Heat pumps are efficient heating and cooling systems that transfer heat from one place to another. They are composed of various components, including compressors, refrigerant lines, and blowers. The blower circulates air throughout the building. In some heat pump systems, a heat sequencer is used to manage the activation of the blower and heating elements. Contact us today to discuss your heat sequencer switch needs.
When the thermostat detects that the indoor temperature has fallen below the set point, it sends a signal to the heat sequencer to initiate the heating process. The sequencer contains a small heating element that begins to warm up when it receives the signal from the thermostat. This heating element heats a bimetallic disc inside the sequencer, causing it to bend as it heats up. As the bimetallic disc bends, it closes electrical contacts in a specific sequence. These contacts are connected to different components of the heat pump system. The first sets of contacts turn on the pumps heating elements, while the final set of contacts turns on the blower. This staggered activation ensures that the heating elements have time to warm up before the blower starts circulating air, preventing cold air from being blown into the living space. Once the blower motor is activated, it circulates the warm air throughout the building.
When the desired room temperature is reached, the thermostat signals the heat sequencer to shut off the pump’s heating element & blower. The heating element in the sequencer cools down, causing the bimetallic disc to bend the opposite way and open the electrical contacts.
By controlling the timing of the activation of heating elements and the blower motor, the heat sequencer prevents a sudden surge in electrical current. This is crucial for maintaining the stability.
