EMI S1C High Volt Electrical Wiring, Low Volt Interconnect wiring, Wiring must be at least 18 awg

WLCA/WLHA HIGH WALL EVAPORATOR Installation Instructions

4.To access High and Low wiring remove the screw on the front of the control box.

High Volt Electrical Wiring

5.Refer to the wiring diagram to connect the power wire to Black L1 and the other wire to Red or White (115V) L2 at the power connector location.

6.Connect the ground wire to the ground

lug or lead at the same location in the control box.

Low Volt Interconnect wiring

for Unit mounted controls

The 24V control transformer is located in the evaporator. This provides low Volt control power to both the evaporator and condenser. Depending on the models se- lected, the low volt interconnect control wiring may be effected.

Ground	Low Voltage
L1	Connections
L2
!	Warning !

Note: All low volt interconnect	Be sure to keep any un-used wires
wiring must be at least 18 awg.	insulated with a wire nut or crimp.

Units With or without heat

Cooling only units utilize two low volt interconnecting wires between the indoor and outdoor units.

•Wires designated “Y” (yellow) and “C” (brown) of the air handler should be con- nected to the corresponding “Y” (yellow) and “C” (brown) wires or terminals of the condenser. (See Figure 1A)

•Other wires or terminals such as “R” (red) or “O” (orange) may not be needed and should be protected by a wire nut from making contact with the junction box or other metal surfaces.

Heat Pump Connection: In addition to the “Y” and “C” connections required for cool- ing, heat pumps require a reversing valve control wire “O” (orange) that is energized in the cooling mode.

If the indoor unit has an electric heater, then a ”W” (white) wire connection will also be needed to energize the indoor electric heat. If a remote thermostat is used.

Heat pumps models require an “R” connec- tion between the indoor and outdoor unit to provide power to the defrost control board in the condenser. (See Figure 1B)

WLCA/WLHA High Wall Evaporator 7 www.enviromaster.com