Carrier VVT Zone - Page 58

Appendix A: VVT Zone Controller Points/Properties
54 VVT Zone Controller
The occupied setpoints described below are the setpoints under normal operating conditions. The Demand Level 1–3
setpoints apply if demand limiting is used.
Occupied Setpoints
Demand limiting is a cost-saving strategy to reduce energy consumption. The strategy expands the occupied heating and
cooling setpoints when the system reaches one of 3 levels of consumption. With the expanded setpoints, the equipment
works less, thereby saving energy. By default, Demand Level 1 expands the occupied heating and cooling setpoints by 1°F,
Demand Level 2 by 2°F, and Demand Level 3 by 4°F. If the occupied heating or cooling setpoints change, the (effective)
demand level setpoints automatically change by the same amount. See Sequence of Operation 40 (page ) for more
information.
Default
Range: 40 to 99°F
Demand Level
Point Name/Description
Occupied
1
2
3
Occupied Heating
70°F – Green
The heating setpoint the controller maintains while in occupied mode.
69°F 68°F 66°F
Occupied Cooling
74°F – Green
The cooling setpoint the controller maintains while in occupied mode.
75°F 76°F 78°F
Occupied Heating 1
– Light Blue
The space temperature must be less than this value for the VVT Master to
consider the zone a heating caller. The zone remains a heating caller until the
space temperature rises above the
Occupied Heating
setpoint. We recommend
that this value be set no lower than .5°F below the
Occupied Heating
69°F
setpoint.
68°F 67°F 65°F
Occupied Heating 2
67°F – Dark Blue
The space temperature must be less than this value to generate a low space
temperature alarm.
66°F 65°F 63°F
Occupied Cooling 1
– Yellow
The space temperature must be greater than this value for the VVT Master to
consider the zone a cooling caller. The zone remains a cooling caller until the
space temperature drops below the
Occupied Cooling
setpoint. We recommend
that this value be set no lower than .5°F above the
Occupied Cooling
75°F
setpoint.
76°F 77°F 79°F
Occupied Cooling 2
77°F – Orange
The space temperature must be greater than this value before a high space
temperature alarm is generated.
78°F 79°F 81°F
Unoccupied Setpoints
Point Name/Description
Range
Unoccupied Heating
D: – Gray
The heating setpoint the controller maintains while in unoccupied mode.
R:
55°F
40 to 90°F
Unoccupied Cooling
D: – Gray
The cooling setpoint the controller maintains while in unoccupied mode.
R:
90°F
55 to 99°F