4 Operation
User reference guide
9
EA9W
Daikin Altherma – Low temperature split
4P556076-1 – 2018.10
t
60°C
00:00
07:00
50°C
15°C
40°C
14:00
21:00
1
2
3
4
Tt
T
t
DHW tank temperature
t
Time
4.5.3
Scheduled mode
In scheduled mode the DHW tank produces hot water corresponding
to a schedule. The best time to allow the tank to produce hot water is
at night, because the space heating demand is lower.
Example:
t
60°C
00:00
07:00
50°C
15°C
40°C
14:00
21:00
1
2
3
4
5
Tt
T
t
DHW tank temperature
t
Time
▪ Initially, the DHW tank temperature is the same as the
temperature of the domestic water entering the DHW tank
(example:
15°C
).
▪ At 00:00 the DHW tank is programmed to heat up the water to a
preset value (example: Comfort
= 60°C
).
▪ During the morning, you consume hot water and the DHW tank
temperature decreases.
▪ At 14:00 the DHW tank is programmed to heat up the water to a
preset value (example: Eco =
50°C
). Hot water is available again.
▪ During the afternoon and evening, you consume hot water again
and the DHW tank temperature decreases again.
▪ At 00:00 the next day, the cycle repeats.
4.5.4
Sch reheat mode
In scheduled + reheat mode, the domestic hot water control is the
same as in scheduled mode. However, when the DHW tank
temperature drops below a preset value (=reheat tank temperature –
hysteresis value; example: 35°C), the DHW tank heats up until it
reaches the reheat set point (example: 45°C). This ensures that a
minimum amount of hot water is available at all times.
Example:
t
Tt
60°C
00:00
07:00
50°C
45°C
15°C
14:00
21:00
35°C
1
2
4
5
3
T
t
DHW tank temperature
t
Time
4.5.5
To change the domestic hot water
temperature
In Reheat only mode, you can use the room temperature setpoint
screen to read out and adjust the domestic hot water temperature.
1
Go to [5]: Tank.
You can read out the desired and actual room
temperature in the center of the setpoint screen.
2
Turn the right dial to adjust the domestic hot water
temperature.
In other modes, you can only view the setpoint screen but not modify
it. Instead, you can modify the settings for the Comfort setpoint [5.2],
Eco setpoint [5.3] and Reheat setpoint [5.4].
4.5.6
Using DHW powerful operation
About powerful operation
Powerful operation allows the domestic hot water to be heated by
the backup heater. Use this mode on days when there is more hot
water usage than usual.
To check if powerful operation is active
If
is displayed on the home screen, powerful operation is active.
Activate or deactivate Powerful operation as follows:
1
Go to [5.1]: Tank > Powerful operation
2
Turn powerful operation Off or On.
Usage example: You immediately need more hot water
You are in the following situation:
▪ You already consumed most of your domestic hot water.
▪ You cannot wait for the next scheduled action to heat up the
domestic hot water tank.
Then you can activate powerful operation. The domestic hot water
tank will start heating up the water to the Comfort temperature.
INFORMATION
When powerful operation is active, the risk of space
heating and capacity shortage comfort problems is
significant. In case of frequent domestic hot water
operation, frequent and long space heating interruptions
will happen.
4.6
Advanced usage
The amount of information you can read out in the menu structure
depends on your user permission level:
▪ User: Standard mode
▪ Advanced user: You can read out more information
To change the user permission level
You can change the user permission level as follows:
1
Go to [B]: User profile.
2
Enter the applicable code for the user permission.
—
▪ Move the cursor from left to right.
▪ Browse through the list of digits and change the
selected digit.
▪ Confirm the pincode and proceed.
Advanced user pin code
The Advanced user pin code is
1234
. Additional menu items for the
user are now visible.
Summary of Contents for Altherma EAVZ16S23DA6V
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