Technical data

Guide Specifications for Liebert Mini-Mate2- 5-Ton Systems
Liebert
®
Mini-Mate2
™
41
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 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).
2.3 Indoor Water/Glycol-Cooled Condensing Unit
The water/glycol condensing unit components shall include scroll compressor, high-pressure switch,
coaxial condenser, water regulating valve, hot gas bypass system and liquid line solenoid valve. A hot
gas bypass circuit 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.
The coaxial condenser shall have 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 that is head-
pressure actuated.
The condenser water/glycol circuit shall be designed for a static operating pressure of [(150psi
(1034kPa)) (350psi (2413kPa))].
2.4 Factory-Installed Options
2.4.1 Steam Generating Humidifier
The environmental control 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, steam distributor and electronic controls. The need to change canister shall
be annunciated on the microprocessor wall box control panel. The humidifier shall have a capacity of
_______ lb./hr. (kg/h). An LED on the humidifier assembly shall indicate cylinder full, overcurrent
detection, fill system fault and end-of-cylinder-life conditions.
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. 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 pre-piped
with a 2-way solenoid valve and cleanable Y-strainer. The hot water reheat coil shall be available on
chilled water units only.