Daikin HXY080A8V1BF, Installation And Operation Manual

Page: 21 / 48

125A8V1BF
VRV IV System indoor unit
4P405267-1C – 2021.04
Installation and operation manual
19
Operation example : Schedule timer based on temperature set
points.
When setback function (refer to
"[2] Automatic setback function" on
page 19 ) is enabled, the setback operation will have priority over the
scheduled action in the schedule timer.
Operation example : Schedule timer based on ON/OFF instruction.
When setback function (refer to "[2] Automatic setback function" on
page 19 ) is enabled, the setback operation will have priority over the
scheduled action in the schedule timer if ON instruction is active. If
OFF instruction is active this will have priority over the setback
function. At any time the OFF instruction will have the highest priority.

[0 - 04] Status: defines whether the ON/OFF instruction can be
used in the schedule timer for cooling.
Same as for [0 - 03] but for cooling schedule timer.
For cooling, no setback function is available.
[1] Settings are not applicable
[2] Automatic setback function
Setback function provides the possibility to lower the room
temperature. The setback function can for instance be activated
during the night because the temperature demands during night and
day are not the same.

[2 - 00] Status: defines whether the setback function is turned ON
(1) or OFF (0)

[2 - 01] Start time: time at which setback is started

[2 - 02] Stop time: time at which setback is stopped
Setback can be configured for both room temperature control and
leaving water temperature control.
1 Schedule timer
2 Setback function
3 When both setback function and schedule timer are enabled
A Setback function
t Time
T Temperature set point
Room temperature
Leaving water temperature
Method 2 Space heating based on ON/OFF instruction
During operation When the schedule timer switches space heating OFF,
the controller will be switched off (operation LED will stop
working).
When pushing
the button
The schedule timer for space heating will stop (when
active at that moment) and will start again at the next
scheduled ON function.
The "last" programmed command overrules the
"preceding" programmed command and will remain
active until the "next" programmed command occurs.
Example: imagine the actual time is 17:30 and
actions are programmed at 13:00, 16:00 and
19:00. The "last" programmed command
(16:00) overruled the "previous" programmed
command (13:00) and will remain active until
the "next" programmed command (19:00)
occurs.
So in order to know the actual setting, one should consult
the last programmed command. It is clear that the "last"
programmed command may date from the day before.
Refer to the operation manual.
The controller will be switched off (operation LED will
stop working).
However the schedule timer icon will stay displayed.
When pushing
the button
The schedule timer for space heating will be stopped and
will not start again.
The schedule timer icon will not be displayed anymore.
T
t
6:30 9:00
16:00
0:30
19C 19C 19C
22C
21C
42C 42C 42C
45C
44C
42C
19C 19C 19C
22C
21C
42C 42C
45C
44C
0:30
1
T
t
18C
37C 37C
18C
A
5:00 23:00 5:00 23:00
2
T
t
5:00 9:00
16:00
23:00
19C
18C
19C
22C
21C
42C
40C
42C
45C
44C
40C
19C
18C
19C
22C
21C
42C
19C 19C
42C 19C
42C 19C 19C 19C
42C
45C
44C
6:30
3
37C 37C
40C 40C
1 Schedule timer
2 Setback function
3 When both setback function and schedule timer are enabled
A Setback function
B ON/OFF instruction
t Time
T Temperature set point
Room temperature
Leaving water temperature
INFORMATION

By default the setback function is enabled.

The setback function can be combined with the
automatic weather dependent set point operation.

Setback function is an automatic daily scheduled
function.
t
18C
40C
40C
18C
A
5:00 23:00 5:00 23:00
2
B
t
9:00
16:00
19C 19C
22C
21C
42C 42C
45C
44C
19C 19C
22C
21C
42C 42C
45C
44C
1
OFF ON ON
6:30 0:30
B
t
6:30 9:00
16:00
23:00
19C 19C
22C
21C
42C 42C
45C
44C
19C 19C
22C
21C
42C 42C
45C
44C
3
OFF ON ON
18C
40C
40C
18C