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nSpire Touch Programmable Thermostat (UDG4-4999)

nSpire Touch Programmable Thermostat (UDG4-4999)

Part Number: UDG4-4999
The nSpire Touch thermostat offers all the things you expect from a smart touchscreen thermostat – intelligent, adaptive control and intuitive operation.
This support page provides publications, manuals, specifications, videos, support articles, and common support questions
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Support Questions

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How to figure out the Kilowatt Load usage for your WarmlyYours floor heating system?

On the new touchscreen thermostat UDG4-4999, during the startup menu, users will be prompted to enter their KW load usage. Floor Load is the total wattage of the floor heating system that can be found on the installation or electrical plan. A lot of our customers may not know this for a number of reasons (they did not install or order the floor, it may be a replacement, and info on the installation has been lost, etc.) Here is an easy way to help out and get the Kilowatt load they need for this menu step.

Kilowatt load usage can be figured by taking the square footage of the open floor space multiplied by 15 (for tile) or 12 (for carpet and laminate). This gives us the total wattage which we then divide by 1000 to get the Kilowatts.

An example: the user has a 100-square-foot room that is tiled. The math would look like this: 100 sq feet X 15 watts per square foot = 1500 divided by 1000 = 1.5 KW

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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.

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In theory, it is possible, if no other options are available. We do not recommend it, but If the thermostat is controlling the floor temperature with a floor sensor, then it can go on an exterior wall. It is important that the floor sensor gets located in an area of the floor not hit by sunshine.

If the thermostat will be controlling the air temperature with the built-in ambient sensor, then it should go on an interior wall.

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The default is 10k. If this is a new installation, that is the answer. In the very rare occasion that this is replacing an older Energy stat (eg. square OJ Microline from before 2010 with red and green sensor wires), choose 12k. If this is a replacement for the other 99% of the thermostats WarmlyYours sold (Honeywell TH115 and TH111 thermostats), 10k is the value.

Always start with the default 10kΩ and change later if needed.

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The ground wire in the floor mat must be connected directly to the ground wire of the supply or to the house ground wire.

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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.

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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.

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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.)

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Check the connections between the thermostat and power module. If the power module is connected incorrectly to the thermostat, the power module won't switch off.

USG Power Module Connection Diagram


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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.

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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.

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Yes, the Touch and Wifi units will keep the time, there is a back up battery that will last quite a long time.  No need for resetting the clock in event of power outage.

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Yes, this model is dual-voltage and compatible with both 120V and 240V systems. However, ensure your supply voltage matches the voltage requirement of your specific floor heating element (e.g., do not connect 240V power to a 120V heating mat).

For a visual guide on these thermostats, you might find this video helpful:
... OJ Microline UWG4 and UDG4 Touch thermostats overview ...

This video details the features and installation concepts for the UWG4/AWG4 series, confirming its dual-voltage capabilities.

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No, the RC-40AMP is controlled by a line voltage (120V/240V) thermostat.

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Yes, the floor sensor wire can be extended up to 300 feet with 18 AWG wire.

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Yes the adaptive function is reset during a factory reset.

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- If we aren’t using it for floor, how do we handle the Load Measurement. Do we set that to on or off?

If you do not desire the reporting feature, turn it off.

- For set the floor load, what do we put there?

If you desire the reporting feature, enter the result of your panel's wattage divided by 1000. For example, the Ember Flex Radiant Panel Heater - 700W parameter would be set to .7

- Set floor protection - what do we put in there, “disabled”?

Yes, since the radiant panel is not reliant on an external floor sensor it should be disabled.

- For the Ember Flex panels, do they actually heat up and cool down based on the set point/target temperature? We’ve been running them on timer plugs and they seem to either be all on or all off.

You are correct, they operate as an on/off operation. The panels in this configuration will run until the ambient set temperature is achieved.

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To unlock WarmlyYours nSpire Touch Programmable Thermostat from child lock mode: Connect the dots on the touch screen to make the letter "L".

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This indicates a fault, current to ground. The thermostat has cut off the power for your safety. Please contact your local electrician or WarmlyYours Technical Support.

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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.

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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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Follow the on-screen instruction to reset the GFI by pressing the lower right side button.

If the unit continues to trip please contact Tech Support at +1 (800) 875-5285

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Specifications

Warranty / Certifications

Approvals cULus listed
Ingress Protection (IPxx) Rating IP20
Warranty Limited 3-year warranty and lifetime technical support

Electrical

Battery 5-year battery backup of clock and calendar
Connection 4 wires, double pole
Connection Method Hardwired
Dual Voltage t
Ground Fault Protection GFCI, Class A, 5 mA
Ground Fault Protection (GFCI) Class A, 5 mA
Maximum Current 15 A
Maximum Load (Resistive Only) 1800 W - 120 V, 15 A / 3600 W - 240 V, 15 A
Maximum Power 1800 W @ 120 V, 3120 W @ 208 V, 3600 W @ 240 V
Supply 120 VAC - 50/60Hz, 240 VAC - 50/60Hz

Appearance

Color White

Product Dimensions

Depth 2″
Installed Depth 0.75″
Length 5.125″
Weight 0.6 lbs
Width 3.25″

Controls

Display Backlit Display
Display Size 2″ W x 3″ H (3.5″ Diagonal)
Languages English, French, Spanish

Thermostat

Floor Sensor Compatibility 10k ohms, 12k ohms and custom
Included Floor Sensor 10k ohms, 15' lead
Maximum Ambient Temperature Setting 77 °F
Maximum Floor Temperature Setting 104 °F
Minimum Ambient Temperature Setting 32 °F
Minimum Floor Temperature Setting 41 °F
Temperature Rise Limit in Laminate Floor Protection ~10°F/hr (~5.58°C/hr)

Identifiers

SKU UDG4-4999
UPC (GTIN-12) 881308052850

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