Operation Principle - Haier AB072MRERA Service Manual

22.3 Operation principle

a. Operation type: forced air inlet—indoor positive pressure—air release
supply air—indoor minus pressure—forced discharging air
b. Heat exchange figure
c. Operation sketch map
When the heat exchange element is at the position as the figure, the unit is in heat reclaimed ventilation state; when
the heat exchange rotates, indoor return air will not pass the heat exchange element, and flow to outside directly,
that is bypass state.
Bypass state:
Discharging air Indoor return air
Heat exchange element Supply air
Outdoor air
Heat exchange element
Discharging fan
Indoor return air
Indoor return air flows to outdoor
Supply air to indoor
Outdoor fresh air
Air inlet fan
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