Technical data

Guide Specifications for Liebert Mini-Mate2—1- and 1.5-Ton Systems
37 Liebert
®
Mini-Mate2
™
2.1.4 Alarms
2.1.4.1 Unit Alarm
The control system shall monitor unit operation and activate an audible and visual alarm in the event
of the following factory preset alarm conditions:
• High Temperature
• Low Temperature
• High Humidity
• Low Humidity
• High Water Alarm - Lockout Unit Operation
• High Head Pressure
• Loss of Power
• Compressor Short Cycle
2.1.4.2 Custom Alarms (2x)
• Humidifier Problem
•Filter Clog
• Water Detected
• Smoke Detected
• Custom Alarm #1
• Custom Alarm #2
User-customized text can be entered for the two (2) custom alarms.
2.1.4.3 Alarm Controls
Each alarm (unit and custom) shall be separately enabled or disabled, selected to activate the
common alarm (except for high head pressure).
2.1.4.4 Audible Alarm
The audible alarm shall annunciate any alarm that is enabled by the operator.
2.1.4.5 Common Alarm
A programmable common alarm shall be provided to interface user selected alarms with a remote
alarm device.
2.1.4.6 Remote Monitoring
All alarms shall be communicated to the Liebert site monitoring system with the following
information: date and time of occurrence, unit number, and present temperature and humidity.
2.2 Chilled Water System Components
2.2.1 Chilled Water Control Valve
The control valve shall be a solenoid-operated, slow-close, spring-return type to reduce water
hammer. Design pressure shall be 300psi (2067kPa) static pressure, with a maximum close-off
pressure of 25psi (172kPa).
(Option) The control valve shall be a motorized, slow-close, non-spring-return type to reduce water
hammer. Design pressure shall be 300psi (2067kPa) static pressure, with a maximum close-off
pressure of 100psi (689kPa).
2.2.2 Chilled Water Coil
The cooling coil shall have a minimum of 2.4 sq.ft. (0.23 sq.m) face area, 2 rows deep. It shall be
constructed of copper tubes and aluminum fins and have a maximum face velocity of ____ ft. per
minute (___ m/s) at ____ CFM (____ CMH). The coil shall be supplied with 45°F (7.2°C) entering water
temperature. The coil shall be supplied with ______ GPM (l/s) of chilled water and the pressure drop
shall not exceed ______ PSI (kPa). The coil assembly shall be mounted in a condensate drain pan with
an internally trapped drain line. The evaporator drain pan shall include a factory-installed float
switch to shut down the evaporator upon high water condition.