Emerson CW089, Design Manual

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117 Liebert
®
CW
™
System Design Manual
4.14 CONDENSATE PUMP, DUAL FLOAT—OPTIONAL
The pump shall have a capacity of 6 GPM (23 l/m) at 20-ft head (58 kPa). (Consult factory for 200V or
230V, 50 Hz applications.) The pump shall be complete with integral dual-float switch, pump, motor
assembly and reservoir. The secondary float shall send a signal to the local alarm and shut-down the unit
upon a high-water condition. The unit shall be shipped loose for field installation on Chilled Water units that
are upflow with bottom return. They are also shipped loose for under-floor field installation on CW026-
CW060 units with EC fans.
4.15 LIEBERT LIQUI-TECT® SENSORS (MAXIMUM OF 2 PER UNIT)—OPTIONAL
Provide ____ (quantity) solid-state water sensors under the raised floor.
4.16 SMOKE SENSOR—OPTIONAL
The smoke sensor shall immediately shut-down the Thermal Management system and activate the alarm
system when activated. The smoke sensor shall be mounted in the electrical panel with the sensing
element in the return-air compartment. The smoke sensor is not intended to function as or replace any
room smoke-detection system that may be required by local or national codes. The smoke sensor shall
include a supervision contact closure.
4.17 LIEBERT SITESCAN® SITE MONITORING SYSTEM—OPTIONAL
Provide a Liebert SiteScan monitoring system with the Liebert CW. The Liebert SiteScan shall have the
capability of monitoring and changing (at the user’s direction) the temperature setpoints and sensitivities of
each unit. The printer shall provide the user with chronological alarm information. It shall also be capable of
being programmed to print out environmental conditions or operating modes at each unit.
4.18 LOW-VOLTAGE TERMINAL PACKAGE INCLUDES:—OPTIONAL
• Remote Shutdown Terminals - 2 additional pairs of terminals provide the customer with additional
locations to remotely shut-down the unit by field-installed devices or controls.
• Extra Common-Alarm Contacts - 2 additional pairs of terminals provide the customer with normally-
open contacts for remote indication of unit alarms.
• Main-Fan Auxiliary Switch - 1 set of normally-open contacts wired to the EC-fan motor contactor will
close when EC-fan operation is required. This set of dry contacts could also be used to initiate air
economizer operation. Air economizer and associated devices by others.
• Liqui-tect Shutdown - 1 pair of dry contacts for the Liqui-tect sensor signal will provide unit shut
down. (Liqui-tect sensor is not included.)
4.19 REHEAT & HUMIDIFIER LOCKOUT—OPTIONAL
The reheat and humidifier lockout includes the necessary relays to disable the reheat and humidifier from
an external customer supplied 24-V signal while on emergency power.
4.20 REMOTE HUMIDITY CONTACT—OPTIONAL
Pair of N/O contacts provided for connection to a remote humidifier that allow the unit's humidity controller
to control a humidifier outside the unit. Power to operate the remote humidifier does not come from the
unit.