Frequently Asked Questions: Temp Stats

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Frequently Asked Questions: Temp Stats

Written by: Jackson Systems



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Thermostat’s are becoming bigger, better, more expensive and a larger part of smart home automation. Smart thermostats can now integrate with home security systems, sync with playlists, turn the system on or off based on your location, and a list of growing features that continue to be implemented. The issue is, you don’t want to risk breaking expensive thermostats during the building process of a new home.

Temp stats are great solution for new building construction. They serve as a great placeholder for a new thermostat while maintaining a set temperature during construction. With a fixed temperature, quick installation and simple removal they are a fantastic option for a variety of reasons.

There’s a lot of confusion around the capabilities of these devices so we’ve gathered a list of frequently asked questions to answer all in one place. We’ll touch on the specs of the iO HVAC Controls temp stats and go over some common questions we frequently run into.

Temp Stat Facts

  • Patented and manufactured since 1997
  • A capacitor absorbs arc when the contacts open and close. This eliminates the production of heat which can cause the equipment to short cycle.
  • Plastic cover also prevents short cycling of equipment by slowing the thermostat response time down
  • Bi-metal gold ash contacts
  • Two tests done on the bi-metal component and sorted by temperature at the factory
  • Two more tests done in-house to ensure temperature differential is accurate
  • Approximately 1.5 degree temperature differential

Frequently Asked Questions

Q: How is a Temp-Stat wired?

A: It’s very simple. You just connect across the “W” and “R” terminals the same way you’d set up a heat-only thermostat.

 

Q: Is there any limitation on the thermostat wire run length?

A: No, a Temp-Stat is not an electronic sensor, it is a special bimetal thermostat with the same limitations of any other standard thermostat.

 

Q: What type of control circuit should be used with a Temp-Stat?

A: Use it with only 24 Volt control circuits with a maximum current of 1.0 Amp. Use a relay kit (CS-RY-115 or CS-RY-220) if controlling a line voltage circuit.

 

Q: How is a Temp-Stat wired for a heat pump?

A: Typically, the resistance heat is operated during construction; therefore Temp-Stat would be wired across “W” and “R”. Depending on the equipment, a jumper may be required between “W” and “G” at the air handler to control the fan; however, if the compressor is to be used for temporary heat, simply wire across “Y” and “R” (assuming the changeover valve is energized on a call for cooling).

 

Q: Can a simple switch be used in series with Temp-Stat to turn the furnace on and off?

A: Yes but the easiest way is to use the “ssu” switch that is almost always installed at the side of the furnace to turn it on and off.

 

Q: Can a Temp-Stat be used for cooling applications?

A: Yes however, a cooling version (CL-70, CL-75, CL-80) must be used because it “makes” on a rise in temperature. It is recommended that a 2-wire short cycle timer be installed in the control circuit of the cooling unit (some units may have this built in).

 

Q: What is expected life of a Temp-Stat?

A: You can expect a Temp-Stat to last as long as any other thermostat.

 

Q: Do heat, moisture and vibration cause any problems?

A: Heat and moisture do not affect Temp-Stats; however, vibration could cause it to work improperly. It is recommended that it not be mounted on any vibrating surface.

 

Q: What is the temperature differential of a Temp-Stat?

A: 11/2 Degree Fahrenheit

 

Q: What is the warranty?

A: Temp-Stats from iO HVAC Controls have a one year warranty.

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