10T8Y1B
VRV-W IV System Air Conditioner
4P399208-1 – 2015.01
Installation and operation manual
49
6.2.
Program dry operation
The function of this program is to decrease the humidity in your
room with minimal temperature decrease (minimal room
cooling).
The micro computer automatically determines temperature and
fan speed (cannot be set by the user interface).
The system does not go into operation if the room temperature
is low (<20°C).
6.2.1
For systems without cool/heat changeover remote
control switch
Starting the system
1
Press the operation mode selector button on the user interface
several times and select
(program dry operation).
2
Press the ON/OFF button of the user interface. The operation
lamp lights up and the system starts operating.
3
Press the air flow direction adjust button (only for Double-flow,
Multi-flow, Corner, Ceiling-suspended and Wall-mounted). Refer
to
"6.3. Adjusting the air flow direction" on page 49
for details.
Stopping the system
4
Press the ON/OFF button of the user interface once again. The
operation lamp goes out and the system stops operating.
6.2.2
For systems with cool/heat changeover remote control
switch
Starting the system
1
Select cooling operation mode with the cool/heat changeover
remote control switch.
2
Press the operation mode selector button on the user interface
several times and select
(program dry operation).
3
Press the ON/OFF button of the user interface. The operation
lamp lights up and the system starts operating.
4
Press the air flow direction adjust button (only for Double-flow,
Multi-flow, Corner, Ceiling-suspended and Wall-mounted). Refer
to
"6.3. Adjusting the air flow direction" on page 49
for details.
Stopping the system
5
Press the ON/OFF button of the user interface once again. The
operation lamp goes out and the system stops operating.
6.3.
Adjusting the air flow direction
Refer to the operation manual of the user interface.
6.3.1
Movement of the air flow flap
For the following conditions, a micro computer controls the air flow
direction which may be different from the display.
The air flow direction can be adjusted in one of the following ways:
The air flow flap itself adjusts its position.
The air flow direction can be fixed by the user.
Automatic
and desired position
.
6.4.
Setting the master user interface
1
VRV IV water-cooled unit
2
VRV direct expansion (DX) indoor unit
3
BS box
4
User interface (dedicated depending on indoor unit type)
INFORMATION
The heating capacity drops when the supply water
temperature falls. If this happens, use another heating
device together with the unit. (When using together
with appliances that produce open fire, ventilate the
room constantly).
Do not place appliances that produce open fire in
places exposed to the air flow from the unit or under
the unit.
It takes some time to heat up the room from the time
the unit is started since the unit uses a hot-air
circulating system to heat the entire room.
If the hot air rises to the ceiling, leaving the area
above the floor cold, we recommend that you use the
circulator (the indoor fan for circulating air). Contact
your dealer for details.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
1
1
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
Double flow+multi-flow units
Corner units
Ceiling suspended units
Wall-mounted units
COOLING
HEATING
• When the room temperature is
lower than the set temperature.
• When continuous operation with
downward air flow is performed
with a ceiling-suspended or a
wall-mounted unit, the micro
computer may control the flow
direction, and then the user
interface indication will also
change.
• When starting operation.
• When the room temperature is
higher than the set temperature.
• When operating continuously at horizontal air flow direction.
NOTICE
The movable limit of the flap is changeable. Contact
your dealer for details. (only for double-flow, multi
flow, corner, ceiling-suspended and wall-mounted).
Avoid operating in the horizontal direction
. It
may cause dew or dust to settle on the ceiling or flap.
5
2
2
3
1
A
B
C
5
2
2
2
2
5
3
3
3
2
5
5
5
5
2
2
5
5
