Brochures and Data Sheets

For very low noise applications, the Liebert Quiet-Line models achieve
additional sound reduction with slow speed motors (570 rpm).
Reliable Heat Rejection To Match Many Conditions
Liebert condensers and drycoolers are fully factory wired and
tested for easy installation. Only electrical and refrigerant or
glycol connections need to be made at the site. Constructed
with an aluminum cabinet and a copper-tube aluminum-
fin coil, these exceptionally dependable units are corrosion
resistant and designed to operate for prolonged periods of
exposure in the worst weather conditions. They are available
in a wide range of capacities, as well as horizontal and vertical
airflow configurations.
Quiet — And Even Quieter
All Liebert condensers are designed to operate at a minimal noise
level. This is accomplished as the result of the Liebert fan blade design
combined with a cabinet structure that minimizes air resistance. In
applications where noise restrictions are a concern and further sound
reduction is required, the Liebert Quiet-Line™ family of condensers
and drycoolers offer levels as low as 57 dBA. Designed for outdoor
installation, these units reduce unit operating noise even further
through the use of lower speed motors and a larger coil surface.
Liebert Condensers
The low-profile, direct-drive propeller fan type air-cooled
condensers utilize either one or two separate circuits. Each
balances the heat rejection of the corresponding compressor.
Liebert air-cooled condensers are designed to maintain proper
head pressures using variable-speed fans down to -20° F (-29° C)
or Liebert Lee-Temp Head Pressure Control System down
to -30° F (-34° C).
Liebert Drycoolers
Liebert drycoolers are designed for easy installation,
uncomplicated service and maximum reliability. Featuring
multiple methods for wintertime control, the drycoolers are
offered in a wide range of models to fit every application. Several
pump packages are available.
Liebert’s 10 fan drycooler is a spacesaving unit designed to
provide heat rejection of 150 tons in a footprint of 123 square
feet — 40 percent less space than required for two conventional
75 ton drycoolers.
Liebert Pump Packages
Standard Packages .75 to 7.5 hp single and dual pumps (piping
shown optional). Non-standard Packages 7.5 to 50 hp in special
fiberglass housings.
Liebert PB Series
Through the wall indoor heat rejection unit for those
applications where outdoor heat rejection location is not
practical, like high-rise buildings or areas with restricted access.
Available with Lee-Temp head pressure control.
Liebert manufactures its own line of air-cooled condensers and drycoolers that are precisely matched to the heat rejection
requirements of our air conditioning and fluid chiller systems for any ambient temperature or altitude.
100
60
70
80
30
40
Threshold of good hearing
Buzzing insect at 3 feet
Conversational speech
LiebertQuiet-Line Air Cooled
Condenser/Drycooler
0
Common Sound Levels
10
20
Whispered conversation at 6 feet
Quiet residential area
50
Bird chirping
Vacuum
Computer printout room
Standard Air Cooled
Condenser/Drycooler
Liebert 10 Fan Drycooler
Liebert 2 fan Condenser
22
Liebert Condensers And Drycoolers