Daikin BACnet IM 1234-1 Manual

Installation and Maintenance Manual IM 1234-1
Group: Applied Air Systems
Part Number: IM 1234
Date: December 2014
BACnet®Thermostat
Use with Daikin MicroTech®Integrated Systems
or as standalone

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Table of ConTenTs
Table of ConTenTs
Introduction..................................3
Revision History .............................3
Reference Documents ........................3
Limited Warranty .............................3
General Information ..........................3
Hazardous Information Messages ...............3
Specications ................................4
User Interface ...............................4
Security ....................................4
Display Type ................................4
Inputs and Outputs ...........................4
Analog Inputs ...............................4
Relay Outputs ...............................4
Connectors .................................4
Communications – BACnet MS/TP ...............4
Accuracy ...................................4
Regulatory..................................4
Environmental Limits..........................5
Installation ..................................5
Dimensions .................................5
BACnet Thermostat Product Numbers ............5
BACnet Thermostat Model Nomenclature .......5
Installation...................................6
Installing the BACnet Thermostat ................6
Connecting Inputs ............................7
Connecting Outputs ..........................8
Connecting Power............................9
Maintenance ................................9
Program Set Up .............................10
User Functions .............................10
Commissioning Functions .....................14
Set Up Communications ......................16
Set the Time and Date .......................17
Setting the Occupancy Schedule ...............18
Set Fan Coil Unit System Options...............19
Set Rooftop Unit System Options ...............21
Set Heat Pump Unit Systems Options ...........23
Advanced Options...........................25
Sequences of Operation ......................27
Room Temperature Setpoints ..................27
Occupancy ................................27
Automatic Cooling and Heating Changeover ......27
Schedules .................................27
PID Control Loops...........................28
Valve Operation for Fan Coil Units ..............28
Fan Operation for Fan Coil Units ...............28
Modulating Cooling and Heating
for Rooftop Units ............................29
Staged Heating and Cooling for Rooftop
and Heat Pump Units ........................29
Fan Control for Rooftop and Heat Pump Units .....30
Economizer Cooling for Rooftop
and Heat Pump Units ........................30
Heat Pump Unit Specic Functions..............30
Application Drawings.........................31
Fan Coil Unit Applications .....................31
Rooftop Unit Applications .....................39
Heat Pump Unit Applications...................43
System Integration ...........................45
Connecting to a Network......................45

InTroduCTIon
www.DaikinApplied.com 3 IM 1234-1 • BACNET THERMOSTAT
InTroduCTIon
Revision History
Version Number Date Comment
IM 1234-1 December, 2014 Initial Release
Reference Documents
Number Title Company Source
ED 19053 BACnet Thermostat Daikin Applied www.DaikinApplied.com
Limited Warranty
Consult your local Daikin Applied representative for warranty
details. To nd your local Daikin Applied representative, go to
www.DaikinApplied.com
General Information
This manual provides general information about the BACnet
thermostats. The controllers are space mounted devices that
combine a BACnet controller with temperature sensors. The
controllers include programs for the following applications.
• Roof top units, both single or multi-stage
• Heat pumps
• Two and four pipe fan coil units
The BACnet thermostats are native BACnet, Application
Specic Controllers. BACnet communication parameters,
device instance, MAC address, baud rate, user adjustments,
and application conguration values are set from password
protected front panel controls.
All models feature an integrated BACnet schedule and
hardware real-time clock with 72-hour capacitor backup for
standalone operation or network time synchronization.
A two-piece mechanical design, featuring a removable
backplate, facilitates easy wiring and installation.
Hazardous Information Messages
CAUTION
Cautions indicate potentially hazardous situations, which can
result in personal injury or equipment damage if not avoided.
WARNING
Warnings indicate potentially hazardous situations, which can
result in property damage, severe personal injury, or death if
not avoided.
DANGER
Dangers indicate a hazardous situation which will result in
death or serious injury if not avoided.
NOTICE
Notices give important information concerning a process,
procedure, special handling or equipment attributes.

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speCIfICaTIons
speCIfICaTIons
User Interface
The user interface is a color display and has ve push buttons.
Through the menu driven display, an operator can do the
following.
• Add or change user passwords
• Change setpoints
• Set BACnet addressing
• Set up and commission the installation
• Congure any available options
Security
Separate passwords for users and controls technicians.
Display Type
• 128 × 128 pixels
• Active color LCD with LED back lighting
• 1.00 × 1.04 inches (25 × 26 mm)
Inputs and Outputs
All inputs and outputs are pre-programmed and application
specic. No eld conguration is required for most installations.
For details on input and output connections see the section
Application Drawings on page 31.
Analog Inputs
Analog inputs represent BACnet analog input objects and are
congured for discharge air temperature, remote temperature
sensor, water temperature sensor, and fan status. Not all input
sensors are applicable or required for all models.
• Sensors are automatically detected
• Inputs accept industry-standard 10,000Ω, Type II or Type
III thermistor sensors
• Input overvoltage protection up to 24 volts AC, continuous
• 12-bit analog-to-digital conversion
• Short-circuit protected
• Loads up to 10 mA at 0-12 volts DC
• 8-bit PWM digital-to-analog conversion
Relay Outputs
Relay outputs are congured to represent BACnet binary
objects. The outputs control ON/OFF valves, speeds for three-
speed fans, fan start circuits, or other equipment that requires
an on or off input signal.
• All relay outputs are normally open, SPST, Form “A”
relays
• 1 Ampere maximum per relay at 24 volts AC or DC for
each output. Maximum for all relay outputs is 3 amperes
(72VA)
Connectors
• Screw terminal block mounted to backplate
• Wire size 14-22 AWG
Communications – BACnet MS/TP
• Integral peer-to-peer BACnet MS/TP network
communications
• Network speeds from 9600 to 76,800 baud
• Front panel congurable device instance, MAC address,
and baud
• Automatic baud detection
• Screw terminal block mounted to backplate; wire size
14-22 AWG
• Meets or exceeds ANSI/ASHRAE BACnet Standard 135-
2008 for Application Specic Controllers
Accuracy
Type Thermistor
Accuracy ±0.36°F (±0.2°C)
Resistance 10,000Ω at 77°F (25°C)
Operating Range 48 to 96°F (8.8 to 35.5°C)
Regulatory
• UL 916 Energy Management Equipment
• FCC Class A, Part 15, Subpart B and complies with
Canadian ICES-003 Class B
• SASO PCP Registration KSA R-103263
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.

speCIfICaTIons
www.DaikinApplied.com 5 IM 1234-1 • BACNET THERMOSTAT
Environmental Limits
Operating 32 to 120°F (0 to 49°C)
Shipping -40 to 140°F (-40 to 60°C)
Humidity 0-95% relative humidity (non-condensing)
Installation
Supply Voltage
24 volts AC (-15%, +20%), 50-60 Hz, 12 VA, Class 2 only,
non-supervised. All circuits, including supply voltage, are
power limited circuits.
Weight Approx 6 ounces (170 grams)
Case Material Flame retardant plastic
Dimensions
Figure 1: BACnet Thermostat Dimensions
Table 1: BACnet Thermostat Dimensions
A B C
3.50 in (89 mm) 5.12 in (130 mm) 1.12 in (29 mm)
BACnet Thermostat Product
Numbers
Description Product Number Model Number
Fan Coil Unit
2-pipe and 4-pipe
Modulating or ON/OFF valves
Modulating or Three-Speed Fan
2508035 MIT-FA-005
Roof Top Unit
Modulating or ON/OFF valves
One or two-stages heat
One or two stages cooling
Fan control
Economizer
2508034 MIT-RA-007
Heat Pump Unit
3 heat, 2 cool
Fan Control
Economizer
2508036 MIT-HA-009
BACnet Thermostat Model Nomenclature
MIT F A 0 0 6
MicroTech Integrated Thermostat
Unit Type
F = Fan Coil
R = Rooftop
H = Heat Pump
Vintage
Application
Humidity Sensor
1 = Humidity Sensor
0 = No Humidity Sensor
Motion Sensor
1 = Motion Sensor
0 = No Motion Sensor

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InsTallaTIon
InsTallaTIon
Installing the BACnet Thermostat
This section provides important instructions and guidelines
for installing the BACnet Thermostat. Carefully review this
information before installing the controllers.
Mounting the BACnet Thermostat
For the most accurate performance, install the BACnet
Thermostat on an inside wall where it can sense the average
room temperature. Avoid locations with direct sunlight, heat
sources, windows, air vents, and air circulation or obstructions
such as curtains, furniture, etc.
The BACnet Thermostat must not be:
• Mounted on an exterior wall
• Mounted on or near an object with a large thermal mass
such as a concrete block wall
• Blocked from normal air circulation by obstructions
• Exposed to heat sources such as lights, computers,
copiers, or coffee makers, or to direct sunlight at any time
of the day
• Exposed to drafts from windows, diffusers, or returns
• Exposed to air ow through connecting conduits or empty
spaces behind walls
Rough-in Preparation
Complete rough-in wiring at each location before mounting a
BACnet Thermostat. This includes the following steps.
• Install the supplied mounting base directly to a wall, a
vertical electrical box, or a box with a wall plate kit
• Routing the connecting cable or cables from the BACnet
Thermostat to the equipment it is controlling
• Block leaks and airow from conduits with plumber’s putty
or similar material
• If replacing an existing thermostat, label existing wires for
reference when removing the existing thermostat
Figure 2: BACnet Thermostat Mounting Base Details
Installing the BACnet Thermostat
CAUTION
Can cause equipment damage.
To prevent mounting screw heads from touching the circuit
board in the controller, use only the mounting screw supplied
by Daikin Applied. Using screws other than the type supplied
may damage the BACnet Thermostat.
To install the controller on a mounting base, do the following:
1. Turn the Allen screw in the base of the sensor clockwise
until it clears the case.
2. Swing the BACnet Thermostat away from the mounting
base to remove it.
3. Route wiring for the BACnet Thermostat through the
mounting base.
4. Position the base with the embossed UP toward the
ceiling and fasten it directly to a vertical 2 × 4 inch
electrical box.
5. Connect the wires for the BACnet Thermostat to the
terminals in the mounting base.
6. Place the top of the sensor over the top of the mounting
base and swing it down over the Allen screw bracket. Be
careful not to pinch any wiring.
7. Turn the Allen screw counterclockwise until it backs out
of the mounting base and engages the case.
Figure 3: Allen Head Directions

InsTallaTIon
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Connecting Inputs
The inputs for the BACnet Thermostat are congured for
specic functions and do not require set up in the eld. Not all
inputs are required for every application.
Remote Space Temperature Sensor
(optional)
Connect a 10kΩ, Type II thermistor temperature sensor to
the remote space temperature (RS) input and ground (GND)
terminals. The input includes the internal pull-up resistor.
Follow the instructions supplied with the sensor for installation.
When a remote space temperature input is connected to the
BACnet Thermostat, the remote temperature is used instead of
the internal temperature sensor.
Figure 4: Wiring for Remote Space Temperature Sensor
Discharge Air Temperature
Connect a 10kΩ, Type III thermistor temperature probe to the
discharge air temperature (DAT) input. The input includes the
internal pull-up resistor. Follow the instructions supplied with
the sensor for installation.
Figure 5: Wiring for Discharge Air Temperature Sensor
Fan Status Switch (optional)
Connect a Normally Closed Fan Status switch to the Discharge
Air Temperature (DAT) input and ground (GND) terminals.
The input includes the internal pull-up resistor. Follow the
instructions supplied with the switch for installation.
Figure 6: Wiring for a Fan Status Switch
Water Temperature Sensor
Connect a 10kΩ, Type III thermistor temperature probe to the
water temperature (WST) input. The input includes the internal
pull-up resistor. Follow the instructions supplied with the sensor
for installation.
NOTE: The water temperature sensor is a required input
sensor for 2-pipe fan coil units.
Figure 7: Wiring for a Water Temperature Sensor
Outside Air Temperature
Connect a 10kΩ, Type III thermistor temperature probe to the
outside air temperature (OAT) input. The input includes the
internal pull-up resistor. Follow the instructions supplied with
the sensor for installation.
Figure 8: Wiring for an Outside Air Temperature Sensor

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InsTallaTIon
Connecting Outputs
CAUTION
Can cause equipment damage.
Improperly connecting loads or equipment to output terminals
may damage the equipment. Connect only as shown in the
following diagrams or application drawings.
The BACnet Thermostat outputs are product dependent and
are congured for specic applications.
• No eld programming or set up is required or possible
• Depending on model and application, the BACnet
Thermostat outputs are designed for either 24 volt AC or
0-10 volt DC loads
• The outputs may represent analog or digital signals
Connecting to a Three-Speed Fan
The following diagram shows the connections for a three-
speed fan. The fan circuits must be a 24-volt AC pilot duty only.
• For a single-speed fan, use only the FAN-L connection
• For a two-speed fan, use the FAN-L and Fan-H
connections
• For a three-speed, use FAN-L, FAN-M, and FAN-H
Figure 9: Connections to a Three-Speed Fan
Connecting to a Modulating Fan
The following diagram shows the connections for a modulating
speed fan.
• The fan start circuit must be a 24-volt AC circuit. Connect
it to the FAN-L output
• The speed control is a 0-10 volt DC analog output
Figure 10: Connections for a Modulating Fan
Connecting ON/OFF Valves
The following diagram shows the connections for ON/OFF
valves.
• The valves are activated by 24-volts AC
• The outputs are 24-volt relays
Figure 11: Connections to ON/OFF Valves
Connecting to Modulating Valves
The following diagram shows the connections for modulating
mixing valves. The valve control signal is a 0-10 volt analog
output.
Figure 12: Connections To Modulating Heating and
Cooling Valves

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www.DaikinApplied.com 9 IM 1234-1 • BACNET THERMOSTAT
Connecting Power
The BACnet Thermostat requires an external, 24 volt AC power
source. Use the following guidelines when choosing and wiring
transformers.
• Use only a Class-2 transformer of the appropriate size to
supply power
• Daikin Applied recommends powering the BACnet
Thermostat from a dedicated controls transformer
• Connect the transformer’s neutral lead to the COM
terminal
• Connect the AC phase lead to the 24VAC terminal
• Power is applied to the controller when the transformer is
powered
Figure 13: Wiring for BACnet Thermostat Power
Maintenance
Remove dust as necessary from the holes in the top and
bottom. Clean the display with a soft, damp cloth and mild
soap.

IM 1234-1 • BACNET THERMOSTAT 10 www.DaikinApplied.com
program seT up
program seT up
User Functions
This section covers topics for the end user in a facility.
BACnet Thermostat user functions are limited to changing the
following functions.
• Active temperature setpoints
• Fan operation
• Changing between heating and cooling
• Override scheduled occupancy or occupancy based on
the schedule in the BACnet Thermostat
• Change the display between Fahrenheit and Celsius
Operating the BACnet Thermostat
BACnet Thermostat functions are accessible through a user
interface consisting of simple, context sensitive menus.
The menus are opened and options are selected by using
the buttons and a color display on the front of the BACnet
Thermostat.
• Pressing either the up button ▲or down button ▼
changes a selection, setting, or value
• Pressing the Enter button saves the selected setting or
value. The Enter button is the middle of the three buttons
below the display
• Saving a selection also advances to the next display
Figure 14: BACnet Thermostat Display and Buttons
The three buttons below the display are dened by labels in
the soft key bar. The buttons are designated for the following
functions.
• Back – Returns to the previous menu
• Cncl – Cancels current changes
• Done – Push this button at any point while entering a
value. For example, if you have entered the rst two digits
of a password and the remaining two digits are correct,
pushing Done completes the entry of the password
• Enter – Pushing this button enters the selection and
advances to the next step
• Exit – Returns to temperature display
The operating modes of the BACnet Thermostat are
represented by the display icons.
Table 2: Operating Mode Icons
Icon Description Mode
The FAN icon rotates when the system fan is operational. In systems with multispeed fans the icon rotation is the same
regardless of speed. When fan operation is set to automatic, the word “Auto” is placed under the icon. Fan
Occupied – Occupancy is set to occupied by the schedule maintained in the controller or through the network. Occupancy
Unoccupied – Occupancy is set to unoccupied by the schedule maintained in the controller or through the network. Occupancy
Override – A user has entered temperature setpoints that override the unoccupied setpoints. Occupancy
Cooling – The system will cool the space until the cooling setpoint is reached. The icon is in motion when cooling is
taking place. Heating/Cooling
Heating – The system will heat the space until the heating setpoint is reached. The icon is in motion when heating is
taking place. Heating/Cooling
Off System is OFF. Heating/Cooling