Emerson MINI-MATE2 5.7.1Location Considerations, 5.7.2Electrical Connections, Control Connections

Site Preparation and Installation

5.7Indoor Water- and Glycol-Cooled Condensing Unit Installation

NOTE

Follow all national and local building, electrical and plumbing codes.

5.7.1Location 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 5.4 - Installing the Ceiling Units.

5.7.2Electrical Connections

Refer to 5.4.4 - Electrical Connections 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.

5.7.3Piping Connections

Details for refrigerant loop piping are in 5.4.3 - Piping Connections and Coolant Requirements.

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.

Regulating Valve

Water/Glycol cooled units include a coolant flow regulating valve that is factory-adjusted and should not need field adjustment.

Standard pressure and high pressure valves are adjusted differently. Contact Emerson’s Precision Cooling Support before making any adjustments.

33 Liebert® Mini-Mate2™