nHance Programmable Thermostat (UDG)
This support page provides publications, manuals, videos, support articles, and common support questions for the nHance Programmable Thermostat product line.
Main Products
Do you need support or specifications for a specific model? Identify your model below.
Common Support Questions
What breaker and wire size do I need to use for a floor heating system?
The breaker and wire sizes are selected based on the total amperage of the WarmlyYours heating system connected to a single thermostat. This information is on the WarmlyYours heating system's installation plan, electrical plan, or UL label. Based on guidelines from the National Electrical Code: loads up to 16 Amps may utilize 12 gauge wire with a 20-Amp breaker, and loads up to 12 Amps - 14 gauge wire with a 15-Amp breaker. Local code and/or other factors may change these guidelines.
6 people found this helpful. Did you find this helpful? Yes NoHow many square feet of floor heating can be connected to one thermostat?
One thermostat can control multiple heating mats/cables as long as all the heating elements are using less than 15 amps:
TempZone™ will cover aprx. 120 sq. ft. for 120V systems and 240 sq. ft. for 240V systems on one thermostat.
Environ™ will cover aprx. 150 sq. ft. for 120V systems and 300 sq. ft. for 240V systems on one thermostat.
Slab Heat will cover aprx. 90 sq. ft. for 120V systems and 180 sq. ft. for 240V systems on one thermostat.
5 people found this helpful. Did you find this helpful? Yes NoHow do I turn off the OJ Microline?
Pressing and holding (2-3 sec) physical power/reset button will turn the unit completely OFF. Same process turns the unit back on.
(nHance and nJoin units will have the button on the front faceplate, nSpire Touch WiFi, nSpire Touch and nTrust will have the button on the right side of the faceplate.)
1 person found this helpful. Did you find this helpful? Yes NoIs installing reflective insulation effective for making an electric radiant floor heating or snow-melting system more efficient?
Reflective insulation is not effective with conductive heating, which is how embedded floor heating and snow-melting systems transfer heat. To be effective, the reflective insulation surface needs to face an air space (air gap), which allows the reflected heat to be redirected.
An effective solution considers the insulating material's R-Value. This is the rating of a material's insulating properties. The "R" stands for "resistance" and refers to the material's resistance to heat flow, or temperature conduction.
1 person found this helpful. Did you find this helpful? Yes NoWhat does the Ground Fault Circuit Interrupter (GFCI/GFEP) do that the Circuit Breaker doesn't?
A GFCI/GFEP (Ground Fault Circuit Interrupter / Ground Fault Equipment Protection) works differently than a circuit breaker by specifically detecting a small imbalance in electrical current between the hot and neutral wires, which indicates a potential ground fault (like a person touching a live wire), and instantly shutting off the power to prevent shock, while a circuit breaker only trips when there's a significant overload in current flow on the circuit, like a short circuit or too many appliances plugged in.
1 person found this helpful. Did you find this helpful? Yes NoWhy do relays fail?
Relays can fail due to excessive current or voltage. When a relay is exposed to too much current, the contacts can burn out. High voltage can also damage the coil. Other reasons include mechanical wear and tear, dust or dirt buildup, and moisture. These factors can cause the relay to malfunction or stop working entirely. Regular maintenance and using the relay within its specified limits can help prevent failures.
1 person found this helpful. Did you find this helpful? Yes NoWill a circuit breaker protect against a power surge?
No, a circuit breaker will NOT protect against a power surge; a circuit breakers primary function is to protect against excessive current flow (overload), while a surge protector is specifically designed to handle voltage spikes, which are what power surges are considered to be.
How to unlock the child lock on WarmlyYours nHance Thermostat (UDG-4999)
How is the slab heating system controlled?
You can control your slab heating system with any WarmlyYours nSpiration Series thermostat. Depending on the size of your project, you may also need to add a relay or nJoin power module.
Did you find this helpful? Yes NoAt what height is the thermostat mounted?
Can the Relay Contactor (RC-40AMP) be controlled by a low voltage thermostat?
Can the floor sensor wire be lengthened or extended?
Does the adaptive function reset when making a factory reset?
Floor heating system thermostat does not appear to be working, what should I do?
Turn the power (circuit breaker typically) to the thermostat off for 5 minutes and then back on to reset the thermostat.
If there is power to the thermostat and it still doesn't appear to work, then the next step toward a solution is to take Ohm measurements of the floor heating system.
This is done with a digital multi-meter that can select a low 200 Ohm (Ω) scale. To conduct this test, turn off the circuit breaker. Remove the thermostat completely from the wall and disconnect the wires connected to the LOAD connections at the back of the thermostat. Disconnect the ground wires from the house ground, and do the test shown on the links below. If you are uncomfortable doing this test, contact a qualified electrician.
Please follow one of these guides based on the type of heating system installed:
For a quick overview of the testing process:
Here is a video showing how the test is done
Here is a video showing how to locate and identify the floor heating wires
If the system still does not function, contact +1 (800) 875-5285 WarmlyYours Technical Support and provide the Ohm measurements for further assistance.
Did you find this helpful? Yes NoHow do you make the USG (nJoin USG-4000 power module) shut off when the thermostat switches off?
The GFI Red Light is permanently ON
The OJ Microline thermostat reads a higher temp than the actual floor temperature
This could be due to one of the following:
a.) The higher temp reading might be due to a rubber bottomed / heavy rug, or piece of furniture placed over the floor sensor. This would trap heat over the sensor making it read a higher value than the rest of the floor –- Remove the item trapping the heat over the floor sensor.
b.) If the thermostat indicates a strange, higher measurement. Then more than one (1) floor sensor may have been hooked up to the thermostat -- Disconnect the extra sensor(s) and leave just one pair of wires hooked up (terminals C+D) to the thermostat.
c.) The floor sensor calibration may have been changed -- This setting should NEVER be changed, do a thermostat factory reset: Installer and User resets to clean this up.
d.) Is the OJ Microline thermostat used on a very old floor heating system? Some of the older systems, particularly the ones using an OJ Dual / Energystat thermostat had 12kΩ sensors in the floor -- Change the installer setting to read a 12kΩ floor sensor, instead of the default 10kΩ floor sensor.
If further assistance is needed, please contact WarmlyYours technical support.
WarmlyYours nSpire or nHance Thermostat E2 Error message: "External wired floor sensor disconnected, defective, or short-circuited. Contact your installer for reconnection or replacement"
Error code "E2" means defective, damaged, or not connected floor sensor. Check connections or replace the sensor if necessary.
Sensor resistance should be in 8kΩ-15kΩ range and can be tested with a digital multimeter on a 20k scale. If the sensor resistance is out of range, it could be damaged. Please note, only one floor sensor can be connected to a single thermostat.
Did you find this helpful? Yes NoWhere to connect the ground wire of floor mats/cables?
Why are the digits flashing on my nTrust UTN4-4999 non-programmable thermostat?
The flashing digits indicate that the actual (measured) floor temperature exceeds the thermostat temperature limit.
The temperature limit is set for either tile (104°F/40°C) or laminate (82°F/28°C) when the thermostat is first set up or re-configured.
For example: When the floor type (protection) is set to laminate, the limit defaults to 82°F/28°C. If the floor temperature goes above this - whether due to radiant floor heating or external heating sources, then the digits will flash and the heating is switched off.
Turning the temperature up or down will not affect the flashing digits. And leaving the thermostat alone with flashing digits does not harm the system.
Tip: To turn off the heated floor (ex. for months when it is not needed), on the outer edge of the thermostat, depress the lower right side button for 3-5 seconds. This will also turn it back on.
Did you find this helpful? Yes NoWhy does a GFCI (Ground Fault Circuit Interrupter) fail?
GFCI can fail for various reasons, such as wear and tear, moisture, corrosion, power surges, faulty wiring, or improper installation. Some of these causes can be prevented by regular inspection and maintenance, while others may require professional assistance. It is important to note that GFCI devices (ex. thermostat, breakers, outlets) should be tested regularly as these do wear out over time.
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