Ranco ETC-111000 Wiring and Programming Instructions

Ranco thermostats are relatively easy to wire up, even for the novice. However, if you have any doubts about your ability to do so, please order your unit pre-assembled. Better safe than sorry! I think that you will find that the savings of doing it yourself is not all that great and it is easier to purchase the pre-assembled unit. Pre-assembled units are also programmed for heating, differential and 85 degree temperature. All you will have to do is set them up and adjust your temperature setting to your needs.

The lockout switch is located on the inside of the case cover. It can be used to prevent tampering or accidental change of settings. MAKE SURE YOU UNPLUG THE UNIT BEFORE OPENING THE CASE! If you don't you may get an unpleasant reminder!

DIY Wiring Instructions

You will need the following: 5" of 12 gauge stranded insulated wire, (1) 15 amp power cord of your desired length (heavy duty extension cord works well), (1) outlet strip, (1) wire nut (rated for 2 14-12 ga. wires), (1) 3/8” wire clamp, electrical tape.

First you will need to disassemble the Ranco and install the cable clamp in the bottom of your housing. Next, you want to cut the plug off of the outlet strip leaving as much of the wire as possible. Strip away about 1/4" of insulation off of the three wires. You will also need to cut off the female end of your power cord if you are using an extension cord. Strip the ends of those wires as well. Insert the black wire from your heat source (or outlet strip) under the screw labeled "NO". Next, you will need to make a jumper wire. You want to make sure it is 12 gauge to handle the full power capacity of the Ranco Thermostat. It is important you do not go with too small a wire here or you will be in for trouble! You want to screw the jumper under the "120V" and "C" screws. The black wire from your power cord will also go under the "120V" screw with the jumper. Next, you want both of the white wires (heat source and power cord) under the "COM" screw. That should leave you with just 1 or 2 green wires depending on whether or not your heat source has a grounded (3 prong) plug or not. If there is just the green wire from your power cord you can simply tape the end so no bare wire is exposed. If you have 2 green wires you will need a wire nut of appropriate size to twist them together. Last, check all the screws are firmly tightened and your wire nut is secure. Reassemble your Ranco and you are ready to go!

Programming your Ranco etc 111000 Thermostat

Step 1: Press the set button, now select "F" for fahrenheit

Step 2: Press the set button a second time, set your desired teperature.

Step 3: Press the set button again, set your differential temperature to "1"

Step 4: Press the set button again, set the cooling/heating mode to "H1"

Your Ranco Thermostat is now ready to go!

These insructions are provided for informational purposes only. If you are not sure how to wire your thermostat please consult a professional or purchase your thermostat assembled. Reptile Basics Inc assumes no liability for the use of these instructions.