Keystone BFC Series Manual

BACnet Flow Controller for
Fan Filter Units
BFC Series
v001 – Issue Date: 08/30/22
© 2022 Keystone Clean Air Solutions. All rights reserved.
INSTALLATION + SERVICE MANUAL

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BACnet Flow Controller for Fan Filter Units | Table of Contents
Product Overview
General Information ............................................................1
Installation & Mounting Instructions
Typical Wiring.......................................................................2
Input/Output Description ...................................................2
Display Navigation
Initial Startup ........................................................................3
Main Menu ............................................................................4
Service Menu........................................................................5
Service Menu – Fan ............................................................6
Service Menu – Filter..........................................................7
Service Menu – I/O .............................................................8
Service Menu – BACnet .....................................................9
Service Menu – Diagnostics .............................................9
Filter Calibration
Filter Calibration using BFC Interface............................10
Filter Calibration over BACnet.........................................11
Networking & Setup
BACnet Wiring ....................................................................12
Termination ........................................................................12
Electrical Noise ..................................................................12
Network Wire Specications ...........................................13
BACnet Service Menu .......................................................14
BACnet Networking and Setup .......................................15
Setting the Device Instance (Coupled MAC and DI) ...16
Setting the Device Instance (De-coupled MAC and
DI) .........................................................................................17
Network Layout..................................................................18
Package/Component Identication...............................20
Location...............................................................................21
Mounting .............................................................................22
BAS Input Signal ................................................................23
Analog RPM Feedback .....................................................24
Wiring and Cables..............................................................25
Maintenance
Troubleshooting.................................................................26
Specications.....................................................................27
BACnet points list for BFC rmware v3.1.0..................28

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BACnet Flow Controller for Fan Filter Units | Product Overview
General Information
The BACnet Flow Controller (BFC) is a DDC fan controller designed specically for controlling ow through Krown Fan Filter
Units with EC motor technology. The BFC controls an EC motor through a local setpoint which is adjustable using a push
button interface on the BFC, by an analog BAS input voltage, or over BACnet.
In addition to fan control, the BFC can monitor lter pressure drop, lter loading, signal for lter changes, monitor the motor
and lter lifetime in hours, as well as report airow and air temperature over the lter. This information can be viewed from
the LCD screen on the front of the BFC controller, or over BACnet on a building management system.
Back of BFC Controller
Front of BFC Controller
1
34
1
2
3
4
Service Port RJ12 Jack
BACnet Connection RJ45
Jacks
Up and Down arrow buttons
for navigation
Menu button for info
menu and entering Service
menus
22
7
8
4
3
11
5
6
9
10
1
2
Service Port RJ12 Jack
BACnet Connection RJ45
Jacks
24 VAC Power Connection
Pressure Transducer
0-10 VDC Analog Outputs
24 VAC Binary Outputs
Contact Closure
Analog Inputs
Thermistor Input
Motor #1 Jack
BACnet MS/TP Terminals
55
6
12
23
4
10
11
789

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BACnet Flow Controller for Fan Filter Units | Installation Instructions
Typical Wiring
Input/Output Description
Analog Outputs
AO1
Congurable for Unit Pressure, CFM (Air Flow), RPM (Mo-
tor Speed), Filter Load , BAS, *LED Dimming, *LED On/
Off (*for Krown-L w/ BACnet Dimming Control)
AO2
Congurable for Unit Pressure, CFM (Air Flow), RPM (Mo-
tor Speed), Filter Load , BAS, *LED Dimming, *LED On/
Off (*for Krown-L w/ BACnet Dimming Control)
AO3
Congurable for Unit Pressure, CFM (Air Flow), RPM (Mo-
tor Speed), Filter Load , BAS, *LED Dimming, *LED On/
Off (*for Krown-L w/ BACnet Dimming Control)
24 VAC Binary Outputs
BO1 Red LED out
BO3 Green LED out
COM COMMON
Analog Inputs
AI1 Input voltage for remote fan speed control
AI2 Input voltage for LED control (*for Krown-L w/ BACnet Dimming Control)
Inputs
Thermistor Input Analog input for monitoring air over lter
temperature, 10k type J thermistor
Contact Closure Binary input to activate secondary ECM setpoint.

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BACnet Flow Controller for Fan Filter Units | Display Navigation
Initial Startup
When the BFC controller is powered up with 24VAC it will display the following information.
KEYSTONE
ELECTRONICS Start–up screen
BFC
VERSION Displays rmware version
CURR
PRESSURE Displays the current static pressure in in. w.g.
ECM SETPOINT Displays ECM setpoint in % motor speed
UNIT STATUS Displays current unit status (Off, Low Pressure, Normal, Filter Loaded)
CONTROL MODE Displays the current control mode (BACnet, BAS, Local Control)
CURRENT CFM Displays the current airow (only visible with the Constant Flow motor program)
*LCD display will cycle between Curr Pressure, ECM Setpoint, Unit Status, Control Mode, and Current CFM during normal
operation.
Change ECM motor setpoint using and arrow keys
LOCAL ECM
58% Setpoint will save after being adjusted with arrow keys
NOTE: Local setpoints are stored to EEPROM and will remain set after power failures.

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BACnet Flow Controller for Fan Filter Units | Display Navigation
Main Menu
From the Home Screen press the Menu button to enter this menu. Use Up and Down arrow buttons to navigate through.
FILTER LOAD Read Only - Displays % of lter loading based on new, clean lter pressure drop
ECM SPEED Read Only - Displays the current RPM of the motor
LOCAL ECM Displays local ECM Setpoint.
Press the Menu button then use the arrow keys to change the ECM Setpoint. Press menu again to save.
LOCAL DIMMING Displays local LED Dimming Setpoint (for Krown-L w/ BACnet Dimming Control).
Press the Menu button then use the arrow keys to change the Dimming Setpoint. Press Menu again to save.
MAC ADDRESS Read Only - Displays device MAC Address
DEVICE INST Read Only - Displays device Instance
PRESS MENU
TO EXIT
NOTE: Local setpoints are stored to EEPROM and will remain set after power failures.

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BACnet Flow Controller for Fan Filter Units | Display Navigation
Service Menu
Hold down Menu button for 5 seconds, display will show ‘Passcode’. Use Up and Down arrow buttons to enter this sequence:
Down, Up, Up, Down.
SERVICE MENU
FAN
Allows you to see or adjust:
Current CFM
CFM Offset
CFM Tweak
ECM Setback
Fan Type
Unit Size ie. 2X2
Wheel Type
Voltage Type
Motor Runtime (in hours)
Reset Motor Runtime
SERVICE MENU
FILTER
Filter Load
Load Trip
Current Pressure
Filter Type
Filter Runtime (in hours)
Reset Filter
SERVICE MENU
I/O
Analog In 1 (BAS ECM SP)
Analog In 2 (BAS LED SP)
Analog Out 1 (Present Value)
Analog Out 1 (AO1 Usage)
Analog Out 2 (Present Value)
Analog Out 2 (AO2 Usage)
Analog Out 3 (Present Value)
Analog Out 3 (AO3 Usage)
SERVICE MENU
BACNET
MAC Address
Device Instance
Baud Rate
RS-485 Termination
BACnet Reset
SERVICE MENU
DIAGNOSTICS
Restore Defaults
Total Device Reset
Factory Conguration Reset

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BACnet Flow Controller for Fan Filter Units | Display Navigation
Service Menu – Fan
Press Menu button to enter this menu. Use Up and Down arrow buttons to navigate through.
CURRENT CFM
XXXX CFM Read Only
UNIT STYLE Supply, Exhaust
NOTE: Must match actual conguration of Krown Fan Filter Unit
UNIT SIZE
2X2
Displays the ECM motor calibration for Krown Fan Filter Unit nominal size (2x2)
Selectable sizes are: 2’ x 2’, 2’ x 3’, 2’ x 4’
NOTE: Must match actual conguration of Krown Fan Filter Unit.
WHEEL TYPE
XXX
Adjust unit wheel type from FC to BC. Read only varying on fan type and unit size
The wheel type is factory set, but it can be adjusted only under the Constant Torque setting. From there, you
can set the wheel type to BC on 2’ x 3’ and 2’ x 4’ units only.
NOTE: BC wheel type is for Constant Torque only.
VOLTAGE TYPE
XXX Adjust unit voltage type from 115/240/277.
MOTOR PROGRAM
XXX
Adjust fan type from Constant Volume to Constant Torque. Airow (CFM) will be hidden if fan type is constant
torque
MOTOR RUNTIME
0 HRS Read Only – Displays number of hours on motor since last reset
RESET MOTOR
RUNTIME Resets Motor Runtime
CFM OFFSET
0 CFM
Adjust airow reading +/- up to 500 CFM to coincide with balancer measured airow
Example: ow hood reads 550 CFM
Airow reading on BFC is 500 cfm
Adjust CFM offset to +50 CFM
CFM TWEAK
100 %
Adjust airow reading between 50 to 200%
Example: ow hood reads 550 CFM
Airow reading on BFC is 500 cfm
Adjust CFM tweak to +110%
ECM SETBACK Secondary setpoint for use in turndown or night setback applications. This is activated upon contact closure.
PRESS MENU
TO EXIT

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BACnet Flow Controller for Fan Filter Units | Display Navigation
Service Menu – Filter
Press Menu button to enter this menu. Use Up and Down arrow buttons to navigate through.
FILTER TYPE
XXX
Adjust lter type, BTR, RSR.
BTR = Bench Top Removable RSR = Room Side Removable
FILTER LOAD
XX % Read Only - Displays % of lter loading based on new, clean lter pressure drop
LOAD TRIP
1.50
This read only value represents the ratio between clean and loaded lter pressure. It is factory set for 1.5
times the clean lter pressure and is not eld adjustable.
Example: If the lter calibrated pressure is 0.16 in. w.g., the loaded lter pressure will be 0.24 in. w.g.
FILTER RUNTIME
0 HRS Read Only – Displays number of hours on lter since last reset
RESET
FILTER
Resets Filter Runtime.
Activate this to calibrate lter pressure during initial setup or lter replacement.
PRESS MENU
TO EXIT

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BACnet Flow Controller for Fan Filter Units | Display Navigation
Service Menu – I/O
Press Menu button to enter this menu. Use Up and Down arrow buttons to navigate through.
BAS (AI1)
0 VDC Read Only – Displays current input BAS voltage for motor speed control
AI2 (BAS LED)
0 VDC Read Only – Displays input voltage to Analog Input 2 for LED control (UFFU w/ BACnet Dimming Control only)
CONTACT CLOSURE Displays current state of binary contacts used for night setback / secondary ECM setpoint (open / closed)
AO1 USAGE
FILTER LOAD
(DEFAULT)
Congure Analog Output 1 for:
Unit Press - Unit Pressure; Range (0 in. w.g. to 2 in.w.g.)
CFM - Airow; Range (0 - 5000 CFM)
RPM - Range (0 - 2500 RPM). See page 11 for RPM details.
Filter Load - Range (0 - 100%)
BAS - 0-10VDC signal to BAS
LED Dimming (0 - 100%)
LED On/Off (Changes autonomously Based on LED Dimming value)
Disabled
AO1 PRESVAL
0 VDC Read Only - Present Value for Analog Output 1
AO2 USAGE
UNIT PRESSURE
(DEFAULT) Congure Analog Output 2 same as AO1 options shown above.
AO2 PRESVAL
0 VDC Read Only - Present Value for Analog Output 2
AO3 USAGE
BAS (DEFAULT) Congure Analog Output 3, same as AO1 options shown above.
AO3 PRESVAL
0 VDC Read Only - Present Value for Analog Output 3
PRESS MENU
TO EXIT