Daikin VAM-FA8VE Technical Data Manual page 216

2
8
8.2.5 Nighttime Free Cooling Operation <Automatic Heat Purge Function at Night>
214
• HRV • VKM-GA(M)V1
Example 2 :
In case of the remote controller "BRC1A62"
Display changes as below.
When air conditioner and HRV
unit are not connected via duct
<Operation mode>
VRV:
Cooling mode
HRV:
Heat exchange mode
VRV:
Fan mode
HRV:
Heat exchange mode
VRV:
Stopping
HRV:
Heat exchange mode
Note
Current Ventilation mode doesn't be displayed.
•
When the display shows "
(Refer to the chapter "MAINTENANCE").
The nighttime free cooling is an energy-conserving function which works at night when the air conditioners
is off, reducing the cooling load in the morning when the air conditioner is turned on by ventilating rooms
which contain office equipment which raises the room temperature.
•
Nighttime free cooling only works during cooling and when connected to Building Multi or VRV systems.
•
Nighttime free cooling is set to "off" in the factory settings; so request your dealer to turn it on if you
intend to use it.
Operation image
40
(a)
30
(b)
20
ON ON
OFF
Nighttime free cooling operation
OFF
22:00 24:00
EXPLANATION OF NIGHTTIME FREE COOLING OPERATION IMAGE
The unit compares the indoor and outdoor temperatures after the air conditioning operation stops for the
night. If the following conditions are satisfied, the operation starts, and when the indoor temperature
reaches the air conditioning setting, the operation stops.
<Conditions>
[1] the indoor temperature is higher than the air conditioning setting and
[2] the outdoor temperature is lower than the indoor temperature,
If the above conditions are not satisfied, reevaluation is made every 60 minutes.
• HRV • Heat Reclaim Ventilation
VRV:
Cooling mode
HRV:
Heat exchange mode
VRV:
Fan mode
HRV:
Heat exchange mode
" (time to clean air filter), ask a qualified service person to clean the filters
(a) Outside temperature
(b) Indoor temperature
(c) Set temperature
(d) Operating state of Air conditioner
(e) Operating state of Total heat exchanger
(c)
OFF OFF
(time)
Following morning
When air conditioner and HRV
unit are connected via duct
<Operation mode>