Haier AB072MRERA - Operation Principle

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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 gure
c. Operation sketch map
When the heat exchange element is at the position as the gure, the unit is in heat reclaimed ventilation state; when
the heat exchange rotates, indoor return air will not pass the heat exchange element, and ow to outside directly,
that is bypass state.
Bypass state:
Air inlet fan
Supply air to indoor
Indoor return air
Heat exchange element
Indoor
Discharging fan
Indoor return air ows to outdoor
Outdoor
Outdoor fresh air
Indoor return air
Supply airHeat exchange element
Outdoor air
Discharging air
Outdoor fresh air
Outdoor fresh air
Indoor discharging air