Setting Up An External Temperature Sensor; Preparation; Preparing Installation Site; Installation Site Requirements Of The Outdoor Unit - Daikin ERLQ004CA Installer's Reference Manual

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 outdoor sensor.
Configuration: Select room sensor [A.2.2.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 [A.2.2.B].
During suspend (see configuration), the outdoor unit is turned
down to reduce the 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.
EHBH04+08 + ERLQ004~008
Daikin Altherma - Low Temperature Split
4P313774-1 – 2012.05
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

Preparing 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 the installation location with sufficient place for carrying the
unit in and out of the site.
6.1.1 Installation site requirements of the outdoor
unit
Mind the following spacing guidelines:
>250 >350
b
a
(mm)
a Air outlet
b Air inlet
See "15.1 Dimensions and service space" on page 72 for more
detailed information about spacing guidelines.
NOTICE
Do NOT stack the units on each other.
Do NOT hang the unit on a ceiling.
When the outdoor unit is subject to windy and/or low ambient
temperatures, mind the following guidelines:
Strong winds (≥18 km/h) blowing against the outdoor unit's air outlet
causes short circuit (suction of discharge air). This may result in:
deterioration of the operational capacity;
frequent frost acceleration in heating operation;
disruption of operation due to decrease of low pressure;
a broken fan (if a strong wind blows continuously on the fan, it
may start rotating very fast, until it breaks).
It is recommended to install a baffle plate when the air outlet is
exposed to wind.
It is recommended to install the outdoor unit with the air inlet facing
the wall and NOT directly exposed to the wind.
6 Preparation
b >250
a
>250
(mm)
Installer reference guide
20