Daikin R32 Split Series - Operation; User Interface and Navigation

6 Energy saving tips
Operation manual
13
EKHWET90~120BAV3
R32 Split series – Domestic hot water tank
4P680075-1C – 2022.03
You feel … Fine-tune with
setpoints:
At regular outdoor
temperatures …
At cold outdoor
temperatures …
Y2
(a)
Y1
(a)
X1
(a)
X2
(a)
OK Cold ↑ — ↑ —
OK Hot ↓ — ↓ —
Cold OK — ↑ — ↑
Cold Cold ↑ ↑ ↑ ↑
Cold Hot ↓ ↑ ↓ ↑
Hot OK — ↓ — ↓
Hot Cold ↑ ↓ ↑ ↓
Hot Hot ↓ ↓ ↓ ↓
(a)
See "5.8.22-points curve"[411].
5.9 Priority schedule
Air Conditioning or domestic hot water priority
When multiple indoor units are connected to the outdoor unit, the
user can set on the user interface for each month whether to put DHW
or Air Conditioning (A/C) as priority. This will determine how the
outdoor unit will react in case multiple indoor units requested
operation at the same time:
▪ If DHW is set as priority, outdoor unit can decide to operate for DHW
primarily, while in cooling season A/C operation is stopped or in
heating season according to the heating load of the system, A/C
operation is on hold or balanced. In this case, once DHW operation
is finished or is no longer within operation range of heat pump,
outdoor unit can switch to A/C (cooling or heating).
▪ If A/C is set as priority, outdoor unit can decide to operate only A/
C, in which case the booster heater can start for DHW production.
Once A/C (cooling) operation is turned off or A/C (heating)
operation is finished, heat pump outdoor unit can switch to DHW.
To select the Priority schedule
1 Go to [5.F]: Tank > Priority schedule.
2 Select which month to set.
Priority schedule
February
March
January
DHW
DHW
DHW
3 Select the priority schedule of that month.
Priority schedule
February
March
January
DHW
DHW
A/C
Example of possible outcomes based on scheduled Priority
schedule are as follow:
If … Then heat pump operation =
…
(a)
Which is
priority?
A/C
request is
…
Can
outdoor
unit do
both?
(b)
DHW Cooling - DHW, while A/C is put on hold
Heating Yes DHW and A/C together
No DHW, while A/C is put on hold
If … Then heat pump operation =
…
(a)
Which is
priority?
A/C
request is
…
Can
outdoor
unit do
both?
(b)
A/C Cooling - A/C, while DHW is by booster
heater
Heating Yes DHW and A/C together
No A/C, while DHW is by booster
heater
(a)
Applicable if DHW and A/C requests happen at the same time,
when outdoor ambient temperature and tank target temperature
are within operation range of outdoor unit.
(b)
Decided by outdoor unit.
INFORMATION
If the booster heater always takes over the DHW heat load
due to setting Priority schedule to A/C, electricity
consumption will be considerably higher. For the months
where A/C heating/cooling is less important, it is
recommended to set the Priority schedule to DHW.
INFORMATION
If DHW is set as priority and frequent DHW operation is
expected, there is risk for comfort problem due to
interruption of A/C operation. For the months where A/C
heating/cooling is more important, it is recommended to set
the Priority schedule to A/C.
5.10 Operation mode
Choosing Operation mode for DHW
Depending on whether early booster heater operation is desired, two
DHW operation modes can be chosen as follows:
▪ Efficient: Booster heater only allowed when outdoor unit is
unable to perform DHW (e.g. water temperature is outside operation
range of outdoor unit, or outdoor unit decides to only perform A/C
operation – refer to "5.9Priority schedule"[413])
▪ Quick: Booster heater is allowed either after a certain amount of
time has passed since start of DHW operation (refer below) or when
outdoor unit is unable to perform DHW.
Quick mode timer
When Quick mode is chosen, user can choose between 3 preset
timers after which Booster heater can activate since the start of DHW
operation:
▪ Turbo: 10 minutes
▪ Normal: 20 minutes
▪ Economic: 30 minutes
When Efficient mode is chosen, the Quick mode timer is not
used.
INFORMATION
When tank disinfection is performed with Efficient
mode, the booster heater can still start after 20 minutes to
assist the heat pump.
6 Energy saving tips
Tips about DHWtank temperature
▪ Set the Priority schedule to DHW to minimize the usage of the
electric booster heater.
▪ Use a weekly schedule for your normal domestic hot water needs
(ONLY in scheduled mode).