Appendix A: VAV Zone Controller Points/Properties
Unoccupied Heating 2
– Dark Blue
The space temperature must be less than the
Unoccupied Heating 2
setpoint to generate an
unoccupied low space temperature alarm. We recommend that this value be set no less than
0.5∆°F (.27∆
°C) below the
Unoccupied Heating 1
setpoint.
D:
R:
52°F (11.1°C)
40 to 90°F
(4.4 to 32.2°C)
Unoccupied Cooling 1
– Yellow
The space temperature must be greater than the
Unoccupied Cooling 1
setpoint for the VVT
Master to consider the zone an unoccupied cooling caller in a linked system. In a single-zone
application, the unoccupied cooling requirement begins as soon as the space temperature
exceeds the
Unoccupied Cooling
setpoint. We recommend that the
Unoccupied Cooling 1
value be set no less than 0.5∆°F (.27∆°C) above the
Unoccupied Cooling
setpoint.
D:
R:
91°F (32.8°C)
45 to 99°F
(7.2 to 37.2°C)
Unoccupied Cooling 2
– Orange
The space temperature must be greater than the
Unoccupied Cooling 2
setpoint to generate
an unoccupied high space temperature alarm. We recommend that this value be set no less
than 0.5∆°F (.27∆°C) above the
Unoccupied Cooling 1
setpoint.
D:
R:
93°F (33.9°C)
45 to 99°F
(7.2 to 37.2°C)
Point Name/Description
Range
Heating Capacity
– Used for Optimal Start, this is the rate at which the zone temperature
changes when the heating system runs at full capacity to maintain designed occupied
heating setpoint.
D:
R:
5∆°F (2.7∆°C)
0 to 120∆°F
(0 to 66.6∆°C)/hr
Heating Design Temp
– The geographically-based outdoor air temperature at which the
heating system must run constantly to maintain comfort. This information is available in
ASHRAE publications and most design references.
D:
R:
0°F/C
-100 to 150°F
(-73.3 to 65.5°C)
Cooling Capacity
– Used for Optimal Start, this is the rate at which the zone temperature
changes when cooling system runs at full capacity to maintain designed occupied cooling
setpoint.
D:
R:
5∆°F (2.7∆°C)
0 to 140∆°F
(0 to 77.7∆°C)/hr
Cooling Design Temp
– The geographically-based outdoor air temperature at which the
cooling system must run constantly to maintain comfort. This information is available in
ASHRAE publications and most design references.
Displays the value set in
Min Setpoint Separation
.
D:
R:
100°F (37.7°C)
-100 to 150°F
(-73.3 to 65.5°C)
56
VAV Zone Controllers
