Faceplate screw for MYSa WiFi Thermostat. Programmable

Faceplate screw for MYSa WiFi Thermostat. Programmable
Part Number: MYSA-SCREWPast Model
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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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The H2 error is a result of the Mysa brand thermostat sensing an open heating circuit. To complete the heater circuit:

  • The Mysa’s LOAD 1 connection must make contact with one heater connection;
  • And the Mysa’s LOAD 2 (N) wire must make contact with the other heater connection.  There is no polarity in WarmlyYours heating elements.

If these connections are good, please test the heater circuit with a digital ohm meter. 

Here is the guide for single conductor heating systems:  https://www.warmlyyours.com/en-US/publications/OHM-READING-30032-A

Here is the guide for twin conductor systems:  https://www.warmlyyours.com/en-US/publications/TZ-TWIN-OHM-READING-30033-A

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Off-mode means that Mysa thermostat won't be sending power to the floor heaters. The Mysa thermostat will still be on but won't be turning the heaters on. This setting can be enabled on the Mysa thermostat itself or in the Mysa app.
On the Mysa thermostat: Hold down the down arrow until you see three dots on the display. Let go of the down arrow. The thermostat is now in off mode.
In the Mysa app: Tap the tile of the Mysa thermostat you'd like to turn off. Press the icon in the bottom left corner and a pop-up menu should appear. Tap off-mode, which is visually represented by a plug.

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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 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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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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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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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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If the Mysa thermostat is unresponsive to touch and/or commands, there are a few things you can check:

  • Make sure the protective plastic film has been removed from the thermostat, as this could interfere with the thermostat's ability to detect touch.
  • If that didn't work, try a power cycle - turn the breaker connected to the thermostat off and then back on again.
  • The last thing you can do is to make sure the ground wire is securely fastened to the ground screw in the gang box because this can sometimes cause the touch buttons to not function properly.
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By default, the Mysa thermostat will shows and control the floor temperature. However, you can choose to have the Mysa display and control the air (or ambient) temperature. The Mysa app will show air and floor temperature simultaneously.

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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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Yes, Mysa supports the majority of existing in-floor sensors. If you already have a sensor installed in your floor prior to the installation of the thermostat, please be sure to determine the resistance of your thermistor to ensure it's compatibility with the Mysa- this can be done using an ohmmeter which will display the resistance (eg. 10KΩ). If you want to install a sensor before the Mysa thermostat arrives, we recommend installing a standard 10KΩ sensor.

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Yes. As the Mysa thermostat pulls current to power the heater, the unit itself warms up a little bit. The regular temperature of a Mysa thermostat housing normally varies between 35°C and 50°C (95°F and 122°F). So it's perfectly normal for the Mysa thermostat to be warm while it's controlling your heating system.

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No. This film is just meant to protect the display from scratches during shipping and installation. To remove the film, gently lift up one of the corners and slowly peel the film off.

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If your brightness is set to 10% and you have to constantly turn the thermostat back on, try changing the brightness to 20%. This is a HomeKit issue because HomeKit sets the inactive brightness to half of the active brightness, therefore if the brightness is set to 10%, half of it is 5%. The Mysa thermostat only has the ability to change the brightness in 10% increments, so a setting of 5% would turn off the thermostats. If you find yourself having any other brightness issues, try turning off the breaker and turning it back on again.

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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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Documents

Specifications

Logistics

Country of Origin (COO) China

Identifiers

SKU MYSA-SCREW

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