Emerson MINI-MATE2 Evaporator unit electrical connections, Site Preparation and Installation

Site Preparation and Installation

Figure 14 Evaporator unit electrical connections

Earth Ground Connection terminal for field-supplied earth grounding wire

High-Volt Power Connections

Electric service connection terminals

Factory-installed disconnect switch

Remote Humidifier Contact Field-Supplied 24V Class 2 wiring to Terminals 11 & 12, located in field wire compartment

	Optional Condensate Pump Auxilary Float
	Switch Connection to Terminal TB1-8 and
	TB1-9.
	Heat Rejection Connection. Field
	supplied 24V NEC class 2 wiring.
	See Note 2.
	For remote air cooled units from
Customer Remote Alarm Connection. Field-supplied 24V Class 2 wiring	Terminals TB2-1, 2, 3 & 4 in the
	Fan/Coil module to Wires 1, 2, 3 & 4
to connection TB1-1, TB1-2 and TB1-3.
	in the condensing module:
Remote Control Panel Connection to TB3-1,2,3,4 connected
	1. 24V GND
with field-supplied thermostat wire (22ga, shielded/jacketed:	2. 24V Supply
available from Emerson or others). Unit Control Board	3. High Pressure Alarm (OPT)
terminals marked GND, +5V, T-, T+ must be connected to	4. Hot Gas Bypass Connection
corresponding terminals on Remote Control Wall Box
Site Monitoring Connection. Terminals TB4-1(+) TB4-2(-) are for connection
of a 2 wire, twisted pair, communication cable (available from Emerson
or others) to optional Liebert SiteScan
Remote Unit Shutdown. Replace existing jumper between Terminals TB1-4 and TB1-5	Common Alarm Connection.
with normally closed switch having a minimum 75 VA rating. Use field-supplied 24V
	Field-supplied 24V Class 2 wiring to
Class 1 wire
	common alarm connection TB1-6 and TB1-7.
Field-supplied unit disconnect switch
when factory unit disconnect switch	Electric service not by Emerson
is not supplied
Entrance for customer	NOTES:
	1. Refer to specification sheet for
high-volt connections
	full load amp. and wire size amp.
	ratings.
	2. Control voltage wiring must be a
	minimum of 16 GA (1.3mm) for up
	to 75' (23m) or not to exceed 1 volt
	drop in control line
Electrical entrance for
optional condensate	Drycooler/Circulating pump
pump on back of unit	control circuit TB70-71. Optional
	w/Econ-O-Cycle models. Use
	field-supplied 24V Class 2 wire.

Entrance for customer low-voltage connections

Field-supplied, field-wired thermostat wire to remote wall box

Entrance for customer low voltage connections

Field-supplied 24V (NEC Class 2 wiring)

to condensing module (if applicable) DPN000221 Rev. 2

25 Liebert® Mini-Mate2™