Liebert MR1 User Manual

S I T E M O N I T O R I N G  
MR1  
Mini-Remote  
Environmental Monitor  
USER MANUAL  
TABLE OF CONTENTS  
Section 1: INTRODUCTION.......................................................................................... 1  
Specifications ................................................................................................................................................ 1  
Section 2: INSTALLATION........................................................................................... 3  
Mounting........................................................................................................................................................ 3  
Electrical Connections................................................................................................................................... 5  
Section 3: HARDWARE CONFIGURATION................................................................. 7  
DIP Switch Settings....................................................................................................................................... 7  
Section 4: OPERATION................................................................................................ 9  
LCD and Keypad ........................................................................................................................................... 9  
Setpoint Control........................................................................................................................................... 10  
TABLE OF FIGURES  
Figure 1. Typical System Configuration ........................................................................................................ii  
Figure 2a. Flush-Mount Installation.............................................................................................................. 4  
Figure 2b. Display Panel Mounted Remotely from Electrical Box................................................................ 6  
Figure 3. Electrical Connections, Electric Box and Display.......................................................................... 8  
Figure 4. LCD Display .................................................................................................................................. 9  
Figure 5. Display Panel .............................................................................................................................. 10  
Figure 1. Typical System Configuration  
Section 1: INTRODUCTION  
The Liebert MR1 Mini-Remote monitors the operating status  
and controls the operation of your Liebert Environmental unit.  
It serves as a remote user interface, supplementing the unit-front  
controls.  
The MR1 is compatible with all Liebert microprocessor-  
controlled Environmental units, including:  
• Deluxe System 3 and Challenger units with  
• Advanced Microprocessor with Graphics  
• Advanced Microprocessor  
• Standard Microprocessor  
• Level 10  
• Level 00  
• Mini-Mate2 ceiling-mounted units  
• Mini-Mate, Mini-Mate Plus and Data-Mate units with  
Small Systems Controllers.  
An LCD display provides temperature, humidity, status and  
alarm information. The MR1 provides both visual and audible  
annunciation of alarms from the Environmental unit. Unmarked  
“hidden” buttons allow the MR1 user to access setpoints and  
settings.  
Specifications  
Electrical Specifications:  
Voltage: 24 VAC, +/-10% of nominal  
Power:  
Phase:  
7.5 VA  
1
Frequency: 50/60 Hz  
Environmental Conditions:  
Operating Temperature:  
5°C to 40°C  
Operating Relative Humidity: 0% to 95% (non-condensing)  
Operating Altitude: up to 2000 meters  
Dimensions:  
Display Panel: 3 1/2”H x 5”W x 1 1/8”D  
89mm x 127mm x 29mm  
0.5 lbs  
0.23 kg  
Electrical Box: 4  
3/4”  
H
x
4
3/4”W  
x
2
3/4”D  
121mm x 121mm x 70mm  
0.91 kg  
Liebert MR1 1  
NOTE  
This equipment has been tested and found to  
comply with the limits for a Class A digital  
device, pursuant to part 15 of the FCC rules.  
These limits are designed to provide reasonable  
protection against harmful interference when the  
equipment is operated in  
a
commercial  
environment. This equipment generates, uses,  
and can radiate radio frequency energy and, if  
not installed and used in accordance with the  
instruction manual, may cause harmful  
interference  
to  
radio  
communications.  
Operation of this equipment in a residential area  
is likely to cause harmful interference in which  
case the user will be required to correct the  
interference at his own expense.  
NOTE  
When the following symbols are displayed, they  
indicate:  
a.  
Earth grounding conductor  
Alternating Current  
b.  
2 User Manual  
Section 2: INSTALLATION  
Mounting  
The MR1 Mini-Remote is completely tested, then shipped from  
the factory disassembled for your convenience during  
installation. To begin flush-mount installation, please refer to  
Figure 2A. An optional 30-foot control cable can be supplied to  
allow the display to be located remotely from the electrical box.  
Refer to Figure 2b.  
The electric box containing the power supply is designed for  
flush-mounting into a finished interior wall. A wall plate is  
supplied to cover the drywall opening, with the display mounted  
directly in front of the wall plate/electric box.  
1. Mount the electric box (Item 5) in the wall at a convenient  
location.  
2. Make each power and unit connection (to Item 4) by  
inserting bare wire end into compression terminal and  
tightening screw. Refer to Electrical Connections section.  
If 30-foot cable is used, disconnect factory wire harness and  
attach cable to screw terminals per Figure 2.  
NOTE: Use minimum  
18 gauge wire for all  
customer interface wiring.  
3. Route control cable through wall plate and electric box  
cover, then connect to electrical box at TB1 (on Item 4).  
4. Attach electric box cover (Item 3) with two (2) screws.  
5. Remove the front cover from the MR1 display panel (Item  
1) by gently prying open at the slots on the top and bottom  
of the display. Attach the control panel rear plastic and the  
wall plate (Item 2) to the electric box with two (2) screws.  
6. Snap display panel front onto the rear plastic part.  
7. Apply power to the MR1. Operate the system to test status  
and alarm monitoring, and customer selected options  
including on/off control. Also test optional customer  
interface (4 inputs and 1 output), if applicable.  
Call Liebert Environmental Support at 1-800-543-2778 if  
assistance is required for the installation or operation of the  
Mini-Remote.  
Liebert MR1 3  
Figure 2a. Flush-Mount Installation  
4 User Manual  
Electrical Connections  
The MR1 Mini-Remote requires a two-wire connection (field-  
supplied) to communicate with the Environmental unit under its  
control. The stranded twisted-pair connects to the MR1 interface  
board at TB2-11 (T+) and TB2-12 (T-). Refer to Table 1 below  
for the connections at the Environmental unit. Note that  
maximum length for RS-422 communications is 1000 feet, and  
minimum of 22 gauge wire should be used for all field wiring.  
Power for the MR1 is supplied to TB3-1 and TB3-2. Maximum  
current draw is 0.3A at 24VAC. It is recommended that the  
MR1 be powered independently from an external 24VAC  
transformer; optionally, it may draw power from the  
Environmental unit. However, if the MR1 is located greater  
than 300 feet (100 meters) from the Environmental unit, an  
external transformer must be used.  
Caution: Ensure Environmental  
unit has sufficient 24VAC power  
to support the MR1, Liqui-tects  
or any other auxiliary device.  
Liebert  
Environmental  
Controller  
24VAC  
Auxiliary  
Power  
Connection to MR1  
TB2-11 (T+)  
TB2-12 (T-)  
SM - Standard  
AM/AG - Advanced  
L10 - Level 10  
Microprocessors  
Terminal T5  
Terminal G5  
Terminal 78 (T+)  
Terminal 77 (T-)  
Terminal 78 (T+)  
Terminal 77 (T-)  
L00 - Level 00  
Microprocessor  
TB1-1  
TB1-5  
-
Mini-Mate 2  
TB4-1 (T+)  
TB4-2 (T-)  
-
SSC - Small System  
Controller  
TB2-1 (T+)  
TB2-2 (T-)  
Table 1: Connection Summary  
The MR1 provides a Common Alarm Output, at TB2-9 and  
TB2-10. This dry-contact is rated for 5A, at 24VDC or  
120VAC.  
There are four optional Customer Alarm inputs that may be used  
on the MR1 (see Hardware Configuration). The inputs are  
triggered by contact-closures, and the contacts are rated for 5A,  
at 24VDC or 120VAC as well. The connection points and  
display mapping are as follows:  
NOTE: New Feature. The inputs  
are now contact-closure –  
24VAC powered inputs are no  
longer necessary.  
Local Alarm 1:  
Local Alarm 2:  
High Water Alarm: TB2-5  
High Head Alarm: TB2-7  
TB2-3  
TB2-1  
&
&
&
&
TB2-4  
TB2-2  
TB2-6  
TB2-8  
NOTE: Exercise caution if  
installing new MR1 as  
replacement unit: remove power  
from signal inputs, or damage to  
unit may occur!  
Liebert MR1 5  
Figure 2b. Display Panel Mounted Remotely from Electrical Box  
6 User Manual  
Section 3: HARDWARE CONFIGURATION  
DIP Switch Settings  
The following user selectable operations are set by DIP SW1 on  
the display panel circuit board: Refer to Table 2 and Figure 3.  
Position  
OFF  
ON  
1
Audible beeper  
enabled  
Audible beeper  
disabled  
2
Remote on/off  
disabled. On/off  
button affects MR1  
operation only  
Remote on/off of  
Env. unit enabled.  
Env. unit must have  
remote on/off  
capability, or MR1  
will not be able to  
perform this function  
3
4
Optional alarm inputs 4 optional alarm  
disabled  
inputs enabled  
Common alarm  
follows alarm  
condition  
Common alarm  
de-energized when  
alarm is silenced  
Table 2: DIP Switch Settings  
Note that factory default is OFF for all four positions.  
Liebert MR1 7  
Figure 3. Electrical Connections, Electric Box and Display  
8 User Manual  
Section 4: OPERATION  
LCD and Keypad  
When power is first applied, the MR1 performs self-  
initialization and then enters the normal display mode. The  
display alternates between showing the temperature and  
humidity readings, and cooling/heating, de/humidification, and  
econocycle operating status.  
Pressing the HOLD button will lock on the temperature or  
humidity reading, continuously updating it two times per second.  
It will continue to display the same parameter until the SCAN  
button is pressed or a new alarm occurs.  
Figure 4. LCD Display  
When you press the SCAN button, the MR1 first scans through  
the active alarms if any exist, then scans through the heating,  
cooling, de/humidification, and econocycle/capacity. On chilled  
water/hot water units, percent capacity indicates the valve  
position. On units equipped with econocycle, cooling will  
reflect the valve position. If econocycle is not available,  
econocycle capacity status is skipped.  
While scanning, the HOLD button can be pressed to lock the  
display on the current item for continuous updating. To return  
to scanning, press the SCAN button again. After all parameters  
have been displayed, the monitor returns to the normal  
alternating status display.  
Should a new alarm occur while scanning (or at any other time),  
the MR1 immediately displays the alarm and annunciates it if  
the beeper is enabled. The alarm can be silenced by pressing the  
SILENCE button. On Small Systems Controls, silencing an  
alarm at the MR1 will also silence the alarm at the unit; on other  
microprocessors, an alarm that is no longer active can be reset  
from the MR1 by pressing the SILENCE button.  
OFF is displayed when the MR1 has been turned off; OFF  
flashes if communication between the MR1 and the  
Environmental unit is disrupted.  
With DIP switch #2 in the ON position and monitoring a unit  
equipped with remote on/off capability, pressing the ON/OFF  
Liebert MR1 9  
button will turn on/off the unit being monitored and the MR1.  
With DIP switch #2 in the OFF position, pressing the ON/OFF  
button will turn toggle the on/off operation of the MR1 only.  
Setpoint Control  
There are two hidden buttons on the MR1 keypad. These  
buttons are not labeled on the display to prevent untrained  
personnel from accessing unit settings.  
Figure 5. Display Panel  
The F/C button will toggle between degrees Fahrenheit and  
degrees Celsius for the temperature display.  
The SET button will put the MR1 in the set mode. The SET  
icon in the upper left of the LCD will be displayed along with  
other icons to indicate which setpoint is being viewed or  
changed. Use the */SCAN and the )/HOLD buttons to change  
the setpoint. The display will change with each key press to  
indicate the new value of the setpoint. If the value does not  
change, then the environmental unit is not accepting the new  
value because it is out of range. The displayed value is always  
the actual setpoint in the environmental unit. There are 8  
setpoints that can be changed. The SET button is pressed to  
advance to the next setpoint. After all 8 setpoints have been  
stepped through, the MR1 will go back to the normal display  
mode. The SILENCE button can be pressed at any time to exit  
the set mode.  
The 8 setpoints are:  
1. Temperature Setpoint  
2. Temperature Sensitivity  
3. Humidity Setpoint  
5. High Temp Alarm  
6. Low Temp Alarm  
7. High Hum Alarm  
8. Low Hum Alarm  
4. Humidity Sensitivity  
Note that the temperature sensitivity is in tenths but there is no  
decimal point on the MR1 display so, for example 1.4 is  
displayed as 14.  
Refer to Table 3 for availability by microprocessor of setpoint  
control:  
10 User Manual  
Setpoint  
On/Off  
Temperature  
Temp Sensitivity  
Humidity  
Humidity Sensitivity  
High Temperature Alarm  
Low Temperature Alarm  
High Humidity Alarm  
Low Humidity Alarm  
AM/AG  
SM  
**  
L10  
L00  
**  
MM2  
SSC  
Table 3: Setpoint Control by Microprocessor  
** Modification to the K3 common alarm relay on the  
microprocessor controls of the Environmental unit is necessary  
to enable remote on/off – this modification will necessarily  
eliminate the common alarm relay output. Refer to the  
Installation / Operations Manual of the Environmental unit, or  
consult Liebert Environmental Support.  
Note that if the high/low temperature and humidity alarm  
setpoints are disabled at the unit controls, then the MR1 will  
display 00 for the setpoint. The MR1 is not able to remotely  
enable alarm setpoints.  
The MR1 will annunciate any alarm transmitted by the  
Environmental controls. Table 4 catalogs the available alarms  
by microprocessor level.  
Liebert MR1 11  
Alarm  
AM/AG  
SM  
L10  
L00  
MM2  
SSC  
High Temperature  
Low Temperature  
High Humidity  
Low Humidity  
High Head Pressure 1  
High Head Pressure 2  
Loss of Airflow  
Liquid Detected  
Change Filters  
Humidifier Problem  
No Water in Hum’fier Pan  
Standby Glycool Unit On  
Compressor 1 Overload  
Compressor 2 Overload  
Main Fan Overload  
Manual Override  
Smoke Detected  
Loss of Water  
Standby Unit On  
Low Suction  
Short Cycle  
Loss of Power  
Inverter Bypass  
Standby Fan On  
Loss of Emergency Power  
Local Alarm [1]  
Local Alarm 2  
Table 4: Alarms by Microprocessor  
12 User Manual  
MR1  
Mini-Remote  
Environmental Monitor  
LIEBERT CORPORATION  
THE COMPANY BEHIND  
THE PRODUCTS  
With more than 500,000 installations around the globe, Liebert  
is the world leader in computer protection systems. Since its  
founding in 1965, Liebert has developed a complete range of  
support and protection systems for sensitive electronics:  
1050 DEARBORN DRIVE  
P.O. BOX 29186  
COLUMBUS, OHIO 43229  
800.877.9222 PHONE  
614.841.6022 FAX  
LIEBERT EUROPE  
LIEBERT ASIA  
Environmental systems: close-control air conditioning  
from 1.5 to 60 tons.  
Power conditioning and UPS with power ranges from 250  
VA to more than 1000 kVA.  
Integrated systems that provide both environmental and  
power protection in a single, flexible package.  
Monitoring and control – on-site or remote – from systems  
of any size or location.  
Service and support, through more than 100 service  
centers around the world, and a 24-hour Customer  
Response Center.  
GLOBE PARK  
MARLOW  
BUCKINGHAMSHIRE SL7 1YG  
UNITED KINGDOM  
+44.1628.403200 PHONE  
+44.1628.403203 FAX  
19/F, CAUSEWAY BAY PLAZA  
489 HENNESSY ROAD  
CAUSEWAY BAY  
HONG KONG  
852.2.572.2201 PHONE  
852.2.831.0114 FAX  
LIEBERT WEB SITE  
While every precaution has been taken to ensure accuracy and  
completeness in this literature, Liebert Corporation assumes no  
responsibility, and disclaims all liability for damages resulting from use of  
this information or for any errors or omissions.  
© 1996 Liebert Corporation. All rights reserved throughout the world.  
Specifications subject to change without notice.  
All names referred to are trademarks or registered trademarks of their  
respective owners.  
SL-31017 (Rev1, 8/99)  
Printed in U.S.A.  

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