A capacity control device was originally patented by a company called Rawal about 20 years ago. This device allows for refrigerant to bypass back to compressor plus has both hot gas and liquid reinjection to maintain an optimal temperature in the evaporator coil. This allows the air conditioning system to stay on longer (not overshoot and undershoot temperatures as much) at the correct temperature. Keeping the compressor on longer helps wring additional moisture out of the air and this device helps maintain humidity better in the space. iAIRE can install this device in a customer provided unit.
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