Aqua-ammonia absorption system with varible speed burner

An aqua-ammonia absorption cooling and/or heating apparatus comprising:

• an absorber assembly, a generator assembly and a variable speed or multiple speed burner, a condenser, an evaporator, a refrigerant loop for directing refrigerant between said absorber assembly, generator assembly, condenser and evaporator, an absorption fluid loop for directing absorption fluid between said absorber assembly and said generator assembly, said absorption fluid loop including first piping for directing ammonia-rich absorption fluid from the absorber assembly to the generator assembly and second piping for directing ammonia-weak absorption fluid from the generator assembly to the absorber assembly, and one or more first valves cooperating with the second piping for controlling the flow rate of weak absorption fluid therein, and a sensing device in sensible contact with ammonia-weak absorption fluid in the generator assembly for opening and/or closing the one or more first valves in response to the sensed temperature, and/or pressure and/or concentration of the ammonia-weak absorption fluid.