5 Operation
Operation manual
14
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688015-1C – 2022.09
4
Select
Paste
.
Delete
Edit
Copy
Paste
Result:
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
5
Repeat this action for all other weekdays.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
—
To program the schedule for Saturday and copy it to Sunday
1
Select
Saturday
.
2
Select
Edit
.
3
Use the left dial to select an entry and edit the entry
with the right dial.
0
8:00
23:00
--:--
22°C
20°C
--
12
24
Sat
4
Confirm the changes.
5
Select
Saturday
.
6
Select
Copy
.
7
Select
Sunday
.
8
Select
Paste
.
Result:
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
To rename the schedule
1
Select the name of the current schedule.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
2
Select
Rename
.
Delete
Rename
Select
3
(optional) To delete the current schedule name,
browse through the character list until
←
is
displayed, then press to remove the previous
character. Repeat for each character of the schedule
name.
4
To name the current schedule, browse through the
character list and confirm the selected character.
The schedule name can contain up to 15 characters.
5
Confirm the new name.
INFORMATION
Not all schedules can be renamed.
5.8
Weather-dependent curve
5.8.1
What is a weather-dependent curve?
Weather-dependent operation
The unit operates 'weather-dependent' if the desired leaving water
temperature is determined automatically by the outdoor temperature.
It therefore is connected to a temperature sensor on the North wall
of the building. If the outdoor temperature drops or rises, the unit
compensates instantly. Thus, the unit does not have to wait for
feedback by the thermostat to increase or decrease the leaving
water temperature. Because it reacts more quickly, it prevents high
rises and drops of the indoor temperature.
Advantage
Weather-dependent operation reduces energy consumption.
Weather-dependent curve
To be able to compensate for differences in temperature, the unit
relies on its weather-dependent curve. This curve defines how much
the leaving water temperature must be at different outdoor
temperatures. Because the slope of the curve depends on local
circumstances such as climate and the insulation of the house, the
curve can be adjusted by an installer or user.
Types of weather-dependent curve
There are 2 types of weather-dependent curves:
▪ 2-points curve
▪ Slope-offset curve
Which type of curve you use to make adjustments, depends on your
personal preference. See
"5.8.4 Using weather-dependent
15].
Availability
The weather-dependent curve is available for:
▪ Main zone - Heating
▪ Main zone - Cooling
▪ Additional zone - Heating
▪ Additional zone - Cooling
INFORMATION
To operate weather-dependent, correctly configure the
setpoint of the main zone and additional zone. See
"5.8.4 Using weather-dependent curves"
15].
