Power Limitation Process; Setting Up An External Temperature Sensor - Daikin Altherma ERLQ011-014-016CA Installer's Reference Manual

5 Application guidelines
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
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
"14.6 Wiring diagram – components: Indoor unit" on
Configuration
Set the power consumption control settings in [A.6.3.1] via the user
interface (for the description of all settings, see
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.
Installer reference guide
22
are used to activate the
page 97.
"8 Configuration" on
If... has priority
Domestic hot water production Booster heater.
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).
▪ Heater priority = Booster heater.
Then power consumption is limited as follows:
P
h
e
d
c
b
a
C
e
A B C
P Produced heat
h
C Consumed energy
e
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).
▪ Setup: For installation instructions, see the installation manual of
the remote indoor sensor.
▪ Configuration: Select room sensor [A.2.2.B].
ERHQ+ERLQ011~016 + EHBH/X11+16CB
Then set the heater priority
via the user interface to...
Result: The backup heater will
be turned OFF first.
Backup heater.
Result: The booster heater will
be turned OFF first.
Daikin Altherma – Low temperature split
4P384974-1 – 2015.01