Emerson Precision Cooling For Business-Critical Continuity Figure i - Manual (Page 5)

Product Description
1
1.0 P
RODUCT
D
ESCRIPTION
1.1 Prop Fan Condensing Units
Liebert propeller fan condensing units are available in a range of sizes and configurations to offer
flexibility in designing a precision environmental control system. The appropriate propeller fan con-
densing unit paired with a corresponding Liebert fan coil evaporator model such as Liebert Data-
Mate, Liebert Mini-Mate2 or Liebert Challenger 3000 is an effective solution for your environmental
control application requirements.
Split system condensing units are connected to the evaporator unit by two refrigerant lines (four in
8-ton systems) and a low-voltage control cable. The condensing unit requires a separate power source
and power disconnect switch.
1.1.1 Base System 95°F (35°C) Ambient Models
The heart of the refrigeration system is a quiet, high efficiency scroll compressor with internal vibra-
tion isolation mountings, pressure safety controls and built-in overload protection. Standard features
include crankcase heater, high pressure switch, condenser coil, sight glass, filter drier, hot gas bypass
system with liquid quenching valve, direct drive propeller fan and motor, and Liebert Lee-Temp flood-
back head pressure control. These models are designed to provide catalog capacity of the appropriate
evaporator section up to 95°F (35°C) outside ambient temperature.
1.1.2 105°F (41°C) Ambient Models
These models contain similar components to the base models except the coils and fans are sized to
provide catalog capacity of the appropriate evaporator section up to 105°F (41°C) outside ambient
temperature.
1.1.3 Quiet-Line Models
These models contain similar components to the base models except the coils and fans are sized to
provide catalog capacity of the appropriate evaporator section up to 95°F (35°C) outside ambient tem-
perature with a noise level of less than 58 dBA.
1.2 Optional Equipment
1.2.1 Coated Coil
This option provides a phenolic coating for the condenser coil (extended lead time is required for this
option; consult factory).
1.2.2 Pre-Charged Refrigeration Line Sets
For efficient condenser/evaporator connection, factory pre-charged line sets with quick connect fit-
tings are available in 15-ft. and 30-ft. (4.5m and 9m) lengths. Each set includes an insulated copper
suction line and copper liquid line, both charged with R-407C refrigerant and sealed. Line sets are
only available for 1 to 3.5 Ton Units.
1.2.3 Refrigerant Line Sweat Adapter Kit
This kit includes the compatible fittings required (two for the insulated suction line and two for the liq-
uid line) when using field-supplied interconnecting refrigerant lines instead of the pre-charged line sets.
1.2.4 277V Step-Down Transformer
A 37.5A, 277V step-down transformer is available for 1-to 3-Ton 60Hz condensing units needing
277/1/60 input power. Apply this transformer to a 208/230/1/60 condensing unit. The transformer is
coated with epoxy and contained in an enclosed, non-ventilated electrical box with adaptable mount-
ing brackets.