5 Application guidelines
Installer reference guide
23
EKCB
EK2CB EKMBU EKMBUHCA9W1
Daikin Altherma low temperature monobloc
4P405544-1 – 2015.03
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…).
X2M
A
B
C
D
E
F
a
b
c
A
Outdoor unit
B
Control box
C
Option box
D
Backup heater kit
E
Domestic hot water tank
F
Energy management system
a
Power limitation activation (4 digital inputs)
b
Backup heater
c
Booster 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
▪ Install control box EKCB07CAV3 and option box EK2CB07CAV3.
▪ 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 [A.6.3.1] via the user
interface (for the description of all settings, see
"8 Configuration" on
page 48
):
▪ 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 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
Then set the heater priority
via the user interface to…
Domestic hot water production Booster heater.
Result:
The backup heater will
be turned OFF first.
Space heating
Backup heater.
Result:
The booster heater will
be turned OFF first.
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).
▪ Heater priority = Booster heater.
Then power consumption is limited as follows:
P
h
C
e
a
b
c
d
e
A
B
C
P
h
Produced heat
C
e
Consumed energy
A
Outdoor unit
B
Booster heater
C
Backup heater
a
Limited outdoor unit operation
b
Full outdoor unit operation
c
Booster heater turned ON
d
Backup heater step 1 turned ON
e
Backup heater step 2 turned ON
5.7
Setting up an external temperature
sensor
You can connect one external temperature sensor. It can measure
the indoor or outdoor ambient temperature. Daikin recommends to
use an external temperature sensor in the following cases:
Indoor ambient temperature
▪ In room thermostat control, the user interface is used as room
thermostat and it measures the indoor ambient temperature.
Therefore, the user interface must be installed on a location:
▪ Where the average temperature in the room can be detected
▪ That is NOT exposed to direct sunlight
▪ That is NOT near a heat source
▪ That is NOT affected by outside air or air draught because of,
for example, door opening/closing
▪ If this is NOT possible, Daikin recommends to connect a remote
indoor sensor (option KRCS01-1).
Summary of Contents for EK2CB07CAV3
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