Daikin EHBX08DA9W - Power Limitation Process; Setting up an External Temperature Sensor; 6 Preparation; Overview: Preparation

6 Preparation
Installer reference guide
21
ERGA04~08DAV3(A) + EHBH/X04+08DA
Daikin Altherma – Low temperature split
4P496758-1 – 2017.12
If… has priority Then set the priority heater
via the user interface to…
Space heating Backup heater
Result: The booster heater (if
applicable) 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).
▪ Priority heater = Booster heater (if applicable).
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 used as room
thermostat (EKRUDAS) measures the indoor ambient
temperature. Therefore, the user interface used as room
thermostat 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 [9.B].
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.
▪ Configuration: Select outdoor sensor [9.B].
▪ When the power saving functionality of the outdoor unit is active
(see "8 Configuration" on page 46), the outdoor unit is turned
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:
▪ Preparing the installation site
▪ Preparing the refrigerant piping
▪ Preparing the water piping
▪ Preparing the electrical wiring
6.2 Preparing the installation site
Do NOT install the unit in places often used as work place. In case
of construction works (e.g. grinding works) where a lot of dust is
created, the unit MUST be covered.
Choose an installation location with sufficient space for carrying the
unit in and out of the site.
WARNING
The appliance shall be stored in a room without
continuously operating ignition sources (example: open
flames, an operating gas appliance or an operating electric
heater).
WARNING
DO NOT reuse refrigerant piping that has been used with
any other refrigerant. Replace the refrigerant pipes or
clean thoroughly.
6.2.1 Installation site requirements of the
outdoor unit
INFORMATION
Also read the following requirements:
▪ General installation site requirements. See the
"General safety precautions" chapter.
▪ Refrigerant piping requirements (length, height
difference). See further in this "Preparation" chapter.
Mind the following spacing guidelines:
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