Liebert Mini-Mate2—2- and 3-Ton
SL-10535a_ REV5_2-17 7 Guide Specifications
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.
All components shall be factory-assembled, charged with R-407C refrigerant and sealed. No internal
piping, brazing dehydration or charging shall be required.
The water/glycol condensing unit shall be equipped with a coaxial condenser having a total system
pressure drop of ______ ft. of water (kPa) and a flow rate of ______ GPM (l/s) with ______ °F (°C)
entering water/glycol temperature.
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
[(150PSI (1034kPa)) (350 PSI (2413kPa))].
2.4 FACTORY-INSTALLED OPTIONS
2.4.1 Steam Generating Humidifier
The Thermal Management system shall be equipped with a steam generating humidifier that is controlled
by the microprocessor control system. It shall be complete with disposable canister, all supply and drain
valves, 1" (25.4mm) air gap on fill line, inlet strainer, steam distributor and electronic controls. The need
to change canister shall be annunciated on the wall-mounted controller. The humidifier shall have a
capacity of 4.3 lb/hr (2.0 kg/h). An LED light on the humidifier assembly shall indicate cylinder full,
overcurrent detection, fill system fault and end of cylinder life conditions. The canister flush water shall
not drain into the coil drain pan, due to risk of aggressive corrosion of the evaporator coil. The
humidifier wand shall be mounted over the coil drain pan.
2.4.2 Electric Reheat
The electric reheat shall be low-watt density, 304/304 stainless steel, finned-tubular and shall be capable
of maintaining room dry bulb temperature conditions when the system is calling for dehumidification.
The reheat section shall include a UL-approved safety switch to protect the system from overheating. A
ground current detector shall be factory installed to shut-down the entire unit if a ground fault in the
reheat system is detected.
The capacity of the reheat coils shall be ______ BTU/HR (kW), with unit input voltage of _____ V,
controlled in one stage.
2.4.3 Hot Water Reheat
The hot water reheat coil shall have copper tubes and aluminum fins with a capacity of ______ BTU/HR
(kW) when supplied with ______°F (°C) entering water temperature at _______ GPM (l/s) flow rate.
Maximum pressure drop shall be ______ PSI (kPa). The control system shall be factory prepiped with a
2-way solenoid valve and cleanable Y-strainer. The hot water reheat coil shall only be available on chilled
water units.
2.4.4 SCR Electric Reheat
The electric reheat shall be low-watt density, 304/304 stainless steel, finned-tubular and shall be capable
of maintaining room dry bulb conditions when the system is calling for dehumidification. The reheat
section shall include a UL-approved safety switch to protect the system from overheating. A ground
current detector shall be factory installed to shut-down the entire unit if a ground fault in the reheat
system is detected.
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