Reheat Mode; Scheduled Mode - Daikin EHVH08SU26CB6W User Reference Manual

▪ Reheat mode

▪ Scheduled mode

▪ Scheduled + reheat mode
CAUTION
The booster heater permission schedule is used to restrict
or allow booster heater operation based on a weekly
program. Advice: In
disinfection function, at least allow the booster heater (by
the weekly program) for minimum 4 hours starting from the
scheduled start-up of disinfection. If the booster heater is
restricted during disinfection, this function will NOT be
successful and the applicable warning AH will be
generated.
INFORMATION
In case of error code AH and no interruption of the
disinfection function occurred due to domestic hot water
tapping, following actions are recommended:
▪ When the Domestic hot water > Type > Reheat or
Reheat + sched. is selected, it is recommended to
program the start-up of the disinfection function at least
4 hours later than the last expected large hot water
tapping. This start-up can be set by installer settings
(disinfection function).
▪ When the Domestic hot water > Type > Scheduled only
is selected, it is recommended to program a Storage
eco 3 hours before the scheduled start-up of the
disinfection function to preheat the tank.
To determine which DHW tank mode you are using (method 1)
Check the installer settings table filled in by the installer.
To determine which DHW tank mode you are using (method 2)
Prerequisite: User profile = Detailed.
1 Go to the DHW tank temperature home page (Tank).
2 Check which icons are displayed:
If... is displayed
Reheat mode
Scheduled mode
Scheduled + reheat mode
4.5.2 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 t
1
60°C
50°C
40°C
15°C
00:00 07:00
T DHW tank temperature
t
t Time
EHVH04~16SU18+26CB6W
Daikin Altherma – Low temperature split
4P449981-1 – 2016.06
order to avoid unsuccessful
Then the DHW tank mode =...
3
2 4
t
14:00 21:00
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.
In reheat mode, you can do the following:
You can...
Read out the desired reheat temperature.
Adjust the reheat temperature.
Condition: is displayed on the DHW tank
temperature home page.
Activate the DHW tank booster mode.
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 12
▪ "4.5.6 Using the DHW tank booster mode" on page 13
▪ "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 t
1
2
60°C
50°C
40°C
15°C
00:00 07:00
T DHW tank temperature
t
t Time
▪ Initially, the DHW tank temperature is the same as the
temperature of the domestic water entering the DHW tank
(example: 15°C).
4 Operation
Location
DHW tank
temperature
home page
Menu structure
4
3
5
t
14:00 21:00
User reference guide
11