Carrier VVT Zone - Sequence of Operation; Temperature Sensors

Sequence of operation
40 VVT Zone Controller
The VVT Zone Controller supports 3 types of pressure-dependent terminal configurations:
• Single duct
• Series fan-powered
• Parallel fan-powered
The controller can operate as part of a linked VVT system or as a stand-alone controller.
Temperature sensors
The VVT Zone Controller supports the following temperature sensors:
Sensors
Notes
Space temperature sensors:
• SPT Standard, Plus, or Pro
You can average up to 5 SPT communicating sensors.
• T55
Push the sensor's override button from 2 to 10 seconds to initiate a
timed override.
If a network space temperature value is used, that value must be
written to the BACnet space temperature point (system_spt) at 1 to
5 minute intervals or on a COV of 0.1°F.
To reference another zone as your space temperature input, read
the BACnet point zone_temp by using the network point
System
Space Temperature
.
Duct temperature sensors:
• Duct Air Temperature (DAT)
10K Type II.
If the zone does not have ducted reheat, install a DAT sensor on the
inlet of the damper.
• Supply Air Temperature (SAT)
If the zone has ducted reheat, install an SAT sensor downstream of
the reheat source. The SAT is used in controlling the reheat.
The DAT/SAT determines the air source mode if Linkage
communication fails or if the controller is stand-alone. See Air
Source Mode Determination 47 (page ) for details.
See the Carrier Sensors Installation Guide for details on these sensors.
Sequence of operation