Vertiv Liebert Mini-Mate2 - Indoor Water- and Glycol-Cooled Condensing Unit Installation; Location, Electrical, and Piping

Control Connections
Field-supplied control wires must be connected between the evaporator and the condensing unit. (See
Figure 7.7 on page38 and the electrical schematic on the units for more details.) Four wires are required
between the evaporator and condensing unit.
7.7 Indoor Water- and Glycol-Cooled Condensing Unit Installation
WARNING! Follow all national and local building, electrical and plumbing codes.
7.7.1 Location Considerations
The condensing unit may be located above the dropped ceiling or any remote indoor area. If noise is of
concern, the condensing unit should be located away from personnel. Normal operating sound may be
objectionable if the condensing unit is placed near quiet work areas.
To mount the unit in the ceiling, refer to Installing the Ceiling Units on page28.
7.7.2 Electrical Connections
Refer to Electrical Connections on page36 for general wiring requirements and cautions. Refer to
electrical schematic when making connections. Refer to serial tag for full load amp and wire size amp
ratings.
Control Connections
A 4-wire control connection is required from the evaporator unit to the condensing unit. Glycol cooled
units also require a two-wire control connection to the drycooler and pump package.
7.7.3 Piping Connections
Details for refrigerant loop piping are in Piping Connections and Coolant Requirements on page30.
Water/Glycol Piping Considerations
Manual service shut-off valves must be installed at the supply and return line to each unit. This enables
routine service and/or emergency isolation of the unit. When the condensing unit fluid quality is poor,
filters that can be easily serviced should be placed in the supply line. These filters extend the service life
of the condensing unit.
Condensing Unit Fluid Requirements
The maximum fluid pressure is 150 PSI standard pressure and 350 PSI for high pressure units (Refer to
unit serial tag and model number description page at beginning of this manual).
Automotive antifreeze must not be used in glycol systems. Prepare glycol solution using customary
practices.
Vertiv | Liebert Mini-Mate2—5 ton User Manual| 47