1) It is recommended that the brazing of copper pipes be made with an inert gas flow (Nitrogen) inside them, avoiding the formation of oxidation residues (scale) or other impurities in the refrigeration circuit. When brazing the pipe in the evaporator coil, protect the tray from heat, preventing damage to it.
2) The leak test must be done with a maximum pressure of 250 PSIG. Use pressure regulator on the nitrogen cylinder. We recommend disconnecting the low pressure switch to avoid future leakage problems.
3) To evacuate the interconnecting pipes and units, connect the vacuum pump to the pressure taps on the service valves of the liquid and suction lines, so that we have simultaneous evacuation from the high and high sides.
low pressure.
4) It is recommended to partially charge the refrigerant through the liquid line using the pressure tap on the service valve.
