GENERAL
The zone controller is a single duct, fan poweled, Variable
Volume and Temperatme (VVT®) terminal control with a
factory-integrated controller and actuatol: The VVT zone con-
troller maintains precise temperature control in the space
by operating the temrinal fan and regulating the flow of
conditioned air into file space. Buildings with diverse loading
conditions can be supported by controlling equipment heating
and cooling sources or supplemental heat.
The VVT zone controller (33ZCVVTZC-01) provides
dedicated control lunctions for single duct terlninals with
modulating heat, up to 3 stages of ducted heat, or combination
baseboard and ducted heat. A relay bomd (33ZCOffFBRD-01)
is required for heat or fan terminals.
Carrier's 3VTM control system provides optimized equip-
merit and component control through airside linkage. Linkage
refers to the process through which data is exchanged between
the air terminals and the air source that provides the supply air
to those terminals. The process "links" the terminals and the air
source to form a coordinated system. Linkage allows the air
source to operate efficiently and reliably while responding to
and satisfying changing conditions in the zones. Linkage also
allows the terminals to respond properly to changes in the air
source. A VVT zone controller configured as the Linkage
Coordinator manages the flow of data between the air source
and the VVT system zones.
Rooftop units, air handlers, fan coils, and water source heat
pumps feature product integrated or factory-installed controls
that are dilectly compatible with the 3V control system. The
rooftop units, air handlel_, fan coils, and water source heat
pumps do not require any special hardw_ue to be compatible
with the Carrier linkage system. Consult your local Carrier
representative for the complete list of compatible air source
controllers. Figure 1 shows an example of a Carrier linkage
system.
The VVT zone controllers are available factory-mounted to
Carrier's round and rectangular dmnpers. Round dampers tue
available in 6, 8, 10, 12, 14, and 16-in. sizes. Rectangular
dampers me available in 8x10, 8x14, 8x18, and 8x24-in. sizes.
All damper assemblies are equipped with an integrated duct
tenlperature sensor.
INSTALLATION
General -- The VVT zone controller is a microprocessor-
based direct digit_d control (DDC) controller that can be pur-
chased or installed on vtuiable volume and temperature (VVT)
air termin_ds. It can be letrofitted on units manufactured by
C_urier or oilier manufacturel_ to provide plessme dependent
VVT control.
Each zone controller has the ability to lunction as a linkage
coordinator for systems with up to 32 zones. As a linkage
coordinator, a zone controller will retrieve and provide system
information to the rooftop or air-handling equipment and other
zone controllers. A zone controller can function as a stand
alone device by installing a duct air sensoc
The zone controller is connected to a wall-mounted, field-
supplied, space temperature sensor (SVF) in order to monitor
zone temperature changes and satisfy zone demand.
On stand-alone applications or applications with ducted or
modulating heat, the zone controller must be connected to a
field-supplied supply air temperature (SAT) sensor to monitor
the temperature of the air delivered by the air terminal. A
System Pilot can be used to adjust set points, set operating
ptu'ameters, and lully configure the zone controller or any
device on the system. A System Pilot can also provide local
space temperature, set point adjust, time broadcast, and sched-
ule adjustment for a single dedicated or remote device.
Canier's network software can be connected to the system
at the SPT sensor if Cturier network communication wiring is
run to the SPT sensol: The network software can be used to
adjust set points, set operating parmneters, and fully configure
the zone controller or any device on the system.
Zone Controller Hardware -- The zone controller
consists of the following hm'dwm'e:
• terminal control module
• torque-limiting integrated damper actuator
• plastic enclosure
• one no. 8 x 1/2-in. self-drilling sheet metal screw (to pre-
vent zone controller rotation)
Figure 2 shows the zone controller physical details.
Field-Supplied Hardware -- Each zone controller re-
quires the following field-supplied components to complete its
inst_dlation:
• air terminal unit (unless factory installed -- when pur-
chased as factory-installed option an SAT [supply-air
temperature] sensor is provided upstream of the damper
blade)
• round or rectangular mounting bracket (for retrofit
applications)
• space temperature sensor
• transformer-- 24 vac, 40 va
• two no. 10 x l/2-in, sheet metal screws (to secure SAT
sensor to duct, if required)
• two no. 6-32 x 5/s-in. screws (to mount SPT [space tem-
peraturel sensor base to electrical box)
• contactors (if required for fan or electric heat)
• supply air temperature sensor (required for terminal with
ducted heat)
• option board 33ZCOPTBRD-01 (required for auxiliary
heat or fan terminals)
• indoor air quality sensor (if required)
• relative humidity sensor (if required)
• one SPST (single pole, single throw) relay
• valve and actuator for hot water heat (if required)
• wire
• bushings (required when mounting SAT sensor in a duct
6-in. or less in diameter)
• primary air temperature sensor (if required)
SPACE TEMPERATURE SENSOR-- Each zone control-
ler requires a field-supplied Cmrier space temperature sensol:
There me throe senso]_ available for flris application:
• 33ZCT55SPT. Space Temperature Sensor with Override
Button
• 33ZCT56SPT. Space Temperature Sensor with Override
Button and Set Point Adjustment
• 33PILOT-01, System Pilot Space Temperature Sensor.
User Interface, and Configuration Device
The System Pilot is a user interface to the Zone Controller
wifll a full complement of zone display features that can be
used to configure and operate the Zone Controllel: It has an
SPT sensor and can transmit its value to the Zone ControlleL
The System Pilot communicates to the Zone Controller
through the Zone Controller's dedicated Comm2 port or over
the main communication bus through Comml.
OPTION BOARD- The option board (33ZCOPTBRD-01)
is required for use of auxilimy heat and fan control functions.
The Option Board is field installed and provides four triac
discrete outputs, three for supplemental heat and one for the fan
output.
PRIMARY AIR TEMPERATURE SENSOR -- A field-
supplied, primary air temperature (PAT) sensor (part number
33ZCSENPAT) is used on a zone controller which is lhnction-
ing as a Linkage Coordinator for a non Carrier Network/
Linkage compatible air source.
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