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HVAC
837
HVAC
The refrigerant flow through HVAC system is same as
that of A/C system.
The only difference is, in HVAC system, there is a
heater coil or heater core which functions as a heat
transfer unit for providing warm air.
Hot engine coolant is circulated through heater coil. A
blower is positioned in front of the heater core to blow
cold outside air over the core. As this air travels over
the heater core, it heats up and becomes the hot air
which blows through the vents.
For achieving different temperature, hot air fromheater
can be blended with cold air from evaporator.
HVAC
A -
Air direction mode selection knob
B -
Blower speed selection knob
C -
Temperature control knob
D -
AC ON / OFF switch
E -
Air recirculation / Fresh air lever
Recirculation
mode
Fresh Air
mode