15.7. Pumping of atmospheric air from air conditioning system

If the contour of air conditioning system was open and atmospheric air got to it, it needs to be pumped out, using the vacuum pump. If the system was open within several days, it is necessary to replace the receiver / dryer.

Start the pump and open both valves. Leave the pump to work within 15 min., then close valves and switch off the pump. The manometer of low pressure has to show more than 700 mm Hg and this pressure has to remain at the closed valves.

If low pressure does not reach more than 700 mm Hg within 15 min., in a contour of air conditioning system there is a leak.

If leaks in air conditioning system are not available, open valves and continue pumping out within the next 15 min. then close both valves and stop the pump.