Liebert Mini-Mate2—2- and 3-Ton
SL-10535a_ REV5_2-17
8
Guide Specifications
The SCR (Silicon Controlled Rectifier) controller shall proportionally control the reheat elements to
maintain the selected room temperature. The rapid cycling made possible by the SCR controller provides
precise temperature control, and the more constant element temperature improves heater life. The unit
microprocessor control shall operate the SCR controller, while cooling is locked on. The capacity of the
reheat coils shall be ______ BTU/HR (kW), with input voltage of ______ V. Not available on chilled
water or free-cooling units.
2.4.5 Disconnect Switch, Non-Locking
The non-automatic, non-locking, molded case circuit interrupter shall be factory mounted in the
high-voltage section of the electrical panel. The switch handle shall be accessible from the unit front and
mounted on:
_______ the evaporator/chilled water unit
_______ the indoor air-cooled centrifugal condensing unit
_______ the water/glycol condensing unit
2.4.6 High-Temperature Sensor
The high-temperature sensor shall immediately shut down the system when high temperatures (125°F,
51.7°C) are detected. The high-temperature sensor shall be mounted with the sensing element in the
return air.
2.4.7 Smoke Sensor
The smoke sensor shall immediately shut down the Thermal Management system and activate the alarm
system when activated. The sensing element shall be located in the return air compartment. This smoke
sensor shall not function or replace any room smoke detection system that may be required by local or
national codes.
2.4.8 Filter Clog Switch
The filter clog switch senses pressure drop across the filters and shall annunciate the controller upon
exceeding the adjustable setpoint.
2.4.9 Free-Cooling-Dual Cooling Coil
A free-cooling coil shall be integral to the evaporator cabinet, and shall be constructed of copper tubes
and aluminum fins. The coil shall be rated at ______ BTU/HR (kW) sensible cooling capacity with a
45°F (22°C), ___% glycol solution. The coil shall require ______ GPM (l/s) and the total unit pressure
drop shall not exceed ______ feet of water (kPa) when in the free cooling mode. Free-cooling shall be
activated by a temperature stat and shall include factory-piped three-way valve and separate supply and
return piping.
Coil shall be designed for closed-loop applications using properly treated and circulated fluid. Not
available with SCR reheat. An optional Cu-Ni coil shall be required to prevent premature corrosion if
applied to open water tower loop.
A heat exchanger and pump shall be field-supplied to isolate the open water tower loop from the free-
cooling loop.
2.5
SHIP-LOOSE ACCESSORIES
2.5.1 Remote Sensors
The unit shall be supplied with remote temperature and humidity sensors. The sensors shall be connected
to the unit by a ______ ft. (m) shielded cable.
Summary of Contents for Liebert Mini-Mate2
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