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Heat Pump Performance Features
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Heating & Cooling 101
If the heat pump system in your home is the primary source for heating and cooling your home, you may want to choose one that offers performance and reliability features. Several important factors are included below:
— The compressor is often referred to as the heart of a heat pump. This device pumps and compresses the refrigerant that provides the heating and cooling benefits of a heat pump. All Goodman® brand high-efficiency units feature scroll compressors offering lower sound ratings compared to reciprocating compressors. Scroll compressors also contain up to 70% fewer moving parts. Goodman brand energy-efficient models use a mix of scroll and reciprocating compressors optimized for the application.
— A factory-installed filter drier traps moisture and other contaminants in the liquid refrigerant that could be detrimental to the function and longevity of the heat pump. It is a standard feature on all Goodman brand products.
— The factory-installed crankcase heater is wrapped around the base of the compressor and provides multiple functions. When the heat pump is shut down in colder ambient conditions, the crankcase heater reduces liquid refrigerant migration in the compressor shell by keeping the refrigerant at a temperature higher than the coldest part of the refrigerant system. System oil will generally migrate to the warmest part of the refrigerant system. By keeping the compressor warm the crankcase heater helps to keep oil in the compressor where it is needed. Not only does this protect the compressor but noise reduction is achieved by preventing liquid refrigerant accumulation in the compressor shell.
— Designed to protect the heat pump compressor from the damage of liquid refrigerant flood-back conditions, an accumulator stores excess liquid refrigerant and only allows refrigerant vapor to enter the compressor. Basically, the accumulator acts as a storage vessel. By storing and converting outlet refrigerant to a vapor, the accumulator protects against long-term damage to the compressor commonly called ‘slugging’.
— Similar to the muffler on the exhaust system of a car, the discharge muffler on a heat pump reduces transient conditions that cause vibration affecting the operational noise of a heat pump. A discharge muffler also helps to minimize the pulsations occurring between the cooling and heating modes of a heat pump. Mufflers on Goodman brand heat pumps have been up-sized to minimize noise caused by higher operating pressures associated with the R-410A refrigerant.
— When the refrigerant charge or pressure in a heat pump system is low, this switch activates and stops the operation of the heat pump to minimize potential damage to the compressor. A heat pump system that is low on refrigerant will not provide adequate heating or cooling. Further, low or loss of pressure can cause freezing of the condenser coil which drastically hinders the performance of a heat pump. This silent guard stands ready to operate only when needed to help protect the heat pump’s compressor from damage.
Compressor Sound Blanket
— The sound blanket insulates against the normal operating sound of the compressor. But not all sound blankets are created equal. Unless it’s constructed of high-density, thick foam and other materials, it may not provide the same level of sound insulation.
SmartShift™ Defrost Transition Control
— This feature helps to increase compressor reliability and reduces the noise level during heat pump systems defrost cycles. When outdoor temperatures fall below freezing and the heat pump is forced to initiate a defrost cycle, SmartShift simply turns off the compressor for 30 seconds allowing the system pressure to equalize and then restarts the compressor. This seamless operation is triggered automatically, eliminating unwanted noise caused by heat pump defrost changeover cycles.
— Since this refrigerant does not contain chlorine, it is considered to be more environmentally friendly compared to R-22 refrigerant. Introduced in 1995, R-410A has helped to increase the durability and reliability of compressors.
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