Subaru LEGACY 2002 - Modulator (RHD Model)

HVAC System (Heater, Ventilator and A/C)
MODULATOR (RHD MODEL)
AC-31
12.Modulator (RHD Model)
A: MECHANISM
The modulator incorporates a drier and a filter. It forms an integral part of the condenser.
The amount of circulating refrigerant varies as the heat load changes. The modulator functions as
a buffer to enable supply of refrigerant in an amount appropriate for each heat load condition.
The modulator also has the following functions:
1) It removes bubbles from the liquid refrigerant. (If bubbles are present, the refrigerant passing
through the expansion valve varies in quantity, temperature, and pressure, resulting in insufficient
cooling.)
2) It removes moisture from the refrigerant.
3) It removes foreign substance from the refrigerant.
The inside filter removes foreign substance and the drier absorbs moisture from the refrigerant.
(1) Drier
(2) Filter
(3) Cap
(4) Modulator
(5) Condenser
B4H1510A