Gas engines for air-conditioning appliances must not be connected to the gas supply piping in what manner to protect against vibration effects?

Gas engines for air-conditioning appliances should not be connected to the gas supply piping rigidly in order to protect against vibration effects. A rigid connection means that the gas piping is fixed in place without any allowance for movement or displacement. Since engines generate vibrations during operation, a rigid connection can transmit these vibrations directly to the gas supply pipes. This could lead to potential damage or failures in the piping system, increasing the risk of gas leaks or other hazards.

Using flexible connections in the gas supply allows for some degree of movement and absorption of vibration, which helps to maintain the integrity of the gas piping system. This flexibility helps to ensure that the pipes can withstand the dynamic forces generated by the engine without compromising safety. Thus, avoiding a rigid connection is essential for the longevity and safe operation of air-conditioning appliances powered by gas engines.