Daikin VRV III Manual page 35

Features
FRESH-UP Operation
Both the excessive supply mode and the excessive exhaust mode are selectable.
This function creates a more comfortable air environment.
Supply air volume can be set at a higher level than the
Detail
exhaust air by the remote controller.
Prevents inflow of toilet odor
Major Prevents inflow of outdoor air in winter
effects
Application
Example
Portion of
fresh up
operation
Nighttime free cooling operation
〈AUTOMATIC HEAT PORGE 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
40
(a)
30
(b)
20
ON ON ON
OFF
Nighttime free cooling operation
OFF
22:00 24:00
(a) Outside temperature
(b) Indoor temperature
(c) Set temperature
(d) Operating state of Air conditioner
(e) Operating state of Total heat exchanger
30
Supply Fresh-up
(Excessive outdoor air supply)
Offices, etc.
Air supply
HRV
Air exhaust
ex. <Office>
(c)
OFF OFF OFF
(time)
Following morning
(Excessive exhaust air supply)
Exhaust air volume can be set at a higher level than the
supply air by the remote controller.
Prevents outflow of airborne bacteria from rooms in a
hospital
Prevents outflow of odors from rooms in a nursing
home
Normal
Portion of
ventilation fan
exhaust operation
Air supply
Air exhaust
(HC0009)
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, revaluation is made
every 60 minutes.
NOTE
• The nighttime free cooling operation works when the HRV
unit is off. Therefore, it is not possible to stop the nighttime
free cooling operation, though the forced off is input from
the optional controllers for centralized control.
: http://splitoff.ru/tehn-doc.html
Exhaust Fresh-up
Hospitals, Nursing homes, etc.
HRV
Sick room Floor area
ex. <Hospital>
General Information
ED34-862
(HC0010)