4 Operation
User reference guide
11
EGSQH10S18AA9W
Daikin Altherma ground source heat pump
4P351749-1D – 2016.09
CAUTION
The backup heater permission schedule is used to restrict
or allow backup heater operation based on a weekly
program. Advice: In order to avoid unsuccessful
disinfection function, at least allow the backup heater (by
the weekly program) for minimum 4 hours starting from the
scheduled start-up of disinfection. If the backup 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
Then the DHW tank mode =…
Reheat mode
Scheduled mode
Sch 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
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
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…
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 13
▪
"4.7 Preset values and schedules" on page 15
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:
Summary of Contents for ALTHERMA
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