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4 Operation
User reference guide
11
EHBH/X04+08+16CA + EHVH/X04+08+16CA
Daikin Altherma - Low Temperature Split
4P313778-1B – 2012.11
t
60°C
00:00 07:00
50°C
15°C
40°C
14:00 21:00
1
2
3
4
5
T
t
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: Storage comfort = 60°C).
During the morning, you consume hot water and the DHW tank
temperature decreases. As long as the DHW tank temperature
stays above 40°C, hot water is available.
At 14:00 the DHW tank is programmed to heat up the water to a
preset value (example: Storage 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.
In scheduled mode, you can do the following:
You can… Location
Read out the active or next scheduled desired
temperature.
DHW tank
temperature
home page
Overrule the active or next scheduled desired
temperature.
Condition:
is displayed on the DHW tank
temperature home page.
Activate the DHW tank booster mode.
Select a DHW tank temperature schedule. Menu structure
Program a DHW tank temperature schedule.
Define preset values that are used by the
DHW tank temperature schedule.
(Only for EHBH/X)
Program a booster heater allowance schedule
to restrict when the booster heater can operate.
Example: Only allow the booster heater to operate
during the night.
(Only for field supplied domestic hot water
pump for secondary return)
Program a domestic hot water pump schedule
to determine when to turn ON and OFF the pump.
When turned ON, the pump runs and makes sure
hot water is instantly available at the tap. To save
energy, only turn ON the pump during periods of
the day when instant hot water is necessary.
See also:
"4.5.5 Using the DHW tank temperature home page" on page 11
"4.5.6 Using the DHW tank booster mode" on page 12
"4.7 Preset values and schedules" on page 15
4.5.4 Scheduled + 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; example: 45°C),
the DHW tank heats up until it reaches the preset value. This
ensures that a minimum amount of hot water is available at all times.
Example:
t
T
t
60°C
00:00 07:00
50°C
45°C
15°C
40°C
14:00 21:00
1
2
43
In scheduled + reheat mode, you can do the following:
You can… Location
Do the same things as in scheduled mode.
Adjust the preset value (Reheat). Menu structure
See also:
"4.5.3 Scheduled mode" on page 10
"4.7 Preset values and schedules" on page 15
4.5.5 Using the DHW tank temperature home
page
Typical DHW tank temperature home pages
Depending on the user profile, you can see and do more or less on
the home page. The examples in the illustrations below are in
DHW tank mode = Scheduled.
User profile = Basic User profile = Detailed
60°C
1 5 : 2 0
D e s i r e d t e m p e r a t u r e
Mon
Tank
1 5 : 2 0
0 0 : 0 0
60°C
Storage comfort
Tue
Mon
Ta n k
1 5 : 2 0
4
D e s i r e d t e m p e r a t u r e
Mon
Tank
4
1 5 : 2 0
0 0 : 0 0
Storage comfort
Tue
Mon
Ta n k
Depending on an installer setting, you have to define how much hot
water you want differently:
If you see… Then you have to define…
To which temperature the
DHW tank has to heat up.
For how many people you need
hot water. The software then
automatically calculates the
corresponding DHW tank
temperature based on installer
settings.
11


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