Technical data

Guide Specifications for Liebert Mini-Mate2- 5-Ton Systems
38 Liebert
®
Mini-Mate2
™
2.0 Product
2.1 Standard Features/ All Systems
2.1.1 Evaporator Cabinet Construction
The cabinet and chassis shall be constructed of heavy gauge galvanized steel, and shall be serviceable
from one side. Mounting brackets shall be factory-attached to the cabinet. Internal cabinet insulation
shall meet ASHRAE 62.1 requirements for Mold Growth, Humidity & Erosion, tested per UL 181 &
ASTM 1338 standards.
2.1.2 Air Distribution
The fan shall be the centrifugal type, double width, double inlet. The shaft shall be heavy-duty steel
with self-aligning ball bearings with minimum life of 100,000 hours. The fan motor shall be 1750 rpm
(1450 rpm @ 50Hz) and mounted on an adjustable base. The drive package shall be equipped with an
adjustable motor pulley. The fan/motor assembly shall be mounted on vibration isolators.
The evaporator system shall be capable of delivering ____CFM (CMH) at ___ inches (mm) of external
static pressure. The fan motor shall be ____hp (W).
System shall be suitable for ducted air distribution.
2.1.3 Microprocessor Control
The control system shall be microprocessor-based, factory-wired into the system and tested prior to
shipment. The wall-mounted control enclosure shall include a 2-line by 16-character LCD providing
continuous display of operating status and alarm condition. A 7-key membrane keypad for setpoint/
program control and unit On/Off shall be located below the display. The control display shall be field-
wired to the control board using 4-conductor field-supplied thermostat wire.
Temperature and humidity sensors shall be located in the wall box, which shall be capable of being
located up to 300 ft (91.4m) from the evaporator unit.
2.1.3.1 Monitoring
The LCD shall provide On/Off indication, operating mode indication (cooling, heating, humidifying,
dehumidifying) and current day, time, temperature and humidity (if applicable) indication. The
monitoring system shall be capable of relaying unit operating parameters and alarms to the Liebert
SiteScan
®
monitoring system.
2.1.3.2 Control Setpoint Parameters
• Temp. Setpoint 65-85°F (18 to 29°C)
• Temp. Sensitivity 1 to 9.9°F (1 to 5°C)
• Humidity Setpoint 20-80% RH
• Humidity Sensitivity 1-30% RH
2.1.3.3 Unit Controls
2.1.3.3.1 Compressor Short-Cycle Control
The control system shall prevent compressor short-cycling by a 3 minute timer from compressor stop
to the next start.
2.1.3.3.2 Common Alarm and Remote On/Off
A common alarm relay shall be provided to provide a contact closure to a remote alarm device. Two (2)
terminals shall also be provided for remote On/Off control. Individual alarms shall be “enabled” or
“disabled” from reporting to the common alarm.
2.1.3.3.3 Setback Control
The control shall be user configurable to use a manual setpoint control or a programmable time-based
setback control. The setback control will be based on a 5 day/2 day program weekly schedule with
capability of accepting 2 events per program day.
2.1.3.3.4 Temperature Calibration
The control shall include the capabilities to calibrate the temperature and humidity sensors and
adjust the sensor response delay time from 10 to 90 seconds. The control shall be capable of displaying
temperature values in °F or °C.