Daikin VAM-GVJU Manual page 35

Installation Manual
6. OA (Outdoor air from outside)
7. EA (Exhaust air to outside)
8. Round shape hood
9. PC board
10. ERV unit
• Power supply is turned ON when the ERV unit starts operat-
ing.
Power supply is turned OFF when the ERV unit is switched
OFF.
Power supply voltage
208V
230V
Required setting changes for switchover to X15A output
(see below for details)
• Wiring
Connect one end of the harness to X15A on the PC board
and the other end to the harness leading to the damper via a
connector such as a closed connector.
1
2
1. Control box cover
2. Open this way
3. Screws
4. To External damper
5. Power supply wiring
6. Transmission wiring
3
4
1. Control box Interior
2. Electric component mounting base
3. Harness (AWG20: accessory)
4. Closed connector (field supply)
5. PC board
6. Clamp (accessory)
With regard to a closed connector, select one that suits the wire
size.
Secure the harness with the other wires by using the clamp.
19
34
Connected load capacity
0.5A or less
6
3
4
5
1
2
X15A
5
6
• Setting changes
To make the X15A output available, change the field setting by
the remote controller as below.
Mode No.: 18 (group control) or 28 (individual control)
FIRST CODE NO.: 3
SECOND CODE NO.: 03
10-4-4 Nighttime free cooling operation
〈AUTOMATIC HEAT PURGE FUNCTION AT NIGHT〉
The nighttime free cooling is an energy-saving function which
works at night when the air conditioners are 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 VRV system.
• Nighttime free cooling is set to "off" in the factory setting; so
request your dealer to turn it on if you intend to use it.
Operation image
100
(a)
90
80
(b)
70
ON ON
OFF
Nighttime free cooling operation
OFF
22:00 24:00
Outdoor temperature
(a)
Indoor temperature
(b)
Set temperature
(c)
Operating state of Air conditioner
(d)
Operating state of ERV
(e)
EXPLANATION OF NIGHTTIME FREE COOLING OPERA-
TION IMAGE
The unit compares between the indoor and outdoor tempera-
tures 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 set-
ting, 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 temper-
ature,
If the above conditions are not satisfied, reevaluation is
made every 60 minutes.
NOTE
• The Nighttime free cooling operation works when the ERV
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.
EDUS711116
(c)
OFF OFF
(time)
Following morning
English
3P034928-7Q
VAM-GVJU