Power Limitation Activated By Digital Inputs; Power Limitation Process - Daikin Altherma EPGA011-016DV Installer's Reference Manual

5 Application guidelines
P
i
a
DI
b
t
P Power input
i
t Time
DI Digital input (power limitation level)
a Power limitation active
b Actual power input
Setup and configuration
▪ No additional equipment needed.
▪ Set the power consumption control settings in [9.9] via the user
interface (for the description
"8 Configuration" on page 40):
▪ Select continuous limitation mode
▪ Select the type of limitation (power in kW or current in A)
▪ Set the desired power limitation level
NOTICE
Set a minimum power consumption of ±3.6 kW to
guarantee:
▪ Defrost operation. Otherwise, if defrosting is interrupted
several times, the heat exchanger will freeze up.
▪ Space heating and DHW production by allowing the
backup heater step 1.
5.6.2 Power limitation activated by digital
inputs
Power limitation is also useful in combination with an energy
management system.
The power or current of the entire Daikin system is limited
dynamically by digital inputs (maximum four steps). Each power
limitation level is set via the user interface by limiting one of the
following:
▪ Current (in A)
▪ Power input (in kW)
The energy management system (field supply) decides the activation
of a certain power limitation level. Example: To limit the maximum
power of the entire house (lighting, domestic appliances, space
heating...).
D
a
5
4
3
A8P
2
1
b c
A B C
A Outdoor unit
B Indoor unit
C DHW tank
D Energy management system
a Power limitation activation (4 digital inputs)
b Backup heater
c Booster heater
Installer reference guide
20
of all settings, see
P
i
a
DI1
DI3
b
DI4
t
P Power input
i
t Time
DI Digital inputs (power limitation levels)
a Power limitation active
b Actual power input
Setup
▪ Demand PCB (option EKRP1AHTA) needed.
▪ Maximum four digital inputs
corresponding power limitation level:
▪ DI1 = weakest limitation (highest energy consumption)
▪ DI4 = strongest limitation (lowest energy consumption)
▪ For the specifications of the digital inputs, and for where to
connect them, refer to the wiring diagram.
Configuration
▪ Set the power consumption control settings in [9.9] via the user
interface (for the description
"8 Configuration" on page 40):
▪ Select limitation by digital inputs.
▪ Select the type of limitation (power in kW or current in A).
▪ Set the desired power limitation level corresponding to each
digital input.
INFORMATION
In case more than 1 digital input is closed (at the same
time), the digital input priority is fixed: DI4 priority>...>DI1.
5.6.3

Power limitation process

The outdoor unit has better efficiency than the electrical heaters.
Therefore, the electrical heaters are limited and turned OFF first.
The system limits power consumption in the following order:
1 Limits certain electrical heaters.
If... has priority
Domestic hot water production Booster heater (if applicable)
Space heating
2 Turns OFF all electrical heaters.
3 Limits the outdoor unit.
4 Turns OFF the outdoor unit.
Example
If the configuration is as follows:
▪ Power limitation level does NOT allow operation of both booster
heater and backup heater (step 1 and step 2).
▪ Priority heater = Booster heater (if applicable).
Then power consumption is limited as follows:
EPGA11~16DAV3 + EABH/X16DA6V+9W
are used to activate
of all settings,
Then set the priority heater
via the user interface to...
Result: The backup heater will
be turned OFF first.
Backup heater
Result: The booster heater (if
applicable) will be turned OFF
first.
Daikin Altherma – Low temperature split
4P556069-1 – 2018.10
the
see