10-S20
L3130 · L3430 · L3830 · L4630 · L5030, WSM
CABIN
Charging an Empty or Partially Charged System (Vapor)
This procedure is to charge the system through the LO pressure
side with refrigerant in the vapor state. When the refrigerant
container is placed right side up, refrigerant will enter the system as
a vapor.
CAUTION
• Never open the HI pressure valve of manifold gauge while
the engine is running.
NOTE
• Do not turn the refrigerant container upside-down when
charging the system by running the engine.
• Put refrigerant container into a pan of warm water (maximum
temperature 40 °C (104 °F)) to keep the vapor pressure in the
container slightly higher than vapor pressure in the system.
1. Check that the HI pressure valve (5) is closed.
2. Start the engine and set an approx. 1500 min
−1
(rpm).
3. Turn on the A/C switch.
Set the temperature control lever to maximum cooling position
and the blower switch to HI position.
4. Open the LO pressure valve (6) of manifold gauge and the can
tap valve (1) on refrigerant container and charge the refrigerant
until air bubbles in the sight glass of the receiver vanish.
5. After charging the specified amount of refrigerant into the system,
close the LO pressure valve (6) of manifold gauge and can tap
valve (1), then stop the engine.
6. Check for gas leak with an electric gas leak tester (see page 10-
S11).
(Reference)
• Specified amount of refrigerant (total) :
900 to 1000 g (2.0 to 2.2 lbs) [Refrigerant R134a]
• Manifold gauge indication at fully charged system (at ambient
temperature : 30 °C (86 °F))
HI pressure side : 1.27 to 1.66 MPa
13 to 17 kgf/cm
2
185 to 242 psi
LO pressure side : 0.15 to 0.20 MPa
1.5 to 2.0 kgf/cm
2
21 to 28 psi
W1019245
(1) Can Tap Valve
(2) LO Pressure Gauge
(3) HI Pressure Gauge
(4) Compressor (Running)
(5) HI Pressure Valve (Close)
(6) LO Pressure Valve (Open)
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