Installation and operation manual
19
EWAQ016~ EWYQ016~064BAW
Packaged air-cooled water chiller
4PW70082-1C – 2013.07
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.
Refer to "[5] Automatic setback" on page 20 for temperature set
points.
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 along with the quiet
mode will be stopped and will not start again.
The schedule timer icon will not be displayed anymore.
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
t
18
18
°
C
40
40
°
C
40
°
C
18
°
C
A
5:00
5:00
23:00
23:00
5:00
23:00
2
B
t
9:00
16:00
19
19
°
C
19
19
°
C
22
22
°
C
21
21
°
C
42
42
°
C
42
42
°
C
45
45
°
C
44
44
°
C
19
°
C
19
°
C
22
°
C
21
°
C
42
°
C
42
°
C
45
°
C
44
°
C
1
OFF
ON
ON
6:30
0:30
B
t
6:30
9:00
16:00
23:00
19
19
°
C
19
19
°
C
22
22
°
C
21
21
°
C
42
42
°
C
42
42
°
C
45
45
°
C
44
44
°
C
19
°
C
19
°
C
22
°
C
21
°
C
42
°
C
42
°
C
45
°
C
44
°
C
3
OFF
ON
ON
18
18
°
C
40
40
°
C
40
°
C
18
°
C
INFORMATION
Only for EWYQ units operating in heating mode.
Setback function for cooling does not exist.
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.
A
Normal room temperature set point
B
Room setback temperature [5-03]
t
Time
T
Temperature
A
Normal leaving water temperature set point
B
Leaving water setback temperature [5-02]
t
Time
T
Temperature
[2-01]
[2-02]
A
B
T
t
21
°
C
18
°
C
[2-01]
[2-02]
B
A
T
t
45
°
C
40
°
C
5
°
C [5-02]
4PWEN70082-1C.book Page 19 Wednesday, September 25, 2013 7:31 AM
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