Liebert RAC2-8 manual Introduction

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Section 1: Introduction

See SECTION 5 —

INSTALLATION for special instructions when using the RAC2-8 with Liebert mini-MATE,mini-MATE Plus, and DataMate environmental control systems.

The Liebert RAC2-8 remotely controls from two to eight environmental units. Each unit is assigned to a Zone (room) from 1 to 4. In Zone 1, the largest room, the temperature and humidity can be monitored. The common alarm output from each unit is monitored and annunciated by the RAC2-8. Up to 20 system alarms can be stored with time and date stamp. All alarms are latching and must be manually cleared.

The most important control functions are Autochangeover, Autosequencing, and Standby Testing. Each unit can be assigned a Running or Standby status.

Autochangeover turns on a Standby unit if a Running unit in the same zone has an alarm. The Running unit (with alarm) will be turned off if that control option is selected. Each unit will return to its previous status when the alarm is manually cleared.

Autosequencing balances unit run-times by changing Standby units to Running (and Running units to Standby) at programmed time intervals.

Standby Testing turns on Standby units at programmed intervals to test their operation. Note that Autosequencing and Standby Testing cannot both be selected at the same time.

Other control functions include Manual Override, Emergency Power Operation, Power Failure Mode, Password, and Programmable Delays. Refer to SECTION 4 — GLOSSARY OF CONTROL FUNCTIONS for more details.

System outputs include Humidity Lockout Relay, Optional Control Lockout Relay, and Common Alarm. Communication ports are EIA-232 for terminal or printer, a modem port, and a proprietary EIA-422 port for communication to a Liebert SiteScan monitoring system.

The RAC2-8 can be operated locally from the built-in control panel or remotely from an optional terminal (EIA-232 communication). This manual shows examples of several typical display screens during both local and remote operation.

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Contents $XWRð&KDQJHRYHUý&RQWUROOHU Table of Contents Table of Figures RAC2-8 UnitPage Introduction Page Installation To start up the RAC2-8Operation Page Operation Glossary of Control Functions for more detailsSequencing Status Screens cont’d Status Sub-menuDelay UnitsStatus Sub-menu cont’d Set Options Sub-menuSet Options Sub-menu cont’d Function Delays TEMP/HUM Password StandbyAlarm Sub-menu Time Set Clock Sub-menuDate DAY of WeekUnit 01 Forced on Force OFF Restore Return Terminal LOG onStatus Screen Number of ZONES/NUMBER of Units PER Zone Setup Zones/Units OptionsSetup Zones/Units Options cont’d Unit StatusUnit Shutdown on Alarm Emergency Power Units08 0 no Alarms Review and Alarms Clear Unit LabelsSet Clock Override a Unit Set Modem Options Setup Temp/Humid Options Setup Temp/Humid Options cont’dSet Modem Options cont’d Setup Standby Unit Options Display SS Alarm Block Set New PasswordAlarms List of AlarmsAlarm Delay Alarm AnnunciationAlarm Communications AutochangeoverAutosequencing Common Alarm-Output Clear AlarmsCommon Alarm-Inputs KeyEmergency Power Operation DelayEmergency Power OFF EPO Hold DelayInactive Unit Humidity AlarmsHumidity Lockout IntervalPower Failure Mode Normal TemperaturePassword OverrideStandby Testing Restart DelayRestore Running UnitsTemperature Staging Temperature AlarmsTemperature Sensitivity TerminalZones Installation TB2 RAC2-8 Dimensional Enclosure Diagram RAC2-8 Component Arrangement RAC2-8 Connection Diagram RAC2-8 Switch and Jumper Settings
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