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How is the R290 propane heat pump marketed as the refrigerant? What requirements must the device meet in order to be approved for use in our country?
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Any fluid loss will be demonstrated with pressure loss indicated by manometer. In case of open circuit, you can also check the level of compression vessel.
ReadThis temperature is possible, if the heat exchanger gets dirty and boiler has been in operation for few hours at total output (at low outdoor temperature). In this case clean the boiler and check...
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