ALTROZ SERVICE MANUAL

HVAC 35 d) REPLENISHING COMPRESSOR OIL (a) While re-installing the Original Compressor 1. Drain and measure the refrigerant oil contained in the compressor. 2. Charge oil through the discharge port of the com- pressor with the same amount of new refrigerant oil. NOTE If the amount of oil in the original compressor was not checked, then approximately 70±10 ml. of new oil should be added to the compressor being in- stalled. (This is assuming the compressor being installed has first been drained). (b) While installing a New Compressor A new compressor (1) comes with a certain amount of oil (A) sealed in it. When replacing the old com- pressor (2) with a new one; an amount of oil (C) as calculated below should be drained from the new compressor. “C” = “A” -“B” “C” = Amount of oil to be drained “A” = Amount of oil sealed in a new compressor (1) “B” = Amount of oil remaining in old compressor (2) NOTE As it is necessary to replenish oil by approximately the same amount which is remaining in old compres- sor, draining of additional oil from the New Compressor becomes necessary. Following table illustrates the amount of oil to be replenished for respective HVAC/AC com- ponents Replaced part Amount of compressor oil to be replenished (in CC) Evaporator (front) 25 Evaporator (Rear) 20 Condenser 40 Hoses 10 Pipes 10 NOTE When only charging refrigerant without replacing any component, replenish the same amount of measured oil when recovering refrigerant, if not measured, re- plenish 30cc oil. CAUTION: Specify SP10 oil for compressor Top-Up. e) PRESSURE TEST USING MANIFOLD GAUGES This is a method where trouble is detected and re- paired by using manifold gauge. The manifold gauge indicates the refrigeration cycle high and low pres- sure side pressures on the respective gauge. NOTE Make sure following conditions are fulfilled before getting the correct gauge readings (after engine has warmed –up ) Engine speed 1500rpm A/C inlet temperature (Ambient Temperature) 30° - 35° C (86° - 95° F) Blower speed High Temperature Control Full cold Reference value be- fore AC operation at both high and low pressure sides 5-8 kg/ cm 2 (0.5 - 0.8 MPa)