United Technologies Carrier Unit Vent Open Integration Manual page 30

BACnet System Valid Range
Points Display
Name
Vu® only)
3 = BAS On/Off (third
party control)*
4 = Remote Occ Input
BAS On/Off* 1=Inactive
(Occupancy) 2=Occupied
Occupancy control 3=Unoccupied
configuration ust be
set for 3 = BAS
On/Off
* Modbus, N2, and LonWorks default values only apply to multi-protocol controllers.
† Points do not apply to multi-protocol controllers.
Reading System Points
To verify that the system point is being written to within the refresh time specified (value varies by point), the i-
Vu® Open controller clears any value that is written, once it has been processed by the controller and returned
the system point to its default value. Therefore, a BAS should never read back the system point's value to confirm
the commanded value was successfully received. To confirm a write, refer to the table below for the corresponding
control point that should be read.
NOTE A confirming "read" should take place at least 30 seconds following the "write" to verify that the write has
been processed by the controller.
Commanded Points
Type /
Display Name
Instance
System Space av:1902
Temperature
System Space av:1904
RH
System Space av:1903
AQ
System OA av:1901
Temperature
[OA] Enthalpy bv:1901
(BACnet)
System Outdoor av:1908
AQ
System Water av:1905
Temperature
Unit Ventilator
Integration Guide
BACnet/
Modbus
/N2 Default Value*
(Only available
through BACnet)
Inactive (1)
Control Points
Object Name Display Name
system_spt Space Temperature
- Prime Variable
system_rh Space Relative
Humidity
system_iaq Indoor Air Quality
CO2 (ppm)
system_oat Outdoor Air
Temperature
oae [OA] Enthalpy
Status
system_oaq Outdoor Air Quality
CO2 (ppm)
system_water_t Changeover Mode
emp
27
Appendix A: Unit Vent Network Points List
LonWorks Recommended Write
Default Value* Rrefresh
Time
(min/max)
Inactive (1) On change of state
Type /
Object Name
Instance
av:2007 space_temp
av:1011 space_rh
av:1009 iaq
av:1003 oa_temp
bv:1002 enthalpy_status
av:1012 oaq
av:1014 chgovr_mode
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