Daikin Altherma EHVZ08S18CB, User Reference Manual

Page: 11 / 24

4 Operation
User reference guide
11
EHVZ04~16S18CB
Daikin Altherma – Low temperature split
4P401674-1 – 2015.02
In reheat mode, you can do the following:
You can… Location
Read out the desired reheat temperature. DHW tank
temperature
home page
Adjust the reheat temperature.
Condition: is displayed on the DHW tank
temperature home page.
Activate the DHW tank booster mode.
(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.
Menu structure
See also:
▪ "4.5.5 Using the DHW tank temperature home page" on page 12
▪ "4.5.6 Using the DHW tank booster mode" on page 12
▪ "4.7 Preset values and schedules" on page 16
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: Storage 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: 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 12
▪ "4.5.6 Using the DHW tank booster mode" on page 12
▪ "4.7 Preset values and schedules" on page 16
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 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
60°C Storage comfort
50°C Storage eco
45°C Reheat
35°C Reheat tank temperature – hysteresis value
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 16