5 Application guidelines
Installer reference guide
20
EPGA11~ EAVH/9W
Daikin Altherma – Low temperature split
4P556070-1 – 2019.02
P
i
t
DI
a
b
P
i
Power input
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
of
all
settings,
see
):
▪ 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…).
a
b
A
B
C
1
2
3
4
5
A8P
A
Outdoor unit
B
Indoor unit
C
Energy management system
a
Power limitation activation (4 digital inputs)
b
Backup heater
P
i
t
DI4
DI3
DI1
a
b
P
i
Power input
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 are used to activate the
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
of
all
settings,
see
▪ 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 heater.
Therefore, the electrical heater is limited and turned OFF first. The
system limits power consumption in the following order:
1
Turns OFF the backup heater.
2
Limits the outdoor unit.
3
Turns OFF the outdoor unit.
Example
If the configuration is as follows: Power limitation level does NOT
allow operation of backup heater (step 1).
Then power consumption is limited as follows:
P
h
C
e
a
b
c
A
B
P
h
Produced heat
C
e
Consumed energy
A
Outdoor unit
B
Backup heater
a
Limited outdoor unit operation
b
Full outdoor unit operation
c
Backup heater step 1 turned ON
Summary of Contents for Altherma EAVX-D9WG
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