Daikin RY24PEV1K Service Manual page 83

2) Vacuuming and leak test.
Caution:
If possible, it is better to use vacuum pump to discharge the air inside the piping and
indoor unit from the service port. The method of using vacuuming is as follows:
75
 Wrap connecting pipe and the joints that have not insulated with sponge and bind
them up with plastic tape.
 Remove the bonnets of gas valve and liquid valve.
 Aim at the center of the pipe and screw the nut of connecting pipe tightly with hands
 Screw nuts tightly with spanner.
 Remove check valve bonnet of gas valve.
 Unscrew the stem of gas valve for 1/4 circle with hexagon spanner and at the same
time, open the stem by screwdriver to discharge gas.
 Discharge the gas for 15s until gas of refrigerants appears. And then, shut the
check valve and screw the bonnet tightly.
 Open stem of gas valve and liquid valve completely ( as figure 3-1-4)
liquid
valve
 Screw the bonnet tightly and then detect if there is any leakage on the joint
connecting indoor and outdoor unit and pipeline by soap water and Leakage
detector.
 Take out the flare nut cover of the liquid and gas valve service port.
 Connect the manifold gauge to the vacuum pump, having the low-pressure end
linking to the gas valve and high-pressure and linking to the liquid valve. (As shown
in Figure 3-1-5)
gas
one-way
valve
valve
valve
inner
stem
hexagon
screwdriver
spanner
Figure 3-1-4
SiK401004_A
valve cap
INSTALLATION