Heat pump thermostats require a 24V control signal that can be used in conjunction with a high-voltage control system for operation. The majority of thermostats are designed for this voltage, but some use lower voltage 24V control signals.
General
These types of heat pump thermostats are popular because they consume less power than most lines - which have an average of 24 volts. Low voltage thermostats are directly wired heaters and air conditioners that operate at 30 V in most homes. Most of the time, low voltage thermal conductors are wired in the same way as the direct-wired heating or air conditioning system you find in most homes. These high voltage thermostats are often built into the wall and typically have two or four thick wires coming out of it, such as a "C" wire.
Video
Features
When the heat pump thermostat draws heat, a signal is sent to power the stove, fan, fan, or boiler to heat your home. When the thermometer signals cooling, the terminal closes and activates the changeover valve to pump out heat, switching from the standard position of the heater to the position of cooling. When the last temperature change on a 24V heat pump causes a temperature change on the W terminal, signals are sent that drive the condensers and fans and fans to cool the house and then sent out again when you call for cooling.
Typical Wiring Diagram
Applications
Certifications
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