HVAC
39
Following table illustrates the amount of oil to be
replenish for respective HVAC/AC components
Replaced part
Amount of compressor oil to
be replenished (in CC)
Evaporator
(front)
25
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,
replenish 30cc oil.
vi. PRESSURE TEST USING MANIFOLD GAUG-
ES
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.
NOTE
Make sure following conditions are fulfilled before
getting the correct gauge readings (after engine has
warmed –up
)
Engine speed
1500 rpm
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)




