Liebert RAC2-8 User Manual

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TABLE OF CONTENTS

SECTION 1: INTRODUCTION

SECTION 2: START UP

....................................................................................................................... 3

SECTION 3: OPERATION

Local..............................................................................................................................................................................5

Sequencing Status Screens.....................................................................................................................................5

Password Screen....................................................................................................................................................6

Main Menu ............................................................................................................................................................6

Status Sub-menu..........................................................................................................................................6

Set Options Sub-menu.................................................................................................................................8

Alarm Sub-menu ....................................................................................................................................... 13

Set Clock Sub-menu.................................................................................................................................. 14

Override 14

Terminal ......................................................................................................................................................................16

Main Menu ..........................................................................................................................................................16

Status Screen.............................................................................................................................................17

Setup Zones/Units Options........................................................................................................................18

Alarms Review and Alarms Clear .............................................................................................................21

Set Clock...................................................................................................................................................21

Override A Unit ........................................................................................................................................22

Set Modem Options...................................................................................................................................23

Setup Temp/Humid Options......................................................................................................................24

Setup Standby Unit Options...................................................................................................................... 25

Display SS Alarm Block ...........................................................................................................................26

Set New Password.....................................................................................................................................26

......................................................................................................... 1

.................................................................................................................. 5

SECTION 4: GLOSSARY OF CONTROL FUNCTIONS ..........................................................27

SECTION 5: INSTALLATION

.......................................................................................................... 37

Liebert RAC2-8 • i

TABLE OF FIGURES

Figure i. Typical System Configuration..........................................................................................................iii

Figure 2–1. Local Control Panel ..........................................................................................................................3

Figure 5–1. RAC2-8 Dimensional Enclosure Diagram ......................................................................................39

Figure 5–2. RAC2-8 Component Arrangement..................................................................................................40

Figure 5–3. RAC2-8 Connection Diagram.........................................................................................................45

Figure 5–4. RAC2-8 Switch and Jumper Settings ..............................................................................................42

ii • User Manual (9/97)

Power Source

120 VAC

Aux Pwr Out

24 VAC, 2A

Terminal

Port

Modem

Port

SiteScan

Liebert

Temp/Humid

Module

(p/n THS28-xx)

Emergency

Power Oper.

Input

Emergency

Power Off

RAC2-8

EIA-232 EIA-232

N.O.

N.C.

N.O.

N.C.

N.O.

N.C.

EIA-422 Twisted Pair

Common Alar m

Output

Humidity Lockout

Relay

Optional Lockout

Relay

Control

Input

UNIT 1

Common

Alarm

Output

Control

Input

Common

Alarm

Output

UNIT 2

Figure i. Typical System Configuration

Control

Common

Input

UNIT 8

Liebert RAC2-8 • iii

Alarm

Output

Section 1: Introduction

See SECTION 5 — INSTALLATION for special

instructions when using the RAC2-8 with Liebert mini-MATE, miniPlus, and DataMate environmental control systems.

MATE

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.

Liebert RAC2-8 • 1

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 panel or

from an optional remote terminal. Refer to SECTION 4 — GLOSSARY OF CONTROL FUNCTIONS and SECTION 3 — OPERATION.

5. Apply power to the unit. Note that the ON/OFF switch is inside the

enclosure.

Figure 2–1. Local Control Panel

Liebert RAC2-8 • 3

4 • User Manual (9/97)

Section 3: Operation

Local

Sequencing Status Screens

This chapter describes how to use the RAC2-8.

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.

With power ON, the following status screens are displayed in sequence.

LIEBERT RAC2-8

TEMP 71.8°F HUM 47%

MO 07-15-96 13:26:55

NO ALARMS PRESENT

STATUS ZONE 1 01-R 02-S

A=ALM S=STBY R=RUN

STATUS ZONE 2 03-R 04-S

A=ALM S=STBY R=RUN

STATUS ZONE 3 05-R 06-S

A=ALM S=STBY R=RUN

STATUS ZONE 4 07-R 08-S

A=ALM S=STBY R=RUN

Liebert RAC2-8 • 5

Sequencing Status Screens (cont’d.)

xx is the number of alarms recorded since alarm history was last cleared. See Alarm submenu.

These functions cannot both be ON at the same time. Select the function required for your installation.

Section 3: Operation

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 through the screens. Press C to resume automatic sequencing. The system returns to the Sequencing Status Screens if no control keys have been pressed during a two minute period.

If alarms are present, the last line of the first screen displayed above reads “ALARMS PRESENT - xx.” Alarm screens are displayed next in the status sequence. Up to 20 alarms can be displayed, 5 screens of 4 alarms each. Alarms are stored in a First In First Out (FIFO) sequence.

Select either Auto Sequencing or Standby Testing from the Set Options Sub-menu.

Password Screen

Main Menu

If the Password function is enabled, you must enter the valid password to access the RAC2-8 Main Menu. At the Enter Password screen, type the established password:

ENTER PASSWORD

Units are shipped from the factory with the Password function disabled. To enable the Password function, press the MENU button to display the Main Menu, then press 2 SETUP. Follow the instructions on page 12 to Set Password.

Press the Menu button to display the Main Menu:

MAIN MENU

1. STATUS 2. SETUP

3. ALARMS 4. SET CLOCK

5. OVERRIDE 6. EXIT

Press 9 to display RAC2-8 revision code and date.

Status Sub-menu

6 • User Manual (9/97)

From the Main Menu, press 1. STATUS to display the Status Submenu:

Section 3: Operation

STATUS MENU

1. UNITS 2. T/H

3. A-DELAY 4. R-DELAY

5. H-DELAY 6. RETURN

1. UNITS

From the Status Sub-menu, press 1. UNITS to display the Unit Status menu:

UNIT STATUS 01-R 02-S 03-R 04-S 05-R 06-S 07-R 08-S A=ALM S=STBY R=RUN

2. T/H

From the Status Sub-menu, press 2. T/H to display the Temperature/Humidity screen:

TEMP 71.8°F HUM 47% STAGING OFF

PUSH CLEAR TO RETURN

3. A-DELAY

From the Status Sub-menu, press 3. A-DELAY to display the Alarm Delays screen:

ALARM DELAYS 0000 0000 0000 0000 0000 0000 0000 0000 PUSH CLEAR TO RETURN

Liebert RAC2-8 • 7

Status Sub-menu (cont’d)

Section 3: Operation

The Alarm Delays screen indicates the time in seconds of an active delay on each unit. Active alarm delays count up while the condition is present and count down if the condition is cleared before the Alarm Delay time elapses.

4. R-DELAY

From the Status Sub-menu, press 4. R-DELAY to display the Restart Delays screen:

RESTART DELAYS 0000 0000 0000 0000 0000 0000 0000 0000 PUSH CLEAR TO RETURN

The Restart Delays screen indicates the time in seconds of an active restart delay on each unit.

5. H-DELAY

From the Status Sub-menu, press 5. H-DELAY to display the Hold Delay screen:

Set Options Sub-menu

Set Options Sub-menu (cont’d)

HOLD DELAY = 0000 PUSH CLEAR TO RETURN

Hold Delay applies to the system rather than to each unit. Therefore, only one number is displayed. This display indicates the time in seconds of an active Hold Delay.

From the Main Menu, press 2. SETUP to display the Set Options Menu:

SET OPTIONS MENU

1. UNITS 2. DELAYS

3. TEMP/HUM 4. STANDBY

5. PASSWORD 6. RETURN

1. UNITS

From the Set Options Sub-menu, press 1. UNITS to display the Set Units menu:

8 • User Manual (9/97)

SET UNITS MENU

1. ZONES/UNITS

2. EMER.OP 3. LABELS

4. SHUTDOWN 5. RETURN

Section 3: Operation

Note that the Clear button will not allow you to exit these screens until all selections have been made.

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.

When you press 1. ZONES/UNITS, the RAC2-8 sequences through the screens you must complete.

SET NUMBER OF ZONES RANGE 1-4 <4> >_

PUSH ENTER FOR NEXT

SET NUMBER OF UNITS ZONE 1 <2> >_

PUSH ENTER FOR NEXT

Set Number of Units screen will be iterated for each zone selected (up to 4).

The RAC2-8 then displays the Set Status screen for Zone 1:

SET STATUS ZONE 1 01-R 02-S

1=RUN O=STBY E=NEXT

Set Status screen is iterated for each zone selected. Press 1, or 0 to set the status. After you have selected the operating status of units in your last zone, Press E to return to the Set Units Menu.

Set Options Sub-menu (cont’d)

From the Set Units menu, press 2. EMER OP. to display the Set Emergency Operating Units ON screen:

SET EMRG.OP UNITS ON 01-R 02-0 03-0 04-R 05-0 06-R 07-0 08-0 1=RUN O=OFF E=NEXT

Beginning with unit 01, set each unit's emergency operating status. Press E to continue to the next unit. When you have configured the last unit, the RAC2-8 returns to the Set Units menu.

From the Set Units menu, press 3. LABELS to display the Assign Labels to Unit screen:

ASSIGN LABEL TO UNIT 1-01 2-02 3-03 4-04 5-05 6-06 7-07 8-08 PUSH ENTER FOR NEXT

Beginning with unit 01, assign a label to each unit. You can use two numbers, two letters, or a two-character number/letter label. Press E to continue to the next unit. When you have configured the last unit, the RAC2-8 returns to the Set Units menu.

Liebert RAC2-8 • 9

Section 3: Operation

From the Set Units menu, press 4. SHUTDOWN to display the Shutdown on Alarm screen:

SHUTDOWN ON ALARM 01-Y 02-Y 03-Y 04-Y 05-Y 06-Y 07-Y 08-Y 1=YES O=NO E=NEXT

Beginning with unit 01, indicate 1 (Yes) or 0 (No) if the unit should shut down on alarm. When you have selected the shutdown status for the last unit, the RAC2-8 displays the Set Units menu.

When you have configured the delays, from the Set Units menu, press 5 to return to the Set Options Menu.

2. DELAYS

SECTION 4 — GLOSSARY OF CONTROL FUNCTIONS

includes a functional description of each delay.

Set Options Sub-menu (cont’d)

From the Set Options Sub-menu, press 2. DELAYS to display the Set Delays menu:

SET DELAYS MENU

1. ALARM 2.HOLD

3. UNIT RESTART

5. RETURN

From the Set Delays menu, press 1. ALARM to configure the Alarm Delay:

ENTER ALARM DELAY <10.0> XX.X MINUTES THEN PUSH ENTER PUSH CLEAR TO RETURN

Enter the desired time for the alarm delay. The default is 10 minutes. Press E to accept the new delay, then press C to return to the Set Delays menu.

From the Set Delays menu, press 2. HOLD to configure the Hold Delay:

10 • User Manual (9/97)

ENTER HOLD DELAY <10.0> XX.X MINUTES THEN PUSH ENTER PUSH CLEAR TO RETURN

Enter the desired time for the hold delay. The default is 10 minutes. Press E to accept the new delay, then press C to return to the Set Delays menu.

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