Energy Saving - Daikin VAM-FA Technical Data Manual

2 Features

2 - 2 Energy Saving

By heat recovery operation
Approx. 20% reduction
of heating / cooling load
By setting to automatic
ventilation mode
Approx. 6% reduction
of heating / cooling load
By Precooling / heating operation
Approx. 2% reduction
of heating / cooling load
Total
28% reduction
of heating / cooling
load
NOTE
1 The total heating / cooling load may vary depending on the climate or the other environmental conditions.
• Heat reclaim ventilation • VAM-FA/FB
HRV unit recovers the thermal energy during cooling / heating operation of air
conditioner. HRV reduces the cooling / heating load drastically and enhances the
Exhaust 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
Cooling
Heating
Refer to the CONTROL for the mode changeover.
Exhaust Air
Outdoor Air
Exhaust Air
Outdoor Air
The load is reduced at startup of the air conditioner by the following control.
8:15
Air conditioner
HRV
Reduction of
heating / cooling
load (%)
• Ventilation • Heat reclaim ventilation
heating / cooling efficiency.
Heat Exchanger Element
(Heat Recovery)
Sensor of ventilation
Difference between
indoor / outdoor temp.
Indoor temp. > Outdoor temp.
Indoor temp. < Outdoor temp.
Indoor temp. > Outdoor temp.
Indoor temp. < Outdoor temp.
Heat Recovery mode
Heat Exchanger Element
(Heat Recovery)
Normal (Bypass) mode
Heat Exchanger Element
(Heat Recovery)
Before the working hour, the room air is clean.
Therefore, the startup of HRV can be delayed.
Working hour starts
9:00
ON
ON
Cooling / Heating
load is reduced
Normal HRV independent
operation operation
Return Air
Supply Air
(HC0230)
Decision of mode
(Which is more
energy efficient?)
Normal ventilation (Bypass)
Heat recovery ventilation
Heat recovery ventilation
Normal ventilation (Bypass)
Return Air
Supply Air
(HC0231)
Automatic
Changeover
Return Air
Supply Air
(HC0232)
Working hour ends
18:00
OFF
OFF
Interlocked
operation (HC0233)
3
1
2
5