Failure to follow all instructions may result in equipment damage or a hazardous condition. Read all instructions
carefully before installing equipment.
Local codes and practices
Always install equipment in accordance with the National Electric Code and in a manner acceptable to the local
authority having jurisdiction.
Electrostatic sensitivity
This product and its components may be susceptible to electrostatic discharge (ESD). Use appropriate ESD
grounding techniques while handling the product. When possible, always handle the product by its non-electrical
components.
High voltage safety test
Experienced electricians, at first contact, always assume that hazardous voltages may exist in any wiring
system. A safety check using a known, reliable voltage measurement or detection device should be made
immediately before starting work and when work resumes.
Lightning and high-voltage danger
Most electrical injuries involving low-voltage wiring result from sudden, unexpected high voltages on normally
low-voltage wiring. Low-voltage wiring can carry hazardous high voltages under unsafe conditions. Never install
or connect wiring or equipment during electrical storms. Improperly protected wiring can carry a fatal lightning
surge for many miles. All outdoor wiring must be equipped with properly grounded and listed signal circuit
protectors, which must be installed in compliance with local, applicable codes. Never install wiring or equipment
while standing in water.
Wiring and equipment separations
All wiring and controllers must be installed to minimize the possibility of accidental contact with other potentially
hazardous and disruptive power and lighting wiring. Never place 24VAC or communications wiring near other
bare power wires, lightning rods, antennas, transformers, or steam or hot water pipes. Never place wire in any
conduit, box, channel, duct or other enclosure containing power or lighting circuits of any type. Always provide
adequate separation of communications wiring and other electrical wiring according to code. Keep wiring and
controllers at least six feet from large inductive loads (power distribution panels, lighting ballasts, motors, etc.).
Failure to follow these guidelines can introduce electrical interference and cause the system to operate
erratically.
Warning
This equipment has been tested and found to comply with the limits for a class A digital device, pursuant to part
15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause
harmful interference, in which case the user will be required to correct the interference at his own expense.
By using this Honeywell literature, you agree that Honeywell will have no liability for any damages arising out of
your use, or modification to, the literature. You will defend and indemnify Honeywell, its affiliates and
subsidiaries, from and against any liability, cost, or damages, including attorneys’ fees, arising out of, or resulting
from, any modification to the literature by you.
Questions, corrections, or comments?
To improve our information products and better serve our readers, your feedback is vital. If you have any
questions, corrections, or comments about this publication or any other information products, please send e-mail
to WEBsSquad@honeywell.com.
About the BACnet FF 4
About this document and related publications 5
BACnet FF dimensions 6
Mounting guidelines 7
Installing the wallplate 7
Wiring the wallplate 8
Mounting the BACnet FF faceplate 9
Mounting a door/window sensor 9
Mounting a PIR occupancy motion sensor 11
Terminals and wiring 12
Power supply guidelines and requirements 14
BACnet FF power ratings 14
Selecting a transformer 14
Power supply grounding and wiring 14
Backup power 15
MS/TP LAN Wiring 16
Terminating MS/TP LAN cabling 16
Grounding the MS/TP LAN shield 17
Terminating resistors 17
Configuration 18
Adjusting the date and time 18
Setting the MAC address and device instance 18
Installer setup (ISU) codes 20
Pairing a sensor to a wireless BACnet FF 22
Fixed field service codes 24
Operational overview 25
Configuring a DDCMULTI application 27
Application Sequences and Configuration Settings28
[AP] 0: Air-to-air heat pump29
[AP] 1: Water-source heat pump 29
[AP] 2: Air-to-air heat pump46
[AP] 3: Water source heat pump 46
[AP] 4: Air Conditioning Unit 63
[AP] 5: Air Conditioning Unit 79
[AP] 6: 4 Pipe Fan Coil Unit 96
[AP] 7: 4 Pipe Fan Coil Unit 112
[AP] 8: 4 Pipe Fan Coil Unit 128
[AP] 9: 4 Pipe Fan Coil Unit 146
[AP] 10: Air to Air Heat Pump164
[AP] 11: 2 Pipe Fan Coil Unit 183
[AP] 12: 2 Pipe Fan Coil Unit 201
[AP] 13: 2 Pipe Fan Coil Unit with Change Over Control 219
[AP] 14: 2 Pipe Fan Coil Unit with Change Over Control 237
[AP] 15: 2 Pipe Fan Coil Unit255
[AP] 16: 2 Pipe Fan Coil Unit with Change Over Control 272
[AP] 17: 4 Pipe Fan Coil Unit290
[AP] 18: 2 Pipe Fan Coil Unit with Change Over Control 309
Appendix A: BACnet object and property reference 327
Appendix B: Ordered list of control points 343
Appendix C: Quick reference 347
Appendix D: Canadian conformance statements 348
The Honeywell BACnet FF (models TB3026B and TB3026B-W) is a
communicating sensor/fixed application controller with built-in humidity sensor.
The TB3026B-W is the wireless version with an onboard wireless receiver for
wireless occupancy control.
Electrical inputs and outputs wire directly to field equipment. The BACnet FF
comes pre-loaded with nineteen applications that support common uses. These
applications can be selected and some of the parameters adjusted at the
controller without the need for a BACnet front end.
Operational information and control data is available to other building
controllers and systems through the BACnet protocol (ANSI/ASHRAE
standard). This enables a BACnet FF to share data and execute commands
initiated from other BACnet-compliant devices.
This document provides information about installing and wiring a BACnet FF to
equipment, power, and communication channels. It also shows how to operate
the user interface.
IMPORTANT Always install equipment in accordance with the National
Electric Code and in a manner acceptable to the local authority having
jurisdiction (AHJ). No guidelines, instructions, installation practices, or other
information presented in this guide may be interpreted to supersede or modify
the local codes and practices of the AHJ.
Ta bl e 1Other documentation related to BACnet FFs
Document (ID)Contains
Installation Instructions (31-00093)Instructions on how to install, wire
and perform initial configuration for
the BACnet FF
Product Data
(31-00096)
WEBs-AX Configuration Wizard Guide
(31-00097)
Summary of capabilities and
specifications
Instructions on how to configure the
BACnet FF through the WEBs based
wizard
The BACnet FF consists of a mounting plate and a circuit board with a plastic
cover. See the BACnet FF Installation Instructions (31-00093) for more
information.
The BACnet FF is designed to be wall-mounted indoors, with dimensions ideal
for mounting to a single-gang electrical box.
Mount in a clean, dry location away from windows, air ducts, and other places
where environmental factors may affect temperature and humidity readings. If
you mount the BACnet FF on the interior of an outside wall, thoroughly insulate
so outside air behind the sensor does not affect the sensor reading.
To meet requirements of the Americans with Disabilities Act, mount no higher
than 48" from the floor and with a minimum clear floor space of 30" X 48" (760
X 1220 mm).
CAUTION Thoroughly read all instructions before mounting and wiring.
Always install equipment in accordance with applicable electric codes and the
instructions.
Installing the wallplate
The BACnet FF can be mounted horizontally on the wall or on a 4 in. x 2 in.
(101.6 mm x 50.8 mm) wiring box.
Installation and Operations Guide
Mounting guidelines
|
To install the wallplate
1. Position and level the wallplate (for appearance only).
2. Use a pencil to mark the mounting holes.
Figure 2 Wallplate dimensions
3. Remove the wallplate from the wall and, if drywall, drill two 3/16-in.
holes in the wall, as marked. For firmer material such as plaster, drill
To mount the BACnet FF faceplate, align the terminal blocks with the pins on
the back of the BACnet FF and push the faceplate straight onto the wallplate.
Installation and Operations Guide
Mounting guidelines
|
Figure 4 BACnet FF faceplate mounting
Mounting a door/window sensor
These instructions apply to the primary door sensor and an optional second
door/window sensor, WSK-24.
Note The BACnet FF supports a maximum of 8 door/window sensors.
To mount a door sensor
1. Remove the battery tab.
Note Completely remove the battery tab or the BACnet FF will not
operate.
2. Remove the plastic mounting bracket from the door sensor housing.
3. Place the mounting bracket for the door sensor high on the frame of the
door. Secure the bracket to the door frame using the two screws or
adhesive tape provided.
Note The BACnet FF supports a maximum of 3 passive infrared (PIR) sensors.
To mount a PIR motion sensor
1. T ake off the cover by removing the cover release screw on the bottom of
the PIR backplate.
Mounting guidelines
|
Figure 6 PIR occupancy motion sensor mounting options
2. Insert three AAA batteries.
3. Secure the PIR sensor to the wall using one of the following options:
•Wall Mount option 1: Use adhesive tape to secure the PIR backplate
to the wall.
•Wall mount option 2: Using either the top or bottom two holes of the
PIR backplate, insert the two long screws to secure the PIR
backplate to the wall.
•Ceiling mount option: Align the m ounting bracket and PIR
backplate. Insert the two small screws into the top holes of the
backplate and secure it to the bracket. Use the two long screws (and,
if necessary, the optional plastic anchors) to mount the bracket and
PIR backplate to the ceiling.
4. Replace the PIR sensor cover and cover release screw.
The BACnet FF label identifies wiring terminals by number and function.
T erminals are numbered from top to bottom, beginning with 1 on the upper right
side of the wallplate and continuing top-to-bottom on the right side of the
controller. I/O terminals carry an additional numeric identifier that corresponds
to the software I/O. Use this section to identify terminals on the BACnet FF. See
later sections for more specific instructions, cautions, and recommendations.
Power supply terminals
Use terminals 1 and 5 to connect the 24V AC power supply to the BACnet FF.
Ground terminals
These terminals are used for terminating the grounded leg of the 24VAC circuit
and the return grounds of BOs.
COM terminals
These terminals are used for terminating the return grounds of AIs and AOs.
Universal inputs (AIs)
Use these terminals (in conjunction with adjacent GND terminals) to connect
universal inputs. Input terminals accept a variety of signal types.
BACnet FF
|
Binary outputs (BOs)
Use these terminals to connect BO loads (ON/OFF control). Terminate the BO
return ground to the panel/enclosure ground or a GND terminal on the BACnet
FF.
WARNING! Do not apply line voltage to source pins.
Analog outputs (AOs)
Use these terminals to connect AO-loads (modulating control). The AO-return
ground must terminate to the nearest GND terminal.
MS/TP LAN terminals
Use terminals 11(MS/TP-) and 12 (MS/TP+) to connect the BACnet MS/TP
LAN to the BACnet FF. Maintain polarity throughout the entire LAN. See
“MS/TP LAN Wiring” on page 16 for more information.
The BACnet FF uses header-style termination blocks to simplify field wiring of
power, communications, and I/Os. Terminal blocks accept wire gage from
12–24AWG.
To terminate wire to a BACnet FF
1. Strip approximately 1/8” of the wire jacket from the end of the wire.
2. Use a small screwdriver (1/8” max) to turn the adjustment screw fully
counter-clockwise. The clamps in the wire slot separate as you turn the
screw.
3. Insert the stripped end of the wire into it (try to get the jacket flush with
the terminal block). If using stranded wire, be sure to insert all strands
into the wire slot. If terminating multiple wires, trim wires to same
length and tightly twist exposed wire together.
4. Hold the wire in place and turn the adjustment screw clockwise to
tighten it until the clamps in the wire slot secure the wire.
BACnet FF uses 24VAC power from a UL Listed Class 2 24VAC transformer
(not provided). The BACnet FF uses a half-wave rectifier to convert the AC
power supply to onboard power. This enables multiple BACnet FFs with
half-wave power supplies to be powered from a single, grounded transformer.
CAUTION Half-wave devices and full-wave devices must not use the same AC
transformer. If a BACnet FF will share its power supply with another device,
make sure that the other device utilizes a half-wave rectifier and that polarity of
wiring is maintained. Failure to do so can result in equipm en t dam a ge.
Figure 7 Internal BACnet FF power wiring schematic, half-wave rectifier
BACnet FF power ratings
The BACnet FF minimum current draw is 24 VAC @50ma leading to ~1.2VA.
The minimum applies when the BACnet FF supports no binary output (BO)
loads. If the BACnet FF supports AOs, the minimum VA rating includes the
draw of all AO-loads energized at maximum rating. The maximum power draw
is the minimum VA rating plus the power draw when all BOs are energized at
maximum capacity .
Selecting a transformer
The safest way to size a transformer is to ensure that the maximum VA load
rating of the BACnet FF is less than 85% of the Nameplate VA rating of the
transformer. Even if all outputs are not presently used, this ensures that each
BACnet FF has sufficient power for future equipment additions.
IMPORTANT Transformer sizing should never exceed the maximum UL Class
2 rating.
Power supply grounding and wiring
When connecting power to the BACnet FF, ensure that one leg of the VAC
secondary circuit connects to a known earth ground. Also ensure that the GND
terminal on the BACnet FF connects to the same known earth ground.
Supplying a high-quality ground connection to a BACnet FF and then properly
connecting the BACnet FF to the ground is one of the most important things you
can do to ensure a trouble-free installation.
14
The 24VAC secondary leads are not interchangeable. Once a lead connects to
the GND terminal on the BACnet FF, it is the grounded lead. Observe and
maintain polarity for subsequent connections. The GND terminal provides a
reference ground for the circuit board and communications wiring. Use 18 AWG
cable for best results.
WARNING Ensure that all BACnet FF power, communications, and I/O
cabling are grounded according to these instructions. Failure to follow these
instructions may result in BACnet FF operational and communication failures or
equipment damage.
Power supply wire selection
If you are considering long power supply wiring runs, using the right wire size is
critical. If the wire is too small, the resistance may be too high, resulting in a low
voltage supply to the BACnet FF. This is known as line loss. The wire size is
based on the length of the wire run and the current draw of the BACnet FF. Use
Figure 8 to determine wire size; obtain additional information from the
transformer manufacturer.
Power supply guidelines and requirements
|
Figure 8 BACnet FF wiring recommendations
Backup power
The BACnet FF features a built-in supercapacitor that will run the on-board
clock for ten days in the event of power loss.
The BACnet FF communicates on the site-wide BACnet system over a
twisted-pair MS/TP LAN, which uses the EIA–485 signaling standard. BACnet
FFs are master devices on the MS/TP LAN.
BACnet FF
|
Each BACnet FF employs a high-quality EIA–485 transceiver and exerts
load on the MS/TP LAN.
Ta bl e 2MS/TP LAN facts
Transmission speed9.6, 19.2, 38.4, 76.8Kbps (configured at global
controller).
LayoutBus.
CablingBACnet specifies the following. Shielded, twisted-pair
cabling with characteristic impedance between 100 and
130W. Distributed capacitance between conductors
must be less than 30 pF/foot (100 pF/m). Distributed
capacitance between conductor and shield must be less
than 60 pF/foot (200 pF/m). Foil or braided shield
acceptable.
Segment length4000 ft. (1071 m.) per segment using recommended
wire.
Maximum devices
overall
Depends on classification of devices as master or slave.
Maximum number of master devices is 128. Maximum
number of slave devices or devices overall (mixed
master and slave) is 255. This includes BACnet FFs,
BACnet global controllers (all are considered masters)
and any other devices, regardless of their relative unit
loads.
¼ unit
Maximum devices
per segment
RepeatersRequired when making runs longer than 4000 ft. Three
Terminating
resistors
Shield groundingGround shield drain wire at single point earth (panel)
Terminating MS/TP LAN cabling
MS/TP terminations are located on the lower left of the BACnet FF wallplate.
Maintain polarity of the MS/TP wire run throughout the MS/TP LAN.
Depends on relative unit load of devices (see
“Terminating MS/TP LAN cabling” on page 16).
repeaters maximum between any two devices.
Matched resistors required at each end of segment bus
wired across (+) and (–). Use matched precision
resistors rated ¼W ±1% / 80 - 130 Ohms.
ground, not BACnet FF ground. Tape off shield drain
wire at other end. Tie shield drain wire through at each
Proper shield grounding of the MS/TP cabling can help minimize the risk of
communications problems and damage to equipment because of transient
voltage spikes (for example, lightning strikes).
Follow these guidelines for grounding MS/TP cable shields:
• Each MS/TP segment should have a single point of shield ground,
preferably as close to the middle of the cabling run as possible.
• Do not ground the MS/TP shield using a BACnet FF terminal.
• Never ground both ends of a shield; differences in potential between the
grounds may induce current on the shield, causing interference.
• At termination conn ectin g points, tie the shield through with a wire nut.
• At ungrounded, exposed shield points (the end of a segment), tape back
the shield to the wire jacket or, for optimum transient shunting, use
100V gas discharge tubes or 120V MOVs between shield and ground.
Terminating resistors
Matched terminating resistors wired across MS/TP+ and MS/TP– are required at
the last device on each end of the MS/TP segment for signal integrity (Figure 9).
Installation and Operations Guide
MS/TP LAN Wiring
|
Optimum segment performance typically requires “tuning,” a process by which
the value of the terminating resistors is selected based on the wave form of
signals on the segment. View wave forms using an industrial scope meter. The
goal is to have as square a wave form as possible with an amplitude greater than
200 mV. Resistors affect the wave form as follows:
• When the resistance value decreases, the amplitude of the wave form
decreases and becomes more square.
• When the resistance value increases, the amplitude of the wave form
increases and becomes less square.
Typically, precision resistors in the range 80-130 Ohms (+
results. Ideally, the value of the terminating resistors should match the rated
characteristic impedance of the installed cable. For example, if the installed
MS/TP cable has a listed characteristic impedance of 100 Ohm, install 100 Ohm
matched precision resistors.
CAUTION Do not mismatch terminating r e sistors. Ensure that both resistors
on a segment have the same value.
Note Typically, White is Data - and Black is Data +.
Once the BACnet FF is mounted and wired, configure it from the BACnet FF
touchscreen.
Adjusting the date and time
When the controller is first powered up, you may need to set the date and time.
These are set at the factory, but the on-board power supply may have run down.
If this happens, adjust the date and time.
To adjust the time
1. Touch Clock at the bottom of the screen.
1. Use the arrows to adjust the year, month, and day.
2. Press DONE.
3. Adjust the time and press DONE.
T o manually adju st the date and ti me after initial setup, see “Clock operation” on
page 25.
Setting the MAC address and device instance
The factory default MAC address is 0. Valid MAC addresses are 0-127. The
default device instance is 0009999. Valid device instances are 0-4194302.
Note The device instance can also be set using a BACnet Supervisor
To set the MAC address and device instance at the display
1. From the home screen, press SYSTEM (left side of the screen).
Five blank touch keys will appear at the bottom of the screen.
2. Press and hold the two blank keys on either side of the center key for
approximately five seconds (see Figure 10).
T
Insi
DON
Figure 10 Entering ISU mode
t T
Followin
The installer setup (ISU) screen appears. An ISU code is displayed in
the lower left. It is a four-digit code beginning with zero. The current
setting is displayed in the lower right.
Figure 11 ISU screen
3. Use the down arrow next to the installer setup code to advance to ISU
code 800.
4. Use the up and down arrows next to the current setting to set ISU code
800 (MAC address) to a value between 0 and 127.
5. Set ISU code 801 (first digit of device instance) to a value between 0
and 4.
Note The device instance is set by entering values in four separate
6. Set ISU code 802 (second and third digits of device instance) to a value
7. Set ISU code 803 (fourth and fifth digits of device instance) to a value
8. Set ISU code 804 (sixth and seventh digits of device instance) to a value
9. Press Done to exit installer setup.
Installer setup (ISU) codes
Installer setup mode provides access to functions specific to installation of a
BACnet FF. Some BACnet FF configuration parameters can be altered from the
ISU screens. The ISU parameters can also be accessed via BACnet.
between 00 and 99.
between 00 and 99.
between 0 and 99.
For example, if you want to set the MAC address to 15 and the device
instance to 1876, you would use these settings:
You can require a PIN to access ISU mode by setting AV-133 to a non-zero,
four-digit number.
To access the ISU screens
1. From the home screen, press SYSTEM (left side of the screen).
2. Five blank touch keys appear on the bottom of the screen between the
Done and Cancel keys. Press and hold the two blank keys on either side
of the center key for approximately five seconds. See Figure 10.
3. If a PIN code is required, use the top arrows to select the first two digits
of the code and the bottom arrows to select the third and fourth digits of
the code, and then press DONE.
The ISU screen appears.
4. Use the arrows to select parameters and values. See Table 3 for details.
0 – no lock
1 – access temperature settings only
2 – fully locked
Installation and Operations Guide
Ta bl e 3 ISU parameters
BACnet FF
|
ISU
Parameter
Code
DescriptionAllowed Values
700Sensed room
temperature offset
(AV-138)
701Sensed room
humidity offset
(AV-139)
702Sensed outside air
temperature offset
(AV-140)
703Sensed outside
humidity offset
(AV-141)
800MS/TP MAC0-127
801BACnet Device
Instance - first digit
802BACnet Device
Instance second and
third digits
803BACnet Device
Instance forth and
fifth digits
-4 to +4 degrees F
-5% TO +5%
Humidity cannot be adjusted above
100% or below 0%.
-4 to +4 degrees F
-5% TO +5%
Humidity cannot be adjusted above
100% or below 0%.
0-4
00-99
00-99
804BACnet Device
Instance sixth and
seventh digits
Pairing a sensor to a wireless BACnet FF
The BACnet FF and wireless sensor kits (WSK-24) ship unpaired, verified by
two dashes in the Sensor Status field on the BACnet FF’s Wireless Sensor Setup
screen. To pair them, issue a pairing command from the BACnet FF and then
activate the sensor.
Accessed from Field Service Mode, the BACnet FF’s W i reless Sensor Setup
Mode includes diagnostic screens for configuration and checkout of associated
sensors. With :UC displayed in Field Service Mode, press the blank key (blank
area) just to the left of the blank center key, and then press the down arrow key
next to the :UC parameter.
Door/window sensors may be paired to any available sensor number in the range
1-8. When cycling through sensor numbers on the Wireless Sensor Setup screen,
unpaired sensor numbers show a status of --.
PIR sensors may be paired to any available sensor number in the range 1-3.
1. Make sure the battery is installed and activated in the sensor.
2. If the sensor is a door/window switch, align the magnet so that the
sensor is in the closed position. If the sensor is a PIR sensor, cover the
PIR.
IMPORTANT! Verify that the sliding door/window contact is closed
and cover all other PIRs to prevent interference during the pairing
process.
|
Configuration
3. On the BACnet FF select the sensor to pair and then press Reset.
The RESET key disappears and WAIT is displayed indicating that the
BACnet FF is waiting to pair the sensor with the next device that
receives a radio signal.
4. Activate the sensor you want to pair.
Note Pairing times out after 10 seconds of no pairing activity.
5. Verify that the BACnet FF and sensor successfully paired.
Paired = sensor status is displayed, replacing --.
Timed out = RESET is displayed and sensor status
is --.
Figure 13 Door sensor number 1 paired and in closed status.
To erase sensor-to-BACnet FF pairings
1. While viewing any sensor status screen while pairing is not taking
place, press the blank key to the left of CANCEL.
2. Press the blank key to the right of DONE.
The sensor status field displays --, indicating unpaired.
Field service mode enables technicians to query and command key operating
variables in the BACnet FF while at the BACnet FF touchscreen. A technician
presses a particular key sequence at the BACnet FF to enter field service mode.
In field service mode a technician uses the left arrows to scroll through data
codes and the right arrows to change the value associated with a code.
The lower left of the LCD shows the two-digit data code and the main area
displays the data value. A pre-defined list of data codes is available within the
description of each application. See Ta ble 8 as an example for applications 0 and
1. “Configuring a DDCMULTI application” on page 27 provides mo re
information about these settings.
Note When using the local user interface to change applications (AV-49), the
application defaults will NOT change and must be changed manually.
You can deny users access to field service mode by setting BV-68 to ON. You
can also require a PIN code in order to enter field service mode by setting
AV-132 to the desired PIN number.
Field service mode ends automatically if there is no key activity for five minutes.
BACnet FF
|
Setting field service codes
To set field service codes
1. From the home screen, press SYSTEM (left side of the screen).
2. Press and hold the center bottom key (blank) for about five seconds. See
Figure 10.
3. If a PIN code is required, use the top arrows to select the first two digits
of the code and the bottom arrows to select the third and fourth digits of
the code, and then press DONE.
The field service screen appears.
4. Press the left up or down arrows until the desired code appears. See
T able 8 on page 42 for the list of Setup Codes. NOTE: All applications
use the same Setup Codes.
5. Press the right up or down arrows to adjust the value associated with the
code.
6. Press the left up or down arrows to accept the change and scroll to a
The BACnet FF operates in one of three modes - Setpoint, Occupancy Single
Setpoint, and Occupancy Dual Setpoint.
Common features
This section describes features common to all operating modes. For descriptions
of mode-specific features, see “Checking MS/TP communication” on page 26
and “Checking MS/TP communication” on page 26.
LCD backlight operation
BV-79 controls backlight operation. If BV-79 is OFF, the backlight turns ON
when any key is pressed and stays on for 20 seconds after there is no key activity.
If BV-79 is ON, the backlight is ON continuously.
Clock operation
The BACnet FF’s real-time clock provides time and date for displaying the date
and time, implementing daylight savings settings, and implementing schedules.
If AC power is lost, a supercapacitor will power the clock for ten days. If the
date and time are lost, the BACnet FF will display the set time and date screens
when powered up.
Installation and Operations Guide
Operational overview
|
Note The real-time clock is separate from the CPU time keeping utility. It only
affects the items listed in this section.
Daylight savings (DLS) settings can be controlled by a BACnet FF or by a
BACnet Supervisor. If installer setup (ISU) parameter 330 is set to non-zero, the
BACnet FF will control DLS settings. If ISU 330 is zero, DLS is controlled by a
BACnet Supervisor.
The clock accepts time syncs from a BACnet Supervisor. If configured in DDC,
the date and time can also be set manually using the display. To den y a user
permission to set the clock, set BV-116 to 1.
The last time command, whether from the user screen or BACnet, takes
precedence.
To adjust the real-time clock
1. Press CLOCK.
2. Use the arrow keys to select a year, month, and day.
The MORE key allows a programmer to make additional screens available to
users. Enabling the display of one or more of these screens causes the MORE
key to appear on the main screen. The screens that can be made available are:
• Outside air temperature
• Inside/outside humidity
When the user presses MORE, the first enabled screen appears. Pressing
MORE again displays the next screen.
Touchscreen cleaning
If the display screen needs to be cleaned, the user presses SCREEN. The display
will lock for 30 seconds allowing the user to wipe the screen without pressing
any keys. When the display reads 0, press SCREEN to continue cleaning or
DONE to quit. Use a non-abrasive glass cleaner.
Checking MS/TP communication
You can check MS/TP communication from the display. The BACnet FF will
indicate if MS/TP packets and headers have been seen, the baud rate, and the
MAC address.
To check MS/TP communication
1. Enter field service mode. See “To set field service codes” on page 24.
2. Ensure the UC code is displayed.
3. Press the blank key usually labeled MORE (bottom row, second from
The BACnet FF is pre-loaded with DDC that lets you select one of multiple
applications. Applications for heat pumps, A/C units, and fan coil units are all
contained in the same DDC file. Using one of these applications, an installer can
configure the controller in the field - just set the MS/TP parameters, device
instance, and application [AP] (AV-49) parameters and it is ready to go.
Note When using the local user interface to change applications (AV-49), the
application defaults will NOT change and must be changed manually. However,
The Niagara-based configuration wizard will change the application specific
default values.
Advanced application settings will require a BACnet connection to a BACnet
BMS. These detailed application settings need to be reviewed to ensure all are
set correctly before enabling the device's outputs.
CAUTION Setting the [OE] field service code to ON powers up the outputs.
Ensure that the outputs are configured correctly before setting OE to ON.Failure
to do so may result in equipment damage.
1. Set field service code [OE] (BV-2) to ON to power up the outputs.
Single-speed fan with binary output start/stop. optional analog variable-speed
fan control, 1-stage auxiliary heat, optional floating or analog economizer.
Fan mode control (AV-17)
• 1 = continuous
• 2 = cycle with heating
• 3 = cycle with heating/cooling
Configurable Occupancy Modes
• SYSTEM Block: AUTO/OFF selection (Occupied/Unoccupied)
• Occupancy mode (AV-123=0, default): Schedules Occupancy states
Inputs and Outputs
• Setpoint mode (AV-123=1): Schedules Setpoints
• Dual setpoint mode (AV-123=2): Dual setpoints when Occupied
• Internal schedules enabled when BV-133 is active or ISU 160=4
• BMS schedules enabled when BV-56 is active
Ta bl e 5Inputs and Outputs: [AP] 0 and [AP] 1
PointFunction
AI-0Optional:
Use as space sensor in place of the internal space
sensor AV-104 (Set BV-32 active and BV-47 inactive)
Use as an outdoor-air sensor; maps to display
AV-103 (Set BV-47 active and BV-32 inactive)
BI-1Optional standby input (for PIR/door/window sensor)
AI-2Supply-air sensor (optional, but required for
BO-4Economizer open (optional)
BO-5Economizer close (optional)
AO-0Economizer (optional)
AO-1Analog fan speed (optional)
Wiring diagrams
BACnet FF
|
Controller Terminations
RC24VAC
C
G
Y1
O/B
W1
EC
EC
EC
VC
0-10Vdc
4-20ma
4-20ma
HPH1 AP 1
HP Cmpr
Rev Vlv
Htg Stg 1
Econ Opn
Econ Cls
Econ
VFD /SCR
Sensor *
SA Sensor
GND
BO 0
BO 1
BO 2
BO 3
BO 4
BO 5
AO 0
Com
14
AO 1
BI/AI 0
COM
BI/AI 1
COM
BI/AI 2
1
5
Fan
24V
Com
Optional
Standby
N.C. or N.O.
Optional
Condensate
alarm or fail
Figure 14 Controller terminations: [AP] 0, [AP] 1
Sequences of Operation
SYSTEM Block Control (BV-102)
30
* Optional space or outside temperature sensor.
Controller outputs are disabled when Enable Outputs [OE] BV-2 OF/On is in the
OF (inactive) state. Do not enable outputs until you are certain the wiring and
configuration is correct and complete.
When the unit is configured to run in Occupancy Mode, the SYSTEM Block
allows the user direct control of occupied or unoccupied state from the controller
display. Selecting “Auto” places the controller in Occupied state. Selecting
“OFF” places the controller in unoccupied state.
The SYSTEM Block can be hidden by setting BV-102 inactive. When the
SYSTEM Block is hidden occupancy states are controlled exclusively by the
onboard or BMS schedules.