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Sequence of operation
Sequence of operation
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
Space temperature sensors:
•
SPT Standard, Plus, or Pro
•
T55
Duct temperature sensors:
•
Duct Air Temperature (DAT)
•
Supply Air Temperature (SAT)
See the Carrier Sensors Installation Guide for details on these sensors.
40
Notes
You can average up to 5 SPT communicating sensors.
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.
10K Type II.
If the zone does not have ducted reheat, install a DAT sensor on the
inlet of the damper.
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
(page
47
) for details.
VVT Zone Controller
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