How to Wire a Ranco ETC-111000-000 Temperature Controller

A Ranco ETC-111000-000 is a single stage electronic temperature control that can be used for various heating and cooling applications. It has a LCD display that shows the current temperature, setpoint, differential, and mode of operation. It also has a SPDT output relay that can switch on or off the device that is being controlled by the temperature sensor.

The Ranco ETC-111000-000 can operate on either line voltage (120/208/240V AC) or low voltage (24V AC). In this article, we will show you how to wire a Ranco ETC-111000-000 for a line voltage application, using a two-wire mechanical control as an example.

What You Will Need

To wire a Ranco ETC-111000-000, you will need the following tools and materials:

• A Ranco ETC-111000-000 temperature controller
• A two-wire mechanical control (such as a thermostat or a pressure switch)
• A power source (such as a breaker panel or a transformer)
• A load device (such as a fan, a pump, or a heater)
• Wire nuts, electrical tape, and wire strippers
• A screwdriver and a drill
• A multimeter (optional)

Step 1: Mount the Ranco ETC-111000-000

The first step is to mount the Ranco ETC-111000-000 to a wall or any flat surface using a combination of any two or more of the slotted holes located on the back of the control case. You can use screws or bolts to secure the control to the surface. Make sure the control is mounted in a location that is accessible and visible, and that the temperature sensor cable can reach the desired location.

Step 2: Wire the Power Source

The next step is to wire the power source to the Ranco ETC-111000-000. The power source can be either 120V AC, 208V AC, or 240V AC, depending on your application. The Ranco ETC-111000-000 has four terminals on the bottom of the control: L1, L2, C, and NO. L1 and L2 are the line voltage terminals, C is the common terminal, and NO is the normally open terminal.

To wire the power source, you will need to connect one of the power source wires to the L1 terminal, and the other power source wire to the L2 terminal. You can use wire nuts or electrical tape to secure the connections. If you have a neutral wire in your power source, you can connect it to the C terminal, but this is not required for the operation of the control.

Step 3: Wire the Mechanical Control

The third step is to wire the mechanical control to the Ranco ETC-111000-000. The mechanical control can be any two-wire device that closes or opens a circuit based on a set condition, such as a thermostat or a pressure switch. The Ranco ETC-111000-000 has a built-in anti-short cycle compressor delay feature that prevents the load device from cycling on and off too frequently, which can damage the device and reduce its efficiency. The anti-short cycle compressor delay can be set from 0 to 12 minutes, depending on your preference.

To wire the mechanical control, you will need to connect one of the mechanical control wires to the C terminal, and the other mechanical control wire to the NO terminal. You can use wire nuts or electrical tape to secure the connections. The mechanical control will act as a safety switch that will override the Ranco ETC-111000-000 if the temperature or pressure exceeds the set limit.

Step 4: Wire the Load Device

The fourth and final step is to wire the load device to the Ranco ETC-111000-000. The load device can be any device that consumes power and is controlled by the temperature sensor, such as a fan, a pump, or a heater. The Ranco ETC-111000-000 has a SPDT output relay that can switch on or off the load device based on the setpoint, differential, and mode of operation.

To wire the load device, you will need to connect one of the load device wires to the L1 terminal, and the other load device wire to the L2 terminal. You can use wire nuts or electrical tape to secure the connections. The load device will be powered by the line voltage and controlled by the Ranco ETC-111000-000.

Step 5: Program the Ranco ETC-111000-000

The last step is to program the Ranco ETC-111000-000 to suit your application. The Ranco ETC-111000-000 has a simple keypad that allows you to easily and accurately select the setpoint temperature, differential, and heating or cooling mode of operation. It also has a LCD display that shows the current temperature, control settings, relay status, and onboard diagnostics.

To program the Ranco ETC-111000-000, you will need to follow the instructions in the installation manual or watch this video tutorial. You can also refer to this table for a quick overview of the programming steps and options.

Step 6: Test the Ranco ETC-111000-000

The final step is to test the Ranco ETC-111000-000 to make sure it is working properly. You can use a multimeter to check the voltage and continuity of the wires and terminals, and observe the LCD display and the load device to verify the operation of the control. You can also use the diagnostic mode to troubleshoot any errors or faults that may occur.

To enter the diagnostic mode, you will need to press and hold the SET button for 10 seconds. The LCD display will show the following information:

The error codes are as follows:

To exit the diagnostic mode, you will need to press the SET button again.