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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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.
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All thermostats are mandated at 42" height for handicap accessibility, most private residences are mounted at 52-60".
Please see this video on how to install a WarmlyYours nSpiration Series thermostat.
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No, the RC-40AMP is controlled by a line voltage (120V/240V) thermostat.
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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.
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12k ohms floor sensor only
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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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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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| Connection Method | Hardwired |
| Floor Sensor Compatibility | 12k ohms |
| Voltage | 120 V |
| Country of Origin (COO) | Denmark |
| Depth | 2″ |
| Installed Depth | 0.75″ |
| Length | 0.1″ |
| Width | 0.1″ |
| SKU | OJ-DUAL |
| UPC (GTIN-12) | 881308010645 |