Vertiv Liebert Mini-Mate2, Technical Data Manual

Page: 76 / 82

Liebert Mini-Mate2—2- and 3-Ton
SL-10535a_ REV5_2-17 6 Guide Specifications
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
condenser fan shall be designed for ____CFM (CMH) at ____" (mm) w.g. external static pressure.
2.3 OUTDOOR AIR-COOLED PROP FAN CONDENSING UNIT
The condensing unit shall be designed for outdoor use with either roof or ground level mounting. The
condensing unit is constructed of galvanized and galvanneal painted steel for corrosion resistance.
Removable exterior panels shall allow access to the electric panel or refrigeration components for service
or maintenance. Both inlet and outlet air grilles shall be heavy duty steel with a durable polyester coating.
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 The condensing coil shall be constructed of copper tubes
and aluminum fins.
The hot gas bypass circuit shall be provided to reduce compressor cycling and improve operation under
low-load conditions. In split systems, the hot gas bypass shall be completely contained in the condensing
unit. Field installed third refrigerant line shall not be acceptable. Hot gas bypass shall be automatically
deactivated upon a call for dehumidification.
High pressure switch shall protect the unit from abnormal refrigerant pressure conditions and shall
deactivate the compressor and annunciate an alarm at the wall controller. The blower shall continue to
circulate air. The wall controller shall be used to manually restart the compressor function after the
automatic pressure switch resets. Three high head pressure alarms in a rolling 12-hour period shall lock
out the manual restart feature until power is cycled to the evaporator unit.
A pressure balancing valve shall be factory installed to reduce the chance of high pressure cut-out due to
excessive refrigerant migration to the receiver due to changing outdoor temperatures during off-cycles.
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 condensing unit shall be designed to operate at a sound level less than 58 dBA.
(Option) The outdoor condensing unit shall be designed for design ambient operation of 105°F (40.6°C).
(Option) The coils shall be phenolic-coated for extended coil life in coastal areas.
2.3 INDOOR WATER/GLYCOL-COOLED CONDENSING UNIT
The water/glycol condensing unit shall include a scroll compressor, high-pressure switch, coaxial
condenser, water-regulating valve, hot gas bypass system and liquid line solenoid valve. The cabinet and
chassis shall be constructed of heavy gauge galvanized steel, and shall be serviceable from one side.
Mounting brackets shall be integral to the cabinet design and be designed for ceiling mounting.
The hot gas bypass circuit shall be provided to reduce compressor cycling and improve operation under
low-load conditions. In split systems, the hot gas bypass shall be completely contained in the condensing
unit. Field installed third refrigerant line shall not be acceptable. Hot gas bypass shall be automatically
deactivated upon a call for dehumidification.