Daikin VAM Series Engineering Data page 15

EDMMT712101
1.3.2 Energy Saving
By heat recovery operation
By setting to automatic
ventilation mode
By Precooling / heating operation
Note:
The total heating / cooling load may vary depending on the climate or the other environmental conditions.
VAM-HVE/HVLT Series
Heat Reclaim Ventilator (VAM series) recovers the thermal energy during cooling /
heating operation of air conditioner. Heat Reclaim Ventilator (VAM series) reduces the
cooling / heating load drastically and enhances the heating / cooling efficiency.
Exhaust Exhaust
Air Air
Outdoor
Air
Proper use of Heat recovery ventilation and normal ventilation saves energy.
When the cooling operation is required in winter, use of heat recovery ventilation is not
efficient because the outdoor air temperature is normally lower than that of the indoor.
Thus, the proper use of ventilation mode enhances the heating / cooling efficiency.
Automatic Ventilation mode changeover
Operation Sensor of ventilation
Difference between
indoor / outdoor temp.
Indoor temp. > Outdoor temp.
Cooling
Indoor temp. < Outdoor temp.
Indoor temp. > Outdoor temp.
Heating
Indoor temp. < Outdoor temp.
Refer to the CONTROL for the mode changeover.
Heat Recovery mode
Exhaust
Air
Outdoor
Air
Heat Exchanger Element
(Heat Recovery)
Normal (Bypass) mode
Exhaust
Air
Outdoor
Air
Heat Exchanger Element
(Heat Recovery)
The load is reduced at startup of the air conditioner by the following control.
Before the working hour, the room air is clean.
Therefore, the startup of Heat Reclaim Ventilator (VAM series) can be delayed.
Working hour starts
8:15
Air
conditioner
ON
Heat Reclaim
Ventilator
Cooling / Heating
(VAM series)
load is reduced
Product Introduction
Heat Exchanger Element
(Heat Recovery)
Decision of mode
(Which is more
energy efficient?)
Normal ventilation (Bypass)
Heat recovery ventilation
Heat recovery ventilation
Normal ventilation (Bypass)
Return
Air
Supply
Air
Return
Air
Supply
Air
9:00
ON
Return
Air
Supply
Air
Automatic
Changeover
Working hour ends
18:00
OFF
OFF
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