Installation and operation manual
31
EWAQ016~ EWYQ016~064BAW
Packaged air-cooled water chiller
4PW70082-1C – 2013.07
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.
The setback function is configured through field settings. Refer to the
chapter "6. Field settings" on page 38 for a detailed description how
to set one or more field settings.
■
[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
■
[5-02] Leaving water setback temperature (temperature drop)
A
Normal leaving water temperature set point
B
Leaving water setback temperature
t
Time
T
Temperature
5.6.
Other operation modes
5.6.1.
Start up operation (
)
During start up, the
icon displays, indicating that the heat
pump is starting up and is not working in a steady state condition.
5.6.2.
Defrost operation (
)
(only for EWYQ units)
In space heating operation, freezing of the outdoor heat exchanger
may occur due to low outdoor temperature. If this risk occurs, the
system goes into defrost operation. It reverses the cycle and takes
heat from the water system to prevent freezing of the outdoor system.
After a maximum of 15 minutes of defrost operation, the system
returns to space heating operation. During defrost operation, space
heating operation is not possible.
5.6.3.
Quiet mode operation (
)
Quiet mode operation means that the unit works at reduced
compressor speed so that the noise produced by the unit drops. This
implies that it will take longer till the required temperature set point is
reached. Beware of this when a certain level of heating is required
indoors.
Selecting quiet mode operation
1
Use the
button to activate quiet mode operation.
The
icon displays.
If the controller is set to permission level 2 or 3 (refer to "Field
settings" in the installation manual), the
button is not
operable.
2
Press the
button again to deactivate quiet mode operation.
The
icon disappears.
There are 3 different levels of quiet mode operation. The desired
quiet mode is set through a field setting. Refer to the chapter "6. Field
settings" on page 38 for a detailed description how to set one or more
field settings.
5.7.
Temperature read-out mode
On the remote controller, the actual temperatures can be displayed.
1
Push and hold the
button for 5 seconds.
The leaving water temperature is displayed (icons
and
and are blinking).
2
Use the
and
buttons to display:
■
The entering water temperature (icons
and
are
blinking and the icon is flashing slowly).
■
The indoor temperature (icons
and
are blinking).
■
The outdoor temperature (icons
and
are blinking).
3
Push the
button again to leave this mode. If no button is
pressed, the remote controller leaves the display mode after 10
seconds.
INFORMATION
■
Remark that the icon will be flashing during setback
operation.
■
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.
[2-01]
[2-02]
B
A
T
t
45
°
C
40
°
C
5
°
C [5-02]
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