user manual
5-Ton Models
The fan/motor assembly shall be belt drive. Condens-
ing unit must be hard piped with the evaporator.
Sweat adapters are shipped loose with all 5 ton evap-
orators for use on the 5 ton condensing units.
The condenser coil shall be constructed of copper
tubes and aluminum fins with a direct drive propel-
ler type fan and shall include a scroll compressor,
high pressure switch, Lee-temp receiver, head pres-
sure 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 con-
nected 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 evapo-
rator. Sweat adapters are shipped loose with all 5 ton
evaporators for use on the 5 ton condensing units.
Water or Glycol Cooled Condensing Unit
The water/glycol condensing unit shall be equipped
with a coaxial condenser having a total system pres-
sure 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 head-
pressure 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.
(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 con-
nected to the evaporator section using pre-charged
refrigerant line sets. No piping, brazing, dehydra-
tion, or charging shall be required.
5-Ton Models
Condensing unit must be hard piped with the evapo-
rator. 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 inte-
gral 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 sup-
ply.
Single Glycol Pump Package (Standard)
This system shall be provided with a centrifugal
pump mounted in a weatherproof and vented enclo-
sure. 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, enclo-
sure, 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).
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