NANO

HVAC 855 HVAC PRESSURE TEST USING MANIFOLD GAUGES This is a method where trouble is detected and repaired by using manifold gauge. The manifold gauge indicates the refrigeration cycle high and low pressure side pressures on the respective gauge. (a) Under Normal operation manifold gauge should show following readings: NOTE: Make sure following conditions are fulfilled before getting the correct gauge readings (after the engine has warmed - up) Engine Speed 1500 rpm A/C inlet temperature 30° - 35° C (86° - 95° F) Blower Speed Hl Temperature control Maximum cooling Reference value before AC operation at both 5-8 kg/ cm 2 (0.5 - 0.8 MPa) high and low pressure sides