Daikin EHVH04SU18CB6W, Operation Manuals

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3 Operation
Operation manual
5
EHVH04~26CB6W
Daikin Altherma – Low temperature split
4P449982-1 – 2016.06
3.4 Domestic hot water control
CAUTION
Only for EHVH_SU_CB6W models.
When using the domestic hot water tank to produce hot
water, do NOT turn OFF the heat pump.
Reason: the
electrical backup heater from the space heating circuit is
used during disinfection of the domestic hot water tank.
3.4.1 Reheat mode
In reheat mode ( ),the DHW tank continuously heats up to the
temperature shown on the DHW tank temperature home page
(example: 50°C).
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
INFORMATION
There is a risk of space heating capacity shortage/comfort
problem (in case of frequent domestic hot water operation,
frequent and long space heating interruption will happen)
when selecting [6‑0D]=0 ([A.4.1] Domestic hot water
Type=Reheat only).
INFORMATION
When the DHW tank mode is reheat, the risk for capacity
shortage and comfort problem is significant. In case of
frequent reheat operation, space heating function is
regularly interrupted.
3.4.2 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
3.4.3 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
3.4.4 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. The examples in the illustrations
below are in DHW tank mode = Scheduled.
User profile = Basic User profile = Detailed
15:20
60°C
Storage comfort
Tank
Mon
15:20
60°C
00:00
Mon
Tue
Tank
Storage comfort
To read out and adjust the desired reheat temperature (in
scheduled and reheat mode)
1 Go to [7.4.3.3]: > User settings > Preset values > Tank
temperature > Reheat.
Result: You can read out the desired reheat temperature.
2 Press or to adjust.
To read out and overrule the active or next scheduled desired
temperature (in scheduled mode or sch reheat mode)
1 Go to the DHW tank temperature home page (Tank).
Result:
60°C
is displayed.
2 Press or to overrule. Note: If the desired temperature is
weather dependent, you cannot change it on the home page.
3.4.5 Using the DHW tank booster mode
To activate the DHW tank booster mode (user profile = Basic)
1 Go to the DHW tank temperature home page (Tank).
2 Press for more than 5 seconds.
To activate the DHW tank booster mode (user profile = Detailed)
1 Go to the DHW tank temperature home page (Tank).
2 Press to select .