Heat Pump Sequence Of Operation
There are various kinds of heat pumps out there. When you are purchasing, one of the most important things you should look out for is their seasonal energy efficiency ratio (SEER) rating. It is this rating that determines the efficiency of the heat pump. The pumps that have high SEER numbers are usually more efficient compared to those with lower numbers. When you buy a heat pump that is more efficient, you will be able to save money as well as the earth.
Even though some manufacturers vary slightly when it comes to their heat pump sequence of operation, overall the sequence of operation is approximately the same for all manufacturers. During the heating operation, the thermostat switch closes and causes the compressor contactor as well as the blower motor in the air handler to be energized. This in turn causes the compressor contactor to close while the compressor itself energizes along with the condenser fan motor.
The refrigerant which is located inside the condenser absorbs heat from the outside air. The refrigerant is then transferred to indoors to the evaporator coil and it causes the blower to be energized. During the heating process, the speed of the fan is typically slower compared to its speed during air conditioning. Air from the indoor blower removes heat from the refrigerant vapor. The heat warms up the house. After enough heat has been removed from the refrigerant, the vapor condenses and forms a high pressure liquid that has a temperature that is slightly warmer compared to indoor air temperature.
During the cooling operation of a heat pump, the compressor pumps out the high pressure as well as the superheated refrigerant vapor. The vapor then leaves the compressor and goes through a reversing valve. It flows through the outdoor vapor line and goes to the outdoor coil. After this, air from the outdoor fan extracts heat from the refrigerant vapor. After enough heat has been removed, the vapor condenses and forms a high pressure liquid that has a temperature that is slightly warmer compared to the ambient air temperature.
The warm high pressure liquid flows from the outdoor coil and goes into the copper refrigerant liquid line. At the end of the liquid line, the refrigerant is taken through a metering device which causes its temperature and pressure to be reduced. It is then taken through an indoor coil surface that absorbs heat from it. This in turn causes the low pressure liquid to evaporate, something which causes the indoor air to be cooled.
If you want to save money while using the heat pump, it is advisable to buy one that has a compressor with two speeds. Such a heat pump will be quite effective when it comes to the compressor dealing with the heating and cooling actions. There are some heat pumps that are equipped with backup burners that may be so great when it comes to heating of the home during cold weather.