Johnson Controls METASYS VAV110 Manuale utente

Application Specific Controllers Technical Manual 636.3

VAV Controller Section

Technical Bulletin

Issue Date 0309

Code No. LIT-6363040

Introduction Page 5





Description 5

 OEM Applications 8

 Standards Compliance *8

 Coordination of Factory Mounted VAV Systems 8

Configuring the Controller 11

 Using HVAC PRO for Windows Configuration Tool 11

 Defining a VAV Control Device Object in Metasys Software 13

Installation Procedures 17

 Tools Needed 17

 Environmental Information 17

 Mounting the Controller 18

 Power Line Wiring Transient Noise Precautions 21

 I/O and Communication Lines Wiring Transient Noise Precautions 23

Variable Air Volume (VAV) Controller

* Indicates those sections where changes have occurred since the last printing.

2 VAV Controller—Variable Air Volume (VAV) Controller

Wiring Details Page 25

 Power Source and Loads 26

 Grounding and Isolation 27

 I/O and Communication Terminals 29

 Power, Zone Bus, and N2 Connections 36

 Analog Inputs 36

 Binary Inputs 38

 Binary Outputs 38

 Analog Outputs 38

 Zone Bus 39

 Wiring to RLY50/002 Relays 39

 Wiring Sensors and Actuators 40

Networking the Controller 45

 N2 Bus Overview 45

 Installing the N2 Bus 46

 Zone Bus Communications 49

Application Examples 51

 Single Duct Applications 51

 Dual Duct Applications 63

Downloading/Commissioning 71

 Via Zone Bus 71

 Via N2 Bus 71

 Incremental Valve Actuator Stroke Time 72

 Incremental Damper Actuator Stroke Time 73

 Zone Terminal Setup for Balancing Contractors 73

* Indicates those sections where changes have occurred since the last printing.

VAV Controller—Variable Air Volume (VAV) Controller 3

Troubleshooting Page 75

 Hardware Installation Inspection 75

 Tools Needed for Troubleshooting 75

 Installation Checkout 76

 Troubleshooting the VAV Controller with HVAC PRO for Windows 81

 Troubleshooting the N2 Bus and Networked VAV Controller 82

 Zone Bus Troubleshooting -- HVAC PRO for Windows 83

Ordering Information 85

 Johnson Controls Code Numbers 85

 Vendor Code Numbers 87

Specifications *89

* Indicates sections where changes occurred since the last printing.

4 VAV Controller—Variable Air Volume (VAV) Controller

VAV Controller—Variable Air Volume (VAV) Controller 5

1 2FIntroduction

The Variable Air Volume (VAV) Controller is an electronic device for

digital control of single duct, dual duct, fan powered, and supply/exhaust

VAV box configurations. See 50HFigure 1. You may use the VAV as a

standalone controller or connected to the Metasysnetwork through a

Network Control Module (NCM) or Companionsystem.

When connected to the Metasys Network, the VAV provides all point and

control information to the rest of the network. The devices communicate

through an N2 Bus.

Each VAV Controller application uses a different sequence of operation,

all of which are covered in the HVAC PRO for Windows User’s Manual

(FAN 637.5).

Description

6 VAV Controller—Variable Air Volume (VAV) Controller

1 2 3 4 5 6

BINARY INANALOGINPUTS BINARY OUTPUTS

BINARY INPUT

ANALOG INPUTS

1 2 3 4 5 6 1 2 3 4

ANALOG INPUTS

COMMON

ZONE

STAT

BINARY OUTPUT

1 2 3 4 5 6 7 8

ZBUS

DSI

1 2 3 4 5 6

BINARY COM

1 2 3 4 5 6

110-111

BINARY IN

ANALOGINPUTS BINARY OUTPUTS

BINARY INPUTANALOGINPUTS

1 2 3 4 5 6 1 2 3 4

ANALOG INPUTS

COMMON

ZONE

STAT

BINARY OUTPUT

1 2 3 4 5 6

Z BUS

DSI

1 2 3 4 5 6

ANA OU

ANALOG

OUTPUT

1 2

BINARY COM

Figure 1: VAV110 (top) and VAV111 (bottom) Controller

VAV Controller—Variable Air Volume (VAV) Controller 7

Table 1: VAV Controller Model Features

Feature VAV100/101

(Discontinued) VAV110/111 VAV140/141

Ambient

Temperature

Rating

32 to 122F

(0 to 50C) 32 to 122F

(0 to 50C)

Analog Inputs 6

RTD temperature

elements (1000 ohm

nickel, platinum, or

silicon)

2k ohm setpoint

potentiometers

0 to 10 VDC or

0 to 2 VDC

transmitters

RTD temperature

elements (1000 ohm

nickel, platinum, or

silicon)

2k ohm setpoint

potentiometers

0 to 10 VDC or

0 to 2 VDC

transmitters

RTD temperature

elements (1000 ohm

nickel, platinum, or

silicon)

2k ohm setpoint

potentiometers

0 to 10 VDC or

0 to 2 VDC

transmitters

Binary Inputs 4

(4) Dry contacts

(1) Momentary push

button from zone

sensor for temporary

occupancy mode

BI 4 may be used as

an accumulator input

for frequencies less

than 100 Hz.

(4) Dry contacts

(1) Momentary push

button from zone

sensor for temporary

occupancy mode

BI 4 may be used as

an accumulator input

for frequencies less

than 100 Hz.

(4) Dry contacts

(1) Momentary push

button from zone

sensor for temporary

occupancy mode

BI 4 may be used as

an accumulator input

for frequencies less

than 100 Hz.

Analog

Outputs 0/2

0 to 10 VDC

@ 10 mA

0/2

0 to 10 VDC

@ 10 mA

0/2

0 to 10 VDC

@ 10 mA

Binary

Outputs 8/6

24 VAC Triacs

@ 0.5 amperes

8/6

24 VAC Triacs

@ 0.5 amperes, or

0.8 amperes if total

power is limited

8/6

24 VAC Triacs

@ 0.5 amperes, or

0.8 amperes if total

power is limited

N2 Bus Not Isolated * Isolated Isolated

Zone Bus Discrete connections

at controller Discrete connections

at controller

8-pin phone jack on

controller 8-pin phone jack on

controller 8-pin and 6-pin phone

jack on controller *

6-pin phone jack at

zone sensor 6-pin phone jack at

zone sensor

LED Indication * LED Indication *

24 VAC Power

Terminations Quick Connects

(Spade Lugs) * Removable Screw

Terminal Block Removable Screw

Terminal Block

I/O

Terminations Quick Connects

(Spade Lugs) Quick Connects

(Spade Lugs) Fixed Screw Terminal

Block *

Terminations Fixed Screw Terminal

Block * Removable Screw

Terminal Block Removable Screw

Terminal Block

* VAV Controller model feature differences

8 VAV Controller—Variable Air Volume (VAV) Controller

When providing VAVs for projects which use Traneor TITUS

terminal boxes, consider using the AS-VAVDPTx-1 product (refer to

Building VAVDPT Applications Application Note (LIT-6363042) in the

Application Specific Controllers Technical Manual (FAN 636.3). Trane

and TITUS are both Original Equipment Manufacturers (OEMs) who

provide VAV terminal boxes for projects. Trane typically provides the

damper actuator with their terminal box, and TITUS provides the damper

actuator with their QFPC Series Fan Powered Box. The VAVDPT comes

in two models, which include a VAV Controller and a DPT-2015 Velocity

Pressure Transducer. The DPT is mounted and prewired to the cover of

the VAV. Refer to the OEM Reference Manual (FAN 638).

The VAV Controller complies with the following standards:

zFCC Part 15, Subpart J, Class A

zIEEE 472, IEEE 518

zIEEE 587 Category A

zUL 916 Listed

zVDE 0871 Class B

A factory mounted VAV box control system requires close coordination

between a variety of different disciplines. Refer to the OEM Reference

Manual (FAN 638) for factory manufacturer’s details. Although the

responsibilities may differ per city or region, the following parties are

usually involved on the job:

zcontrols contractor

zmechanical contractor

zlocal VAV box manufacturer’s representative

zbalancing contractor

zelectrical contractor

Typically, the mechanical contractor is the focal point for coordinating the

entire process. The basic responsibilities under the domain of the

mechanical contractor are:

1. Purchasing the VAV box system. Most specifications include the

OEM mounting fees and enclosures for the control system in the

mechanical contractor’s price. Mounting fees vary per box

manufacturer but ranges can be found in the OEM Reference Manual

(FAN 638).

2. Providing the release schedule for the VAV boxes to the job.

3. Contracting, or working closely with, the balancing contractor to

ensure the system is set up per the mechanical prints.

Note: The owner often directly hires the balancing contractor. This

ensures neutrality in dealing with other contractors involved in the

project.

3F4F5FOEM

Applications

6F7F8FStandards

Compliance

9F10F11FCoordination of

Factory

Mounted VAV

Systems

VAV Controller—Variable Air Volume (VAV) Controller 9

In conjunction with the mechanical contractor, the controls contractor’s

responsibilities include:

1. Coordination of the control system release schedule to the box

manufacturer to ensure the mechanical system delivery schedule can

be met. Coordination with the local box manufacturer representative is

normally required.

2. Coordination with the electrical contractor to ensure the following

steps are covered.

z24 VAC power is provided at each VAV Controller.

zN2 Bus wiring is pulled and terminated.

zValve actuator wiring is pulled and terminated.

zZone sensor cables are pulled. The use of phone cable for

terminating zone sensor wiring allows basically anyone to

terminate zone sensors in certain locales.

zIf desired, the N2 address switches can be set by the electrical

contractor.

3. Initial loading of the HVAC PRO for Windowsconfiguration files is

done once the electrical contractor’s functions are completed in

preparation for the final system balancing.

4. Training of the balancing contractor to ensure the balancing contractor

knows how to use the Zone Terminal (ZT) or HVAC PRO for

Windows Commissioning mode so they can perform the final system

balancing.

5. Mounting and terminating the cable connections for the zone

temperature sensor. Set the N2 address switch if the electrical

contractor was not contracted to perform this function.

6. Configuring, downloading, and commissioning the controller.

10 VAV Controller—Variable Air Volume Controller

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