Carrier VVT Zone II, VVT Zone Installation And Startup Manual

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Document revision history

Verify that you have the most current version of this document from

office.

Important changes are listed in

at the end of this document.

or your local Carrier

Introduction .................................................................................................................................................................. 1

Installing the VVT Zone II............................................................................................................................................. 6

Start-up ....................................................................................................................................................................... 40

Contents

What is a VVT Zone II? ......................................................................................................................................... 1

Specifications ........................................................................................................................................................ 3

Safety Considerations .......................................................................................................................................... 5

Field-supplied hardware ...................................................................................................................................... 5

Mounting the VVT Zone II ..................................................................................................................................... 6

To mount the controller and actuator .................................................................................................. 6

Wiring the VVT Zone II for power ..................................................................................................................... 10

To wire the controller for power .......................................................................................................... 11

Addressing the VVT Zone II ............................................................................................................................... 12

Wiring for communications .............................................................................................................................. 12

Wiring specifications for BACnet MS/TP and ARC156 ...................................................................... 12

To wire the controller to the BACnet network .................................................................................... 13

Wiring devices to the VVT Zone II's Rnet port ............................................................................................... 13

Wiring specifications ........................................................................................................................... 14

To wire ZS sensors to the controller ................................................................................................... 14

To wire the Wireless Adapter for wireless sensors ............................................................................ 15

To wire an Equipment Touch to the VVT Zone II ................................................................................ 17

To wire the TruVu™ ET Display ........................................................................................................... 18

Wiring sensors to the VVT Zone II's inputs ..................................................................................................... 19

Wiring specifications ........................................................................................................................... 19

To wire the T55 sensor to the controller ............................................................................................ 20

To wire the Supply Air Temperature sensor to the controller ........................................................... 20

To wire a Duct Air Sensor to the controller ........................................................................................ 21

To wire the CO2 sensor to the controller ........................................................................................... 21

To wire the Relative Humidity sensor to the controller ..................................................................... 23

Wiring a remote occupancy sensor .................................................................................................... 24

Wiring equipment to outputs ........................................................................................................................... 25

Wiring specifications ........................................................................................................................... 25

Wiring diagram legend ........................................................................................................................ 26

Single duct only ................................................................................................................................... 26

Single duct 2-position hot water ......................................................................................................... 27

Single duct modulating hot water ...................................................................................................... 28

Single duct SCR electric heat ............................................................................................................. 29

Single duct combination base board and ducted heat ..................................................................... 30

Single duct staged electric heat ......................................................................................................... 31

Fan box 2-position hot water .............................................................................................................. 32

Fan box modulating hot water - ducted or baseboard ...................................................................... 33

Fan box SCR electric heat ................................................................................................................... 34

Fan box combination baseboard and ducted heat ........................................................................... 35

Fan box 2-stage electric heat ............................................................................................................. 36

Wiring field-supplied actuators to the analog output ........................................................................ 37

Configuring the VVT Zone II's properties ........................................................................................................ 40

Configuring ZS Sensors ..................................................................................................................................... 41

Performing system checkout ........................................................................................................................... 41

Commissioning the VVT Zone II ....................................................................................................................... 42

Balancing the system ........................................................................................................................................ 42

Step 1: Prepare for balancing ............................................................................................................ 43

Step 2: Balance each zone ................................................................................................................ 43

Step 3: Set the system static pressure ............................................................................................. 44

Contents

Sequence of operation .............................................................................................................................................. 46

To adjust the driver properties.................................................................................................................................. 56

Troubleshooting ......................................................................................................................................................... 61

Compliance ................................................................................................................................................................ 64

Appendix A: VVT Zone II Points/Properties ............................................................................................................ 65

Appendix B: VVT terminal modes ............................................................................................................................ 92

Appendix C: ZS Sensor display for VVT Zone II ....................................................................................................... 94

Appendix D: BACnet points list ................................................................................................................................ 95

Document revision history ........................................................................................................................................ 98

Temperature sensors ........................................................................................................................................ 46

Zone airflow control ........................................................................................................................................... 47

Zone reheat control ........................................................................................................................................... 48

Demand control ventilation (DCV) and dehumidification using optional sensors ................................... 49

Occupancy ........................................................................................................................................................... 50

Alarms ................................................................................................................................................................. 51

Demand limiting ................................................................................................................................................ 52

Linkage ................................................................................................................................................................ 52

Linkage modes and operation ......................................................................................................................... 54

Driver ................................................................................................................................................................... 56

Device .................................................................................................................................................................. 57

Notification Classes ........................................................................................................................................... 58

Calendars ............................................................................................................................................................ 59

Common Alarms ................................................................................................................................................ 59

Specific Events ................................................................................................................................................... 60

Switches, Jumpers, Options ............................................................................................................................. 60

Act Net Network Details ................................................................................................................................... 60

LED's .................................................................................................................................................................... 61

To get the serial number .................................................................................................................................. 62

To restore factory defaults ............................................................................................................................... 63

To replace the battery ....................................................................................................................................... 63

FCC Compliance ................................................................................................................................................. 64

CE Compliance ................................................................................................................................................... 64

BACnet Compliance........................................................................................................................................... 64

Status................................................................................................................................................................... 65

Unit Configuration .............................................................................................................................................. 66

Setpoints ............................................................................................................................................................. 68

Alarm Configuration .......................................................................................................................................... 75

Service Configuration ........................................................................................................................................ 77

Maintenance ....................................................................................................................................................... 83

Alarms ................................................................................................................................................................. 86

Linkage ................................................................................................................................................................ 87

I/O Points ............................................................................................................................................................ 89

What is a VVT Zone II?

NOTE

Introduction

The VVT Zone II (#OPN-VVTZC-02), a component of the i-Vu® Control System, controls zone temperature in single duct, fan powered, Variable Volume and Temperature (VVT

The VVT Zone II is available in both English or Metric units. The metric version has (-M) appended to the

part number. Everything in this document applies to both versions.

The VVT Zone II with actuator maintains zone temperature 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 the air source heating and cooling sources or supplemental heat. The VVT Zone II provides dedicated control functions for single duct and fan box terminals with modulating heat, up to 3 stages of ducted heat, or combination baseboard and ducted heat.

The i-Vu Control System uses linkage to exchange data between the zone terminals and their air source to form a coordinated HVAC system. The system's air source controller, zone controllers, and bypass controller are linked so that their data exchange can be managed by one zone controller configured as the VVT Master.

You can disconnect the actuator from the controller and mount them separately, connecting them with just the actuator cable or using an additional extension cable, up to a maximum distance of 300 feet.

The following illustration shows the VVT Zone II in a typical i-Vu® Control System.

) applications.

Introduction

NOTE

This document gives instructions for field-installation of a VVT Zone II in an i-Vu® Control System. However, VVT Zone IIs are available factory-mounted to Carrier’s round and rectangular dampers. Damper assemblies have an integrated duct temperature sensor.

Introduction

Specifications

NOTE

Driver drv_vvtopn02

Power 24 Vac ±10%, 50–60 Hz

14 VA power consumption 26 Vdc (25 V min, 28.8 V max) Single Class 2 source only, 100 VA or less

Actuator Belimo brushless DC motor, torque 45 inch-pounds (5 Nm), runtime 154 seconds

Act Net port To connect the actuator cable and the VVT Zone II

BACnet port

Rnet port

Local Access port For system start-up and troubleshooting using Field Assistant

For communication with the controller network using BACnet ARC156 (156 kbps) or BACnet MS/TP (9600 bps – 76.8 kbps)

• Supports up to 5 wireless and/or ZS sensors, and one Equipment Touch or TruVu™ ET Display.

• Supplies 12 Vdc/200 mA power to the Rnet at an ambient temperature of 77°F (25°C) with a 24 Vac nominal power source. NOTE Ambient temperature and power source fluctuations may reduce the power supplied by the Rnet port.

If the total power required by the sensors on the Rnet exceeds the power supplied by the Rnet port, use an external power source. The Wireless Adapter, Equipment Touch, or TruVu™ ET Display must be powered by an external power source. See the specifications in each device's Installation and Start-up Guide to determine the power required.

Thermistor inputs Accepts Precon type II thermistors (10kOhm at 77°F [25°C])

Range: -50°F (-45.5°C) to 250°F (121.1°C)

Dry contact inputs A 3.3 Vdc wetting voltage used to detect the contact position, resulting in a 0.3

mA maximum sense current when the contacts are closed.

Voltage inputs 0-5 Vdc. Input impedance is approximately 30 kOhms

Input resolution 10 bit A/D

Binary outputs 3 binary outputs, relay contact rated at 1 A max. @ 24 Vac/Vdc. Configured

normally open.

Analog output 1 analog output, 0–10 Vdc (5 mA max).

The controlled device must have a minimum of 2000 Ohms resistance measured from its input to ground and must share the same ground as the controller.

Output resolution 8 bit D/A

Battery 10-year Lithium CR2032 battery retains the following data for a maximum of

10,000 hours during power outages: control programs, editable properties, schedules, and trends.

Introduction

CAUTION

Protection Built-in surge and transient protection for power and communications in

compliance with EN61000-6-1.

Incoming power and network connections are protected by non-replaceable internal solid-state polyswitches that reset themselves when the condition that causes a fault returns to normal.

The power, network, input, and output connections are also protected against transient excess voltage/surge events lasting no more than 10 msec.

To protect against large electrical surges on serial EIA-485

networks, place a PROT485 at each place wire enters or exits the building.

BT485 connector You attach a BT485 (not included) to a controller at the beginning and end of a

network segment to add bias and to terminate a network segment.

Status indicators LEDs indicate status of communications, running, errors, power, and digital

outputs

Environmental operating

32 to 130°F (0 to 54.4°C), 10–90% relative humidity, non-condensing

range

Storage temperature range -24 to 140°F (-30 to 60°C), 0 to 90% relative humidity, non-condensing

Physical UL94-5VA plenum rated enclosure for installation in plenum (or other space for

environmental air) in accordance with NEC Section 300.22 (c) and (d)

Controller and actuator overall dimensions

Controller and actuator mounting dimensions

Controller overall dimensions

Controller mounting dimensions

Actuator overall dimensions Width:

Actuator mounting

Width: Height:

8.9 in. (22.7 cm)

5.9 in. (15.0 cm)

7.1 in. (18.0 cm) from left side controller mounting hole centerline to actuator mounting hole centerline

Width: Height: Depth:

6.4 in. (16.3 cm)

5.7 in. (14.5 cm)

2.1 in. (5.3 cm)

5.3 in. (13.4 cm) from left side controller mounting hole centerline to right side controller mounting hole centerline

3.0 in. (7.6 cm) Height: Depth:

5.9 in. (15.0 cm)

2.5 in. (6.4 cm)

4.4 in. (11.2 cm) from shaft centerline to actuator mounting hole centerline

dimensions

Panel depth 2.5 in. (6.4 cm) minimum

Shaft dimensions Minimum shaft diameter: .25 in. (.64 cm)

Maximum shaft diameter: .63 in. (1.59 cm) Minimum shaft length: 1.75 in. (4.45 cm)

Weight 1.8 lbs (0.82 kg)

BACnet support Conforms to the BACnet Advanced Application Controller (B-AAC) Standard Device

Profile as defined in ANSI/ASHRAE Standard 135-2012 (BACnet) Annex L, Protocol Revision 9

Listed by UL-916 (PAZX), cUL-916 (PAZX7), FCC Part 15-Subpart B, Class B, CE

Introduction

Safety Considerations

CAUTION

WARNING Electrical Shock Hazard

WARNING

Field-supplied hardware

Air conditioning equipment will provide safe and reliable 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 judgment should be used in applying any manufacturer's instructions to avoid injury to personnel or damage to equipment and property.

Failure to follow this warning could cause personal injury, death, and/or equipment damage.

Disconnect all power to the unit before performing maintenance or service. Unit may automatically start if power is not disconnected.

materials such as mercury contactors.

Follow all local, state, and federal laws regarding disposal of equipment containing hazardous

Each zone controller installation requires the following field-supplied components:

• zone terminal unit

• round or rectangular mounting bracket

• space temperature sensor

• supply air temperature sensor

• 2x4 in. standard single gang electrical box

• transformer — 24 Vac, 40 VA

• two no. 10 x 1/2-in. sheet metal screws (to secure SAT sensor to duct)

• two no. 6-32 x 5/8-in. screws (to mount space temperature sensor base to electrical box)

• wiring

• bushings (required when mounting SAT sensor in a duct 6-in. (15.2 cm) or less in diameter)

Optional:

• contractors (if required for fan or electric heat)

• indoor air quality sensor

• relative humidity sensor

• 2 screws and 2 hollow wall anchors (to mount relative humidity sensor directly to wall)

• valve and actuator for hot water heat (if required)

Installing the VVT Zone II

Mounting the VVT Zone II

To mount the controller and actuator

Installing the VVT Zone II

To install the VVT Zone II:

1 Mount the controller to the VVT box. (page 6)

2 Wire the controller for power. (page 10)

3 Set the controller's address. (page 12)

4 Wire the controller to the BACnet MS/TP or BACnet ARC156 network. (page 12)

5 Wire devices to the Rnet port. (page 13)

6 Wire sensor(s) to the controller. (page 19)

7 Wire equipment to the controller's outputs. (page 25)

To disconnect and mount the controller and actuator separately

Installing the VVT Zone II

Act Net

Adding an extension cable

Act Net

Disconnect the actuator from the controller by inserting a screw driver in the slot on the back of the VVT Zone II and pressing the tab. The actuator cable or an attached extension cable must connect to the controller's port.

If you need to mount the actuator more than 14 in. from the controller, you can use an 18 AWG wire for an extension cable. The maximum distance that the actuator and controller can be separated is 300 feet (91.4 m). Connect the extension cable to the end of the actuator cable. You can use connectors or splice the wires. Terminate the extension cable in the

1 Turn the damper shaft to fully close the damper.

2 Mount the controller to the VVT terminal by sliding the clamp assembly onto the damper shaft.

port on the controller.

Installing the VVT Zone II

NOTE

O-ring Bushing

Anti-rotation slot

NOTES

For service access, allow at least 1 foot (.3 m) of clearance between the front of the controller and

adjacent surfaces.

3 Secure the controller and the actuator by installing the screws, anti-rotation slot's bushings, and o-rings that

are supplied with the VVT Zone II.

○ Center the bushing in the slot. Failure to do so may cause the actuator to stick or bind.

○ The VVT Zone II must be secured, but loose enough to allow movement. of the damper shaft.

Installing the VVT Zone II

CAUTIONS

must

○ You

○ Overtightening the screws so that the controller and actuator cannot move may damage the unit.

use the screws, anti-rotation slot's bushings, and o-rings that are shipped with the VVT Zone II.

4 Hold down the actuator damper release button and rotate the actuator clamp in the same direction that

closed the damper. Rotate the clamp until it stops, then rotate it back one notch.

5 Release the button.

6 Tighten the actuator clamp to the damper shaft by tightening the two M5 nuts.

Installing the VVT Zone II

Wiring the VVT Zone II for power

WARNING

CAUTIONS

7 Hold down the actuator damper release button and rotate the damper from fully closed to fully open. If the

damper traveled less than 90 degrees, do the following to set the actuator's fully open position:

a) Loosen the appropriate stop clamp screw. See figure below.

b) Move the stop clamp until it contacts the

edge of the actuator cam.

c) Tighten the screw.

8 Hold down the actuator damper release button, rotate the damper to verify that it fully opens and closes, then

release the button.

• The VVT Zone II is powered by a Class 2 power source. Take appropriate isolation measures when mounting it in a control panel where non-Class 2 circuits are present.

• Carrier controllers can share a power supply as long as you:

• Maintain the same polarity.

• Use the power supply only for Carrier controllers.

Do not apply line voltage (mains voltage) to the controller's ports and terminals.

Installing the VVT Zone II

To wire the controller for power

Gnd

24 Vac

Gnd

Power

Run

1 To access the screw terminal connectors, lift up the controller's cover by pulling the tabs located on both

sides of the controller's left mounting bracket.

2 Remove power from the power supply.

3 Pull the screw terminal connector from the controller's power terminals labeled

and

4 Connect the transformer wires to the screw terminal connector.

5 Apply power to the power supply.

6 Measure the voltage at the VVT Zone II’s power input terminals to verify that the voltage is within the

operating range of 21.6–26.4 Vac.

7 Connect a 4-inch (10.2 cm) wire from

to the control panel.

8 Insert the screw terminal connector into the VVT Zone II's power terminals.

9 Verify that the

LED is on and the

LED is blinking.

Installing the VVT Zone II

Addressing the VVT Zone II

Gnd

24 Vac

Tens (10's

Ones (1's

EXAMPLE

Tens (10's

Ones (1's

10's 1's

CAUTION

Wiring for communications

NOTE

Wiring specifications for BACnet MS/TP and ARC156

WARNING

You must give the VVT Zone II an address that is unique on the network. You can address the VVT Zone II before or after you wire it for power.

1 If the VVT Zone II has been wired for power, pull the screw terminal connector from the controller's power

terminals labeled

2 Using the rotary switches, set the controller's address. Set the

address, and set the

the

If the controller’s address is 25, point the arrow on the

and

) switch to 5.

. The controller reads the address each time you apply power to it.

) switch to the tens digit of the

) switch to the ones digit.

) switch to 2 and the arrow on

The factory default setting is 00 and must be changed to successfully install your VVT Zone II.

The VVT Zone II communicates using BACnet on the following types of network segments:

• MS/TP communicating at 9600 bps, 19.2 kbps, 38.4 kbps, or 76.8 kbps

• ARC156 communicating at 156 kbps

For more networking details, see the Open Controller Network Wiring Installation Guide.

Cable: 22 AWG or 24 AWG, low-capacitance, twisted, stranded, shielded copper wire

Maximum length: 2000 feet (610 meters)

Do not apply line voltage (mains voltage) to the controller's ports and terminals.

Installing the VVT Zone II

To wire the controller to the BACnet network

WARNING

Act Net

Gnd

24 Vac

Net +, Net -

Shield

NOTE

For...

Set BACnet ARC156 or MS/TP jumper to...

Set DIP switches 1 and 2 to...

ARC156

MS/TP

MS/TP Baud

NOTE

Wiring devices to the VVT Zone II's Rnet port

CAUTION Rnet power

terminating resistors on that network.

1 Pull the screw terminal connector from the controller's power terminals labeled

2 Check the communications wiring for shorts and grounds.

3 Connect the communications wiring to the controller’s screw terminals labeled

4 Set the communication type and baud rate.

Attaching any ARCNET or MS/TP network to the

Use the same polarity throughout the network segment.

port damages BT485s, DIAG485s, or

and

, and

ARC156

N/A. Baud rate will be 156 kbps regardless of the

DIP switch settings.

MS/TP

The appropriate baud rate. See the

diagram on the controller.

Use the same baud rate for all controllers on the network segment.

5 If the VVT Zone II is at either end of a network segment, connect a BT485 to the VVT Zone II.

6 Insert the power screw terminal connector into the VVT Zone II's power terminals.

7 Verify communication with the network by viewing a Module Status report in the i-Vu® interface.

The Rnet communicates at a rate of 115 kbps and should be wired in a daisy-chain or hybrid configuration.

Supports up to

• 5 wireless and/or ZS sensors

• One Equipment Touch

• One TruVu™ ET Display

For more detailed instructions, see the device's Installation Guide.

The Rnet port provides 12 Vdc/200 mA* maximum at 32°F (25°C). that can be used to power zone sensors. If the total power required by the sensors on the Rnet exceeds the power supplied by the port, use an external power supply. See the sensor's Installation and Start-up Guide to determine the power required.

* These numbers will be reduced at higher temperatures.

Installing the VVT Zone II

Wiring specifications

To wire ZS sensors to the controller

NOTE

Outer Jack

Inner insulation

.25 in. (.6 cm)

NOTE

Connect this wire...

To this terminal...

Cable from sensor to controller: If <100 ft (30.5 meters) 22 AWG, unshielded

If >100 ft (30.5 meters) 22 AWG, shielded

Maximum length: 500 feet (152 meters)

ZS Sensors are thermistor-based temperature sensors that may optionally sense humidity, CO2, or VOC. ZS Sensors are wired to the Rnet port on i-Vu® Open controllers.

You can use the following ZS sensors:

• ZS Standard

• ZS Plus

• ZS Pro

The ZS CO2 model uses 190 mA during sample period. Use auxiliary 12 Vdc, unless it is the only device on

the Rnet port.

1 Remove power from the VVT Zone II.

2 Partially cut, then bend and pull off the outer jacket of the Rnet cable(s). Do not nick the inner insulation.

Strip about .25 inch (.6 cm) of the inner insulation from each wire.

3 Wire each terminal on the sensor to the same terminal on the controller. See diagram below.

Carrier recommends that you use the following Rnet wiring scheme:

Red

Black

White

Green

+12V

Rnet-

Rnet+

Gnd

4 Apply power to the VVT Zone II.

Installing the VVT Zone II

To wire the Wireless Adapter for wireless sensors

WARNING

REQUIREMENTS

NOTES

Inner insulation

Outer jacket

Foil shield

.25 in. (.6 cm)

Shield wire

The Carrier wireless sensors are available in 868, 902, and 928 MHz radio frequency. The sensors are thermistorbased temperature sensors that may optionally sense humidity.

Wireless sensors communicate through a Wireless Adapter, which is wired to the Rnet port of the controller.

• A v6.5 or later i-Vu® system

• v6-xx-xxx or later controller drivers

To configure the control program for the desired user interaction with the sensor, see the Wireless Sensors Application Guide. For detailed instructions, see the Wireless Sensors Installation Guide.

To wire, power, and mount the Wireless Adapter

• The Wireless Adapter requires a 24 Vac power supply. It is not powered by the Rnet.

Do not apply line voltage (mains voltage) to the Wireless Adapter.

• If the Wireless Adapter will be:

○ Daisy-chained on the Rnet with ZS sensors, an Equipment Touch, or TruVu™ ET Displayuse the standard

4-conductor Rnet wiring.

○ The only device on the Rnet, you can use a 3-conductor cable instead of the standard 4-conductor Rnet

cable.

1 Turn off the power to the controller that the Wireless Adapter will be wired to.

2 Partially cut, then bend and pull off the outer jacket of the Rnet cable(s). Do not nick the inner insulation.

3 Strip about 0.25 inch (0.6 cm) of the inner insulation from each wire.

Installing the VVT Zone II

Rnet +, Rnet -

Gnd

Rnet

NOTE

Gnd

LED

If the LED is...

Then the device...

device.

4 Wire the

, and

terminals on the controller's

port to the terminals of the same name on

the Wireless Adapter's Rnet connector.

If using shielded wire, connect the shield wire and the ground wire to the

terminal.

5 Wire the 24 Vac external power supply to the Wireless Adapter's power connector.

6 Mount the Wireless Adapter by inserting 2 screws through the mounting tabs on each end of the Wireless

Adapter.

7 Apply power to the external power supply.

8 Verify that the LED on top of the Wireless Adapter is blinking. See "LED" below.

9 Turn on the controller's power.

The blue LED on the top of the Wireless Adapter indicates the following:

Off Is not powered or there is a problem.

Blinking Is working properly.

Steadily on Has a problem. Do one of the following:

• Cycle power to the device.

• Insert a small screwdriver or paper clip into the hole next to the LED to reboot the

Installing the VVT Zone II

To wire an Equipment Touch to the VVT Zone II

NOTES

CAUTION

off

Rnet+

Rnet-

NOTE

Gnd

• The Equipment Touch requires a 24 Vac power supply. It is not powered by the Rnet.

• If the Equipment Touch will be:

○ Daisy-chained on the Rnet with ZS sensors or a Wireless Adapter, use the standard 4-conductor Rnet

wiring and follow the wiring instructions To wire ZS sensors to the VVT Zone II (page 14).

○ The only device on the Rnet, you can use a 2-conductor cable instead of the standard 4-conductor Rnet

cable and follow the instructions below.

• For complete Equipment Touch installation instructions including wiring diagrams, see the Equipment Touch Installation and Setup Guide.

• The power supply is AC power.

• You maintain the same polarity.

• You use the power source only for Carrier controllers.

1 Turn

2 Partially cut, then bend and pull off the outer jacket of the cable. Do not nick the inner insulation.

The VVT Zone II can share a power supply with the Carrier controller as long as:

the VVT Zone II's power.

3 Strip about 0.25 inch (0.6 cm) of the inner insulation from each wire.

4 Wire the VVT Zone II's

and

terminals to the terminals of the same name on the Equipment

Touch's connector.

If using shielded wire, connect the shield wire and the ground wire to the

terminal.

5 Turn on the VVT Zone II's power.

6 Turn on the Equipment Touch.

Installing the VVT Zone II

To wire the TruVu™ ET Display

WARNING

24V DC

CAUTION

RS485

Rnet

Gnd

Gnd, +

Rnet +, -

Rnet -

Wiring power

Do not apply line voltage (main) - 24 Vdc power only.

Wire the TruVu™ ET Display Maximum distance 100 feet (30 meters).

• The power supply is DC power.

• You maintain the same polarity.

• You use the power source only for Carrier controllers.

The TruVu™ ET Display can share a power supply with the Carrier controller as long as:

connector to the 24 Vdc power supply using 2-conductor 18 AWG wire.

Wiring communication

1 Turn off the VVT Zone II's power.

2 Wire the TruVu™ ET Display's

using 2-conductor 22 AWG wire with a maximum distance of 500 feet (152 meters).

connector to the <ALCProduct>'s

port,

3 Turn on the VVT Zone II's power.

For complete TruVu™ ET Display installation instructions, see the TruVu™ ET Display Installation and Start-up Guide.

Installing the VVT Zone II

Wiring sensors to the VVT Zone II's inputs

NOTE

WARNING

CAUTION

Wiring specifications

You can wire the following sensors to the VVT Zone II's inputs:

• Alternate space temperature sensor (page 20)

• Supply Air Temperature sensor (page 20)

• Duct Air Temperature sensor (page 21)

• CO

sensor (page 21)

• Relative Humidity sensor (page 23)

• Remote occupancy contact sensor (page 24)

This document gives instructions for wiring the sensors to the VVT Zone II. For detailed installation

instructions, see the device's Installation Guide.

Disconnect electrical power to the VVT Zone II before wiring it. Failure to follow this warning could

cause electrical shock, personal injury, or damage to the controller.

• Do not run sensor or relay wires in the same conduit or raceway with Class 1 AC or DC service wiring.

• Do not abrade, cut, or nick the outer jacket of the cable.

• Do not pull or draw cable with a force that may harm the physical or electrical properties.

• Avoid splices in any control wiring.

Cable from sensor to controller: If <100 ft (30.5 meters) 22 AWG, unshielded

If >100 ft (30.5 meters) 22 AWG, shielded

Maximum length: 500 feet (152 meters)

Installing the VVT Zone II

To wire the T55 sensor to the controller

T55 (Opt)

Gnd

T55 (Opt)

Thermistor

To wire the Supply Air Temperature sensor to the controller

Part #33ZCT55SPT

This wall-mounted sensor monitors space temperature and can be used instead of a ZS or wireless sensors.

1 Strip the outer jacket from the cable for at least 3 inches (7.62 cm). Strip .25 inch (.6 cm) of insulation from

each wire. Cut the shield and drain wire from the cable.

2 Wire the sensor to the controller, attaching the red wire to the

terminal. See diagram below.

3 Verify that the

jumper is in the

position.

terminal and the black wire to the

Part #33ZCSENSAT

Each VVT Zone II requires that a temperature sensor be installed in the supply air stream. Mount the SAT sensor at least 2 feet downstream from a hot water or steam coil, or at least 4 feet downstream from an electric heating coil.

Wire the sensor to the controller. See diagram below.

Installing the VVT Zone II

To wire a Duct Air Sensor to the controller

NOTE

Enable SAT

Enable SAT and REMOTE

To wire the CO2 sensor to the controller

NOTE

#33ZCSPTCO2

RH/CO2

0-5 Vdc

1 Wire the sensor to the controller. See diagram below.

Sensor wiring does not have polarity. The wires can be connected to either terminal.

2 Using electrical tape, insulate any exposed wire to prevent shorting.

3 Connect shield to earth ground (if using shielded wire to extend cable length).

4 Verify that the

5 Verify that the

jumper is on.

jumper is in the left position.

Part #33ZCSPTCO2LCD-01 (Display model) Part #33ZCSPTCO2-01 (No display) Part #33ZCT55CO2 (No display)

A CO

sensor monitors carbon dioxide levels. As CO2 levels increase, the VVT Zone II adjusts the outside air

dampers to increase ventilation and improve indoor air quality. These sensors also monitor temperature using a 10K thermistor.

A CO

sensor can be wall-mounted or mounted in a return air duct. (Duct installation requires an Aspirator Box

Accessory - Part #33ZCASPCO2.)

The sensor has a range of 0–2000 ppm and a linear 4-20 mA output. This is converted to 1-5 Vdc by a 250 Ohm, 1/4 watt, 2% tolerance resistor connected across the zone controller's CO2 input terminals.

Do not use a relative humidity sensor and CO2 sensor on the same zone controller.

1 Wire the sensor to the controller. See appropriate diagram below.

2 Verify that the

3 Verify the J7 jumper on the sensor is set to

jumper is set to

on the VVT Zone II.

Installing the VVT Zone II

Wiring diagram for #33ZCSPTCO2:

#33ZCT55CO2

RH/CO2

Gnd

RH/CO2

0-5Vdc

1 Wire the sensor to the controller. See appropriate diagram below.

2 Install a field supplied 250 Ohm 1/4 watt 2% tolerance resistor across the controller's

terminals.

3 Verify that the

jumper is set to

on the VVT Zone II.

and

Installing the VVT Zone II

Wiring diagram for #33ZCT55CO2:

To wire the Relative Humidity sensor to the controller

NOTE

RH/CO2

0-5 Vdc

Part #33ZCSENSRH-02

The Relative Humidity (RH) sensor is used for zone humidity control (dehumidification) if the rooftop unit has a dehumidification device. If not, the sensor only monitors humidity.

Do not use a relative humidity sensor and CO2 sensor on the same zone controller.

1 Strip the outer jacket from the cable for at least 4 inches (10.2 cm). Strip .25 inch (.6 cm) of insulation from

each wire.

2 Wire the sensor to the controller. See diagram below.

3 Using electrical tape, insulate any exposed resistor lead to prevent shorting.

4 Verify that the

jumper is set to

Installing the VVT Zone II

SW3

Wiring a remote occupancy sensor

REMOTE

5 Set

on the sensor as shown below.

You can wire a normally open or normally closed dry-contact occupancy sensor to the VVT Zone II's as shown below. The controller supplies the voltage needed for the input.

input

Installing the VVT Zone II

Wiring equipment to outputs

WARNING

Wiring specifications

NOTE

Use the following wiring diagrams to wire zone terminal equipment to the VVT Zone II's outputs.

Single duct (page 26)

Single duct 2-position hot water (page 27)

Single duct modulating hot water (page 28)

Single duct SCR electric heat (page 29)

Single duct combination baseboard and ducted heat (page 30)

Single duct staged electric heat (page 31)

Fan box 2-position hot water (page 32)

Fan box modulating hot water (page 33)

Fan box SCR electric heat (page 34)

Fan box combination base board and ducted heat (page 35)

Fan box 2-stage electric heat (page 36)

Wiring field-supplied actuators to the analog output (page 37)

Disconnect electrical power to the VVT Zone II before wiring it. Failure to follow this warning could

cause electrical shock, personal injury, or damage to the controller.

To size output wiring, consider the following:

• Total loop distance from the power supply to the controller, and then to the controlled device

Include the total distance of actual wire. For 2-conductor wires, this is twice the cable length.

• Acceptable voltage drop in the wire from the controller to the controlled device

• Resistance (Ohms) of the chosen wire gauge

• Maximum current (Amps) the controlled device requires to operate

Installing the VVT Zone II

Wiring diagram legend

Gnd

HWV

SAT

SCR

Space temp sensor

T55 (OPT)

– – –

Single duct only

Ground

Hot water valve

Supply air temperature sensor

Silicon controlled rectifier

ZS sensors or Wireless Adapter for

wireless sensors

Alternate space temperature sensor

Field-supplied wiring

+ 74 hidden pages

Carrier VVT Zone II, VVT Zone Installation And Startup Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

What is a VVT Zone II?

Introduction

Specifications

Safety Considerations

Field-supplied hardware

Mounting the VVT Zone II

To mount the controller and actuator

Installing the VVT Zone II

Wiring the VVT Zone II for power

To wire the controller for power

Addressing the VVT Zone II

Wiring for communications

Wiring specifications for BACnet MS/TP and ARC156

To wire the controller to the BACnet network

Wiring devices to the VVT Zone II's Rnet port

Wiring specifications

To wire ZS sensors to the controller

To wire the Wireless Adapter for wireless sensors

To wire an Equipment Touch to the VVT Zone II

To wire the TruVu™ ET Display

Wiring sensors to the VVT Zone II's inputs

Wiring specifications

To wire the T55 sensor to the controller

To wire the Supply Air Temperature sensor to the controller

To wire a Duct Air Sensor to the controller

To wire the CO2 sensor to the controller

To wire the Relative Humidity sensor to the controller

Wiring a remote occupancy sensor

Wiring equipment to outputs

Wiring specifications

Wiring diagram legend

Single duct only