R32
Split Type - Air Source Heat Pump 20220105
62
charged in a liquid state.
After vacuum drying (see Part 3, 3.10 Vacuum Drying), the blue and red pressure gauge hoses should still
beconnected to the pressure gauge and to the outdoor unit stop valves.
Connect the yellow hose from the pressure gauge to the R32 refrigerant tank.
Step 3
Open the valve where the yellow hose meets the pressure gauge, and open the refrigerant tank slightly to
let
the refrigerant eliminate the air. Caution: open the tank slowly to avoid freezing your hand
Set the weighing scale to zero.
Step 4
Open the three valves on the pressure gauge to begin charging refrigerant. When the amount charged
reaches R (kg), close the three valves. If the amount charged has not reached R (kg), but no additional
refrigerant can be charged, close the three valves on the pressure gauge, run the outdoor unit. in cooling mode,
and then open the yellow and blue valves. Continue charging until the full R (kg) of refrigerant has been
charged, then close the yellow and blue valves. Note: Before running the system, be sure to complete all test run
and be sure to open stop valves as running the system with the stop valves closed would damage the
compressor.
