Daikin VAM-FA8VE, Technical Data Manual

Page: 216 / 282

2
8
214
• HRV
•
VKM-GA(M)V1
• HRV
•
Heat Reclaim Ventilation
Example 2 :
In case of the remote controller “BRC1A62”
Display changes as below.
Note
Current Ventilation mode doesn’t be displayed.
•
When the display shows “ ” (time to clean air filter), ask a qualified service person to clean the filters
(Refer to the chapter “MAINTENANCE”).
8.2.5 Nighttime Free Cooling Operation <Automatic Heat Purge Function at Night>
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
(a) Outside temperature
(b) Indoor temperature
(c) Set temperature
(d) Operating state of Air conditioner
(e) Operating state of Total heat exchanger
„
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.
When air conditioner and HRV
unit are not connected via duct
VRV:
Cooling mode
HRV:
Heat exchange mode
VRV:
Fan mode
HRV:
Heat exchange mode
VRV:
Stopping
HRV:
Heat exchange mode
<Operation mode>
VRV:
Cooling mode
HRV:
Heat exchange mode
VRV:
Fan mode
HRV:
Heat exchange mode
When air conditioner and HRV
unit are connected via duct
<Operation mode>
OFF
ON ON
OFF
OFF OFF
40
30
20
(time)
Following morning
22:00 24:00
(d)
(e)
Oper
ating state
T
emper
ature (˚C)
Nighttime free cooling operation
(a)
(b)
(c)