Emerson SL-19534 user manual Connecting the Dual Unit Controller to the InteleCool

Installation

1.1.2Connecting the Dual Unit Controller to the InteleCool

1.Install and level the Dual Unit Control.Leveling is not critical because the electronic thermostat does not contain mercury-filled limit switches.

2.Wire the InteleCool units to the Dual Unit Control using industry-standard thermostat cable. Each InteleCool will need at least 4 conductor, 20 gauge, Class 2 copper wire for distances up to 50 feet (15.2m). Use 18 gauge, Class 2 copper wire for distances between 50 and 75 feet (15.2 - 22.9m).

3.Wire the Dual Unit Control per the diagram on the inside cover of the Dual Unit Control. The InteleCool to Dual Unit Control low voltage control wiring connections are as follows:

InteleCool Terminals	Dual Unit Control Terminals
R & 1 - 24 VAC	R
2 - 24 VAC RTN	1/2
W - Heating	W
G - Evaporator Fan	See Step 4 Below
Y - Cooling	Y

4.Each InteleCool MUST have a jumper wire installed between terminals "G" and "Y". This assures that the fan will energize on a call for cooling.

5.For continuous operation of InteleCool unit evaporator fans, the "G" and "R" terminals may be connected. In this mode the jumper between the "G" and "Y" terminals should be removed, and the lead/lag function will control only the condenser fans, compressors, and heaters.

6.Tighten and check all connections for correct installation.

7.Refer to the thermostat user manual for setup and operation of the electronic thermostat.

NOTE

The electronic thermostat does not contain mercury, but it is not for use with older versions of the DUC printed wiring assembly. The electronic thermostat requires a connection to the 24VAC RTN terminal (Connector P1, Terminal 7) on the newer versions of the DUC printed wiring assembly. This connection is not available on the older version of the DUC.

Mercury thermostats may be used with the newer version of the DUC, but the P1 Terminal 7 connection noted above is not required for the mercury-style thermostat.

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