Optional Factory-Installed Features-Evaporator/Chilled Water Units; Reheat; Humidifier; Sensors - Vertiv Liebert Mini-Mate2 MMD24E Technical Data Manual

3 OPTIONAL FACTORY-INSTALLED FEATURES—
EVAPORATOR/CHILLED WATER UNITS

3.1 Reheat

Electric Reheat includes 304/304 stainless steel finned tubular reheat elements, with high limit safety
switch.
SCR Electric Reheat uses an SCR controller and unit control software to provide full cooling with
modulating of the electric reheat elements to control air temperatures. Reheat capacity is up-sized to
offset the cooling capacity. (The SCR Electric Reheat is not available on chilled water, free-cooling or 575V
units.)
Hot Water Reheat includes hot water coil, 2-way solenoid valve and Y-strainer.
NOTE: This option is available only on Chilled Water units, but not with other reheat options.

3.2 Humidifier

The Canister Humidifier includes a steam-generating type humidifier with automatic flushing circuit, inlet
strainer, drain, 1" (25.4mm) air gap on fill line and solenoid valves. Humidifier problem alarm annunciates at
the wall-mounted display panel.
Remote Humidifier Contact allows the unit's humidity controller to control a humidifier outside the unit.
Power to operate the remote humidifier does not come from the Liebert Mini-Mate2. Available on units
with or without internal humidifier.

3.3 Sensors

Smoke Sensor checks return air, shuts down the unit upon sensing smoke and activates visual and
audible alarms at the wall-box display. This smoke sensor is not intended to function as or replace any
smoke sensor system that may be required by local or national codes.
High-Temperature Sensor senses the return air temperature and shuts down unit if the temperature
reaches 125°F (52°C). This device is not meant to replace any fire detection system that may be required
by local or national codes.

3.4 Switches and Motors

Filter Clog senses pressure drop across the filters and activates visual and audible alarms at the wall-box
display. The wall-box display annunciates the alarm and flashes a notification upon reaching a customer
setpoint.
A Factory-Installed Non-Fused Disconnect Switch allows unit to be turned off for maintenance. A
disconnect switch is standard for the evaporators, chilled water units and indoor condensing units, but
these units may be specified without the switch.
Direct-Drive blower can be factory-eliminated from the evaporator/chilled water cabinet for high static
applications (0.9 to 1.5in. [23 to 38mm] w.g.). See Ship-Loose Accessories—Field-Installed on page 13 for
the optional, externally mounted high static blower assembly.
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