Application 6 - Fan Coil Unit - 4 Pipe - Honeywell BACnet Quick Reference Manual

BACNET® FIXED FUNCTION THERMOSTAT
APPLICATION 6 – FAN COIL UNIT – 4 PIPE
THREE POINT FLOATING COOLING AND HEATING
MS/TP Network
Digital
Digital
Standby Binary Contact
Sensor (optional)
Features and Notes
• Three modes of schedule control set by AV-123 –
0 = Single point with offset during occupancy,
1 = Dual setpoint residential – wake, leave, return & sleep,
2 = Dual setpoint with offset occupancy.
• BACnet MS/TP compliant.
• English or metric units.
• Outputs are disabled if BV-2 is off.
• Disable operator access via the display to the schedule
by setting BV-102 to off.
• Onboard schedule can be enabled or disabled (BV-40).
• Heating and cooling are disabled if the fan is off.
• Use up and down arrows on the display to force the unit
into occupancy for four hours.
• Setpoint mode emulates residential thermostat
operation.
• Fan can be set to run continuously or cycle on and off for
heating or cooling demands while in Occupancy mode
(AV-17).
• Fan can be either on/off or analog variable speed
control.
• Analog economizer control is defaulted to disabled.
• Economizer requires a supply air sensor connected to
AI-2.
• The cooling and heating valves can be controlled by
either a cooling and heating signal or via the supply air
temperature (BV-15).
• AI-0 Can be configured for either Space or Outside Temp
sensor.
• Humidity control can be enabled for un-occupancy
(BV-12 & BV-53).
• Use a 10K Type II Thermistor Sensor for AI-0 and AI-2
Inputs.
31-00099—01
3 Point Floating
3 Point Floating
Space or Outside
Condensate Sensor
Temperature Sensor
(optional)
Supply
Temperature Sensor
(required for economizer
(optional)
control)
• To configure AI-0 as a sensor set the following
parameters.
Space Temperature
Outside Temperature
Controller Terminations
1
24VAC RC
5
GND
C
BO 0
G
BO 1
Y1
BO 2
Y2
BO 3
W1
BO 4
W2
BO 5
AO 0
EC
Com
14
VC
AO 1
BI/AI 0
COM
BI/AI 1
COM
BI/AI 2
* Optional space or outside temperature sensor.
10
Inputs
AI-0:: Space Sensor or Outside Air
Sensor (optional)
AI-2:: Supply Air Sensor (optional,
required for economizer control)
BI-1:: PIR/Door/Window Sensor
(optional)
BI-2:: Condensate Alarm (optional)
Outputs
BO-0:: Fan
BO-1:: Cooling Valve Open
BO-2:: Cooling Valve Close
BO-3:: Heating Valve Open
BO-4:: Heating Valve Close
BO-5:: Not used
AO-0:: Economizer (optional analog)
0-10V or 4-20mA
AO-1:: Fan Speed Control (optional)
4-20mA VFD/SCR
Note: Any I/O listed as "optional" will
require a BV to be set. Refer to the
sequence of operations outlined in
the BACnet FF Thermostat System
Engineering Guide, 31-00098.
BV-47 (PS)
Off
On
4PFC AP 6
Fan
C Vlv Op
C Vlv Cl
H Vl Op
H Vlv Cl
0-10Vdc
24V
Econ
4-20ma Com
VFD /SCR
4-20ma
Sensor *
SA Sensor
BV-32 (Sr)
On
Off
Optional
Standby
N.C. or N.O.
Optional
Condensate
alarm or fail