No, it is not possible to install a gas air conditioner (AC) without connecting the gas pipe. Gas air conditioners, also known as absorption air conditioners, use a heat-driven refrigeration cycle that relies on the circulation of a refrigerant gas, usually ammonia, which is mixed with water. This mixture is known as the refrigerant solution.
The gas pipe is an essential component in a gas AC system as it supplies the necessary fuel, typically natural gas or propane, to power the absorption process. Without the gas pipe connection, the AC unit would not have the fuel required to generate the cooling effect.
It is important to note that gas air conditioners are not as common as the more traditional electric air conditioners, which use compressors to cool the air. Gas AC units are typically used in specific situations, such as in RVs or in locations where electricity is not readily available or costly. If you are unsure about the installation process or have specific requirements, it is recommended to consult with a professional HVAC technician for guidance and assistance.