4 Operation
User reference guide
11
EGSQH10S18AA9W
Daikin Altherma ground source heat pump
4P3517491 – 2013.06
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
▪ Electricity tariffs are lower
Example:
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 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
Sch reheat mode
In sch 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 this 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
4
3
In sch 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 11
▪
"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, the user interface gives you either a
basic or a detailed home page. Depending on an installer setting,
either an actual temperature or a number of people is displayed to
indicate the domestic hot water tank temperature. The examples in
the illustrations below are in DHW tank mode = Scheduled.
User profile = Basic
User profile = Detailed
15:20
Mon
Tank
Desired temperature
60°C
15:20
Mon
Tank
Storage comfort
60°C
Tue
00:00
15:20
Mon
Tank
Desired temperature
4
15:20
Mon
Tank
Storage comfort
4
Tue
00:00
