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6 Preparation
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
▪ Install control box EKCB07CAV3 and option box EK2CB07CAV3.
▪ 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 [A.6.3.1] via the user
interface (for the description of all settings, see
page 46):
▪ 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.
5.5.3
Power limitation process
The outdoor unit has better efficiency than the backup heater.
Therefore, the backup heater is limited and turned OFF first. The
system limits power consumption in the following order:
1
Limits the backup heater.
2
Turns OFF the backup heater.
3
Limits the outdoor unit.
4
Turns OFF the outdoor unit.
Example
If the configuration is as follows: Power limitation level does NOT
allow for backup heater operation (step 1 and step 2).
Then power consumption is limited as follows:
P
h
d
c
b
a
C
e
A
B
P
Produced heat
h
C
Consumed energy
e
A
Outdoor unit
B
Backup heater
a
Limited outdoor unit operation
b
Full outdoor unit operation
c
Backup heater step 1 turned ON
d
Backup heater step 2 turned ON
Installer reference guide
20
are
used
to
activate
the
"8 Configuration" on
5.6
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:
▪ Requires
control
box
EK2CB07CAV3.
▪ For installation instructions, see the installation manual of the
remote indoor sensor and the addendum book for optional
equipment.
Configuration: Select room sensor [A.2.2.F.5].
Outdoor ambient temperature
▪ In the outdoor unit, the outdoor ambient temperature is measured.
Therefore, the outdoor unit must be installed on a location:
▪ At the north side of the house or at the side of the house where
the most heat emitters are located
▪ That is NOT exposed to direct sunlight
▪ If this is NOT possible, Daikin recommends to connect a remote
outdoor sensor (option EKRSCA1).
▪ Setup: For installation instructions, see the installation manual of
the remote outdoor sensor and the addendum book for optional
equipment.
▪ Configuration: Select outdoor sensor [A.2.2.B].
▪ When the power saving functionality of the outdoor unit is active
(see
"8 Configuration" on page
down to reduce standby energy losses. As a result, the outdoor
ambient temperature is NOT read out.
▪ If the desired leaving water temperature is weather dependent, the
full time outdoor temperature measurement is important. This is
another reason to install the optional outdoor ambient temperature
sensor.
INFORMATION
The external outdoor ambient sensor data (either averaged
or instantaneous) is used in the weather-dependent control
curves and in the automatic heating/cooling changeover
logic. To protect the outdoor unit, the internal sensor of the
outdoor unit is always used.
6
Preparation
6.1
Overview: Preparation
This chapter describes what you have to do and know before going
on-site.
It contains information about:
Packaged air-cooled water chillers and packaged air to water heat
EKCB07CAV3
and
option
46), the outdoor unit is turned
EWAQ+EWYQ004+005BAVP
pumps
4P492900-1 – 2017.06
box
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