Data Aire Dara-4g2 Manuale di istruzioni

Data Aire, Inc. reserves the right to make design changes for the purpose

of product improvement or to withdraw any design without notice.

TABLE OF CONTENTS

1- Overview and Design Features ........................................................................................ 3-6

Overview...........................................................................................................................3

Design Features ...............................................................................................................3

Routine Status Display .....................................................................................................4

Conditions and Functions Displayed ................................................................................4

Power On/Off Switch ........................................................................................................4

System Reset Button........................................................................................................4

Control Outputs.................................................................................................................4

Summary Alarm Contacts.................................................................................................5

Audible Alarm and Alarm Silence......................................................................................5

Historical Data ..................................................................................................................5

Units Runtimes .................................................................................................................5

Menus Driven to Program Lead/lag and Rotation Schedule ............................................5

Forced Rotation ...............................................................................................................5

Conditions and Functions Displayed ................................................................................4

Alarm Input Signals...........................................................................................................6

Manual Bypass Switches..................................................................................................6

Optional Zone Temperature and Humidity Sensor............................................................6

Optional Network communication for monitoring and control ...........................................6

2 – Program Menus Setting .................................................................................................. 7-9

Buttons functions .............................................................................................................7

Passwords .......................................................................................................................7

Menu A- On/Off ................................................................................................................7

Menu C- Clock .................................................................................................................8

Menu D- Input/output........................................................................................................8

Menu E- Historical data ....................................................................................................8

Menu F- Information .........................................................................................................8

 MenuG-Networkconguration........................................................................................8

Menu H- Calibration sensor..............................................................................................8

Menu I- Manual Control ....................................................................................................8

Menu J- Factory settings ..................................................................................................8

Menu K- Alarms and Limits...............................................................................................8

 MenuL-CongurationI/O ................................................................................................9

3 – Control Logic................................................................................................................. 9-10

Alarm Standby Logic.........................................................................................................9

Zone Temperature Control..............................................................................................10

4 – Wiring Connection .......................................................................................................11-12

5–Specications.....................................................................................................................13

4•dara-4g2User Manual

1. OVERVIEW AND FEATURES

Overview

dara-4g2is a Lead/Lag Rotation and Alarm Auto changeover control panel for up to four HVAC units.

ThenumberofHVACunittomaintainonlineandtoholdofineisprogrammedondara-4g2 menus.

Routine lead/lag unit rotation can be set from 4 hours up to 30 days, or no rotation. Force rotation

setting allows user to manually advance the rotation schedule to the next desired lead/lag rotation

pattern. Each HVAC unit is controlled by a non-power relay contact. Unit status messages are con-

tinually scrolled on a front panel 4 rows 22 characters liquid crystal display (LCD). dara-4g2has two

levels of password to prevent an unauthorized access for service and for programming. dara-4g2

has a manual diagnostic menu that allows user to test the control inputs and outputs. Four built-in

manual override switches allow the user to override the automatic functions in an emergency case

or a failure of the dara-4g2. An optional zone air temperature and humidity sensor allows dara-4g2to

monitor the zone air condition and controls standby unit based on a zone air temperature setpoint

(Temperature Assist Mode). An optional network communication card allows dara-4g2to interface

with a BMS via Modbus or BACnet network protocol to monitor and control the system.

Design Features

• Fusesprotected24VACpowerinput

• Built-inliquidcrystaldisplaywithsystemstatus

• PowerOn/Offslideswitch

• Fourcontrolrelayswith8ampnon-powercontrolcontacts

• Audiblealarmwithselectablesoundpatterns

• AformCsummaryalarmcontactsforremotealarmstatusmonitoring

• Forcerotationmenuforrotationpatternselections

• Fouralarminputsdrycontacts

• Unitsmanualbypassswitches

• Softbuttonsforprogramming

• Menusdriventoprogram

o Number of units connected

o Number of units on

o Lead unit selection

• Optionalzonetemperaturesensorformonitoringandcontrol

• Highzonetemperaturesetpoint

• Manualdiagnostictest

• Twolevelspasswordsforsecurity

• Dateandtimedisplaywithrealtimeclock

• Rotationscheduledisplay

• Currentunitsstatuswithleadunitindicator

• Historicaldataforalarmhistoryandunits’runtimes

• Silencealarmbuttontoresetalarmunits

• Unitsonfail-safe

• USBportforrmwareupgrade

• OptionalBACnetMSTP,BACnetIPandModbusRTUnetworkcardforBMSinterface

5•dara-4g2User Manual

Routine Status Display

Status messages are continually scrolled on a built-in 4-rows, 22-characters liquid crystal display

(LCD). All information is routinely reported on the dara-4g2display as follows:

Routine Status Messages

Message Meaning of Messages

dara-4g2

11:11:11 16:30 Time and date.

System status: on dara-4g2is currently online.

U1 U2 U3 U4 Number of unit connected.

Run Run Off Off Current running and standby unit status .

Black box indicates current leading unit.

Time to next rotation Time to next rotation schedule.

Days:00 Hrs:23 Min:45 Countdown time clock to the next rotation.

Optional Status Messages

TEMP: 72.2° F Display if an optional Zone temperature sensor installed.

R. HUM : 45% Display if an optional Zone Relative humidity sensor installed.

Alarm Messages

Unit 1 In Alarm Unit 1 has alarm

Unit 2 In Alarm Unit 2 has alarm

U1 U2 U3 U4 Number of unit connected

R+A Run ALM ALM R+A = Unit has alarm but must stays online because there is

no standby unit available.

High Zone Air Temperature Optional zone temperature is higher than zone temperature

setpoint plus deadband.

Standby Units Assists Standby unit is on by zone temperature setpoint

Override Switch Activated Manual override switches are on

Power On/Off Switch

The main power ON/OFF switch for the dara-4g2panel is located on circuit board inside the enclo-

sure. The switch controls 24 VAC power input to dara-4g2circuit board and controller. After turning

themainpowerON/OFFswitch,pressandholdtheESCbuttononthedisplayforve(5)seconds,

to turn on the dara-4g2controller.

System Reset Button

Alarm Silence button will be used to reset dara-4g2to its original state after an alarm change-over

event.Theunit’salarmmustbeclearedandunit’salarmcontactmustbeopenbeforeareset.Press

the Alarm silence button twice when alarm message appears on dara-4g2display to reset the dara-

4g2.

Control Outputs

There are four 8-Amp @250VAC normally closed contacts on dara-4g2to control four HVAC units.

These contacts will be wired to each unit for on/off control. dara-4g2will open the contacts to put

standby units into off mode or close the contacts to activate the units. The fail- safe mode of dara-

4g2control contacts is normally close; this will keep all units running if dara-4g2panel fails.

6•dara-4g2User Manual

Summary Alarm Contacts

dara-4g2has a standard form C (N.C and N.O) summary alarm contacts for system monitoring.

When an alarm condition is detected, the alarm contacts will change its state until the alarm condi-

tion is corrected.

Audible Alarm and Alarm Silence

The audible alarm will sound when dara-4g2detects an alarm condition. The audible alarm sounds

can be programmed to short beep, long beep, full on or none using Audio mode on menu K- Alarms

and Limits of the dara-4g2. Press Silence button once when alarm display on LCD screen to silence

and audio alarm.

Historical Data

dara-4g2can record up to 100 alarm events. Alarm history can be viewed in Historical Data menu

E and cleared using Reset Alarm Log setting in menu K- Alarm and Limits. To reset alarm log, go to

menu K, change the Reset Alarm Log setting from NO to YES, alarm log will clear and setting will

reverse to No.

Units Runtimes

dara-4g2recordsunits’runtimesinitshistoricaldatamemory.Units’runtimescanbeviewedinmenu

E Historical Data. To view runtimes, go to menu E then press down key to go to Runtimes screen. To

clear runtimes, use enter and up or down key to change letter “No” next to runtime to “Yes”, runtime

will reset to zero value.

Menus Driven to Program Lead/Lag and Rotation Schedule

The following unit Lead/lag and rotation schedule settings are programmed in menu J-Factory set-

tings of the dara-4g2. Factory password requires accessing this menu.

System Settings

• UnitintheZone(1-4)

 Thissettingdenesthenumberofunitsareconnectedtodara-4g2paneltorotation 

control. It can be set from 1 to 4.

• NumberUnitsOn(1-4)

 Thissettingdenesthenumberofunitsneedtobeonlineatalltimes.

Rotation

• TimeRotation:None,4hrs,8hrs,12hrs,24hrs,7days,14days,30days

• CurrentLeadUnit:Unit1(Unit2,Unit2,Unit3)

This indicates the current lead unit, use Force Rotation setting to select a desire lead unit.

Forced Rotation

When the dara-4g2panelisrstpoweredonandnishedwithitsstart-upself-tests,itwillalways

begin with the default programmed rotation pattern with unit#1 as the lead unit. To select a differ-

ent rotation pattern go to menu J-factory Settings then go to Force Rotation and change the setting

from No to Yes. Each time the Force Rotation menu setting is changed the leading unit will rotate to

the next available unit. dara-4g2will begin using the last programmed pattern when panel is reset.

Rotation interval timing is restarted fresh each time a new pattern is selected.

All possible rotation patterns are shown in the following chart. Each number refers to the HVAC Unit

number:

1 = Unit 1

2 = Unit 2

3 = Unit 3

4 = Unit 4

7•dara-4g2User Manual

Active online units are indicated with bold number in the chart, and standby unit are indicated with

small unit number in the chart. The Off designation means that the HVAC Unit is currently OFF but

available in the case of alarm.

Rotation Patterns

Pattern 1 Pattern 2 Pattern 3 Pattern 4

2 Units connected

1 in Off 1 > 2 n/a n/a n/a

3 Units connected

1 in Off 1 > 2 > 3 2 > 3 > 1 3 > 1 > 2 n/a

2 in Off 1 > 2 > 3 2 > 3 > 1 3 > 1 > 2 n/a

4 Units connected

1 in Off 1 > 2 > 3 > 4 2 > 3 > 4 > 1 3 > 4 > 1 > 2 4 > 1 > 2 > 3

2 in Off 1 > 2 > 3 > 4 2 > 3 > 4 > 1 3 > 4 > 1 > 2 4 > 1 > 2 > 3

3 in Off 1 > 2 > 3 > 4 2 > 3 > 4 > 1 3 > 4 > 1 > 2 4 > 1 > 2 > 3

If Time Rotation in Menu J-Factory Settings is set to “None” then units remain in an unchanging

(xed)lead/lagpattern.TheForceRotationmenucanstillbeusedtoforcetherotationpatterns

toselectthedesiredxedpattern.Thelead/lagpatternwillremainunchangedindenitelyuntilthe

pattern is manually advanced.

Alarm Input Signals

dara-4g2panel accepts four alarm inputs dry contacts from the Alarm Relay at each HVAC Unit.

These contacts must be dry set of contacts (Non-Power contacts). dara-4g2panel will indicate alarm

status based on the conditions of these alarm input signals (Open Contact = no alarm; Close Con-

tact = active alarm).

When alarms are detected, dara-4g2’salarmauto-changeoverfunctioncansystematicallybringon-

line an equal number of designated standby units to make up for any lost capacity until all standby

unitsareinuse.SpecicAlarmStandbycontrollogicoptionsareprogrammedonmenuK-Alarm

& Limits – Unit Action menu. These options are: Turned Off, Stay On, and Condition. See Alarm

Standby Logic section below for detailed logic.

Manual Bypass Switches

The dara-4g2panel is equipped with 4 manual bypass switches to override the dara-4g2panel

and manually turn on each corresponding HVAC unit. dara-4g2monitors the status of the bypass

switches, the dara-4g2audible alarm will sound if programmed and the LCD will display the mes-

sage MANUAL OVERRIDE SWITCH ACTIVATED if one of the manual override switches is in the

on position. However, this condition does not activate the dara-4g2alarm relay and no changes are

made to the standard lead/lag rotation and alarm auto changeover sequence.

Optional Zone Temperature and Humidity Sensor

Optional Zone temperature and humidity sensor can be connected to dara-4g2for monitoring and

temperature control. Select Temperature Assist if zone temperature control is desired. dara-4g2will

bring next available standby Unit online when zone temperature rises above Zone High Tempera-

ture setpoint plus Temperature deadband.

8•dara-4g2User Manual

Optional Network Communication card for Monitoring and Control

dara-4g2supports an optional network communication card that allows an interface with a BMS or

BAS system for system monitoring and control. dara-4g2supports one of the following network pro-

tocols: Modbus RTU. Modbus TCP/IP, BACnet MS/TP, BACnet IP, SNMP.

The following points are available:

For monitoring:

- Units’status(onoroff)

- Units’alarm(unitinalarmmode)

- Manual override alarm status

- Optional zone temperature reading

- Optional zone humidity reading

For Control:

- Change units status setting

- Zone temp setpoint

- Zone Temp deadband

- Changeover delay

- Changeover schedule

9•dara-4g2User Manual

2. PROGRAM MENUS SETTING

Button Functions

Alarm Allows viewing of active alarms

Silences audible alarms

Resets active alarms and reset the system

Allows entry to Main Menu

Go to Password screen

ESC

Return to previous screen or exit menus

Hold 5 seconds to turn system ON or OFF

Up Allows scrolling to next screen

Advance to next menu

Allows values changes (increase)

Down Returns to previous screen

Advance to next menu

Allows value changes (decrease)

Enter

Allows entry to Menus (enter programming mode)

Advances cursor and save settings

PROGRAMMING

Passwords

To enter dara-4g2Menu mode a password is required, press Menu button then use Enter and Up/

Down button to enter Service password which is default to 0000 (menu A to I) or Factory password

which is default to 0002 (menu J to L) then press Enter.

To change passwords, press Menu button to go Security Access screen (Insert Password page)

then press Down button to go to change Service password screen or press Down button twice to

go to change Factory password page. Use Enter and Up/Down button to enter new password.

10•dara-4g2User Manual

•MenusandSettings

MENU SETTINGS

A - On/Off Start-Delay : 5s (5s-600s)

Start-up Mode: Off (On)

C - Clock Day

Date

Hour

D - Input/Output No programming or settings. Only to view panel inputs and outputs

D=digital and B= binary

E - Historical Data ->Scroll Up/Down? Press Enter then use Up/down button to view alarm

history and unit runtimes

F - ?Information Data Aire Inc.

Model dara-4g2

Ver : 0.1

Controller ID: 001

BIOS 6.09 11/12/12

Boot: 4:07 12/18/09

G-NetworkCong BMS PORT 1

Protocol: N/A – Modbus RTU, BACnet MSTP and BACnet TCP/IP*

*Optional network card required.

H - Calibrate Sensor Zone Temperature (Optional Zone sensor required)

Input B001

Offset: 0.00

Value 72.01 (current value)

Zone humidity (Optional Zone sensor required)

Input B002

Offset: 0.00

Value: 48.00 (current value)

I - Manual Control Return to Auto: 10s (10-300s) Time delay to reverse manual mode to auto

mode- This is used for relays testing only.

Unit 1 Auto Off/On (change to Man then toggle off to on or on to off)

Unit 2 Auto Off/On

Unit 3 Auto Off/On

Unit 4 Auto Off /On

Alarm Auto Off /On

Manual Override

Manual DI 1: OFF

Manual Position: CLOSED

DI 1 Status: Open (Turn on a manual override switch to test input)

J - Factory Settings Screen Flip Delay: 2s (2-10s)

Units in the Zone: 2 (1-4)

Number Units On: 1 (1-4)

Temp. Sensor: Not Used (Installed)

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