Emerson Liebert Challenger 3000 Technical data

DISCONTINUED
PRODUCT
Precision Cooling
For Business-Critical Continuity
Liebert Challenger™ 3000
Technical Data Manual - Floor Mounted Systems, Nominal 3 & 5 Ton Systems, Air Cooled, Water/Glycol
Cooled, GLYCOOL, Chilled Water, Split Systems, 50 & 60 Hz

NOTE
Tables i, ii and iii show nomenclature for the complete range of all available product options.
Not all combinations are possible. For assistance, contact your local dealer, Liebert
representative or call 1-800-543-2778.







 
 

 















 




 
 






















































































































DISCONTINUED
PRODUCT

 
 

 
 
 
 
 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 

  

  

 

DISCONTINUED
PRODUCT

Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Unit configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Unit configurations, continued. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Microprocessor control systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Optional Views With Advanced Graphics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Upflow GLYCOOL Challenger 3000 with front return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Chilled water Challenger 3000 downflow with top return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Air cooled condenser with Lee-Temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Outdoor propeller fan condensing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Upflow GLYCOOL Challenger 3000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Cabinet and floor planning dimensional data—Upflow (BU/BK) models . . . . . . . . . . . . . . . . . . . 32
Cabinet and floor planning dimensional data—Downflow (BF/BE) models . . . . . . . . . . . . . . . . . 33
Cabinet and floor planning dimensional data—3-ton centrifugal fan condensing unit . . . . . . . . 34
Cabinet and floor planning dimensional data—Split system—5-ton centrifugal fan
condensing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Cabinet and floor planning dimensional data—Split system—3-ton water/glycol cooled
condensing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Cabinet and floor planning dimensional data—Split system—5-ton water/glycol cooled
condensing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Cabinet and floor planning dimensional data—Split System—Propeller fan condensing
unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Cabinet and floor planning dimensional data—Propeller fan condensing modules—Vertical
air discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Cabinet and floor planning dimensional data—Self-contained system—Air cooled condenser
or drycooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Cabinet and floor planning dimensional data—Piggyback condenser. . . . . . . . . . . . . . . . . . . . . . 37

DISCONTINUED
PRODUCT




  
 
  
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Table 10
Table 11
Table 12
Table 13
Table 14
Table 15
Table 16
Table 17
Table 18
Table 19
Table 20
Table 21
Table 22
Table 23
Table 24
Table 25
Table 26
Table 27
Table 28
Table 29
Table 30
Condensate pump capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Challenger 3000 air cooled data—60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air cooled data—50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water cooled data—60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water cooled data—50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glycol Cooled/GLYCOOL Data—60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Challenger 3000 electrical data—60 Hz1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self-contained with SCR reheat * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scroll compressor and main fan (for comparison purposes only) * . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor condensing units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor condensing units, air cooled *. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor condensing units, water cooled * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan speed control condensers * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lee-Temp condensers *. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lee-Temp receiver heater pads for use w/CSL condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drycooler & pump package - 95°F (35°C) ambient *. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drycooler only - 95°F (35°C) ambient * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pumps * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Challenger 3000 electrical data—50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scroll compressor and main fan (for comparison purposes only) . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor condensing units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor condensing units air cooled. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self-contained with SCR reheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor condensing units water cooled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan speed control condensers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lee-Temp condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lee-Temp receiver heater pads; for use w/CSL condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drycooler & pump package - 35°C (95°F) ambient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drycooler only - 35°C (95°F) ambient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DISCONTINUED
PRODUCT
14
18
20
22
24
26
38
39
39
39
40
40
40
40
40
40
40
40
41
42
42
42
42
42
42
42
42
42
42
42

DISCONTINUED
PRODUCT


For sensitive electronics, environmental control is
more than simple cooling. “Comfort” air conditioning
systems are designed for the comfort of people and
simply cannot provide the kind of environment
required by high performance computer or communication equipment.


In short, today’s electronics need the same precision
environmental control that mainframe computers
need. The difference is that instead of one large computer room there are several small, often crowded
rooms, widely dispersed throughout a building, plant
or campus. Conditions and requirements can vary
widely.
A clean environment of properly filtered air is essential. Build-up of dust and fibers attracted by operating electronics can cause faults and impair the
operation of electromechanical devices, such as
switches and disk drives.
The high density heat load in a computer room
or other similar application is beyond the
capacity of ordinary air conditioning systems.
Sensitive electronics are best maintained in a stable
environment of 72°F ±2°F (22.2°C ±1°C). Because
computers and communications equipment generate
large quantities of heat in small areas, six to 10
times the heat density of normal office space, the air
conditioning system must have more than just
enough cooling capacity. It must have the precision
to react quickly to a drastic change in heat load and
prevent wide temperature fluctuations—something a
large building system cannot do.

Comfort conditioning systems cannot be relied upon
24 hours per day 365 days per year. They are typically designed to operate 10 hours per day, from
spring to autumn. Many “comfort” systems have no
provision for winter operation. A precision environmental control system is designed for operation at
temperatures down to -30°F (-34.4°C).


The electronic equipment must be protected
from both internal condensation and static
electricity discharges.
Standard 60 Hz
units are UL
listed and CSA
(NRTL-C) certified. NRTL-C
meets both U.S.
and Canadian
government safety requirements, providing fast, hassle-free inspection and building code approvals. The
units are also MEA listed for New York City applications.
Maintaining the correct humidity level in the room is
just as important as maintaining proper temperature. When humidity is too high, condensation may
form inside electronic equipment and damage it. If
humidity is too low, static electricity could disrupt
operation or even shut down the electronic system.
An ordinary building system cannot normally control
the environment within these boundaries.

Computers and other sensitive electronics require
greater air volumes than ordinary air conditioning
can provide. Typical comfort systems are designed to
provide between 300 and 400 CFM (cubic feet per
minute), (500–700 CMH) per ton of cooling. Computer systems require between 500 and 600 CFM
(850–1020 CMH) per ton. The high density heat load
in a relatively small space requires more changes of
air than a less dense “comfort” application.
While a normal office space requires only two air
changes per hour, a room filled with electronic equipment requires up to 30 changes per hour. Without
proper air volume, hot spots and temperature fluctuations could develop within the room. Also, greater
air volumes provide the higher sensible heat ratios
required by electronic computer equipment.

DISCONTINUED
PRODUCT



Data processing power is moving from the specialized environment of the computer room to the office
and the factory floor.
GLYCOOL is a patented Liebert process that can significantly reduce energy costs during periods of low
outdoor ambient temperatures.
At the same time, the applications are growing exponentially. From yesterday’s spreadsheets and word
processors, micro- to mid-range computers control
LANs and WANs, manage complex telecommunications systems, optimize manufacturing processes and
facilitate sophisticated testing and laboratory functions.
Computers and sensitive electronics tend to be
grouped, often in specialized rooms. This makes
operation and service easier, but it also creates the
need for precision environmental control—the coordinated management of temperature, humidity and air
filtration.
The GLYCOOL system is a normal glycol system
with the addition of a second cooling coil in the air
handling unit and a three-way valve. During colder
months, the glycol solution returning from the outdoor drycooler is routed to the second coil, and
becomes the primary source of cooling for the room.
At ambient temperatures below 35°F (1.6°C), the
cooling capacity is sufficient to handle the total cooling needs of the room. As the compressor is responsible for the majority of the power consumption of the
air conditioning unit, a GLYCOOL system can substantially reduce energy costs.


Challenger 3000 provides the precision and flexibility required by a broad range of applications.
•
•


Microprocessor-based controls (with a choice of
monitoring systems based on your needs) allow
you to select temperature and humidity ranges.
A-frame coil (oriented to airflow) provides a large
cooling surface area, and more precise control of
temperature and humidity.


Though electronic equipment rooms share some common protection requirements, their application
requirements can vary greatly. The room may or may
not have a raised floor or an existing heat rejection
loop. Budget and space requirements may limit the
options a contractor has.
The Challenger 3000 is available in 10 different configurations, with upflow and downflow air distribution options.


The Challenger 3000 occupies 7 square feet
(.65 square meters) of floor space. It can be located in
a corner of the room or against a wall, as all service
access is from the front of the unit. With room floor
space valued at a premium per square foot, the small
footprint of the Challenger 3000 makes economic
good sense.

DISCONTINUED
PRODUCT









DISCONTINUED
PRODUCT

Two levels of microprocessor control systems are
available providing precise control and monitoring of
the critical space.

The Advanced Microprocessor is standard, and
the Advanced Microprocessor with Graphics is
optional. The main control functions are similar for
both controls.
•
•
•

The user must enter a three-digit password before
making changes.
•
•
•
•
•
•
•
•
Temperature Setpoint 65-85°F (18-29°C)*
Temperature Sensitivity +1-10°F (0.6-5.6°C)
Humidity Setpoint 20-80% RH*
Humidity Sensitivity 1-30% RH
High Temperature Alarm 35-90°F (2-32°C)
Low Temperature Alarm 35-90°F (2-32°C)
High Humidity Alarm 15-85% RH
Low Humidity Alarm 15-85% RH

•
•
* The microprocessor may be set within these ranges;
however, the unit may not be able to control to
extreme combinations of temperature and humidity.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Factory set-up for Intelligent Control which uses
“fuzzy logic” and “expert systems” methods. Proportional and Tunable PID are user selectable options.

•
•
•
•
Compressor short cycle control: Prevents
compressor short-cycling and needless compressor wear.
System auto restart: The auto restart feature
will automatically restart the system after a
power failure. Time delay is programmable.
Sequential Load Activation: On initial start-up
or restart after power failure, each operational
load is sequenced to minimize total inrush current.
Hot Water / Econ-O-Coil Flush Cycles: Hot
water reheat coils and Econ-O-Coils are periodically flushed to prevent a build-up of contaminants.
Temperature/Humidity Sensor Calibration:
The sensors may be calibrated from the front monitor panel to insure that all units in the room are
similarly calibrated, assuring greater precision.

•
•
•
Alarm history log: The Advanced Microprocessor displays the 10 most recent alarms. The
Advanced Microprocessor with Graphics displays
the most recent 60 alarms. Both provide a time
and date stamp for each event
Run time log: Displays run time and hours for
major components (also allows reset of run
hours) including compressors, GLYCOOL, fan,
humidifier, and reheat.


•
Input diagnostics: Reviews inputs to the control system.
Control board diagnostics: Initiates a self-test
of the control system.
Output diagnostics: Tests major components
by turning them on and off from the control
panel. Includes: main fan, compressor, liquid line
solenoid valve, hot gas bypass valve, chilled
water or chilled GLYCOOL valve, R-5 relay,
reheat, hot water reheat valve, humidifier,
humidifier make-up valve, and common alarm.
Humidifier problem
High head pressure
Change filter
Loss of air flow
High temperature
Low temperature
High humidity
Low humidity
Compressor overload (opt)
Main fan overload (opt)
Low suction pressure
Short cycle
Loss of power
Custom alarm (choose up to 4)
• Water under floor
• Smoke detected
• Standby GC pump on
• Loss of water flow
• Standby unit on
• User customized text
Normal display: Includes present room temperature and humidity, active functions (cooling,
heating, dehumidifying), and any alarms.
Operating status: Displays each control operation in percent.
Read analog inputs function: Displays the
present values of up to four analog inputs.

DISCONTINUED
PRODUCT










•
•
•
Individual plots of temperature, humidity and
the four analog inputs.
Bar graph plots of individual component run history by hour.
Floor plan of optional water detection system
layout including on alarm.
Status indication of operating modes with current
temperature and humidity.









DISCONTINUED
PRODUCT



The frame, 14 gauge, MIG welded tubular and
formed steel, provides maximum support while 1"
(25.4mm) deep steel panels with 1-1/2 lb. (.68 kg)
insulation protect and quiet the system. The front
door can be opened for service without shutting off
the system. All components are accessible for service/
maintenance through the front of the unit.
The two-stage 304 stainless steel reheat elements
are a rigid, fin-tubular design that have extended
operation life. The reheat has ample capacity to
maintain room dry-bulb conditions during a system
call for dehumidification. The two stages give an
accurate, controlled response to the requirements of
the computer room. The low watt density, electrically
enclosed elements are surrounded by the tube and
fins, reducing sheath temperatures and eliminating
ionization.
Liebert enhances the Challenger 3000’s resistance to
corrosion by applying a black, powder-coat finish to
all frame components. Exterior panels are similarly
protected with durable powder-coating.


The standard pleated 2" (51mm) filter with an efficiency of 20% (based on ASHRAE 52.1) can be
changed quickly and easily through the front of the
unit.
The high voltage compartment contains the contactors, transformers and overloads and all other highvoltage components.
Each high voltage component is protected by a separate overcurrent protective device. The entire high
voltage panel is enclosed by a safety lock dead front
panel. When the front door is opened by operating
personnel, the high voltage components remain
enclosed for operator safety.









The Challenger 3000 features a quiet, low speed fan
assembly with double inlet blower, lifetime lubrication and self-aligning ball bearings. The motor and
variable pitch drive are mounted on an adjustable
base. The entire blower/ motor assembly is mounted
on vibration isolators for smoother operation.




The draw-through design of the fan section provides
even air distribution across the coil, controlled air for
bypass humidification, elimination of air bypass
around the filters and low internal cabinet pressure
drop.



High-intensity quartz lamps over the stainless steel
humidifier pan permit clean, particle-free vapor to be
added to the air within 5 to 6 seconds of the electronic call from the microprocessor control.
The quartz lamps provide radiant energy that evaporates water in a pure state, without solids.



The Infrared Humidifier is equipped with an automatic water supply system that significantly reduces
cleaning maintenance. This system has an adjustable water over-feed to prevent mineral precipitation. A drain valve is provided to easily empty the
humidifier pan prior to inspection or servicing. A
control valve regulates flow at water pressures
between 5 and 150 psig (34.5 and 1034 kPa) and
includes a Y-strainer.




DISCONTINUED
PRODUCT










The chilled water cooling coil is designed for closedloop applications using properly maintained water. It
is constructed of copper tubes and aluminum fins. Aframe coils are used on downflow units and V-frame
coils are used on upflow units. To ensure quality, the
coil is manufactured to the highest standards in the
industry.





The flow of chilled water through the cooling coil is
controlled by an electronic modulating motor. The
microprocessor control will activate the motor when
a need for cooling or dehumidification exists. The
motor will position the valve to precisely match the
needs of the conditioned space.


All chilled water piping within the Challenger 3000
is fully insulated to assure full system capacity and
prevent condensation.

The fully insulated control valve gives the conditioned space the precise cooling needed by electronic
equipment. Its unique design requires no overtravel
linkages and never requires adjustment.









The flow switch will activate the alarm system and/
or shut down the system should the chilled water
supply be interrupted. The switch is factory wired
and mounted in the chilled water valve compartment.

For special applications, a high pressure, modulating
3-way or 2-way valve can be provided. The valve is
designed for 400 psig (2758 kPa) water pressure.

DISCONTINUED
PRODUCT

Two versions are available:
1. Self-Contained Systems
2. Split Systems



The heart of the refrigeration system is the compressor.
All self-contained evaporator units and split system
condensing units contain a high efficiency, quiet
operating scroll compressor. The compressors have
internal vibration isolating mountings, pressure
safety controls and built-in overload protection.

These systems feature a scroll compressor and controls, expansion valve, hot gas bypass and evaporator
coil in the room unit.
Air Cooled models also include a crankcase heater
on the compressor and require field connection to
remote air cooled condenser.
Water, Glycol and GLYCOOL models also include
a coaxial condenser with field connections required
to the water or glycol coolant loop.
Water/Glycol models have 2-way WRV with bypass.
GLYCOOL models have 3-way WRV.

The evaporator coil is designed for the high sensible heat
ratio required by electronic equipment applications. The
copper tube, aluminum fin coils are configured as Aframe coils on downflow units and V-frame coils on
upflow units for smooth air flow through the unit.


These pre-charged systems feature the evaporator
coil and expansion valve in the room unit, with the
scroll compressor, and the condensing equipment
located in one of several different types of condensing
units. Pre-charged line sets are available on 3-ton
systems.
Every Challenger compressor has a high pressure
switch with an exclusive manual reset after high
pressure cut-out. This prevents cycling the compressor at high pressure, resulting in greater efficiency
and longer compressor life.

The externally equalized thermostatic expansion
valve smoothly controls the flow of refrigerant
through the coil and provides precise control of
superheat.

DISCONTINUED
PRODUCT

DISCONTINUED
PRODUCT







The compressor pump-down control is accomplished
by a liquid-line solenoid valve used in conjunction
with a low pressure switch.
The Lee-Temp winter control system’s heated receivers permit startup and positive head pressure control
at ambient temperatures as low as -30°F (-34.4°C).
The Lee-Temp package includes insulated receiver, a
pressure relief valve, three-way head pressure control valves, and rotalock valves (see Figure 7 below).

The Liebert manufactured low profile, direct drive
propeller fan type air cooled condenser provides
quiet, efficient operation.

It is constructed of aluminum with a copper tube and
aluminum fin coil for corrosion resistance. An integral, factory wired and tested control panel reduces
installation time.
The Series PB condenser converts the Challenger
3000/Lee-Temp system into a self-contained package
when an outdoor location is not practical.

Quiet-Line Condensers can help your facility meet
the strictest noise codes, and do so at less cost than
traditional condensers with acoustical shielding.

The winter control system features a variable speed
motor and a specially designed solid-state fan speed
control transducer.
The transducer senses refrigerant pressure and varies the speed of the fan motor to maintain constant
condensing temperature and system capacity. This
system permits operation at ambient temperatures
as low as -20°F (-29°C).







DISCONTINUED
PRODUCT




This unit is available in these optional configurations:

•
The centrifugal condensing unit may be connected to
the evaporator section by means of pre-charged
refrigeration lines (3 ton only). This greatly simplifies installation and keeps installation costs low. The
copper-tube, aluminum-fin coil is equipped with low
temperature controls to assure year-round operation
to -20°F (-29°C). The condensing unit is completely
factory wired, charged and tested and is ready for
final connections.
•
105°F (40°C) ambient for high ambient conditions.
95°F (35°C) ambient Quiet-Line for low noise
level conditions below 58 dBa.


Factory installed non-fused disconnect switch
allows unit to be turned off for maintenance. Disconnect switch is available on indoor condensing units
only.
The centrifugal fan condensing unit includes scroll
compressor, condenser coil, centrifugal blower
assembly, high-pressure switch, Lee-Temp head
pressure control.

(3 ton only): Consists of one pre-charged liquid line
and one pre-charged insulated suction line of soft
copper tubing. Each line has one male quick-connect
coupling and one female quick-connect coupling with
an access valve connection.
Condensing unit has hot gas bypass standard feature
which bypasses hot gas around the compressor
directly to the suction side of the compressor to provide capacity control and reduce compressor cycling.
System includes liquid injection valve to maintain
proper suction superheat.
Available in 15 ft. (4.6m) and 30 ft. (9.1m) lengths for
interconnection of remote located condenser module.
Maximum recommended distance between evaporator and condenser modules with pre-charged line sets
is 45 ft. (13.7m). For longer runs, use sweat adapter
kit.
Unit must be mounted indoors. Duct flanges are provided.

The air cooled condensing unit can be mounted on
the roof or a ground level site. The condensing unit
housing is manufactured of galvanized steel with a
powder coat finish. The copper-tube, aluminum-fin
coil is equipped with low temperature controls to
assure year-round operation to -30°F (-34.4°C). The
condensing unit is completely factory wired, charged
and tested and is ready for final connections. (See
illustration below)

(3 ton only): Contains two suction and two liquid line
compatible fittings that allow field-supplied interconnecting refrigerant lines to be used.
The standard prop fan condensing unit includes
scroll compressor, prop fan, high head pressure
switch, hot gas bypass and Lee-temp head pressure
control (for operation down to -30°F (-39°C) ambient.)



DISCONTINUED
PRODUCT







A co-axial condenser provides ample capacity to handle the heat rejection needs of the system while using
a minimum of liquid and low total pressure drop.
The high pressure option for the condenser circuit
consists of a 2-way or 3-way water regulating valve
and condenser rated at 350 psig (2413 kPa) water
pressure. This option is required in applications with
large static heads.

Head pressure operated regulating valves accurately
control the condensing temperature and maintain
system capacity for various entering liquid flow rates
and temperatures. Two-way valves with bypass are
standard.


Allows unit to be turned off for maintenance. Disconnect switch is available on indoor condensing units
only.



Consists of one pre-charged liquid line and one precharged insulated suction line of soft copper tubing.
Each line has one male quick-connect coupling and
one female quick-connect coupling with an access
valve connection.

Three-way valves provide accurate control of condensing temperature and thus maintain constant
system capacity while also keeping the condenser
water flow rate constant.
Available in 15 ft. (4.6m) and 30 ft. (9.1m) lengths for
interconnection of remote located condenser module.
Maximum recommended distance between evaporator and condenser with pre-charged line sets is 45 ft.
(13.7m). For longer runs, use sweat adapter kit.

The high pressure option for the condenser circuit
consists of a regulating valve and a condenser rated
at 350 psig (2413 kPa) water-pressure. This option is
required in applications with large static head pressures.

(3 ton only) - contains two suction and two liquid line
compatible fittings that allow field-supplied interconnecting refrigerant lines to be used.

A compressor crankcase heater is available to prevent the migration of refrigerant to the compressor
during off cycles.




The hot gas reheat assembly consists of a 3-way
directional solenoid operated valve and a hot gas
reclaim coil.

The Liebert manufactured Fan Speed Control drycooler is constructed of aluminum and features copper tubes and aluminum fin design. It is low profile,
propeller fan type and provides quiet, trouble free
heat rejection. The drycooler features a variable
speed fan motor and a specially engineered solid
state fan speed transducer. The transducer senses
the temperature of the leaving glycol and modulates
the speed of the fan to maintain proper glycol temperatures. An integral, factory-wired and tested control panel reduces installation time.



Factory charged and sealed, the water cooled condensing unit is ready to be installed quickly and easily. The counter-flow coaxial condenser with two-way
or three-way regulating valve designed for 150 psi
(1034.3 kPa) is matched to the heat rejection requirements of the compressor for a variety of flow rates
and fluid temperatures.

Condensing unit has a hot gas bypass standard feature that bypasses hot gas around the compressor
directly to the suction side of the compressor to provide capacity control and reduce compressor cycling.
System includes liquid injection valve to maintain
proper suction superheat.
The glycol system includes a matching centrifugal
glycol pump. It is mounted in a vented, weatherproof
enclosure.
Optional Equipment—See page 13.

DISCONTINUED
PRODUCT



The Liebert manufactured drycooler is constructed of
aluminum with a copper tube aluminum fin coil. The
low profile design features multiple direct drive propeller type fans, balanced to the heat rejection load.
An integral, factory wired and tested control panel
reduces installation time.
The Liebert GLYCOOL free-cooling system is integrated with a glycol cooled Challenger 3000.
At outdoor temperatures below 35°F (1.6°C), the
GLYCOOL coil is capable of providing total system
capacity. At outdoor temperatures between 35° and
65°F (1.6° and 18.3°C), the unique modulating valve
permits partial cooling of the space by the GLYCOOL coil with the DX system picking up the rest of
the load. Above 65°F (18.3°C) the unit functions as a
glycol unit and all the cooling is accomplished by the
DX system. When cooling is required, the three-way
modulating valve and water regulating valve direct
glycol (from the heat rejection loop) to the
Econ-O-Coil located upstream of the evaporator coil,
to the condenser, or to both.
The GLYCOOL system contains all the standard features of a glycol cooled system plus the following.






A solid-state temperature monitor compares the room
air temperature and entering glycol temperature.
When air temperature is higher than glycol temperature, the monitor communicates to the microprocessor control that “free-cooling” is available.

The GLYCOOL coil is strategically located in the
return air stream of the environmental control system.
This coil is designed for closed-loop applications using
properly treated glycol solutions.

The air is first filtered before entering the coil and
then is either precooled or totally cooled before entering the refrigeration coil. The glycol flow to the coil is
controlled by a pre-piped modulating three-way
valve. When supplied with a 45°F (7.2°C) glycol solution, the coil is sufficiently sized to offer the identical
cooling capacity as is obtained during the refrigeration cycle of the compressor.





For high pressure applications, the GLYCOOL system can be equipped with components rated at 300
psig (2069 kPa).


The GLYCOOL Three-Way Control Valve opens full
anytime the temperature of the glycol solution is below
room temperature, to take full advantage of all possible free cooling. As the outdoor ambient drops, the
three-way control valve modulates the flow to the
GLYCOOL coil. It maintains constant temperature in
the room and includes operating linkage and electronic
motor. Unlike other valves of this nature, there is no
over travel linkage or end switches to be adjusted.
The dual pump package features two full size glycol
pumps, each capable of providing sufficient flow for
system operation. A flow switch will sense the loss of
flow, should the lead pump fail, and automatically
command the standby pump to start. The complete
system includes dual pump housing, pumps, lead-lag
switch and flow switch (for field installation). The
dual pump package provides redundancy, protecting
against costly downtime in the computer room.


A head pressure operated glycol regulating valve
accurately controls the condensing temperature and
system capacity for various entering glycol temperatures. The valve has three-way action.
Quiet-Line Drycoolers can help your facility meet the
strictest noise codes, and do so at less cost than traditional drycoolers with acoustical shielding.

DISCONTINUED
PRODUCT



The condensate pump, mounted in the bottom of
most units, is used for condensate water only.
The remote temperature/ humidity sensors permit
monitoring room conditions from an external source.
They are encased in an attractive case and are provided with a plug compatible shielded cable in virtually any length.
Complete with
sump, motor and
pump assembly
and automatic
control.

The disconnect operating handle protrudes
through the front of the
system for easy access.
Meets NEC codes.
Standard model
has single float.
A dual float condensate pump
which includes
connections to
unit, common
alarm, unit shutdown and one customer N/O contact is also available.



The locking disconnect
switch, mounted in the
electrical panel, is connected to the safety lock

dead front panel of the

system and is interlocked mechanically. In
this way the panel can’t be opened until the switch is
in the off position. And it complies with local codes as
well as those of the NEC.


































Available in heights from 9" to 24" (228.6 to
609.6mm) in 3" (76.2mm) increments, adjustable +11/2" (38.1mm). Allows for installation and connection
of the Challenger 3000 prior to installation of the
raised floor. A modular, field-installed turning vane
can be added to the floor stand.

Clean, pure steam is generated in a disposable canister that is complete with supply and drain valves,
electronic controls and steam distributor. The
humidifier is provided with an automatic flush cycle
to lengthen service life. An indicator on the Challenger 3000 monitor panel is activated when the canister should be changed.

DISCONTINUED
PRODUCT


NOTE
Some options or combinations of options
may result in reduced air flow. Consult
factory for recommendations.
The smoke detector senses the return air, shuts
down the unit upon detection, and sends visual and
audible alarm. Dry contacts are available for a
remote customer alarm. This smoke detector is not
intended to function as or replace any room smoke
detection system that may be required by local or
national codes.

This reheat uses stainless steel elements and also
includes the necessary sensors and controls to provide variable heat output to help maintain tighter
control of room conditions, especially in lightly
loaded applications. (Contact factory for available
voltages.) Direct expansion units only.
Supervised smoke detectors are also available as an
option. Consult factory.

The firestat senses return air temperature of the system. Upon sensing high temperatures, the environmental control system is shut down. Required by
codes in certain areas.

Four optional filters are available in lieu of standard
package. A 4" (102mm) 20%, 30%, 40%-45% or
60%-65% filter may be specified. (Efficiency based on
ASHRAE 52.1). 2" (51mm) 20% pre-filters may also
be specified.


These 16 ga. panels include heavy duty gaskets to
provide satisfactory system operation when located
outside the conditioned space in less-than desirable
environments.

These blower/motor packages are available on upflow
models where external static pressures are up to
2.0 inches (500 Pa) on 60 Hz units, and up to
1.5 inches (370 Pa) on 50 Hz units. These blowers are
rigidly mounted for ducting directly to the blower
housing.

Controlled by a 2-way solenoid valve from the microprocessor control panel, these economical reheats
have the capacity to maintain dry bulb conditions
when the system is calling for dehumidification. The
system is completely pre-piped and includes a control
valve and Y-strainer. The reheat coil is constructed
of copper tubes and aluminum fins.
(Consult the factory for specific applications.)

These motors replace the standard efficiency motors
to provide increased energy savings during operation
(consult factory for specific efficiencies).

Standard height of 18" (457mm) with top duct connection or 2-way, 3-way or 4-way grille discharge
styles available.


DISCONTINUED
PRODUCT

You will find a full range of monitoring and control
systems, communications modules designed to interface Liebert equipment with a variety of building
management systems, plus stand-alone monitoring,
control and leak detection devices.
OpenComms Nform
•
•
•

SiteScan Web is a comprehensive critical systems
monitoring solution dedicated to ensuring reliability
through graphics, event management and data
extrapolation. The standard Web interface allows
users easy access from anywhere at anytime.
• Single- and multi-site applications.
• Event management and unit control.
• Trend and historical data captures and reporting.
• Full ASHRAE BACnet compatibility.
• Java based.
• Windows 2000 and XP compatible.
SiteLink
• Connectivity to building management systems
using Modbus and BACnet.
Site I/O
• Integrates sensors and contacts.
Site TPI
• Integrates non-Liebert equipment.
•
•


Autonomous microprocessor controlled modules are
available to provide supervision, control and remote
notification of Liebert equipment. These stand-alone
devices include:
Contact Closure Alarm Panels
• Continuously monitor critical support equipment
and instantly notify on alarm condition.
Autochangeover Control Panels
• Sequence the operation of multiple environmental units.
Leak Detection Modules
• Provide quick detection and location of hazardous fluid leaks.
Discrete Output Interface Card
• Straightforward way to tie environmental units
to a building management system or alarm
panel.

The OpenComms™ family of products leverages oneto-one unit connections and your existing network for
a comprehensive monitoring solution for distributed
equipment.
OpenComms NIC
• Monitoring option available for Liebert precision
air conditioning units.
• Web interface for viewing and control.
• Modbus interface for building management systems.
• SNMP interface for network management systems.

Centralized monitoring of all Liebert SNMP
enabled devices.
Event and alarm management.
Adaptable and configurable graphical user interface.
Integration of third-party SNMP enabled devices
through custom Liebert services.
Windows NT, 2000 and XP compatible.




DISCONTINUED
PRODUCT



SiteScan Web is a monitoring solution for critical
environments that utilize a facility-view approach.
The system enables communications from Liebert
environmental and power units—as well as many
other pieces of analog or digital equipment to a front
end software package that provides monitoring, control and alarm management.
SiteScan monitoring gives you decision making
power to effectively manage the equipment that is
critical to your business. Designed with flexibility for
large, complex systems as well as smaller, single-site
facilities, the Liebert SiteScan line of products can
provide real-time status and alarms.


Up to eight environmental units
can be automatically and centrally controlled for emergency
switching and to balance unit
runtime. The AC3 controls two
or three units. The RAC2-8 controls two through eight units
and has the ability to provide
alarm notification to pagers.

The Universal Monitor keeps personnel
on-site and at remote
locations apprised of
the status of equipment through local
alarming and remote
paging services. The
panel will interface
with anything that


closes an electrical
contact and any device
with a 4-20mA signal. To improve process efficiency
and troubleshooting, the panel tracks data in an
alarm log, an event log and a trend log. The Universal Monitor has a local LCD interface and a remote
dial-up interface.

The microprocessor-based module provides two-way
communication between an existing building management system and up to 12 Liebert units via MODBus or BACnet.

OpenComms Nform centralizes the management of
your distributed Liebert network equipment. OpenComms Nform software solution combines full-scale
monitoring with the use of the existing network
infrastructure—so the cost of dedicated, out-of-band
communications cabling is eliminated. It is both scalable and adaptable so it can grow as your systems
expand and needs change. OpenComms Nform will
monitor any Liebert SNMP device that supports a
network interface, such as the OpenComms Web
Card and the OpenComms Network Interface Card.
Authenticated alarm management and event notification ensures that alarms are detected and acted
upon, which allows problems to be quickly resolved.

Zone detectors with
cable or single point
detectors provide
fast and accurate
indication of water in
you critical space.


These systems com

municate with your
unit or with a separate monitoring system. Area
water detection cable with distance measurement
and monitoring protects your entire room. This system quickly and accurately calculates and displays
the location of water on the cable, allowing you to
promptly fin and correct a leak.

The OpenComms Network Interface Card (OC-NIC)
and OpenComms Web Card (OC-Web Card) provide
Ethernet connectivity for Liebert equipment. Operating status and alarms are communicated via the network to external systems utilizing industry standard
open protocols.

The Environmental Discrete Outputs Card
(ENV-DO) provides 16 discrete outputs, corresponding to status and major alarm conditions. These
Form-C contact closures provide a straightforward
means to connect Liebert Environmental units to
Building Management Systems (BMS), I/O or alarm
panels.

A seven-day temperature and
humidity recorder permits close
examination of computer room
environment condition and can
be used as a permanent record
of the environmental control
system’s operation efficiency.
The system includes pens, 100
recording charts; two bottles of recording ink (1 red
ink and 1 blue ink).

LEDs display customized alarm indication for any
dry contact input including alarms for Liebert environmental, power and UPS systems. The RCM4
monitors and displays four dry contact points.

DISCONTINUED
PRODUCT













     
 


  
  

  
  

  
  

  
  

  
  

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  
  

  
  
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  
  
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  
  
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  
  
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


      














 

 


DISCONTINUED
PRODUCT













































     

































































































































   


DISCONTINUED
PRODUCT

































            
            

            
            

            
            

            
            

            
            


 
 


  
  


  
  


 
 


  
  


  
  


 
 


  
  


  
  


 
 


  
  


  
  


 
 
  
  


  
  


 
 

 
 

 
 

 
 

 
 




     



















































 






      














 

 


DISCONTINUED
PRODUCT






































































































































































   


















DISCONTINUED
PRODUCT













 








 







 








 







 








 







 








 







 








 







 









 







 








 







 








 







 








 







 








 







 














































































 

 


DISCONTINUED
PRODUCT

































































































































































DISCONTINUED
PRODUCT























 







 








 

















 







 








 

















 







 














































































































































































 

 


DISCONTINUED
PRODUCT































































































































































DISCONTINUED
PRODUCT













    




      

 


      
 

       

 


      
 

       

 


      
          

 


      
 

       

 


      
          


 


    


 


    



 


    


 


    



 


    


 


    



 


    


 


    



 


    


 


    




 





























































  

















 

 


 


DISCONTINUED
PRODUCT












    
























 


  














































































 










































  


























































DISCONTINUED
PRODUCT









    
          

          
 
        

          
 
        

          
          

          
 
        

          
          


 

  

  

 

  

  


 

  

  

 

  

  


 

  

  

 

  

  


 

  

  

 

  

  


 

  

  

 

  

  



 



























































    














 
  



 


 


DISCONTINUED
PRODUCT








   















































































   







































































































































 

DISCONTINUED
PRODUCT





  


  








 




  

  




 




  

  




 




  

  




 




  

  




 





  

  




 




  

  




 




  

  




 




  

  




 




  

  




 


 




  



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

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

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



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









 





































 

 



























 



DISCONTINUED
PRODUCT






 













 















 















 















 















 
















 















 















 















 















 


























 





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



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
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





 


 





 




































 


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
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

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

















DISCONTINUED
PRODUCT

 










































DISCONTINUED
PRODUCT

 


































DISCONTINUED
PRODUCT

 





    
    





 

 






 




DISCONTINUED
PRODUCT

 









 










DISCONTINUED
PRODUCT

 

   



  


    
    
    






 








 





 

  
     



DISCONTINUED
PRODUCT

 



 






DISCONTINUED
PRODUCT




















       
 





    




       
    




       
 




















    




       
    




       
 




















    




       
    




       
 





















    




  
   

    




       
 




















    




  
    
    




       
 




















    




  
    
    




       
 















 





    




       
    




       
 




















    




       
    




       
 




















    




       
    




       
 





















  














  














 




















  














  














 




















  









  


   








   

 















 
 





DISCONTINUED
PRODUCT













        














































 


        
        
        



        
        
        



        
        
        














































 

        
        
     
  



        
        
     
  



        
        
     
  












        

        
        










































     
  
        



     
  
        



        
        


DISCONTINUED
PRODUCT












































































 






















 






















































































































 



   










































































DISCONTINUED
PRODUCT
























 








 












 







































 












 































 








 











 








































 











 































 



 




DISCONTINUED
PRODUCT







     






  



 


  



 


  




 
  



 




 







  
  












 


  






 


































  










  













 







     


  

 


     

 

 







 





  




 










 


 
 















 
 































 






 


  
 

  

















     

 

 

 

 





 




 

 















DISCONTINUED
PRODUCT






The environmental control system shall be a Liebert
Challenger 3000 factory assembled unit. Standard 60
Hz units shall be UL listed and CSA (NRTL-C) certified. It shall be specifically designed for service from
the front of the unit. The system shall be designed for
draw-through air arrangement to insure even air distribution to the entire face area of the coil.
Submittals shall be provided with the proposal and
shall include: Single-Line Diagrams; Dimensional,
Electrical, and Capacity data; Piping and Electrical
Connection Drawings.









The Advanced control processor shall be microprocessor based with a front monitor LCD display panel
and control keys for user inputs. The controls shall
be menu driven with on-screen prompts for easy user
operation. The system shall allow user review and
programming of temperature and humidity setpoints, alarm parameters, and setup selections
including choice of control type. A password shall be
required to make system changes. For all user selections, the range of acceptable input (temperature,
humidity, or time delay) shall be displayed on the
monitor screen. The system shall provide monitoring
of room conditions, operational status in % of each
function, component run times, date and time, and
four analog inputs from sensors provided by others.
Control
The control system shall allow programming of the
following room conditions:
Temperature Setpoint 65 to 85°F (18-29°C)
Temperature Sensitivity +1 to +9.9°F (0.6 to
5.6°C) in 0.1° increments
Humidity Setpoint 20 to 80% RH
Humidity Sensitivity +1 to +30% RH
All setpoints shall be adjustable from the individual
unit front monitor panel. The microprocessor can be
set within these ranges, however, the unit may not
be able to control to extreme combinations of temperature and humidity.



The filter shall be____ inches (mm) thick and rated
not less than _____ % (20%, 30%, 40-45%, 60-65%)
efficiency based on ASHRAE 52.1.
Prefilter (Optional)
The prefilter shall be 2 in. (50.8mm) thick with an
efficiency of 20% based on ASHRAE 52.1.
Each system shall be capable of handling ____ CFM
(CMH) at ____inches (mm) of water external static
pressure with (down discharge air flow) (up discharge air flow with front return or up discharge airflow with rear return) pattern. It shall have a total
cooling capacity of ____ BTU/HR (kW), sensible cooling capacity of ____ BTU/HR (kW), based on the
entering air condition of °F (°C) dry bulb, and ____ °F
(°C) wet bulb. These units are to be supplied with
____ Volt, ____ phase, ____ Hz power supply. The
humidifier shall have a capacity of ____ lbs/hr (kg/h).
Reheat shall have a capacity of _____ BTU/HR (kW).
The main fan shall be ____ HP (kW).


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 span of
100,000 hours.
The fan motor shall be 1750 RPM and mounted on an
adjustable base. The drive package shall be sized for
200% of the fan motor horsepower, and equipped
with an adjustable motor pulley. The fan/motor
assembly shall be mounted on (vibration isolators)
(solid base). The fan shall be located to draw air over
the coil to ensure even air distribution and maximum
coil performance.
High Efficiency Motor (Optional)
The fan motor shall be a ____ HP (kW) high efficiency motor with a full load efficiency of ____ %.
These specifications describe requirements for an
environmental control system. The system shall be
designed to maintain temperature and relative
humidity conditions within the room. The manufacturer shall design and furnish all equipment to be
fully compatible with heat dissipation requirements
of the site.


The frame shall be constructed of MIG welded tubular and formed steel. All frame components shall be
finished in a black, powder-coat finish to protect
against corrosion. The exterior panels shall be
(20 gauge)/(18 gauge) steel and shall be powder
coated with ____ color paint. The panels shall be
insulated with a minimum 1 in. (25.4mm), 1-1/2 lbs.
(0.68 kg) density fiber insulation. Front and side
panels shall have captive, 1/4 turn fasteners.
The cabinet shall be designed so that all components
are serviceable and removable from the front of the
unit.

DISCONTINUED
PRODUCT
Custom alarms are four customer accessible alarm
inputs to be indicated on the front panel. Custom
alarms can be identified with prepared (programmed) alarm labels for the following frequently
used inputs:
Water Under Floor
Smoke Detected
Standby GC Pump On
Loss of Water Flow
Standby Unit On
User customized text can be entered for two of the
four custom alarms. Each alarm (unit and custom)
can be separately enabled or disabled, selected to
activate the common alarm, and programmed for a
time delay of 0 to 255 seconds.
Audible Alarm
The audible alarm shall annunciate any alarm that
is enabled by the operator.
Common Alarm
A programmable common alarm shall be provided to
interface user selected alarms with a remote alarm
device.
Remote Monitoring
All alarms shall be communicated to the Liebert
monitoring system with the following information:
date and time of occurrence, unit number, and
present temperature and humidity.
Analog Inputs
The system shall include four customer accessible
analog inputs for sensors provided by others. The
analog inputs shall accept a 4 to 20 mA signal. The
user shall be able to change the input to 0 to 5 VDC
or 0 to 10 VDC if desired. The gains for each analog
input shall be programmable from the front panel.
The analog inputs shall be able to be monitored from
the front panel.
Diagnostics
The control system and electronic circuitry shall be
provided with self-diagnostics to aid in troubleshooting. The microcontroller board shall be diagnosed
and reported as pass/not pass. Control inputs shall
be indicated as on or off at the front monitor panel.
Control outputs shall be able to be turned on or off
from the front monitor panel without using jumpers
or a service terminal. Each control output shall be
indicated by an LED on a circuit board.
Temperature and Humidity Sensors shall be capable
of being calibrated using the front monitor panel controls to coordinate with other temperature and
humidity sensors in the room.
Predictive Humidity Control
The microprocessor shall calculate the moisture content in the room and prevent unnecessary humidification and dehumidification cycles by responding to
changes in dew point temperature.
Compressor Short-Cycle Control
The control system shall include a program to prevent compressor short-cycling.
System Auto-Restart
For start-up after power failure, the system shall
provide automatic restart with a programmable (up
to 9.9 minutes in 6-second increments) time delay.
Programming can be performed either at the unit or
from the central site monitoring system.
Sequential Load Activation
During start-up, or after power failure, the microprocessor shall sequence operational load activation to
minimize inrush current. Systems allowing multiple
loads to start simultaneously are unacceptable.
Chilled Water/Hot Water/Econ-O-Coil Flush
Cycles
Chilled water, hot water, and Econ-O-Cool coils (if
unit is so equipped) shall be automatically flushed to
prevent the buildup of contaminants. Systems without this feature shall include the necessary devices to
bypass fluid into the coil on a programmed basis.
Front Monitor Display Panel
The microprocessor shall provide a front monitor
LCD backlit display panel with 4 rows of 20 characters with adjustable contrast. This display (along
with five front mounted control keys) shall be the
only operator interface required to obtain all available system information such as room conditions,
operational status, alarms, control and alarm setpoints, and all user selections including alarm
delays, sensor calibration, DIP switch selections, and
diagnostics. All indicators shall be in language form.
No symbols or codes shall be acceptable.
Alarms
The microprocessor shall activate an audible and
visual alarm in event of any of the following conditions:
High Temperature
Low Temperature
High Humidity
Low Humidity
Short Cycle
Compressor Overload (Optional)
Main Fan Overload (Optional)
Humidifier Problem
High Head Pressure
Change Filter
Loss of Air Flow
Low Suction Pressure
Loss of Power
Custom Alarm (#1 to #4)
Data Collection
The control system shall maintain accumulative
operating hours of compressor, reheat, humidifier,
fan motor, and Econ-O-Coil. The ten most recent
alarms shall also be retained.
Communications
The microprocessor shall be compatible with all Liebert remote monitoring and control devices.

DISCONTINUED
PRODUCT



Chilled Water/Hot Water/Econ-O-Coil Flush
Cycles
The optional Advanced control processor shall be
microprocessor based with a front monitor dot matrix
display panel and control keys for user inputs. The
controls shall be menu driven with on-screen
prompts for easy user operation. The system shall
allow user review and programming of temperature
and humidity setpoints, alarm parameters, and
setup selections including choice of control type. A
password shall be required to make system changes.
For all user selections, the range of acceptable input
(temperature, humidity, or time delay) shall be displayed on the monitor screen. The system shall provide monitoring of room conditions, operational
status in % of each function, component run times,
date and time, and four analog inputs from sensors
provided by others.
Chilled water, hot water, and Econ-O-Cool coils shall
be automatically flushed to prevent the buildup of
contaminants. Systems without this feature shall
include the necessary devices to bypass fluid into the
coil on a programmed basis.
Front Monitor Display Panel
The microprocessor shall provide a front monitor 240
x 120 dot matrix display panel with adjustable backlighting. This display (along with five front mounted
control keys) shall be the only operator interface
required to obtain all available system information
such as room conditions, operational status, graphical data, alarms, control and alarm setpoints, and all
user selections including alarm delays, sensor calibration, DIP switch selections, and diagnostics. All
indicators shall be in language form. No symbols or
codes shall be acceptable.
Control
The control system shall allow programming of the
following room conditions:
Temperature Setpoint 65 to 85°F (18-29°C)
Temperature Sensitivity +1 to +9.9°F (0.6 to
5.6°C) in 0.1° increments
Humidity Setpoint 20 to 80% RH
Humidity Sensitivity +1 to +30% RH
All setpoints shall be adjustable from the individual
unit front monitor panel.
Temperature and Humidity Sensors shall be capable
of being calibrated using the front monitor panel controls to coordinate with other temperature and
humidity sensors in the room.
Alarms
The microprocessor shall activate an audible and
visual alarm in event of any of the following conditions:
High Temperature
Low Temperature
High Humidity
Low Humidity
Short Cycle
Compressor Overload (Optional)
Main Fan Overload (Optional)
Humidifier Problem
High Head Pressure
Change Filter
Loss of Air Flow
Low Suction Pressure
Loss of Power
Custom Alarm (#1 to #4)
Custom alarms are four customer accessible alarm
inputs to be indicated on the front panel. Custom
alarms can be identified with prepared (programmed) alarm labels for the following frequently
used inputs:
Water Under Floor
Smoke Detected
Standby GC Pump On
Loss of Water Flow
Standby Unit On
User-customized text can be entered for all four custom alarms. Each alarm (unit and custom) can be
separately enabled or disabled, selected to activate
the common alarm, and programmed for a time delay
of 0 to 255 seconds.
Predictive Humidity Control
The microprocessor shall calculate the moisture content in the room and prevent unnecessary humidification and dehumidification cycles by responding to
changes in dew point temperature.
Compressor Short-Cycle Control
The control system shall include a program to prevent compressor short-cycling.
System Auto-Restart
For start-up after power failure, the system shall
provide automatic restart with a programmable (up
to 9.9 minutes in 6-second increments) time delay.
Programming can be performed either at the unit or
from the central site monitoring system.
Sequential Load Activation
During start-up, or after power failure, the microprocessor shall sequence operational load activation to
minimize inrush current. Systems allowing multiple
loads to start simultaneously are unacceptable.
Audible Alarm
The audible alarm shall annunciate any alarm that
is enabled by the operator.

DISCONTINUED
PRODUCT
cally flush deposits from the humidifier pan. The
system shall be field adjustable to change the cycle
time to suit local water conditions. The humidifier
shall have a capacity of _____ lbs/hr (kg/h).
Common Alarm
A programmable common alarm shall be provided to
interface user selected alarms with a remote alarm
device.
Remote Monitoring

All alarms shall be communicated to the Liebert site
monitoring system with the following information:
date and time of occurrence, unit number, and
present temperature and humidity.
The environmental control system shall be equipped
with a steam generating humidifier that is controlled
by the microprocessor control system. It shall be
complete with disposable canister, all supply and
drain valves, steam distributor, and electronic controls. The need to change canister shall be annunciated on the microprocessor control panel. The
humidifier shall have a capacity of ____ lbs/hr (kg/h).
Analog Inputs
The system shall include four customer accessible
analog inputs for sensors provided by others. The
analog inputs shall accept a 4 to 20 mA signal. The
user shall be able to change the input to 0 to 5 VDC
or 0 to 10 VDC if desired. The gains for each analog
input shall be programmable from the front panel.
The analog inputs shall be able to be monitored from
the front panel.


The low-watt density, 304/304, stainless steel,
finned-tubular electric reheat coils shall be capable
of maintaining room dry bulb conditions when the
system is calling for dehumidification. The reheat
section shall include UL approved safety switches to
protect the system from overheating. The capacity of
the reheat coils shall be ____ BTU/HR (kW), ____ kW,
controlled in ____ stage(s).
Diagnostics
The control system and electronic circuitry shall be
provided with self-diagnostics to aid in troubleshooting. The microcontroller board shall be diagnosed
and reported as pass/not pass. Control inputs shall
be indicated as on or off at the front monitor panel.


The hot water reheat coil shall have copper tubes
and aluminum fins with a capacity of _____ BTU/HR
(kW) when supplied with _____ °F (°C) entering
water temperature at _____GPM (l/s) flow rate. Maximum pressure drop shall be _____ PSI (kPa). The
control system shall be factory pre-piped with a
2-way motorized control valve and cleanable
Y-strainer.
Control outputs shall be able to be turned on or off
from the front monitor panel without using jumpers
or a service terminal. Each control output shall be
indicated by an LED on a circuit board.
Data Collection
The control system shall maintain accumulative
operating hours of compressor, reheat, humidifier,
fan motor, Econ-O-Coil, and heat rejection. The sixty
most recent alarms shall also be retained.
 
The SCR (Silicon Controlled Rectifier) controller
shall proportionally control the stainless steel
reheats 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 capacity of the reheat coils shall be _____
BTU/HR (kW).
Graphing
The control shall display the following graphical
data:
Temperature, humidity, analog inputs
Component operating status by hour
Operating status
 
Communications
The floor stand shall be constructed of a heliarcwelded tubular steel frame. The floor stand shall be
coated using an autodeposition process to protect
against corrosion. The floor stand shall have adjustable legs with vibration isolation pads. The floor stand
shall be: 9 in. (23cm), 12 in. (30cm), 15 in. (38cm), 18
in. (46cm), 21 in. (53cm), 24 in. (61cm) high.
The microprocessor shall be compatible with all Liebert remote monitoring and control devices.



The humidifier shall be of the infrared type consisting of high intensity quartz lamps mounted above
and out of the water supply. The evaporator pan
shall be stainless steel and arranged to be serviceable without disconnecting water supply lines, drain
lines or electrical connections. The complete humidifier section shall be pre-piped ready for final connection. The infrared humidification system shall use
bypass air to prevent over-humidification of the controlled space. The auto flush system shall automati-
 
The turning vane shall be designed to mount in the
factory supplied floor stand and direct air either to
the front or rear of the unit.

DISCONTINUED
PRODUCT
 
valve, filter drier, refrigerant sight glass and moisture indicator.
The unit shall be supplied with a (2 way) (3 way) (4
way) (ducted) air discharge plenum. The plenum
shall be 18 in. (457mm) high, insulated and powder
painted the same color as the room unit.

Pump Down Control
A liquid line solenoid valve shall be provided for
pump down control.
 

Crankcase Heater
The manual disconnect switch shall be mounted in
the high voltage section of the electrical panel. The
switch shall be accessible with the door closed.
A crankcase heater shall be provided for additional
system protection from refrigerant migration during
off cycles.
 

Propeller Fan Condenser (Standard)
The Liebert manufactured air cooled condenser shall
be the low profile, slow speed, direct-drive, propellerfan type. The condenser shall be constructed of aluminum and contain a copper tube, aluminum fin coil
with an integral electric control panel. The system
shall be designed for _____ °F (°C) ambient. The air
cooled condenser shall have a _____ Volt, _____ phase,
____ Hz power supply.
The manual disconnect switch 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 door closed, and prevent access to the high
voltage electrical components until switched to the
“OFF” position.
 
The unit shall be supplied with remote temperature
and humidity sensors. The sensors shall be connected to the unit by a 30 ft. (9m), 60 ft. (18m), 90 ft.
(27m), 120 ft. (36m), 150 ft. (45m) shielded cable.
Fan Speed Control (FSC) Head Pressure Control (Standard)
The winter control system for the air cooled condenser shall be Liebert Fan Speed Control (FSC).
The variable speed motor shall turn on at 10% of the
supply voltage and modulate in response to head
pressure to a full speed of 1050 RPM. It shall be
designed with ball bearings, permanent lubrication,
and internal overload protection.
 
The firestat shall immediately shut down the system
when high temperatures are detected. The firestat
shall be mounted in the electrical panel with the
sensing element in the return air.
 
The control system shall be complete with transducers, thermostats and electrical control circuit, factory
prewired and tested in an integral control panel. The
transducer shall automatically sense the head pressure of the compressor and control the variable speed
fan on the air cooled condenser to properly maintain
the head pressure.
The smoke detector senses the return air, shuts
down the unit upon detection, and sends visual and
audible alarm. Dry contacts are available for a
remote customer alarm. This smoke detector is not
intended to function as or replace any room smoke
detection system that may be required by local or
national codes.
The fan speed control system shall provide positive
start-up and operation in ambient temperature as
low as -20°F (-29°C). Included with the fan speed
control system shall be a solid state winter start kit
as an integral feature of the electronic control panel.
 
The condensate pump shall have the capacity of ____
GPH (l/h) at ____ ft. (m) head @ ____ V - ____ Hz. It
shall be complete with (single) (dual) integral float
switch, pump, motor assembly, and reservoir.


Lee-Temp Head Pressure Control (Optional)


The winter control system for the air cooled condenser shall be “Lee-Temp.” The Lee-Temp system
shall allow startup and positive head pressure control with ambient temperatures as low as -30°F
(-34.4°C). The Lee-Temp package shall include: insulated receiver, pressure relief valve for each circuit,
head pressure three-way control valve, and rotalock
valve for isolating the refrigerant charge. The LeeTemp receiver shall be factory insulated and
mounted ready for the field connection to the air
cooled condenser. The Lee-Temp heater shall be (150)
(300) _____ Watt and require a separate power supply of (115) (230) _____ Volt, single phase, _____ Hz.
Direct Expansion Coil
The evaporator coil shall have _____ sq.ft. (sq. m) face
area, _____ rows deep. It shall be configured as (A)
(V) frame and be constructed of copper tubes and aluminum fins and have a maximum face velocity of
_____ ft. per minute (m/s) at _____ CFM (CMH). The
coil shall be provided with a stainless steel drain pan.
Refrigeration System
The refrigeration system shall consist of a high efficiency scroll compressor, hot gas bypass, pressure
safety switches, externally equalized expansion

DISCONTINUED
PRODUCT
Piggyback Condenser (Optional)
Hot Gas Reheat (Optional)
The system shall be supplied with a piggyback condenser (PB). The condenser shall be constructed of
steel with frame coated using the autophoretic® process, and panels powder coated to protect against
corrosion. The coil shall be copper tube with aluminum fins. The heavy duty fan shall be the centrifugal
type, double width, double inlet. The 1750 RPM
(1450 RPM @ 50 Hz) fan motor shall be mounted on
an adjustable base, and equipped with an adjustable
motor pulley. A Liebert Lee-Temp head pressure control system shall be integral with the unit. The system shall be designed for -30°F (-34.4°C) ambient.
The air cooled condenser shall have a _____ Volt,
3 phase, _____ Hz power supply.
The complete hot gas reheat system shall include a
copper tube, aluminum fin coil, three-way solenoid
valve, and refrigerant check valve. The capacity of
the coil shall be _____ BTU/HR (kW).

Propeller Fan Drycooler (Standard)
The Liebert manufactured drycooler shall be the low
profile, slow speed, direct drive propeller fan type.
The drycooler shall be constructed of aluminum and
contain a copper tube aluminum fin coil with an integral electric control panel. The drycooler shall be
designed for _____ °F (°C) ambient.
Centrifugal Fan Drycooler (Optional)
Centrifugal Fan Condenser (Optional)
The system shall be supplied with a centrifugal fan
drycooler (LCD). The drycooler shall be constructed of
galvanized steel with a copper tube, aluminum fin coil.
The heavy duty fan shall be the centrifugal type, double width, double inlet. The 1750 RPM (1450 RPM @
50 Hz) fan motor shall be mounted on an adjustable
base, and equipped with an adjustable motor pulley. A
3-way control valve and thermostat shall maintain the
desired fluid temperature. Electrical controls shall be
in a rain-tight enclosure. The system shall be designed
for _____ °F (°C) ambient. The drycooler shall have a
_____ Volt, 3 phase, _____ Hz power supply.
The system shall be supplied with a centrifugal fan
condenser (LCC). The condenser shall be constructed
of galvanized steel with a copper tube, aluminum fin
coil. The heavy duty fan shall be the centrifugal type,
double width, double inlet. The 1750 RPM (1450
RPM @ 50 Hz) fan motor shall be mounted on an
adjustable base, and equipped with an adjustable
motor pulley. A Liebert Lee- Temp head pressure
control system shall be field piped to the unit. Electrical controls shall be in a rain-tight enclosure.
The system shall be designed for _____ °F (°C) ambient. The air cooled condenser shall have a _____ Volt,
3 phase, _____ Hz power supply.

Single Glycol Pump Package (Standard)
This system shall be provided with a centrifugal
pump mounted in a weatherproof and vented enclosure. The pump shall be rated for _____ GPM (l/s) at
_____ ft. of head (kPa), and operate on _____ Volt,
3 phase, _____ Hz.



The water/glycol system shall be equipped with a coaxial condenser having a total pressure drop of _____ ft.
of water (kPa) and a flow rate of _____ GPM (l/s) with
_____ °F (°C) entering water/glycol temperature.
Dual Glycol Pump Package (Optional)
The dual pump package shall include pumps, enclosure, and field mounted flow switch. The pumps
shall be wired to the drycooler control box which
includes a lead/lag switch for the pumps. The
standby pump shall automatically start upon failure
of the lead pump. Each pump shall be rated _____ for
GPM (l/s) at _____ feet of head (kPa).
2-Way Water Regulating Valve with Bypass
(Standard)
The condenser circuit shall be pre-piped with a headpressure actuated 2-way regulating valve with
bypass.

3-Way Water Regulating Valve (Optional)

GLYCOOL Coil
The GLYCOOL coil shall be constructed of copper
tubes and aluminum fins and be located upstream of
the evaporator coil. The GLYCOOL coil shall be
designed for closed-loop applications using properly
treated glycol solutions. The coil shall be rated at
_____ BTU/HR (kW) sensible cooling capacity with a
45°F (7.2°C) entering glycol solution temperature.
The GLYCOOL 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.
The condenser circuit shall be pre-piped with a head
pressure actuated 3-way regulating valve.
Design Pressure
The condenser water/glycol circuit shall be designed
for a pressure of [(150 PSI (1034 kPa)) (350 PSI
(2413 kPa))].
Crankcase Heater (Optional)
A crankcase heater is provided to prevent the migration of refrigerant to the compressor during off
cycles.

DISCONTINUED
PRODUCT
3-Way GLYCOOL Valve
The GLYCOOL coil shall be equipped with a fully
proportional 3-way control valve. This motorized control valve shall control the amount of flow to the
GLYCOOL coil and maintain constant temperature
and relative humidity.
Glycol Condenser
The glycol system shall be equipped with a coaxial
condenser having a total pressure drop of _____ feet
of water (kPa) and a flow rate of _____ GPM (l/s),
with _____ °F (°C) entering 40% ethylene glycol temperature.
3-Way Water Regulating Valve
The condenser circuit shall be pre-piped with a head
pressure actuated 3-way water regulating valve.
Design Pressure
The GLYCOOL coil/condenser circuit shall be
designed for a pressure of [(150 PSI (1034 kPa)) (300
PSI (2069 kPa))].
Comparator Circuit
The system shall be equipped with a microprocessorcontrolled comparator sensor that permits free-cooling operation whenever entering glycol temperature
is below return-air temperature.
Propeller Fan Drycooler (Standard)
The Liebert manufactured drycooler shall be the low
profile, slow speed, direct drive propeller fan type.
The drycooler shall be constructed of aluminum and
contain a copper tube aluminum fin coil with an integral electric control panel. The drycooler shall be
designed for _____ °F (°C) ambient.
Centrifugal Fan Drycooler (Optional)
The system shall be supplied with a centrifugal fan
drycooler (LCD). The drycooler shall be constructed of
galvanized steel with a copper tube, aluminum fin coil.
The heavy duty fan shall be the centrifugal type, double width, double inlet. The 1750 RPM (1450 RPM @
50 Hz) fan motor shall be mounted on an adjustable
base, and equipped with an adjustable motor pulley. A
3-way control valve and thermostat shall maintain the
desired fluid temperature. Electrical controls shall be
in a rain tight enclosure. The system shall be designed
for _____ °F (°C) ambient. The drycooler shall have a
_____ Volt, 3 phase, _____ Hz power supply.
Dual Glycol Pump Package (Optional)
The dual pump package shall include pumps, enclosure, and field mounted flow switch. The pumps shall
be wired to the drycooler control box which includes a
lead/lag switch for the pumps. The standby pump
shall automatically start upon failure of the lead
pump. Each pump shall be rated for _____ GPM (l/s)
at _____ feet of head (kPa).


Direct Expansion Coil
The evaporator coil shall have _____ sq.ft. (sq. m)
face area, _____ rows deep. It shall be configured as
(A) (V) frame and be constructed of copper tubes and
aluminum fins and have a maximum face velocity of
_____ ft. per minute (m/s) at _____ CFM (CMH). The
coil shall be provided with a stainless steel drain
pan.
Refrigeration System
The refrigeration system shall consist of a rugged
scroll compressor, pressure safety switches, externally equalized expansion valve, filter dryer, and a
refrigerant sight glass and moisture indicator.
Refrigerant Line Sets (Optional)
Pre-charged refrigerant line sets shall be provided by
Liebert in proper lengths for application. Line set
length shall be _____ feet (m).

The condenser coil shall be constructed of copper
tubes and aluminum fins. The condensing unit shall
be factory assembled, charged with refrigerant and
sealed.
Components shall include scroll compressor, highpressure switch, Lee-temp refrigerant receiver, head
pressure control valve, and liquid line solenoid valve.
The condensing unit shall be designed for 95°F
(35°C) ambient and be capable of operation to -20°F
(-29°C) ambient.
A hot gas bypass circuit shall be provided to reduce
compressor cycling and improve operation under low
load conditions.
The condenser fan shall be designed for
_____ CFM (CMH) at _____ inches (mm) external
static pressure.
Single Glycol Pump Package (Standard)
This system shall be provided with a centrifugal
pump mounted in a weatherproof and vented enclosure. The pump shall be rated for _____ GPM (l/s) at
_____ ft. of head (kPa), and operate on _____ Volt,
3 phase, _____ Hz.
(Optional) Disconnect
Factory installed non-fused disconnect switch allows
unit to be turned off for maintenance.
3-Ton Models
The condensing module shall be capable of being connected to the evaporator section using pre-charged
refrigerant line sets. No brazing, dehydration, or
charging shall be required. The fan/motor assembly
shall be direct drive.

DISCONTINUED
PRODUCT
5-Ton Models
(Optional) Disconnect
Factory installed non-fused disconnect switch allows
unit to be turned off for maintenance.
3-Ton Models
The condensing module shall be capable of being connected to the evaporator section using pre-charged
refrigerant line sets. No piping, brazing, dehydration, or charging shall be required.
5-Ton Models
Condensing unit must be hard piped with the evaporator. Sweat adapters are shipped loose with all
5 ton evaporators for use on the 5 ton condensing
units.
Propeller Fan Drycooler (Standard)
The Liebert manufactured drycooler shall be the low
profile, slow speed, direct drive propeller fan type.
The drycooler shall be constructed of aluminum and
contain a copper tube aluminum fin coil with an integral electric control panel. The drycooler shall be
designed for _____ °F (°C) ambient.
Centrifugal Fan Drycooler (Optional)
The system shall be supplied with a centrifugal fan
drycooler (LCD). The drycooler shall be constructed of
galvanized steel with a copper tube, aluminum fin
coil. The heavy duty fan shall be the centrifugal type,
double width, double inlet. The 1750 RPM (1450 RPM
@ 50 Hz) fan motor shall be mounted on an adjustable
base, and equipped with an adjustable motor pulley.
A 3- way control valve and thermostat shall maintain
the desired fluid temperature. Electrical controls
shall be in a rain tight enclosure. The system shall be
designed for _____ °F (°C) ambient. The drycooler
shall have a _____ Volt, 3 phase, _____ Hz power supply.
The fan/motor assembly shall be belt drive. Condensing unit must be hard piped with the evaporator.
Sweat adapters are shipped loose with all 5 ton evaporators for use on the 5 ton condensing units.

The condenser coil shall be constructed of copper
tubes and aluminum fins with a direct drive propeller type fan and shall include a scroll compressor,
high pressure switch, Lee-temp receiver, head pressure control valve, and liquid line solenoid valve. All
components shall be factory assembled, charged with
refrigerant and sealed. No brazing, dehydration, or
charging shall be required. Condensing unit shall be
designed for 95°F (35°C) ambient and be capable of
operation to -30°F (-34.4°C).
A hot gas bypass circuit shall be provided to reduce
compressor cycling and improve operation under low
load conditions.
(Optional) Quiet-Line Models
The condensing unit shall be designed to operate at a
sound level less then 58 dBa.
(Optional) High Ambient Models
The outdoor condensing unit shall be designed for
design ambient operation of 105°F (40.6°C).
3-Ton Models
The condensing module shall be capable of being connected to the evaporator section using pre-charged
refrigerant line sets. No brazing, dehydration, or
charging shall be required.
5-Ton Models
Condensing unit must be hard piped with the evaporator. Sweat adapters are shipped loose with all 5 ton
evaporators for use on the 5 ton condensing units.

Single Glycol Pump Package (Standard)
This system shall be provided with a centrifugal
pump mounted in a weatherproof and vented enclosure. The pump shall be rated for GPM (l/s) at
_____ ft. of head (kPa), and operate on _____ Volt,
3 phase, _____ Hz.
Dual Glycol Pump Package (Optional)
The dual pump package shall include pumps, enclosure, and field mounted flow switch. The pumps
shall be wired to the drycooler control box which
includes a lead/lag switch for the pumps. The
standby pump shall automatically start upon failure
of the lead pump. Each pump shall be rated for
_____ GPM (l/s) at _____ feet of head (kPa).

Water or Glycol Cooled Condensing Unit
The water/glycol condensing unit shall be equipped
with a coaxial condenser having a total system pressure drop of _____ ft. of water (kPa) and a flow rate of
_____ GPM (l/s) with _____ °F (°C) entering water/
glycol temperature.
Components shall include scroll compressor and
high-pressure switch. The condensing unit shall be
factory charged with R-22 refrigerant.
The condenser circuit shall be pre-piped with a
[(2-way) (3-way)] regulating valve which is headpressure actuated.
The condenser water/glycol circuit shall be designed
for a static operating pressure of [(150 PSI
(1034 kPa)) (350 PSI (2413 kPa))].
A hot gas bypass circuit shall be provided to reduce
compressor cycling and improve operation under low
load conditions.

DISCONTINUED
PRODUCT




The cooling coil shall have a minimum of _____ sq. ft.
(sq. m) face area, _____ rows deep. The coil shall be
controlled by a modulating control valve. The chilled
water coil shall be designed for closed-loop applications using properly maintained water. It shall be
configured as an (A) (V) frame and be constructed of
copper tubes and aluminum fins and have a maximum face velocity of _____ ft. per minute (m/s) at
_____ CFM (CMH). The water circuit shall be
designed to distribute water into the entire coil face
area. The coil shall be supplied with _____ °F (°C)
entering water temperature, with a _____ °F (°C)
temperature rise. The coil shall be supplied with
_____ GPM (m/s) of chilled water and the pressure
drop shall not exceed _____ PSI (kPa). The coil
assembly shall be mounted in a stainless steel condensate drain pan.


(For detailed Guide Specifications on these products,
refer to information posted at www.liebert.com)
SiteScan Web System
SiteLink Module
OpenComms Nform
OpenComms NIC & Web Card (OC-NIC &
OC-Web Card)
Environmental Discrete Outputs Card
(ENV-DO)
Remote Contact Monitor
• RCM4
Autochangeover Controllers
• AC3
• RAC2-8
Universal Monitor
Leak Detection
• Direct Read Module
• Zone Sensor
• Spot Sensor
3-Way Chilled Water Valve (Standard)
The water circuit shall include a 3-way modulating
valve. The microprocessor control shall position the
valve in response to room conditions. Cooling capacity will be controlled by bypassing chilled water
around the coil.
2-Way Chilled Water Valve (Optional)
The water circuit shall include a 2-way modulating
valve. The microprocessor control shall position the
valve in response to room conditions. The minimum
close-off pressure of the valve/actuator assembly
shall be _____ PSI (kPa).







The chilled water circuit shall be designed for a pressure of [(150 PSI (1034 kPa)) (400 PSI (2758 kPa))].
Install environmental control units in accordance
with manufacturer’s installation instructions. Install
units plumb and level, firmly anchored in locations
indicated, and maintain manufacturer’s recommended clearances.
Flow Switch (Optional)

Design Pressure
The flow switch shall activate the alarm system
should the chilled water supply be interrupted. The
switch shall be factory mounted and wired.

Install and connect electrical devices furnished by
manufacturer but not specified to be factory mounted.
Furnish copy of manufacturer’s electrical connection
diagram submittal to electrical contractor.


Install and connect devices furnished by manufacturer but not specified to be factory mounted. Furnish copy of manufacturer’s piping connection
diagram submittal to piping contractor.


Connect water supply and drains to air conditioning
unit. Provide pitch and trap as manufacturer’s
instructions and local codes require.


Start up environmental control units in accordance
with manufacturer’s start up instructions. Test controls and demonstrate compliance with requirements.

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
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Ensuring The High Availability
0f Mission-Critical Data And Applications.
Emerson Network Power, the global leader in enabling business-critical
continuity, ensures network resiliency and adaptability through
a family of technologies—including Liebert power and cooling
technologies—that protect and support business-critical systems.
Liebert solutions employ an adaptive architecture that responds
to changes in criticality, density and capacity. Enterprises benefit
from greater IT system availability, operational flexibility and
reduced capital equipment and operating costs.
Technical Support / Service
Web Site
www.liebert.com
Monitoring
800-222-5877
monitoring@emersonnetworkpower.com
Outside the US: 614-841-6755
Single-Phase UPS
800-222-5877
upstech@emersonnetworkpower.com
Outside the US: 614-841-6755
Three-Phase UPS
800-543-2378
powertech@emersonnetworkpower.com
Environmental Systems
800-543-2778
Outside the United States
614-888-0246
Locations
United States
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Europe
Via Leonardo Da Vinci 8
Zona Industriale Tognana
35028 Piove Di Sacco (PD) Italy
+39 049 9719 111
Fax: +39 049 5841 257
Asia
7/F, Dah Sing Financial Centre
108 Gloucester Road, Wanchai
Hong Kong
852 2572220
Fax: 852 28029250
While every precaution has been taken to ensure the accuracy
and completeness of this literature, Liebert Corporation assumes no
responsibility and disclaims all liability for damages resulting from use of
this information or for any errors or omissions.
© 2006 Liebert Corporation
All rights reserved throughout the world. Specifications subject to change
without notice.
® Liebert and the Liebert logo are registered trademarks of Liebert
Corporation. All names referred to are trademarks
or registered trademarks of their respective owners.
Emerson Network Power.
The global leader in enabling Business-Critical Continuity™.
Embedded Computing
AC Power Systems
Embedded Power
Connectivity
DC Power Systems
Integrated Cabinet Solutions
EmersonNetworkPower.com
Outside Plant
Services
Power Switching & Control
Site Monitoring
Precision Cooling
Surge Protection
Business-Critical Continuity, Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co.
©2006 Emerson Electric Co.
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