Johnson Controls NXA-VAV-01 Manual de usuario

NXA-VNXA-V

NXA-V

AV-01V-01

V-01V-01

V-01

VARIABLE AIR VOLUME

CONTROLLER

Installation Guide

TEC DOC # LIT-TD-2001 09/2001

The documentation contained in this publication is the exclusive

property of Johnson Controls, Inc., and its use is restricted to the

licensed software with which it is furnished. This publication may not

be used for any other purpose without the express written consent of

Johnson Controls, Inc. Johnson Controls, Inc., reserves the right to

update specifications when appropriate. Information contained in

this document is based on specifications believed to be correct at the

time of publication.

Echelon ©, Coactive©, Windows NT©, and General Electric©are

registered trademarks and service marks of companies other than

Johnson Controls, Inc. FSC™, CPL™ and NexSys™ are trademarks of

Johnson Controls, Inc.

System Products www.johnsoncontrols.com

9410 Bunsen Parkway Revised 09/2001

Louisville, KY 40220 Printed in U.S.A.

FCC WARNING

The Federal Communications Commission (FCC) requirements pre-

scribe certification of personal computers and any interconnected

peripherals in the FCC rules and regulations.

This device complies with Part 15 of the FCC rules. Operation is

subject to the following two conditions: This device may not cause

harmful interference, and this device must accept any interference

received, including interference that may cause undesired operation.

This equipment generates and uses radio frequency (RF) energy for its

operation and, if not installed and used in accordance with the

installation and operation manual, may cause interference to radio

and television reception. It has been found to comply with the limits

for a Class A computing device pursuant to the aforementioned

regulations. These are designed to provide reasonable protection

against such interference when operated in a residential area. Only

peripherals (computer input/output devices) certified to comply with

the Class A limits may be connected to this device. Operation with

noncertified computer peripherals is likely to result in interference

with radio and television reception. If this equipment does cause

interference to radio or television reception, the user is encouraged to

correct the situation by one or more of the following measures:

•Relocate the receiver with respect to the computer.

•Move the computer away from the receiver.

•Plug the equipment into a different outlet, so that the computing

device and receiver are on different branch circuits.

•Disconnect and remove any unused cables that may be acting as a

transmission source.

•Make certain that the computing device is plugged into a

grounded outlet receptacle.

If necessary, contact Johnson Controls, Inc., for additional sugges-

tions.

Installation Guide VAV-01 Controller NexSys

SYMBOLS

This is the symbol for Electro-Static Discharge. Electro-Static

Discharge (ESD) can damage certain electronic devices. ESD

is a transfer of electrostatic charge between bodies at different

electrostatic potentials caused by direct contact or induced by a

electrostatic field. The threshold for feeling an electro-static discharge

is approximately 900 to 1000 volts. The average spark produced by a

static discharge from a human body varies from about 10,000 to

25,000 volts.

ESD can cause damage to integrated circuits (IC). Due to the small

size of these complex devices, the ESD sensitivity has increased so

much that some of these devices can be destroyed or damaged by as

little as 20 volts. ESD damage is easy to induce, hard to detect, and is

expensive to repair. Workers could be subjecting an electronic device

to lethal voltages without being aware. The following is a list of

precautions when handling static sensitive devices.

·A conductive ground strap should be worn to assure that you are at

ground potential. If a ground strap cannot be used, you should

ground yourself before touching the device and remain in contact

with a grounded metallic object during the entire time while

working with the device.

·Containers, tools, test equipment, and fixtures that come into

contact with the device should be properly grounded. Grounding

of electrical equipment should be done by a grounded plug, not

through the conductive surface of the grounded workstation.

· Workers clothing should never make contact with the device and

workers should avoid activities that cause friction in the area of the

workstation (wiping feet, rubbing of hands, etc.).

·Workers should avoid touching leads or contacts.

This is the symbol for caution and represents possible

equipment damage. When this symbol appears, follow the

succeeding text to prevent possible equipment damage.

This is the symbol for danger and represents possible bodily

injury or threat to life and limb. When this symbol appears,

follow the succeeding text closely for safe operation.

NexSys VAV-01 Controller Installation Guide

Table of Contents

VAV-01 Overview ..................................................................................... 6

Inspection .................................................................................................... 7

Requirements .............................................................................................. 7

Location ...................................................................................................... 7

Mounting..................................................................................................... 8

Airflow Sensor Connections ............................................................ 9

Wiring Connections ................................................................................... 11

Power Supply ............................................................................................. 11

Power Connections............................................................................ 11

Thermistor Wiring ............................................................................. 12

Digital Outputs ................................................................................... 13

Digital Outputs DO-1 and DO-2 - Damper Wiring ................. 14

Digital Output DO-3 - Fan Wiring ................................................ 15

Digital Output DO-4 and DO-5 - Electric Staged Reheat ........ 16

Digital Output DO-4 and DO-5 - Floating Reheat .................... 18

Digital Output DO-4 and DO-5 - Pulse Width Modulation .... 19

Warranty ...................................................................................................... 20

Warranty Limitations ......................................................................... 20

Disclaimer of Warranties .................................................................. 20

Purchaser’s Responsibility.................................................................. 20

Installation Guide VAV-01 Controller NexSys

VAV-01 OVERVIEW

The JCI VAV-01 Controller consists of a Variable Air Volume (VAV)

controller integrated with a velocity pressure sensor. It provides

pressure dependent/independent cooling control for fan powered VAV

terminal boxes with or without reheat capacity.

The VAV-01 Controller is a 4”x 6” circuit board using SMT (surface

mount technology) components. The board is snap-track mountable

and has a built-in airflow sensor, 5 Triac outputs, 24 VAC input, a FTT-

10 free topology transceiver and a STAT/Configuration port. The VAV-

01 can support stand-alone operation but is best utilized when used

in conjunction with network communications. The unit is shown in

Figure 1 below:

Network

Connection

ESUSA

Thermostat

Connection

}

Analog

Input

24VAC

Power

Input

}

Digital

utputs

VAV-01 Cover

}

Airflow

Sensor

Inputs

(Pneumatic)

}

RESET

Pushbutton

Service

Pushbutton

Service

Pushbutton

LED

Service

RESET

(HI)

Stat

Port

Status

LED

UT TEST

THERM

TEMP

GND D 5 D 4 D03 D02 D01 NET +NET -STAT +STAT-

utput

Test

Jumper

(L )

GND

H T NEU

24VAC

J4 J3 J2

Figure 1. VAV-01 Controller.

NexSys VAV-01 Controller Installation Guide

INSPECTION

Inspect the carton for possible damage. If damaged, notify the

appropriate carrier immediately. Inspect the components for obvious

damage. Contact Electronic Systems USA before returning damaged

products.

REQUIREMENTS

• Job wiring diagrams.

• Tools (not provided):

- Appropriate screwdrivers for wiring terminals and mounting screws.

- Digital Volt/Ohm Meter (DVM).

• Training: Installer must be a qualified, experienced technician.

• VAV-01, enclosure for conduit applications (not provided).

• ULlisted Class 2 power transformer (not provided) supplying a

nominal 24 VAC (20.4 to 30 VAC) with a minimum rating of 5 VA at

50/60 Hz and 5 VA plus DO load ( 24 VA total max.) at 50/60 Hz.

LOCATION

CAUTION

• AVOID LOCATIONS WHERE EXCESSIVE MOISTURE, CORROSIVE

FUMES, EXPLOSIVE VAPORS, OR VIBRATIONS ARE PRESENT.

• AVOID ELECTRICAL NOISE INTERFERENCE. DO NOT INSTALL NEAR

LARGE CONTACTORS, ELECTRICAL MACHINERY, OR WELDING

EQUIPMENT.

• JCI VAV-01 CONTROLLERS ARE INTENDED FOR INDOOR USE ONLY.

LOCATE WHERE AMBIENT TEMPERATURES DO NOT EXCEED

131°F (55°C) OR FALL BELOW 32°F (0°C) AND RELATIVE HUMIDITY

Installation Guide VAV-01 Controller NexSys

DOES NOT EXCEED 85% OR FALL BELOW 5%, NON-CONDENSING.

MOUNTING

The JCI VAV-01 Controller can be mounted in any direction and on

any plane. Mounting dimensions are 4”x6” overall board size for

snap-track mounting. For applications requiring mounting using

standoffs the .150” circuit board mounting holes are spaced 3.5”x5.5”.

Dimensions shown in Figure 2 below are in inches and (mm).

When mounting the JCI VAV-01 Controller in the snap-track railing be

careful not to exert too much pressure when inserting the VAV-01

board into the snap-track.

NOTE:

Follow static electricity precautions when installing, servicing,

or operating the system.

GND

H T

NEUTRAL

Service

RESET

HIGHL W

THERM

TEMP

GND D 5 D 4 D03 D02 D01 NET +NET -STAT+STAT-

UT TEST

4.00"

(102)

3.50"

(89)

.25"

(6)

.25"

(6)

5.50"

(140)

6.00"

(152)

1.315"

(33)

NexSys VAV-01 Controller Installation Guide

Figure 2. Mounting dimensions

AIRFLOW SENSOR CONNECTIONS

Use either 1/4 in. O.D. FRPE polyethylene tubing or 1/8 in. I.D.

Tygon tubing for piping connections. Maximum run of tubing is 5

feet.

1. Remove the yellow plastic fitting caps from the barbed fittings of

the VAV-01 airflow sensor inputs. See Figure 3 below.

2. Connect the tube from the low pressure fitting on the controller

to the low pressure tap on the airflow sensor. See Figure 3

below.

3. Connect the tube from the high pressure fitting on the controller

to the high pressure tap on the VAV terminal. See Figure 3

below.

Installation Guide VAV-01 Controller NexSys

Service

RESET

(HI)

UT TEST

THERM

TEMP

GND D 5 D 4 D03 D02 D01 NET +NET -STAT +STAT- GND

H T NEU

24VAC

To HIGH pressure fitting on the airflow sensor.

To L W pressure fitting on the airflow sensor.

(L )

Figure 3. Airflow Sensor Connections.

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