Carrier 33ZCVAVTRM Specifications download pdf (Page 30)

GENERAL

The zone controller is a single duct, fan powered, Variable

Volume and Temperature (VVT®) terminal control with a

factory-integrated controller and actuator. The VVT zone con-

troller maintains precise temperature control in the space

by operating the terminal fan and regulating the flow of

conditioned air into the 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 functions for single duct terminals with

modulating heat, up to 3 stages of ducted heat, or combination

baseboard and ducted heat. A relay board (33ZCOPTBRD-01)

is required for heat or fan terminals.

Carrier’s 3V™ control system provides optimized equip-

ment 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 directly compatible with the 3V control system. The

rooftop units, air handlers, fan coils, and water source heat

pumps do not require any special hardware 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 dampers. Round dampers are

available in 6, 8, 10, 12, 14, and 16-in. sizes. Rectangular

dampers are available in 8x10, 8x14, 8x18, and 8x24-in. sizes.

All damper assemblies are equipped with an integrated duct

temperature sensor.

INSTALLATION

General —

The VVT zone controller is a microprocessor-

based direct digital control (DDC) controller that can be pur-

chased or installed on variable volume and temperature (VVT)

air terminals. It can be retrofitted on units manufactured by

Carrier or other manufacturers to provide pressure dependent

VVT control.

Each zone controller has the ability to function 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 sensor.

The zone controller is connected to a wall-mounted, field-

supplied, space temperature sensor (SPT) 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

parameters, and fully 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.

Carrier’s network software can be connected to the system

at the SPT sensor if Carrier network communication wiring is

run to the SPT sensor. The network software can be used to

adjust set points, set operating parameters, and fully configure

the zone controller or any device on the system.

Zone Controller Hardware — The zone controller

consists of the following hardware:

• terminal control module

• torque-limiting integrated damper actuator

• plastic enclosure

•oneno.8x

-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

installation:

• 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

-in. sheet metal screws (to secure SAT

sensor to duct, if required)

• two no. 6-32 x

-in. screws (to mount SPT [space tem-

perature] 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 Carrier space temperature sensor.

There are three sensors available for this 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

with a full complement of zone display features that can be

used to configure and operate the Zone Controller. It has an

SPT sensor and can transmit its value to the Zone Controller.

The System Pilot communicates to the Zone Controller

through the Zone Controller’s dedicated Comm2 port or over

the main communication bus through Comm1.

OPTION BOARD — The option board (33ZCOPTBRD-01)

is required for use of auxiliary 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 function-

ing as a Linkage Coordinator for a non Carrier Network/

Linkage compatible air source.

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Carrier 33ZCVAVTRM Specifications Page 30

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