Indoor Unit
Evaporator
Models
Charge R-407C
oz (kg)
Liebert Mini-Mate2â„¢
MMD12E 3 (0.085)
MMD18E 4 (0.113)
MMD24E 7 (0.198)
MMD35/36E 7 (0.198)
MMD59/60E 4 (0.113)
MMD95/96E 7 (0.198) each circuit
Liebert DataMateâ„¢
DME020E 4 (0.113)
DME027E 5 (0.141)
DME037E 6.5 (0.184)
Liebert Challengerâ„¢ 3000
BF/BU036E 9 (0.255)
BF/BU060E* 13 (0.368)
* Evaporator is charged with nitrogen at the factory
Table 2.12 Evaporator Charge Levels
2.6 Electrical Connections
Each unit is shipped from the factory with all internal wiring completed. All power, control wiring and
ground connections must be made in accordance with the National Electrical Code and local codes. Refer
to equipment nameplate regarding wire size and circuit protection requirements. Refer to Figure 2.5 on
pageîš´8 ,Figure 2.7 on pageîš´10 Figure 2.8 on pageîš´11 and electrical schematic (Figure 2.9 on pageîš´12
throughFigure 2.10 on pageîš´13) when making connections. A manual electrical disconnect switch should
be installed within 5 feet (1.6m) of the unit in accordance with codes.
WARNING! Risk of electric shock. Can cause injury or death. Disconnect all local and remote
electric power supplies before working within. Use a voltmeter to be sure power is turned off
before making any electrical connections.
NOTICE
Risk of incorrect phase sequencing. Can cause equipment damage. Three-phase power must be
connected to the unit line voltage terminals in proper sequence so that the scroll compressor rotates in
the correct direction.
The three-phase scroll compressor requires proper phasing to ensure correct motor rotation. The
component connections have been phase synchronized at the factory. Power phasing should be changed
only at the line voltage supply to the unit. To change phasing, switch any two power leads to the unit.
Observe system pressures to determine whether the unit is operating properly.
NOTICE
Risk of compressor slugging. Can cause equipment damage.
Apply power to condenser 8 hours before operating the system. This time is required to allow liquid
refrigerant to be driven out of the compressor. This is especially important at low ambient temperatures.
The compressor crankcase heater is energized as long as power is supplied to the unit.
Vertiv | Liebert PFH Installer/User Guide | 22
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