Snow and Ice Melting WiFi Control


Part Number: SCW-120-15A
This support page provides publications, manuals, specifications, videos, support articles, and common support questions


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Common Support Questions (34)

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Publications and Manuals (9)

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Common Support Questions


Never cut the heating cable. A heating cable will not work if it has been cut. If the heating cable is too long, call WarmlyYours to consult with a technician who will guide you in utilizing the additional length of cable.

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The material costs are similar. However, electric systems are easier to install, with fewer components and significantly lower maintenance costs. Electric systems will run for a shorter period of time to give the same level of performance but with much higher energy efficiency (typically 95%-98% efficient). Controls and sensors required for the two types of systems are very similar. Electric systems do not usually require slab insulation and do not create the concerns typically associated with hydronic systems. These concerns include, but are not limited to, return temperatures, flue gas venting, waterway shrinkage and property damage caused by leaking pipes or tubes.

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Yes. The manufacturer's splice that connects the heating element to the cold lead should be entirely embedded in a noncombustible material (like asphalt, concrete, or mortar) within the outdoor surface that is being heated. 

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Never cross, overlap, or allow the heating cables to touch each other. Doing so will quickly cause a circuit failure due to excessive heat build up. Always follow the product instructions and/or design layout plan to ensure the cable is installed with the correct spacing required for proper operation.

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The electrician may shorten the cold lead wires during the installation. Any lead wire extensions/splices must be made in a junction box in accordance with the installation instructions, and must comply with all national and local electrical codes. Never cut the heating cable.

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Power requirements are measured in Amps and based on three factors: the watts per sq. ft. of the snow melting cable or mat, the area powered and the voltage used for the application. Our product is rated at 50 watts per sq. ft., so that is a constant factor. Most snowmelt projects are powered with 240V AC – not all, but most. The one factor that is always variable is the area to be heated/powered. That is based on your project. For a point of reference, let’s use the example above of a 350 sq. ft. concrete patio.

The formula is (50 W/sq. ft. x area of 350 sq. ft.) / V (240V) = Amps, so 17,500 / 240V = 72.9 Amps

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That depends on a number of variables (like the temperature outside) but generally speaking these snow melting systems are designed to melt 1" - 3" of snow per hour. Anything above 3" per hour is typically considered blizzard conditions. 

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Our systems can handle low temperatures, but many controls come equipped with a Low-Temperature Lockout Feature. This feature prevents the system from running in very low temperatures. At very low temperatures it can become difficult for the system to effectively melt the snow. It is however possible to turn off this feature should you need the system to keep running during such low temperatures.

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If a cable is damaged during installation, recheck the system for continuity and confirm the integrity of the insulation with a megohmmeter, or "megger" tester, referring to the installation and testing instructions. If the cable fails any of these tests, take the following actions: clear a 3 foot square working area around the damaged section of cable, and record the cable part number from the UL tag and the location where you purchased the product. Call WarmlyYours with the above information. WarmlyYours will provide further assistance and supply a splice kit suitable for repairing the particular cable.

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To calculate the system's approximate operating costs, multiply the total kilowatts of the system by the cost per kilowatt in your area. Let's use the example of a 350 sq. ft. of concrete patio (residential application), with 240 VAC.

Total Watts: multiply area in sq. ft. x 50 Watts
350 x 50 = 17,500 Total Watts

Kilowatts: (the unit in we purchase electricity) take the Total Watts and divide by 1000
17,500 Total Watts / 1000 = 17.5 Kilowatts.

Kilowatt Rate: use the national average of .12 cents per Kilowatt-hours so how much do we pay for 17.5 kWatts?
17.5 kW x .10 = $1.75 for every full hour of operation.

Hours of Operation: We use a typical 6 hour snowfall for our example.
$1.75 x 6 hours = $10.50 for that snowfall.

All of this will vary due to "after-run time". "After run time" is where the system remains on extra hours after the snow has completed falling, to ensure complete pavement snow melting and drying.

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To ensure optimal performance, snow melting heating elements should be installed so that they are consistently 2"-3" from the finished surface. For installations using pavers, the maximum thickness for pavers installed over heating elements is 2.5". 

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Pavers can be removed and reinstalled for a retrofit application of our snow melt system. Tire tracks are not typically recommended for paver surfaces, so any retrofit application would most likely need to be full coverage. In this case, it should be treated like a brand new installation, just with existing pavers.

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Always confirm the power requirements with the electrician. Large snow melting systems usually require a new electrical panel or electrical service. Contact WarmlyYours for a quotation, indicating the actual power capacity available, and to obtain recommendations for reducing the power consumption. For example, opting for tire track coverage rather than installing the snow melting system over the entire driveway can dramatically reduce power requirements.

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If you are able to connect the mobile device to the Decora Smart Wi-Fi device (Step 2), but are getting a message that the device is unable to enroll please follow these troubleshooting step:

  1. Factory Reset the Decora Smart Wi-Fi device by pressing and holding the top paddle for 15 seconds (until the LED begins to flash red and amber), then release the paddle. After a few seconds, the LED will flash green.
  2. Pay attention to the Status LED during the remainder of the enrollment process. When you get to the step where the device joins your Wi-Fi network (right after you select your Wi-Fi network and enter the password):
    What is the color and state on the LED?
    • If the LED is solid green (or turns completely off if the light it is controlling is on), then please follow the steps in the following article: Device Does not Connect to Cloud
    • If the LED flashes amber, please make sure that you are entering the correct password for the Wi-Fi network that you are connecting to. The password is case specific. You can press the eye icon to see the text to make sure you entered it correctly.
  3. If your router has 2.4GHz and 5GHz Wi-Fi signals on the same Network Name (SSID), try splitting these out into different Wi-Fi network names.
    • For example, if you router uses the same Network Name (SSID) for both the 2.4GHz and 5GHz band. The modification is to change the name of the 5GHz SSID, so that it has a different name from the name of the 2.4GHz SSID. The recommendation is to add the number 5 to then end of the existing name. For example, if the name of your SSID is Jones, then change the name of the 5GHz SSID to Jones5.
  4. Attempt to enroll the device again after following all of these steps to see if you are successful. If not, please contact our technical support team at dssupport@leviton.com. Please include the type model number of the Decora Smart device and the brand and model of your wireless router.
  5. For additional help, you can call our support department.

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When the design requirement's amp draw exceeds the selected controller's capacity.

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If the app has scheduled turning on/off the towel warmer, it will override the manual setting.

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In an area free of obstruction and able to detect rain or snow, yet low enough so that it is easily accessible if service is needed. Atop a fence post or on an 'L' bracket on the side of a building are common.

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This type of installation should not significantly affect the longevity of the driveway. Be sure to have a professional for your surface material type evaluate this during installation.

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All of our automatic controllers have a Hold-on time feature after the initial warming up of the snow melt system. This feature ensures that all the snow is melted from the surface, and also that the system continues to operate and evaporate the surface water without it refreezing.

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The layer of noncombustible material needed below snow melting heating elements must be at least 2" deep. 

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Each heating cable comes with a factory installed cold lead wire that must be routed through the rigid metal 3/4" conduit to a outdoor rated junction box where a simple wire nut connection can be made for the electrical hook-up.

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This NEC-required protection for fixed outdoor deicing and snow-melting equipment may be accomplished by using circuit breakers equipped with ground-fault equipment protection (GFEP) of 30 mA. It is important to understand that this required equipment protection is not the same as a 5 mA GFCI used for personal protection.

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Before you begin, please verify that you are attempting to enroll a Decora Smart Wi-Fi device. The first 2 characters of a Decora Smart Wi-Fi device is DW (e.g. DW15S, DW6HD, DW15P, etc.). If the device begins with a DHor DZ (e.g. DH15S, DZ15S, etc.), it is not a Decora Smart Wi-Fi device and cannot be used with My Leviton.If you are having trouble connecting your Decora Smart Wi-Fi device to your Wi-Fi network, take note of where the failure is occurring during the process (as described below), and follow the troubleshooting procedures for that step in the process. Refer to this article for all of the steps in the process: Add a Decora Smart Wi-Fi Device to the My Leviton App

Also, make sure that the mobile app that you are using is named My Leviton. Other Leviton mobile app, such as Decora Smart Home or Decora Digital Dimmer & Timer cannot be used for Decora Smart Wi-Fi devices.

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In Step 2 of the process, where you attempt to connect directly to the Decora Smart Wi-Fi device that is listed in the Wi-Fi networks (it will be listed in the format of Leviton Device-xxxx), instead of connecting you receive a message stating it is "unable to connect" or simple never connects (e.g. no check mark next to the device).
If the device connects and you see this screen, skip to Decora Smart Wi-Fi device will not connect to the Wi-Fi Network or Leviton Cloud.
If the mobile device does not connect to the Decora Smart Wi-Fi device at this step, please follow these troubleshooting step:

  1. Make sure you have the latest version of the My Leviton App. To ensure that you are running the latest version of the app, check for a My Leviton app update on the Apple App store or Google Play store.
  2. If available, try using a different mobile phone or tablet running the My Leviton app. Follow Steps 1 and 2 and see if you are able to connect to the device. If you are able to connect, see if you can complete the process.
  3. Contact our technical support team at dssupport@leviton.com. Please include the type and model of mobile devices you are using and the model number of the Decora Smart device.

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If the WiFi switch is not functioning to the My Leviton app's schedule or settings, it is recommended to either update the firmware of the WiFi switch from the Leviton app or, reset the WiFi switch by turning it on/off at the circuit breaker controlling the switch.

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Once you've decided what type of heating system (manual vs. automatic), you'll need to choose a control, which may or may not utilize a sensor. You may need a relay panel(s) depending on the size of the system, and a snow melt plaque which is required by the National Electric Code. Junction box(es) may be optional depending on the distance of heating cable from the indoor power location.

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A properly designed and installed system will handle most snow melting demands. Some snow events may have a very rapid snow fall rate, and some may not. No 2 events are ever exactly the same. Our system typically can melt 1“-2“ of snow per hour, on average. However, it is important to understand that a system may not melt snow at very cold temperatures. This is simply because the system cannot generate enough BTUs to overcome the heat loss generated by very low temperatures.
In order to estimate cost of operation, the Warmly Yours Electric Snow Melting Operating Cost Calculator is a useful tool that can help illustrate what it would cost to operate the system.

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This feature prevents the snow melting system from running, by default, in temperatures below 17°F (–8.33°C), or as set by the user. At temperatures this low, it becomes difficult for the system to effectively melt the snow. It is, however, possible to turn off this feature should the system be required to keep running during these low temperatures.

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No, a sensor is not required with the snow melt system. However, certain automatic controllers require a temperature/moisture sensor to sense atmospheric conditions and may also require an in-slab, high temperature limit sensor to be installed (notably, asphalt installations).

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Ground fault equipment protection (GFEP) is intended to provide protection for equipment against damaging line-to-ground currents by disconnecting all ungrounded conductors of the faulted circuit.

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It depends on how the system is intended to operate. If the expectation is manual operation (ex. WiFi or Timer Control), then no sensors are required. If the expectation is automatic operation, then the system will require at least one snow sensor.

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The electrician must route the cold lead(s) through rigid metal conduit(s) or other approved means, to get back to an accessible weatherproof junction box(s). Care must be taken by the electrician so that none of the heated section of Cable enters the conduit(s).

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Minimum is 1.5“ and Maximum is 2.5“

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Publications and Manuals



Specifications


Warranty / Certifications

Approvals cULus listed
Warranty 2 years

Electrical

Connection Method Hardwired
Maximum Current Description 15A @ 120V Amps Max Load
Maximum Load (Resistive Only) 15A @ 120V
Voltage (Input) 120 VAC

Features

Control Remotely via iPhone, Android or Web App true

Identifiers

SKU SCW-120-15A
UPC (GTIN-12) 881308064433

Connectivity

Voice Control Works with Amazon Alexa and Google Assistant voice assistants (sold separately)
Works with IFTTT, Amazon Alexa, Google Assistant

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