Liebert 8 Tons Piping Connections, Electrical Connections Condensing Unit, Control Connections

Site Preparation and Installation

2.5.3Piping Connections

Details for refrigerant (R-22) loop piping are in 2.4.3 - Piping Connections and Coolant Require- ments.

Figure 12 Piping connections - indoor air-cooled centrifugal fan condensing unit

					Condenser Coil
			High Pressure
		Scroll	Switch
		Compressor
	Liquid Injection
	Valve Bulb		Hot Gas Bypass
			Solenoid Valve
Suction Line Male Quick					3/8" (9.5mm) FLR
					Pressure Relief Valve
Connect Coupling			3 - Way Head
Suction Line Female Quick	*		Pressure	Check	Sight Glass
Connect Coupling			Control Valve
Sensing Bulb			Hot Gas Bypass	Valve
			Control Valve
External Equalizer	Liquid Injection
	Valve
Service Access			Liquid Line		Lee - Temp
					Receiver
			Solenoid Valve
Ports
				Receiver Heater
					Pressure Balancing
	*	Liquid Line Male Quick
				Pressure Limiting
					Valve
		Connect Coupling		Switch

Liquid Line Female Quick

Connect Coupling

Filter

Drier

Expansion Valve

(Two circuits required, single circuit shown for clarity)

Evaporator Coil DPN000236_Rev0

2.5.4Electrical Connections - Condensing Unit

Refer to 2.4.4 - Electrical Connections, Evaporator or Chilled-Water Unit and Figure 14 for general wiring requirements and cautions. Refer to electrical schematic when making connections. Refer to unit serial tag for full load amp and wire size amp ratings.

Power Connections

The condensing unit requires its own power source and earth ground, with a disconnect switch to iso- late the unit for maintenance.

NOTE

Refer to serial tag for full load amp and wire size amp ratings

Control Connections

Field-supplied control wires must be connected between the evaporator and the condensing unit (See Figure 14 and the electrical schematic on the units for more details.) Seven (7) wires are required between the evaporator and condensing unit. Eighth and ninth wires are required on systems with hot gas bypass.

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