User Guide

Document 485940
BACnet Integration Guide for
Dedicated Outdoor Air Syst ems
BACnet Int egration Guide – DOAS_08.000 Rev 2 Page | 1
DOAS_08.000 Rev 2
Document Date: 01/ 2023
Basic Unit Integration
Below are the basic int egration functions available on all equipment regardless of control mode. Some features are unit
configurat ion dependent (heating type, cooling type, etc.). The controller’s BM S point s list is st atic regardless of
configurat ion to accommodate field configuration changes, however, not all point s are applicable to every unit. Once
the required sensors are installed in the equipment, the only mandatory requirements to make the unit operational are
to enable the unit, if it hasn’t been enabled manually at the controller, and to command occupancy as desired.
Object Variable Description Active Text Inactive Text
Unit Enable/ Disable Operation
If desired, the unit can be enabled and disabled by the BM S syst em. In disabled mode, cert ain safet y sequences may operate
to prot ect the building and/ or equipment but general heating, cooling and vent ilation operat ion will not function.
BV-2 System_Enable M ast er system enable/ disable command Enabled Disabled
Unit Occupancy Control
By default, the unit occupancy is expected to be commanded by the BM S occupancy point . Alternatively, the unit occupancy
can be controlled by an internal schedule, set to always unoccupied, always occupied or controlled by a digital input by
changing the occupancy mode selection at the controller.
If the cont roller is configured for warm-up/ cool-down mode, aft er t he occupancy command is received the unit will run in
unoccupied recirculation mode until reaching the occupied temperat ure setpoint or t he warm-up/ cool down time expires
(default 30 minut es) at which point the cont roller will ent er normal occupied mode operation.
BV-3 BM S_Occupancy_Command Building Occupancy Command Unoccupied Occupied
Alarms
The following points allow the notification of any alarm and the last alarm triggered to be read, as well as active alarms that t o
be manually reset remot ely. See the unit’s full BM S points list if specific alarm monitoring or trending is desired.
BV-4 Reset _All_Alarms Alarm Reset Command Reset Normal
BV-23 Global_Alarm Global Alarm Alarm Normal
IV-5 Lat estAlm M ost recent active alarm
See Alarm Table
(0 = No Act ive Alarm)
M onitoring Unit Operation
Unit status
AV-40 Unit_St atus_M ode Unit Operation M ode/ Stat e See Stat us Mode Table
Fans and Dampers
BI-1 Exhaust_Fan_1_Status_Digital_Input Exhaust Fan 1 Status Act ive Inactive
BI-2 Supply_Fan_1_Status_Digital_Input Supply Fan 1 Stat us Active Inactive
AV-73 Exhaust_Fan_Speed_Analog_Out put Exhaust Fan Speed Analog Out put Real (%)
AV-78 Outside_Air_Damper_Analog_Out put Out side Air Damper Analog Out put Real (%)
AV-79 Supply_Fan_Speed_Analog_Output Supply Fan Speed Analog Out put Real (%)
Cooling
IV-11*
(Bit 20)
Cooling_is_On Indicat es that the unit is cooling Active Inactive
AV-42 Cooling_1_Ram p_Capacity Cooling Ramp 1 Status Value Real (%)
Heating
IV-11*
(Bit 21)
Heating_is_On Indicat es that the unit is heati ng Active Inactive
AV-51 Heating_Capacit y Heating Ramp Real (%)
Filters
IV-10*
(Bit 13)
Filter_Alarm_Digital_Input Filter Alarm Digit al Input St at us Alarm Normal
Reference Guide for BACnet Integration
Please read and save these instructions for fut ure reference. The information in this guide assumes the controller was already configured wit h
BACnet based on the original sales configuration. If the controller does not have BACnet enabled, please cont act the equipment representative
to get the necessary licensing and configuration files t o allow BACnet communication to be used.