11. EXPLANATION OF COMPONENTS 11.13.4 PROCEDURE FOR REPLACING RECEIVER Replace the receiver every two years. After replacing the receiver, add compressor oil. When adding oil, place the receiver at an angle and measure the amount of oil remaining inside the receiver. Add the same amount of fresh oil (Densoil 6) to the receiver. REMARK The replacement interval may become shorter depending on the condition of use. If the receiver is used when the moisture absorption limit of the desiccant has been exceeded, the refrigerant circuit may become blocked and cause the compressor to break down.
PRECAUTIONS WHEN REPLACING RECEIVER If the blind cover of the receiver is left off for more than 15 minutes, the moisture in the air will be absorbed and the life of the desiccant will be shortened. If the blind cover is removed, connect the piping immediately, then evacuate the circuit and fill with refrigerant. When removing the refrigerant from the refrigerant circuit, re- move it gradually from the low pressure side to prevent the oil from flowing out. 11.13.5 CLEANING AIR FILTER If the air filter for the FRESH or RECIRC air intake becomes clogged, the cooling or heating capacity will drop. To prevent this, clean the air filter with compressed air once a week.
For details of the cleaning method, see “WHEN REQUIRED”. 11.13.6 CHECK COMPRESSOR BELT TENSION AND REFRIGERANT (GAS) LEVEL If the compressor belt is loose, or the refrigerant level is low, cooling is not carried out efficiently. For details, see “24.2 WHEN REQUIRED”. 2-28