Carrier 33ZCSECTRM Dokumentacja Pobierz pdf (Strona 3)

PRODUCT DESCRIPTION

The Air Terminal Controller provides dedicated control

functions for a single air terminal and system support functions

for a network of like controllers.

Single Duct Air Terminal Zone Controller

(33ZCVAVTRM) —

The Single Duct Air Terminal Zone

Controller provides dedicated control functions for single duct

terminals with modulating heat or up to 2 stages of heat. The

zone controller is part of the Carrier ComfortID system.

The 33ZCVAVTRM Single Duct Air Terminal Zone Con-

troller provides the following features and benefits:

• capable of demand control ventilation

• provides Pressure Independent (VAV) control

• uses Proportional Integral Derivative (PID) control

• mounts directly onto VAV box damper shaft

• for terminals up to 9000 cfm or 3.4 sq. ft inlet (primary

air)

• auxiliary heating control of modulating (floating) hot

water, single or two-position hot water, single or two-

stage electric, or zone perimeter heat

• quick and easy commissioning and balancing process

• automatic self calibration of airflow transducer

• capable of stand-alone operation

• actuator preassembled to housing

• capable of demand controlled ventilation support with

field-installed IAQ (Indoor Air Quality) sensor

• easy access to airflow sensor pneumatic connections

• Carrier Comfort Network (CCN) compatible

• capable of high-speed 38.4 kilobaud communications

network operation

• 128 controller maximum system (must be located on

same CCN bus segment)

• capable of zone humidity control (dehumidification)

with field-installed humidity sensor

• Carrier Linkage System capability

• global set point and occupancy scheduling

• capable of local set point adjustment with field-installed

temperature sensor (with temperature offset)

• both controller housing and actuator are UL94-5V ple-

num rated

The zone controller is a single duct, variable air volume

(VAV) terminal control with a factory-integrated actuator. The

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 utilize reheat

or supplemental heating control. The zone controller can sup-

port two position hot water, modulating hot water, 2-stage elec-

tric, or perimeter heat.

The zone controller provides additional control features

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 Indoor Air Quality (IAQ) or rel-

ative humidity monitoring and control are also available. The

Occupied Override function supports Carrier’s Tenant Billing

if the override time is set to values of 1, 2, 3, or 4 hours (60,

120, 180, or 240 minutes).

The zone controller control assembly contains an integral

VAV actuator assembly that is field mounted to the VAV termi-

nal damper shaft, similar to the mounting of a standard actua-

tor. The actuator is rated at 35 lb.-in. (3.95 N-m) torque, a

90-degree stroke, and provides a 90-second nominal time at

60 Hz. The actuator is suitable for mounting onto a

-in.

(9.5 mm) square or round damper shaft, or onto a

-in.

(13 mm) round damper shaft. The minimum damper shaft

length is 1

-in. (45 mm). The zone controller is designed for

vertical or horizontal mounting.

The zone controller is provided with removable connectors

for power and communications. The zone controller has non-

removable screw type connectors for inputs. The removable

connectors are designed so that they can be inserted one way so

as to prevent installation errors. The zone controller also pro-

vides an RJ-11 modular phone jack for the Network Service

tool connection to the module via the Carrier Comfort Network

(CCN) communications.

An optional Conduit Box Cover (Part Number

33ZCCONBOX) allows field wiring connection via conduit.

The conduit box is designed to accept two

-in. (13 mm)

EMT conduits.

The 33ZCVAVTRM is designed to allow a service person

or building owner to configure and operate the unit through the

CCN user interfaces. A user interface is not required for day-

to-day operation. All maintenance, configuration, setup, and

diagnostic information is available through the Level II com-

munications port to allow data access by an attached computer

running Network Service Tool, ComfortVIEW

™

, or Comfort-

WORKS

software.

WIRING CONNECTIONS — Field wiring is 18 to 22 AWG

(American Wire Gage). The zone controller is a NEC (National

Electrical Code) Class 2 rated device.

INPUTS

• space temperature sensor

• primary air damper position (factory-installed)

• airflow sensor (factory installed)

• remote wall sensor set point adjustment

• optional supply temperature sensor (required for ducted

heat)

• optional primary air temperature sensor (required for

systems which do not utilize a linkage compatible air

source system)

• optional IAQ sensor or relative humidity sensor

• optional remote occupancy contact

OUTPUTS

• internally factory-wired damper actuator

• heating (ducted or non-ducted)

— modulating (floating) heat

— up to 2 stages of electric heat (if 3 stages are required,

the 33ZCFANTRM should be used)

— two position heat

POWER SUPPLY

The 33ZCVAVTRM zone controller requires a 24 VAC ±

10% at 40 VA (50/60 Hz) power source.

POWER CONSUMPTION — The power requirement siz-

ing allows for accessory water valves or heat contactors. Water

valves are limited to 15 VA on both two-position and modulat-

ing hot water. The heat contactors are limited to 10 VA (hold-

ing) each.

ACCURACY — Terminal airflow (nominal cfm) is rated at

1-in. wg (249 kPa) measured velocity pressure. The zone con-

troller is capable of controlling to as low as 10% or as high as

125% of nominal airflow with an accuracy of ± 3% (nominal)

at any point within the range.

HARDWARE (MEMORY)

FLASH EPROM

DIFFERENTIAL PRESSURE RANGE

0 to 2.0 in. wg (0 to 498 kPa) maximum for the onboard

flow sensor.

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