Liebert 8 Tons, 50 & 60Hz user manual Evaporator unit electrical connections, Front of Unit

					Site Preparation and Installation
Figure 11	Evaporator unit electrical connections
						Customer Remote Alarm
						Connection TB50,51,56,24.
						Field supplied 24V Class 2
Earth Ground Connection						wiring.
Connection terminal for field			Common Alarm Connection.
supplied earth grounding wire.
High Volt Power Connections		Optional factory installed	Use field supplied 24V
			Class 2 wire. TB75-76.
Electric service connection terminals.		disconnect switch.	Drycooler/Circulating Pump Control
			Circuit TB70-71. Optional
			W/Glycool/Econ-O-Cycle models.
			Use field supplied 24V class 2 wire.
			Optional Condensate Pump
			Auxiliary Float Switch Shut
			Down Connection
			TB60-61.
				1	60	24
				2	61	50
				3	70	51
Microprocessor				4	71	56
		FRONT OF UNIT		5	75	11
Board				6	76	12
	Remote Control Panel Connection to
				7	77
	TB3-1,2,3,4 connected with field supplied
				8	78
	Thermostat wire (22ga, shielded/jacketed:
	available from Liebert or others).			9	84
		Heat Rejection Connection. Field supplied		10	85
				37	38
		24V NEC Class 2 wiring TB1-10. See note 2.

Optional Remote Sensor	Remote Unit Shutdown. Use field supplied
	24V Class 2 wire. Replace existing jumper
Connection P16-1,2,3,4.					Remote Humidifier Contact
	between TB37 & TB38 with NC switch
	having a minimum 75 VA rating.				Field Supplied 24V class 2
		Site Monitoring Connection.			wiring to terminals 11 & 12,
					located in field wire
		Terminals TB78 (+) TB77 (-) are for
Field supplied unit disconnect switch					compartment.
		connection of a 2 wire, twisted pair,
when factory unit disconnect switch
		communication cable to optional			Optional Main Fan Auxilary
is not supplied.			Electric service
		sitescan.			Side Switch TB84-85.
Entrance for customer high			not by Liebert		Field supplied 24V Class 2
					wire.
volt connections.
				NOTES:
Electrical entrance for
				1. Refer to specification sheet for
optional condensate				full load amp. and wire size amp.
pump on left side of unit.				ratings.
				2. Control voltage wiring must be a
				minimum of 16 GA (1.6mm) for up
				to 75’ (23m) or not to exceed 1 volt
				drop in control line.
Optional Single
Point Power Kit

	Field supplied, field wired thermostat wire to remote wall box.
Entrance for customer low	Entrance for customer low voltage connections
	Field supplied 24V (NEC Class2 wiring) to condensing unit. (if applicable)	DPN000244_Rev0
voltage connections.

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