2
• 128 controller maximum system (must be located on
same network bus segment)
• up to 32 zone controllers per system
• capable of zone humidity monitoring with field-installed
humidity sensor
• Carrier Linkage System capability
• global set point and occupancy scheduling
• sensor averaging
• foreign language support for ASCII based character set
• dedicated port for System Pilot connection
• can drive up to 4 linked damper actuators
• capable of local set point adjustment using field-
installed temperature sensor (with temperature offset)
• both controller housing and actuator are UL94-5V
plenum rated
• control complies with ASHRAE 62.1
Features/Benefits
Flexibility for every application
The VVT® zone controller is a single duct, variable volume
and temperature terminal control with a factory-integrated
controller and actuator. The VVT zone controller maintains
precise temperature control in the space by regulating the
flow of conditioned air into the space.
Buildings with diverse loading conditions can be sup-
ported by controlling reheat (single duct only) or supple-
mental heat. The VVT zone controller can support
two-position hot water, modulating hot water, 3-stage elec-
tric heat, or combination baseboard and ducted heat.
Carrier linkage system compatibility
When linked to a Carrier Linkage System, the VVT zone
controller provides numerous features and benefits such as
weighted average demand for system operation, reference
zone temperature and set points, set point averaging, glo-
bal set point schedule, and occupancy scheduling.
Additional control features
The VVT zone controller provides additional control fea-
tures such as Occupied/Unoccupied scheduling initialized
via the network. The zone controller offers override
invoked from a wall sensor during unoccupied hours from
1 to 1440 minutes in 1-minute increments. Optional CO
2
control or relative humidity monitoring are also available.
Simple actuator connection
The VVT zone controller control assembly contains an
integral VVT actuator assembly that is field mounted to the
terminal damper shaft, similar to the mounting of a stan-
dard actuator. The actuator is rated at 35 lb.-in. (3.95 N-m)
torque, a 90-degree stroke, and provides 90-second nomi-
nal timing at 60 Hz. The actuator is suitable for mounting
onto a
3
/
8
-in. (9.5 mm) square or round VVT box damper
shaft, or onto a
1
/
2
-in. (13 mm) round damper shaft.
The minimum VVT box damper shaft length is 1
3
/
4
-in.
(45 mm). The VVT zone controller is designed for vertical
or horizontal mounting.
Ease of installation
The VVT zone controller is provided with removable con-
nectors for power, communications, and damper. The
VVT zone controller has non-removable screw type con-
nectors for inputs. The VVT zone controller also provides
an RJ-14 modular phone jack for the Carrier network
software connection to the module via Carrier network
communications.
User interface
The VVT zone controller is designed to allow a service per-
son or building owner to configure and operate the unit
through the System Pilot user interface. A user interface is
not required for day-to-day operation. All maintenance,
configuration, setup, and diagnostic information is avail-
able through the Level II communications port to allow
data access by an attached computer running Network Ser-
vice Tool or ComfortVIEW
™ software.
Functions
• Pressure dependent space temperature control for sin-
gle duct, series fan powered and parallel fan powered
air terminals
• Auxiliary heat functions including two-position hot
water valve, 3 stages of electric heat, modulating hot
water valve and combination radiant/ducted heat stages
• T55/T56 wall mounted space temperature sensor
interface
• T56 space temperature set point reset (slide
potentiometer)
• Timed override (T55/T56 pushbutton) with one-minute
granularity
• Space temperature and set point reset sharing
• Display of relative humidity based on local or remote
sensor
• Local occupancy control
• Remote occupancy override
•Airside linkage
• Linkage function for multiple terminals with and without
an air source
• Adaptive optimal start (AOS)
• Sensor grouping function
• Commissioning functions
• System-wide air balancing
•Damper calibration
•Sensor trim
• Carrier network tables and alarms
• Demand Controlled Ventilation (DCV)
•Analog CO
2
monitoring and control
• Loadshed/redline response
• System Pilot interface
105
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