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........................................................................................
Figure 1.
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.
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.
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.
Figure 2a.
Electrical Connections The MR1 Mini-Remote requires a two-wire connection (fieldsupplied) 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.
Figure 2b.
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 1 2 3 4 OFF Audible beeper enabled Remote on/off disabled. On/off button affects MR1 operation only Optional alarm inputs disabled Common alarm follows alarm condition ON Audible beeper disabled Remote on/off of Env. unit enabled. Env.
Figure 3.
Section 4: OPERATION LCD and Keypad When power is first applied, the MR1 performs selfinitialization 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.
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.
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 al
Alarm 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 AM/AG ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
■ ■ ■ ■ ■ ■ ■ ■ MR1 Mini-Remote Environmental Monitor 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: • 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.
