Page 3 - TABLE OF FIGURES; ii
TABLE OF FIGURES Figure i. Typical System Configuration..........................................................................................................iii Figure 2–1. Local Control Panel ..........................................................................................................
Page 4 - UNIT 1
Liebert RAC2-8 • iii Figure i. Typical System Configuration RAC2-8 N.O. Power Source 120 VAC Control Input Common Alarm Output UNIT 1 Control Input Common Alarm Output UNIT 2 Control Input Common Alarm Output UNIT 8 Aux Pwr Out 24 VAC, 2A Terminal Port Modem Port SiteScan N.O. N.O. N.C. N.C. N.C. C ...
Page 6 - Section 1: Introduction; See; SECTION 4 — GLOSSARY OF CONTROL FUNCTIONS
Liebert RAC2-8 • 1 Section 1: Introduction 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 a...
Page 8 - Section 2: Start Up; and
Section 2: Start Up To start up the RAC2-8: 1. Mount unit to wall. 2. Connect cables. 3. Set switches and jumpers on circuit boards as required for your application. Refer to instructions and illustrations in SECTION 5 — INSTALLATION . 4. Make user programmable selections from the local control pane...
Page 10 - Section 3: Operation; This chapter describes how to use the RAC2-8.; Local; Refer to; SECTION 4 —; Sequencing Status Screens; NO ALARMS PRESENT
Section 3: Operation This chapter describes how to use the RAC2-8. Local The following screens are displayed at the LCD display built into the RAC2-8 unit control panel. Refer to SECTION 4 — GLOSSARY OF CONTROL FUNCTIONS for more details. Sequencing Status Screens With power ON, the following status...
Page 11 - Password Screen; ENTER PASSWORD; Main Menu; Press the Menu button to display the Main Menu:
Section 3: Operation Sequencing Status Screens (cont’d.) AUTO SEQUENCING ON DAY 06 OF 15 <00:00> TEMP STAGING OFF Each screen is automatically displayed for 3 seconds. To control the display of the status screens, you can press the Hold/Sequence button to hold a screen and to manually step thr...
Page 14 - Complete all of these selections before exiting this setup; The RAC2-8 then displays the Set Status screen for Zone 1:
Section 3: Operation From the Set Units menu, select 1. ZONES/UNITS to select the number of zones, number of units in each zone, and operating status of each unit. Complete all of these selections before exiting this setup function. Note that the Clear button will not allow you to exit these screens...
Page 17 - for details on the Humidity Lockout feature.
Section 3: Operation 1. F 2. C 5. RETURN From the T/H menu, press 4. LOCK to configure the optional Humidity Lockout feature: HUMIDITY LOCKOUT SET HI>00 LOW>00 (RANGE 20-80) 00=OFF E=NEXT C=RETURN Refer to SECTION 4 — GLOSSARY OF CONTROL FUNCTIONS for details on the Humidity Lockout feature. S...
Page 21 - Terminal; On UNIT 03 FORCED ON; The Main Menu is displayed on a terminal as shown below:
Section 3: Operation Terminal A local terminal can be connected directly by an EIA-232 communication cable to the RAC2-8, or a remote terminal can be connected through modems. All of the status information and control functions available at the RAC2-8 local display are available from the terminal. A...
Page 23 - NUMBER OF ZONES/NUMBER OF UNITS PER ZONE; Configure the number of zones and number of units as desired.; UNIT STATUS; ZONE STATUS
Section 3: Operation Setup Zones/Units Options Press 2 from the Main Menu to display the Set Options menu. The following screens show the terminal display that enables you to configure the Options menu items. NUMBER OF ZONES/NUMBER OF UNITS PER ZONE RAC2-8 MAIN MENU SET OPTIONS MENU 1. Set Number of...
Page 24 - EMERGENCY POWER UNITS; Unit Shutdown on Alarm
Section 3: Operation 2 02 1 RUNNING 3 03 1 RUNNING 4 04 1 STANDBY 5 05 2 RUNNING 6 06 2 STANDBY 7 07 0 UNPROGRAMMED 8 08 0 UNPROGRAMMED PRESS UNIT (1-8) KEY <ESC TO QUIT> 3 PRESS A KEY (R=RUN or S=STANDBY) <ESC to quit> >07-17-96 00:24:29 UNIT 03 SHUTDOWN ** SET UNIT STATUS ** UNIT LA...
Page 28 - Do not; . Modem messages describe modem activity such as No; SECTION 5 —
Section 3: Operation Set Modem Options Press 7 from the Main Menu to display the Set Modem Options screen. RAC2-8 MAIN MENU ** SET MODEM OPTIONS ** 1. Phone Number = 2. Site ID = 3. Dial Prefix = ATE1X4DT 4. Redial Interval (minutes) = 01 5. Redial Tries (--- = Forever) = 03 6. Modem Messages Y/N = ...
Page 30 - one; of them turned ON. Select the option (or
Section 3: Operation Setup Standby Unit Options Press 9 from the Main Menu to display the Set Standby Unit Options screen: RAC2-8 MAIN MENU ** SET STANDBY UNIT OPTIONS ** 1. Auto Sequencing = ON 2. Standby Testing = OFF 3. Day Interval = 89 4. At Time = 07:00 <ESC> TO EXIT Auto Sequencing = (E...
Page 32 - Section 4: Glossary of Control Functions; Alarms; List of Alarms
Section 4: Glossary of Control Functions The following terms are used to describe the control and operation of the Liebert RAC2-8. For each term, both the operator actions and the system performance are defined. Refer to this section if necessary while setting up your system or to answer any questio...
Page 33 - Autochangeover
Section 4: Glossary of Control Functions Alarm Annunciation The RAC2-8 provides the following alarm annunciation mechanisms: • Audible indication (horn). • A lighted ‘Alarms Present’ front panel indicator. • Activation of the Common Alarm relay output. • Display of alarm messages on the front panel ...
Page 36 - and all other; are ignored. This delay begins when any changeover Occurs,
Section 4: Glossary of Control Functions Delay Refer to Alarm Delay, Hold Delay, and Restart Delay. E key The Enter key <E> at the local control panel serves two functions: • Causes data entered in setup display pages to be stored in the RAC2-8 permanent memory. • Causes selection of next unit...
Page 37 - instead; . The modem selections such as phone number,
Section 4: Glossary of Control Functions Humidity Alarms Humidity alarms are caused when the humidity detected by the remote sensor in Zone 1 exceeds the programmed High or Low trip-point. Trip-points are selected in 1% RH increments from the display. Entering 00 disables an alarm. A Humidity Alarm ...
Page 38 - Force ON of any unit; Password; TERM; disables the password at a local terminal. The Password is; always; Power Failure Mode
Section 4: Glossary of Control Functions Normal Temperature Refer to Temperature Staging. Override The RAC2-8 allows manual control of units from the display and also from switches inside the enclosure. To manually turn all units ON refer to Manual Override. To manually select units to be ON during ...
Page 40 - Normal Temperature
Section 4: Glossary of Control Functions Running status. Standby units can be turned ON by Autochangeover, Autosequencing, or Standby Testing. Temperature Alarms Temperature alarms are caused when the temperature detected by the remote sensor in Zone 1 exceeds the programmed High or Low trip-point. ...
Page 42 - Section 5: Installation; if you require any; Turn the main disconnect switch OFF.
Liebert RAC2-8 • 37 Section 5: Installation Select a location for the RAC2-8 that is convenient for both operation and cable routing. If the application at your installation is critical, the location should also provide limited access to the controller. The RAC2-8 enclosure is surface mounted using ...
Page 44 - Figure 5–1. RAC2-8 Dimensional Enclosure Diagram
Section 5: Installation Dwg No. 154538 Is su ed: 7/31/97 Figure 5–1. RAC2-8 Dimensional Enclosure Diagram Liebert RAC2-8 • 39
Page 45 - Figure 5–2. RAC2-8 Component Arrangement
Section 5: Installation Dwg No. 154539 Is su ed: 7/31/97 Figure 5–2. RAC2-8 Component Arrangement 40 • User Manual (9/97)
Page 47 - Figure 5–4. RAC2-8 Switch and Jumper Settings
Section 5: Installation Dwg No. 154541 Is su ed: 7/31/97 Figure 5–4. RAC2-8 Switch and Jumper Settings 42 • User Manual (9/97)