT ST STPT: 0.5 in H2O

55° F

that one day in the Individual Days menu may be easier (two entries) than entering schedules for each day separately in the

Individual Days menu (ve entries).

The optional duct static pressure setpoint is also in this menu.

NOTE: The airow minimum limit in each

SimplyVAV controller needs to be at least

10 cfm (and 25 cfm is recommended). Otherwise, the controller will not properly sense the local duct DAT during minimum ow. See BAC-8000 series for more information about the controller-actuators.

Heat/Cool, Fan, Occupancy, and Override

When the fan is commanded to run, the animated “FAN” icon on the display rotates. When the fan

command stops, the fan icon is motionless.

The “OCC” icon shows a sun when in Occupied mode and a quarter moon when in Unoccupied mode.

HEAT or COOL will show (and be animated when there is an active command to move the temperature toward the setpoint via mechanical heating/cooling or an economizer), depending on the current mode. This can also be turned OFF.

To override these modes from the Home (temperature display) screen, press the Left arrow buon. Press Up or Down to get to the desired line and then Enter (twice) to edit the mode seing. Press Left to exit to Home.

Schedules

SCHEDULE

ENTIRE WEEK [MON–SUN]

WEEKDAYS [MON–FRI] WEEKEND [SAT–SUN] INDIVIDUAL DAYS HOLIDAYS

ENTIRE WEEK

7:30:00 AM ON

2: 5:15:00 PM OFF 3: 4: 5: 6: [—>] DELETES ENTRY

NOTE: The last overlapping entry overrides

any other. For example, suppose the WEEKDAYS menu is used to set all weekdays for 7:00 AM ON and 5:00 PM OFF, and then the INDIVIDUAL DAYS menu is used to add some additional evening meeting ON times for Tuesday and Wednesday. If the WEEKDAYS menu is later used to change the ON time from 7:00 to 7:15, schedules for all the individual week days will be reset to conform to what appears in the WEEKDAYS menu and any special times for individual days will be erased. (Special day schedules will then need to be added again through the INDIVIDUAL DAYS menu).

The Holiday entries will override the normal occupied weekly schedule entries and keep those days’

seings at their setback values. (Setback values are

entered in the Setpoints section of the Main Menu.)

HOLIDAYS

HOL1:

JAN 1 2017 HOL2: APR 14 2017 HOL3: MAY 29 2017 HOL4: JULY 4 2017 HOL5: SEPT 4 2017 HOL6: NOV 23 2017 HOL7: NOV 24 2017

NOTE: See the FlexStat Operation Guide for more

information on generic FlexStat operation.

Trends

The BAC-120063CW-ZEC Flexstat is precongured

for the following trend logs:

1. DAT (AI2 sampled at 30 second intervals).

2. DAT (at 1 minute intervals).

3. DAT (at 5 minute intervals).

4. Number of zones (AV22 at 1 minute intervals) of

SimplyVAVs.

The factory default schedule is always occupied (ON). To modify the schedule for mixed occupied (ON) and unoccupied (OFF) times, select Schedules in the Main Menu.

NOTE: If a day of a week (e.g., Friday) has a

dierent schedule than the rest, using the Weekdays menu rst and then modifying

BAC-120063CW-ZEC FlexStat 9 Installation and Conﬁguration Guide, Rev. G

5. Number of calls for cooling (AV24 at 1 minute

intervals) from SimplyVAVs.

6. 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

Page 10

intervals) to an optional CSP-4702.

The Trend Viewer is available in the Main Menu to view the (last 256 samples of) data in tabular format. Software, such as KMC Connect or TotalControl, can view the trend objects as graphs as well as change the interval as desired.

The dierent sampling rates allow a “longer” or “ner resolution” view of the trends. The default

sampling intervals can be changed by the user in

ADVANCED > DEVICE.

NOTE: The faster the sampling rate, the faster the

256 samples are lled and the values start

over.

NOTE: The FlexStat menu allows seing of

intervals only in multiples of 1 minute (not seconds). If you change a default “seconds” interval in the menu, you will not be able to set it back to the original without a factory reset or BAS software.

Zone Hysteresis (Changeover)

In the Additional Setup menu, the Zone Hysteresis value (AV102) is the number of controllers (above 50% of the total) required for “majority rule” in changing heating/cooling modes for the RTU or HPU. The default is 1. For an explanation of this

changeover seing option, see Sequence of Operation

on page 10.

NOTE: Firmware earlier than R2.0.0.4 did not have

this option.

Zone Status

In the lower right of the home screen, smaller leers

show, in rotation:

• The detected number of connected zones of SimplyVAVs.

• The number of zones calling for cooling.

• The number of zones calling for heating.

NOTE: After power-up or restarting of the FlexStat

and/or SimplyVAVs, the zone numbers require several minutes to show correct values.

For more detailed information, under the Main Menu, select ZONE STATUS to view the status of all connected zones. Options for each zone’s values are:

• Call for Cooling

• Call for Heating

• No Call for Either

• No Communication with a Zone (either there is a communication problem with a zone or no zone is connected)

The Zone Status screen also shows the Duct Status pressure.

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 the number of heating and cooling calls is equal, the previous mode is maintained.

The number of controllers above 50% of the total re- quired for changeover to the other mode is controlled by Zone Hysteresis (in the Additional Setup menu). For the default seing of 1, a majority by one control- ler will cause the mode to switch. For example, 8 controllers calling for heating versus 7 controllers calling for cooling will change the RTU/HPU mode from cooling to heating.

NOTE: If Zone Hysteresis is changed to 2, then

heating/cooling mode maintains the previous mode until there are two more zones needing the opposite mode than those needing the current mode. Increasing the number can be helpful if the system seems to be switching modes back and forth too quickly. The maximum hysteresis value is 16.

NOTE: See Zone Hysteresis (Changeover) on page

10 and Congure the Application and Address on page 7.

In RTU/HPU heating mode, the heating setpoint and the cooling setpoint are both set to 110°. In RTU/ HPU cooling mode, the heating setpoint and the cooling setpoint are both set to 55°. If there is no call

for heating or cooling (all VAV boxes are satised),

the cooling setpoint is set to 110° and the heating setpoint is set to 55°.

During a scheduled O time, the RTU/HPU fan does

not run unless there is a call for heating or cooling.

BAC-120063CW-ZEC FlexStat 10 Installation and Conﬁguration Guide, Rev. G

Page 11

Troubleshooting

Customization

• For optimal temperature control, all spaces within a particular zone should be exposed to similar environmental factors (e.g., all border a perimeter wall or all be within insulated interior spaces). Otherwise, for example, depending on the weather, perimeter spaces may consistently need heating when interior spaces consistently need cooling.

• The DAT sensor must be properly connected and congured. See Input Connections on page 6 and Congure the Application and Address on

page 7.

• The Device Instance of the FlexStat should correspond with the Device Instance range of the SimplyVAVs. See Congure the Application and

Address on page 7.

• Check the wiring. See Wiring Considerations on

page 5, Output Connections on page 5, Input Connections on page 6, Power Connec- tion on page 6, and Network Wiring on page

Additional customization can be done using KMC Connect, KMC Converge, or TotalControl. For example, a fan status switch (such as a KMC CSE-110x or a CSE-120x) could be connected to IN3 (with the

appropriate pull-up switch seing) and the following

code could be run in Program 9 or 10.

REM FAN STATUS

REM A Normally Open dry contact switch is connected to AI3 (with pull-up switch set to 10K ohms)

REM BV16 shows Active when switch is closed (fan running) and Inactive when switch is open (not running)

IF AI3 < 0.5 THEN BV16 = 1 ELSE BV16

= 0

NOTE: Set the program to Run on Cold Start, save

it, and restart the FlexStat.

The value of BV16 (active or inactive) could then be displayed on a card in the KMC Commander interface or a TotalControl graphics page.

• Check EOL switches. See Network EOL (End-Of-

Line) Termination on page 7.

• See also Zone Status on page 10.

• See also Setpoints on page 8.

• See also Schedules on page 9.

• See also Zone Hysteresis (Changeover) 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 boom. Clean the display with a soft, damp

cloth and mild soap.

Remote (BAC-5051E) Interface

The BAC-5051E BACnet router provides a means of

remotely monitoring and changing the conguration

of the zoning system with a web browser. For more information, see the BAC-5051E Router Application

and Installation Guide.

BAC-120063CW-ZEC FlexStat 11 Installation and Conﬁguration Guide, Rev. G

Page 12

IoT (KMC Commander) Interface

Additional Resources

KMC Commander provides an easy setup and interface of zoning (via web page or phone app) with remote monitoring and control, scheduling, trends, alarms, and integration with other IoT (Internet of Things) devices. For information, see VAV and IoT

RetrotsforVVTApplicationGuide.

See additional information about this model FlexStat

on the BAC-120063CW-ZEC web page.

For general operation, conguration, troubleshooting, 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

dierential pressure controller/actuator.

For remotely monitoring and changing the

conguration, see the BAC-5051E Router

Application and Installation Guide.

For IoT use with KMC Commander, see VAV and

IoTRetrotsforVVTApplicationGuide.

Important Notices

The material in this document is for information purposes only. The contents and the product it describes are subject to change without notice. KMC Controls, Inc. makes no representations or warranties with respect to this document. In no event shall KMC Controls, Inc. be liable for any damages, direct or incidental, arising out of or related to the use of this document.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. A BAC-12xxxx Class B digital apparatus complies with Canadian ICES-003.

KMC Controls, Inc.

19476 Industrial Drive

New Paris, IN 46553

574.831.5250

www.kmccontrols.com

info@kmccontrols.com

BAC-120063CW-ZEC FlexStat 12 Installation and Conﬁguration Guide, Rev. G