Carrier 33ZCVAVTRM Specifications download pdf (Page 5)

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PC 111 Catalog No. 533-30012 Printed in U.S.A. Form 33ZC-14SI Pg 1 10-04 Replaces: New

Book 1 4

Tab 1 1 a 1 3 a

Installation, Start-Up and

Configuration Instructions

Part Number 33ZCBC-01

CONTENTS

Page

SAFETY CONSIDERATIONS ............................1

GENERAL ............................................. 1

INSTALLATION ..................................... 1-11

General ................................................ 1

Bypass Controller Hardware ........................... 2

Field-Supplied Hardware............................... 2

• DUCT TEMPERATURE (DAT) SENSOR

Mount Bypass Controller .............................. 2

• LOCATION

• MOUNTING

Connect the Power Transformer ........................2

Bypass Controller Inputs and Outputs................. 5

Install Duct Temperature Sensor....................... 5

Install Pressure Tubing ................................ 5

Install Field-Supplied Actuators ........................6

• FLOATING POINT HIGH-TORQUE ACTUATORS

• LINKED ACTUATORS

Damper Stops .......................................6

Connect the Carrier Network Communication Bus ..... 6

• COMMUNICATION BUS WIRE SPECIFICATIONS

• CONNECTION TO THE COMMUNICATION BUS

START-UP............................................. 12

Perform System Checkout ............................ 12

CONFIGURATION .................................. 12-17

Status Display Table .................................. 12

Maintenance Tables................................... 13

• BYPASS CONTROLLER MAINTENANCE TABLE

• BYPASS CONTROLLER COMMISSIONING

MAINTENANCE TABLE

• BYPASS CONTROLLER SYSTEM PILOT DEFAULT

MAINTENANCE TABLE

Configuration Tables ................................. 15

• ALARM CONFIGURATION TABLE

• BYPASS CONTROLLER CONFIGURATION TABLE

• SYSTEM PRESSURE SET POINT CONFIGURATION

TABLE

• DUCT SENSOR CONFIGURATION TABLE

• DEVICE CONFIGURATION TABLE

• LANGUAGE CONFIGURATION TABLE

OPERATION .....................................18-20

System Pressure Operation ........................18

Bypass Controller Calibration ......................18

SAFETY CONSIDERATIONS

GENERAL

The 3V control system VVT bypass controller (33ZCBC-01)

is a system static pressure controller that operates to maintain the

desired system duct pressure based on the system pressure set

point. The VVT bypass controller is used with a system of VVT

zone controllers. Zone controllers maintain precise temperature

control in the space by regulating the flow of conditioned air into

the space and operating an optional terminal fan.

As part of the 3V control system, the bypass controller is

designed to communicate using a Carrier protocol with a

Linkage Coordinator zone controller. One Linkage Coordina-

tor zone controller can coordinate up to 31 additional zone

controllers. The purpose of the Linkage Coordinator/zone

relationship is to provide an efficient data path for communica-

tion between the zone controllers, bypass controller, and

associated Carrier network air source. This arrangement makes

up the 3V control system.

A user interface is not required for everyday operation of

the bypass controller. A service person or building owner can

configure or operate the bypass controller through a Carrier

network user interface such as the System Pilot or Carrier

software.

INSTALLATION

General —

The bypass controller is used to control the

bypass damper actuator in the 3V control system. The purpose

of the bypass damper is to account for fluctuations in the sup-

ply air pressure caused by the zone dampers modulating to sat-

isfy individual set points. The bypass system allows a constant

volume HVAC (heating, ventilation and air conditioning) unit

to supply variable volumes of air to the building. The system

bypasses air from the supply side to the return side of the unit.

Determining the proper size for the bypass damper is criti-

cal for the operation of the VVT (variable volume/variable

temperature) system. If the damper selected is too large, it may

have to modulate more than necessary to react to system pres-

sure changes. The ability of the system to stay within a pressure

range is compromised. When the damper is undersized, the

capability of the damper to control the pressure may be com-

promised due to the inability to bypass enough air volume. An

undersized damper also creates higher airflow velocities which

add to the noise generated by the system.

SAFETY NOTE

Air-conditioning equipment will provide safe and reli-

able service when operated within design specifications.

The equipment should be operated and serviced only by

authorized personnel who have a thorough knowledge

of system operation, safety devices and emergency

procedures.

Good judgement should be used in applying any manu-

facturer’s instructions to avoid injury to personnel or dam-

age to equipment and property.

Disconnect all power to the unit before performing mainte-

nance or service. Unit may automatically start if power is

not disconnected. Electrical shock and personal injury

could result.

3V™ Control System

VVT® Bypass Controller

33ZC

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Carrier 33ZCVAVTRM Specifications Page 5

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