DISCONTINUED PRODUCT

CSI 15621 - Mainframe Cooling Systems
Liebert CSU3000
CT(Three Module) Model 20, 30 & 37 ton Mainframe Chiller

GUIDE SPECIFICATIONS
1.0	GENERAL
1.1	SUMMARY
These specifications describe requirements for a mainframe cooling system.  The system shall be designed to provide constant temperature coolant to the mainframe coolant distribution unit.  The manufacturer shall design and furnish all equipment to be fully compatible with heat dissipation requirements of the computer system.
1.2	DESIGN REQUIREMENTS
The mainframe coolant supply unit shall be a Liebert model __________, self-contained, factory assembled system.  Provide units with three, matching, refrigeration systems to provide both primary and redundant sources of chilled water to the mainframe computer system.  The coolant system shall be designed so that two refrigeration systems provide the total cooling capacity required by the mainframe.  The third system serves as a stand-by module.  The three systems shall be totally independent, so that no single component failure shall interrupt coolant flow to the mainframe.
The total cooling capacity of two operating modules shall be__________BTU/HR(kW), based on the entering mainframe coolant temperature of  ______degrees F(C).  These units are to be supplied with _______volt, 3 PH, ___HZ power supply.
1.3	SUBMITTALS
Submittals shall be provided with the proposal and shall include:  Single-Line Diagrams; Dimensional, Electrical, and Capacity data; Piping and Electrical Connection Drawings.
1.4 	QUALITY ASSURANCE
The specified system shall be factory‑tested before shipment. Testing shall include, but shall not be limited to: Quality Control Checks, “Hi‑Pot” Test (two times rated voltage plus 1000 volts, per UL requirements), and Metering Calibration Tests. The system shall be designed and manufactured according to world class quality standards. The manufacturer shall be ISO 9001 certified.

2.0	PRODUCT
2.1	Cabinet and Frame Construction
The frame shall be constructed of heliarc welded tubular steel.  The exterior panels shall be insulated with a minimum 1", 1-1/2 lbs. density fiber insulation.
2.2	Coolant Delivery System
The internal coolant delivery system for each module shall include:  Isolating valves for each module; An expansion tank with fill connection; Pressurization connection and liquid level sight glass; A ____HP circulating pump which shall provide _____GPM (l/s) at _____feet of water (kPa) total head; and a discharge check valve to prevent back flow.
2.3	Coolant Supply and Return Headers
The supply and return connections shall be 2 1/8 in. O.D. copper for connection to RR or ES header assemblies.
2.3.1	(Optional) Header Kit
The CSU3000 shall be provided with a field installed [(RR)(ES)] header kit for connection of [(RR)(ES)] hose kits.

2.3.2	(Optional) Quick-Connect Hose Kits
Provide with the CSU3000 system a complete hose kit capable of connection the system to the CDU of the computer mainframe.  The hose kit shall consist of _________(quantity) flexible hoses, each _______feet in length.  The hoses shall be insulated with Armaflex, type FR insulation or equal and shall contain barbed fittings for connections at the supply and return headers of the chiller and factory made connections on the other end with the proper male and female fittings to connect directly to the CDU.
2.4	Electric Panel
Each chiller module shall have a separate, self-contained high voltage electric panel.  Each electric panel shall include starters, contactors, relays, transformers, and dual element fuses that protect each high-voltage circuit in the system.
2.4.1	Disconnect Switch
Each electric panel shall include a non-automatic, molded-case circuit breaker that can be operated with the panel cover closed.  The disconnect shall include a decorative trim to match the exterior trim of the unit.
2.4.2	(Optional) Locking Disconnect Switch
The non-automatic molded case circuit breaker shall be mounted in the high voltage section of the electrical panel.  The switch shall be accessible from the outside of the unit with the front panel closed.  An additional locking option prevents access to the high voltage electrical components until switched to the "OFF" position.
2.4.3	Common Input Power Electrical Connection
The electric panels shall be wired with one common electrical line connection.
2.4.4	(Optional) Separate Pump Power Connection
Provide one 3-phase power connection for all pumps and controls, and one 3-phase power connection for all other loads.  Six locking disconnects shall be provided on three module units.
2.5	Solid-State Control System
The solid-state control system shall be powered from independent, non-interconnecting 24 volt power sources.  Each chiller module control system shall include the following:  Start/Stop button; Silence button for the audible alarm; Manual reset circuit breakers; backlighted monitor panel (no message is visible until lit).  The monitor panel shall display operating modes (Pump On, Cooling On) in white, and alarm conditions in red.  Alarm messages remain lit until the malfunction is corrected, but the audible alarm may be silenced.  If a second alarm condition occurs, the audible alarm shall sound again.  The alarm panel shall activate upon occurrence of the following conditions:  No Water Flow; Low Water Temperature; High Water Temperature; High Compressor Head Pressure; Loss of Power.  Whenever any of these conditions exist, the control system shall automatically energize the stand-by chiller module and the alarm message "Stand-by On-Other Failed" on the monitor panel. The solid-state plug-in alarm module shall include a Push-to-Test circuit for testing all operating and alarm mode messages as well as the audible alarm.  An individual Push-to-Test button shall be provided to test each alarm condition.  This will verify functionality of the audible alarm, the lights and the switchover to the stand-by module.  A reset button shall reset a module after the malfunction has been corrected. The control system shall also include a set of non-powered, normally open contacts for a remote customer alarm and two custom alarm inputs with customer specified visual messages.
2.5.1	(Optional) Information Gathering Module
Provide an information gathering module that permits communication with a Liebert Sitemaster Model 200 or a Liebert SiteScan.
2.5.2	(Optional) SiteScan Monitoring System
Liebert SiteScan system architecture shall utilize intelligent distributed monitoring/control modules and have the capability to centrally or remotely communicate to one or more workstations.  The system provided will be configured to meet the requirements of the project and shall consist, at a minimum, of a workstation(s), gateway module(s), and monitoring/control module(s).  This system shall also have the capability to directly interface with Liebert information gathering modules (IGMs) found internally to Liebert Environmental, Power and UPS units, or external IGMs to monitor dry or voltage present contacts, space temperature/humidity, water detection cable, and/or power parameters.
2.6	Refrigeration System
Each refrigeration system shall be direct expansion with separate, fully insulated shell and tube evaporator.  All components of the system shall be factory connected with type "L" refrigeration copper tubing.
2.6.1	Refrigeration Module Components
The refrigeration circuit shall include a hot gas muffler, liquid- line filter/drier, refrigerant sight glass and moisture indicator and adjustable, externally equalized expansion valve, liquid-line solenoid valve, hot gas bypass solenoid and valve to control compressor capacity at reduced load.
2.6.2	Semi-Hermetic Compressor
The compressor shall be a semi-hermetic with a suction-gas cooled motor, vibration isolators, thermal overloads, oil sight glass, manual reset high pressure switch, pump-down low pressure switch, suction line strainer, and reversible oil pumps for forced feed lubrication.  The maximum operating speed of the compressor shall be 1750 RPM.  The minimum EER for the compressor shall be_______ at ARI rated conditions (130 degrees Fahrenheit SCT, 45 degrees Fahrenheit SST, and 15 degrees Fahrenheit subcooling).  Compressors shall be suitable for capacity modulation in addition to hot gas bypass systems.
2.6.3	(Optional) Capacity Control Valves
The semi-hermetic compressor shall be equipped with a capacity control valve that shall reduce compressor capacity by unloading one bank of compressor cylinders when activated by the capacity selector switch.  All control circuitry shall be factory installed, and connected.
2.7	Air Cooled Systems
2.7.1	Condenser
Each chiller module shall be provided with a separate Liebert manufactured air cooled condenser. The low profile, slow speed, direct-drive, propeller-fan type condenser shall be designed for vertical air flow.  The condenser shall balance the heat rejection requirements of each module at _____ degrees Fahrenheit.  The condenser shall be constructed of aluminum with a copper tube, aluminum fin coil and include an integral electrical panel. The air cooled condenser shall be powered from the chiller module.
2.7.2	Winter Control System
The winter control system for the air cooled condenser shall be  Liebert "Lee-Temp".  The Lee-Temp system shall allow start-up and positive head pressure control with ambient temperatures as low as -30 degrees Fahrenheit (-34.4 degrees Celcius).  The Lee-Temp package shall include: insulated receiver, pressure relief valve, head pressure three-way control valve, and rotoloc valve for isolating the refrigerant charge.  The Lee-Temp receiver shall be factory insulated and mounted ready for the field connection to the air cooled condenser.
2.8	Water Cooled Systems
2.8.1	Condensers
The water cooled condensers shall be cleanable, shell-and-tube, counterflow with removable heads.  Condensers shall be A.S.M.E. stamped for a maximum refrigerant pressure of 400 psi at 300°F.  The unit shall require ____ GPM of °F of water and have a maximum pressure drop of ____PSI.
2.8.3	(Optional) High Pressure Water Cooled Condenser
The water cooled condensers shall be cleanable, shell-and-tube, counterflow with removable heads.  The condenser shall be A.S.M.E. stamped for a maximum refrigerant pressure of 400 PSI at 300°F, and a maximum water pressure of 300 PSI.  The unit shall require ____ GPM of °F water and have a maximum pressure drop of ____PSI.
2.8.3	Water Regulating Valve
The condenser circuit shall be pre-piped with a head-pressure actuated 2-way regulating valve and a hand operated isolation valve, with a maximum water pressure of (150) (300) psi.
2.8.4	(Optional) Water Regulating Valve
The water regulating valves shall be pre-piped with a head pressure actuated (2-way with bypass)(3-way) regulating valve, with a maximum water pressure of (150) (300) psi.
2.9	Glycol Cooled Systems
2.9.1	Condensers
The glycol cooled condensers shall be counterflow, shell and tube.  It shall be cleanable, with removable heads.  The condensers shall be A.S.M.E. stamped for a maximum refrigerant pressure of 400 PSI at 300°F. The unit shall require ____ GPM of ____ °F water and have a maximum pressure drop of ____ feet of water.
2.9.2	Regulating Valve
The condenser circuit shall be pre-piped with a head-pressure actuated 2-way regulating valve with bypass and a hand operated isolation valve, with a maximum water pressure of (150) (300) psi.

2.9.3	(Optional) Regulating Valve
The water regulating valves shall be pre-piped with a head pressure actuated 3 way regulating valve, with a maximum water pressure of (150) (300) psi.
2.9.4	Drycooler
Each chiller module shall be provided with a separate Liebert- manufactured drycooler. The low profile, direct-drive, propeller- fan type drycooler shall be designed for vertical air flow.  The drycooler shall be designed for an outdoor ambient of _______ degrees Fahrenheit.  The drycooler shall be constructed of aluminum with a copper tube, aluminum fin coil and include an integral electrical panel that contains all the necessary electrical components for both drycooler fans and glycol circulating pump.
2.9.5	Glycol Pump Package
Each drycooler shall be provided with a centrifugal pump mounted in a weatherproof and vented enclosure.  The pump shall be rated for _____GPM at _____ft. of head, and operate on _____ volt, 1 phase  ___ Hz.
2.10	Optional Equipment/All Systems
2.10.1	Floorstand
The floorstand shall be constructed of a heliarc welded tubular steel frame.  The floorstand shall have adjustable legs with vibration isolation pads.  The floorstand shall be _____ inches high.
2.10.2	Liqui-Tect Sensors
Provide _______(quantity) solid-state water sensors for installation under the raised floor.  The field installed sensor shall activate a red "Water under Floor" indicator and the audible alarm.
3.0 EXECUTION
3.1	Installation of coolant unit
3.1.1	General  
Install mainframe coolant units in accordance with manufacturer's installation instructions.  Install units plumb and level, firmly anchored in locations indicated, and maintain manufacturer's recommended clearances.
3.1.2	Electrical Wiring
Install and connect electrical devices furnished by manufacturer but not specified to be factory mounted.  Furnish copy of manufacturers electrical connection diagram submittal to electrical contractor.
3.1.3	Piping Connections
Install and connect devices furnished by manufacturer but not specified to be factory mounted.  Furnish copy of manufacturers piping connection diagram submittal to piping contractor.
3.2	Field Quality Control
Start up mainframe coolant units in accordance with manufacturers start up instructions.  Test controls and demonstrate compliance with requirements.

Included in tech data SL-11700 (R11/97)