Daikin VAM350FC, Руководство по установке, Страница: 24 / 29

Installation manual
21
VAM350~2000FC
Total Heat Exchanger
HRV (Heat Reclaim Ventilation)
4P415947-1A – 2017.08
Balancing supply and air exhaust
With the VAM FC, it is possible to balance the pressure of the supply
and exhaust air via settings. This ensures an optimal heat exchange
efficiency.
Refer to the technical data book for pressure drop curves and
selection of fan curves (step "1" to "15" refer to
"List of Settings" on
page 13 ).
Set the mode to "19" for group control, or "29" for individual control.
Use settings switches "2" and "3" to adjust.
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. This is
mainly for rooms that contain office equipment, which raises the room
temperature.

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
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 temerature.
If the above conditions are not satisfied, reevaluation is made every
60 minutes.
Test run
After completing the installation of the system, check again to make
sure that no error was made in wiring or switch setting on the printed
circuit boards of the HRV units.
Then, turn on the power of the HRV units. Refer to the manual of the
remote controller of each unit (remote controller for air conditioner,
central control unit, etc.) for conducting a trial operation.
NOTES
The Nighttime free cooling operation works when the
HRV unit is off. Therefore, it is not possible to stop the
night purge operation, though the forced off is input
from the optional controllers for centralized control.
40
30
20
22:00 24:00
(d)
(e)
(a)
(b)
(c)
(a)
Outside temperature
(b) Indoor temperature
(c) Set temperature
(d) Operating state of Air conditioner
(e) Operating state of Total heat exchanger
Operating state
Te
mpe
ratur
e (ºC)
(time)
Following morning
OFF
OFF
OFF ON
Nighttime free cooling operation