Permanent Power Limitation; Power Limitation Activated By Digital Inputs; Power Limitation Process - Daikin EGSQH10S18AA9W Installer's Reference Manual

INFORMATION
▪ During emergency operation, the power consumption
control will NOT be used. This is because the backup
heater has a higher capacity then during normal
operation (9 kW instead of 6 kW) and therefore the
power calculated by the unit will be lower then the
actual power.
▪ If power limitation is enabled, water temperature set
points above 60°C in space heating are NOT
guaranteed.
5.6.1

Permanent power limitation

Permanent power limitation is useful to assure a maximum power or
current input of the system. In some countries, legislation limits the
maximum power consumption for space heating and DHW
production.
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 as described in
modify an overview setting" on page 35
the description of all settings, see
▪ Select full time 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 kW to guarantee
space heating and DHW production by allowing at least
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. 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...).
EGSQH10S18AA9W
Daikin Altherma ground source heat pump
4P351748-1D – 2016.02
"To
via the user interface (for
"8 Configuration" on page 34):
5 Application guidelines
B
a
5
4
3
A8P
2
1
b
A
A Indoor unit
B Energy management system
a Power limitation activation (4 digital inputs)
b Backup heater
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 specification and the connection of the digital inputs, see
"14.5 Wiring diagram" on page 71.
Configuration
Set the power consumption control settings as described in
modify an overview setting" on page 35
the description of all settings, see
▪ Select activation 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 compressor has better efficiency than the electrical heater.
Therefore, the electrical heater is limited and turned OFF first. The
system limits power consumption in the following order:
1 Limits electrical heater.
2 Turn OFF the electrical heater.
3 Limits the compressor.
4 Turns OFF the compressor.
are used to activate the
"To
via the user interface (for
"8 Configuration" on page 34):
Installer reference guide
17