Technical data

Guide Specifications—For Liebert DataMate 1.5- to 3-Ton (5 to 10.5kW)
35 Liebert
®
DataMate
™
2.2 Direct Expansion System Components
2.2.1 Direct Expansion Coil
The evaporator section shall include an evaporator coil, thermostatic expansion valve and filter-drier.
The evaporator coil shall have ___ ft
2
(m
2
) face area, ___ rows deep. It shall be constructed of copper
tubes and aluminum fins and have a maximum face velocity of ___ FPM (m/s) at _____ CFM (CMH).
An externally equalized thermostatic expansion valve shall control refrigerant flow. The evaporator
coil shall be factory-charged with R-407C refrigerant and sealed. The coil shall be provided with a
galvanized steel drain pan. The evaporator unit can be coupled directly with a water/glycol
condensing unit or mounted remote to the indoor or outdoor condensing unit.
2.3 Indoor Air-Cooled Centrifugal Fan Condensing Unit
Condensing unit components shall include condenser coil, scroll compressor, high-pressure switch,
Liebert Lee-Temp
™
refrigerant receiver, head pressure control valve, hot gas bypass system and
liquid line solenoid valve. The hot gas bypass circuit shall be provided to reduce compressor cycling
and improve operation under low-load conditions. Units available for [(2-ton)(3-ton)] systems.
All components shall be factory-assembled, charged with R-407C refrigerant and sealed. No internal
piping, 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°C). The condensing unit can be
mounted directly to the evaporator or can be mounted remote to the evaporator.
The condensing coil shall be constructed of copper tubes and aluminum fins. The condenser fan shall
be centrifugal type, double inlet, direct drive and shall operate at 1050 rpm (890 rpm @ 50 Hz). The
fan and motor shall be mounted on vibration isolators. The condenser fan shall be designed for
____CFM (CMH) at ____" (mm) w.g. external static pressure.
2.3 Outdoor Air-Cooled Prop Fan Condensing Unit
Condensing unit components shall include a condenser coil, a direct-drive propeller-type fan, a scroll
compressor, high-pressure switch, Liebert Lee-Temp receiver and head pressure control valve, hot
gas bypass system and liquid line solenoid valve. A hot gas bypass system shall be provided to reduce
compressor cycling and improve operation under low-load conditions.
All components shall be factory-assembled, charged with R-407C refrigerant and sealed. No internal
piping, 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).
The condenser coil shall be constructed of copper tubes and aluminum fins.
(Option) The 2- or 3-ton condensing unit shall be designed to operate at a sound level less than
58dBA.
(Option) The 2- or 3-ton condensing unit shall be designed for design ambient operation of 105°F
(40.6°C).
(Option) The condenser coil shall be phenolic-coated for extended coil life in coastal areas.
2.3 Indoor Close-Coupled Water/Glycol Condensing Unit
The water/glycol-cooled condensing unit shall include a scroll compressor and a water/glycol cooled
condenser, and shall be capable of being close-coupled to the evaporator module. The water/glycol
cooled condenser shall be designed to balance the heat rejection at ______ °F (°C) entering
water/glycol temperature with a flow rate of ___ GPM (l/s) and have a total system pressure drop of
_____ ft of water (kPa). An adjustable two-way water regulating valve shall be included. The
condenser water/glycol circuit shall be designed for a static operating pressure of 150psi (1034kPa).
All components shall be factory assembled, charged with R-407C refrigerant, sealed and be capable of
being connected to the evaporator section using quick connect refrigerant couplings and integral
wiring harness for single-point power connection for close-coupled system. No refrigeration piping,
brazing, dehydration or charging shall be required.