DISCHARGING, EVACUATING, CHARGING AND CHECKING — Charging Refrigerant (Cont'd) / Inspection for Refrigerant Leaks
HA-21prose procedureCharging Refrigerant (Cont'd)
Preliminary check for refrigerant leaks
- 1Make sure that the gauge manifold valve is closed.
RHA601B - 2Check for refrigerant leak from each connector in the system using the leak detector.
IMPORTANT
At this point, the pressure in the system is not high. Only large amounts of refrigerant leak due to loose pipe joints, etc. can be detected.
Charging refrigerant
- 1Slowly open high pressure valve of manifold gauge, and charge calculate amount of refrigerant in "CALCULATING CHARGING AMOUNT OF REFRIGERANT".The refrigerant in charging cylinder is kept in liquid state, so the refrigerant should be charged from high pressure side. Do not start engine with high pressure valve kept open.
- 2Close high pressure valve of manifold gauge.
- 3Make sure that the calculated amount of refrigerant remains in sight glass.
- 4Close charging cylinder outlet valve.
- 5Turn off heater if it is on (when using heater equipped).
Inspection for Refrigerant Leaks
WORK PROCEDURE
To facilitate inspection for refrigerant leaks, establish the following conditions:
Unknown block type: list
IMPORTANT
Refrigerant leaks should be checked immediately after stopping engine, beginning with high pressure line, using a gas leak detector. This is because the pressure in high pressure line drops gradually after refrigerant circulation stops while the pressure in low pressure line rises gradually as shown in the graph at left. Leaks can be detected easily when pressure is high.