Daikin Altherma 3 H HT F+W - Domestic Hot Water Control; About Domestic Hot Water Control

4 | Operation
User reference guide
35
ETVH/X16S18+23DA6V+9W(G) + ETBH/X16DA6V+9W
Daikin Altherma 3 H HT F+W
4P586456-1 – 2019.07
4.7 Domestic hot water control
4.7.1 About domestic hot water control
Depending on the DHW tank mode (installer setting), you use a different domestic
hot water control:
▪ Reheat only
▪ Schedule + reheat
▪ Schedule only
CAUTION
The booster heater permission schedule is used to restrict or allow booster heater
operation based on a weekly program. Advice: In order to avoid unsuccessful
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 Reheat only or Schedule + reheat mode 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 Schedule only mode is selected, it is recommended to program an
Eco action 3hours before the scheduled start-up of the disinfection function to
preheat the tank.
When weather-dependent operation is used for the tank, the tank temperature is
determined automatically by the outdoor temperature. For more information, see
"4.9Weather-dependent curve"[448].
To determine which domestic hot water mode you are using (method 1)
Check the installer settings table filled in by the installer.
To determine which domestic hot water mode you are using (method 2)
1 Go to [5]: Tank.
2 Check which items are displayed:
[5.1]
[5.2]
[5.3]
[5.4]
[5.5]
Eco setpoint
Schedule
Reheat setpoint
Comfort setpoint
Powerful operation
If… is displayed Then the DHWtank mode =…
Only [5.1] Powerful
operation
Reheat only
All items except [5.4] Reheat
setpoint are displayed
Schedule only