Carrier 33ZCVAVTRM Specifications download pdf (Page 128)

GENERAL

The PremierLink™ controller, version 2.0, is a field retrofit

rooftop control compatible with the Carrier Comfort Net-

work® (CCN) system. This control is designed to allow users

the access and ability to change factory-defined settings, thus

expanding the function of the standard unit control board. The

complete PremierLink package (part number 33CSPREMLK)

consists of a rooftop control circuit board with plastic cover

and label, wire harnesses, spade connectors, wire nuts and 4

mounting screws.

Access is available via an RJ-11 connection or a 3-wire con-

nection to the communication bus. User interfaces available for

use with the CCN system are PCs equipped with Carrier user

interface software such as Service Tool, ComfortVIEW™, or

ComfortWORKS® software. When used as part of the CCN

system, other devices such as the CCN data transfer, System

Pilot™, Touch Pilot™, or Comfort Controller can read data

from or write data to the PremierLink retrofit controller.

INSTALLATION

Inspection —

Inspect package contents for visual defects

that may have occurred during shipping. If there is any dam-

age, contact your local representative before proceeding.

PremierLink Controller Hardware — The Premier-

Link package consists of the following hardware:

• control module (with plastic cover and label)

• 7 wire harnesses

• 10 spade connectors

• wire nuts

• 4 no. 6x1-in. self-drilling Phillips pan head mounting

screws

Field-Supplied Hardware — The PremierLink con-

troller is configurable with the following field-supplied

sensors:

• space temperature sensor (33ZCT55SPT, 33ZCT56SPT,

33ZCT58SPT, or 33ZCT59SPT) in sensor mode or thermo-

stat mode for economizer control

• supply air temperature sensor (33ZCSENSAT) required for

all applications

• indoor air quality sensor (33ZCSENCO2, 33ZCT55CO2,

33ZCT56CO2) required only for demand control

ventilation. A dedicated 24-vac transformer is required.

• outdoor air quality sensor (33ZCTSENCO2) required only

for demand control ventilation

• outdoor air temperature sensor (33ZCSENOAT)

• outdoor air enthalpy switch (33CSENTHSW)

• filter switch (third party differential airflow)

• return air enthalpy sensor (33CSENTSEN)

• indoor relative humidity sensor (33ZCSENSRH-01),

required only for dehumidification

For specific details about sensors, refer to the literature

supplied with the sensor.

SPACE TEMPERATURE (SPT) SENSOR — A field-supplied

Carrier space temperature sensor is required to maintain space

temperature in sensor mode. There are four sensors available for

this application:

• 33ZCT55SPT, space temperature sensor with override

button

• 33ZCT56SPT, space temperature sensor with override

button and set point adjustment

• 33ZCT58SPT, T58 communicating room sensor with over-

ride button, set point adjustment, and manual fan control

• 33ZCT59SPT, space temperature sensor with LCD (liquid

crystal display) screen, override button, and set point

adjustment

If controlling an economizer in the thermostat mode, a duct

sensor must be mounted in the return air duct and wired to SPT

input.

SUPPLY AIR TEMPERATURE (SAT) SENSOR — The

PremierLink controller must be connected to a field-supplied

supply air temperature (SAT) sensor (part number

33ZCSENSAT) to monitor the temperature of the air delivered.

The SAT consists of a thermistor encased within a stainless

steel probe. The probe is 6 in. nominal length. The SAT sensor

has 114 in. of unshielded, plenum-rated cable (2 conductors,

22 AWG [American Wire Gage]). The sensor range is –40 to

185 F with a nominal resistance of 10,000 ohms at 77 F. The

sensor measures temperature with an accuracy of ±0.36 F.

Ideally, the SAT sensor should be located inside the unit

under the heat exchanger. The SAT sensor can also be installed

in the supply air duct downstream from unit heat source to

control.

INDOOR AIR QUALITY CO

SENSOR — An indoor air

quality sensor is required for CO

level monitoring. Three

different CO

sensors are available for this application:

• 33ZCSENCO2 sensor is an indoor, wall-mounted sensor

with an LCD (liquid-crystal display) screen

• 33ZCT55CO2 sensor is an indoor, wall-mounted sensor

without display. The CO

sensor also includes a space tem-

perature sensor with override button

• 33ZCT56CO2 sensor is an indoor, wall-mounted sensor

without display. The CO

sensor also includes a space tem-

perature sensor with override button and temperature offset

OUTDOOR AIR QUALITY CO

SENSOR — The

outdoor air CO

sensor (33ZCSENCO2) is designed to moni-

tor carbon dioxide (CO

) levels found in diesel exhaust and

control ventilation systems. It comes with an outdoor enclo-

sure. This sensor provides an outdoor baseline for differential

DCV (Demand Control Ventilation) control.

NOTE: The relative humidity sensor and the outdoor air CO

sensor cannot both be used on the controller at the same time.

RELATIVE HUMIDITY SENSOR — The 33ZCSENSRH-

01 relative space humidity sensor is required for dehumidifica-

tion control on a rooftop unit equipped with a dehumidification

device. Otherwise, the relative humidity sensor is used for

monitoring only.

NOTE: The relative humidity sensor and the outdoor air CO

sensor cannot both be used on the controller at the same time.

OUTDOOR AIR TEMPERATURE SENSOR — The

outdoor air temperature sensor (33ZCSENOAT) monitors the

temperature of the outside air. If the sensor is to be installed in

the outdoor air duct instead of an outdoor location, sensor

33ZCSENPAT should be used.

OUTDOOR AIR ENTHALPY SWITCH/RECEIVER

(33CSENTHSW) — This device measures both temperature

and humidity and converts the data into a relay output depen-

dent on the sensor mode. Mode 1 is designed to energize the

relay at a fixed set point of 28 Btu/lb or 75 F. Mode 2 is used in

conjunction with the Return Air Enthalpy Sensor

(33CSENTSEN) to measure both indoor and outdoor enthalpy

and to determine which is greater. The enthalpy switch output

can be normally open or normally closed.

FILTER SWITCH — A field-supplied third-party differential

air flow switch with normally open contacts is requried for de-

tection of dirty filters. The switch must be rated for a minimum

of 5 va at 24 vac.

IMPORTANT: PremierLink part number 33CSPREMLK

should only be used in applications where the integrity

of the Underwriters Laboratories rating will be

maintained.

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Carrier 33ZCVAVTRM Specifications Page 128

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