Domestic Hot Water Control - Daikin ERLQ004CA Installer's Reference Manual

8 Configuration
Leaving water temperature: Modulation
Only applicable in case of room thermostat control. When using the
room thermostat functionality, the customer needs to set the desired
room temperature. The unit will supply hot water to the heat emitters
and the room will be heated. Additionally, also the desired leaving
water temperature must be configured: when turning on the
modulation, the desired leaving water temperature will be calculated
automatically by the unit (based on the preset temperatures, if
weather-dependent is selected, modulation will be done based on the
desired weather-dependent temperatures); when turning off the
modulation, you can set the desired leaving water temperature on the
user interface. Moreover, with the modulation turned on, the desired
leaving water temperature is lowered or raised in function of the
desired room temperature and the difference between the actual and
the desired room temperature. This results in:
stable room temperatures exactly matching the desired
temperature (higher comfort level)
less On/OFF cycles (lower noise level, higher comfort and
higher efficiency)
water temperatures as low as possible to match the desired
temperature (higher efficiency)
# Code
[A.3.1.1.5] [8-05] Modulated LWT:
Leaving water temperature: Emitter type
Only applicable in case of room thermostat control. Depending on the
system water volume and the heat emitters type, the heat up or cool
down of a space can take longer. This setting can compensate for a
slow or a quick heating/cooling system during the heat up/cool down
cycle.
Note: The setting of the emitter type will influence the maximum
modulation of the desired leaving water temperature and the
possibility for usage of the automatic cooling/heating changeover
based on the indoor ambient temperature.
Therefore it is important to set this correctly.
# Code
[A.3.1.1.7] [9-0B] Emitter type:
Reaction time of the system:
Installer reference guide
51
Description
No (default): disabled.
Note: The desired leaving water
temperature needs to be set on the
user interface.
Yes: enabled
Note: The desired leaving water
temperature can only be read out
on the user interface
Description
Quick Example: Small water
volume and fan coils.
Slow Example: Large water
volume, floor heating loops.

8.2.6 Domestic hot water control

Only applicable in case an optional domestic hot water tank is
installed.
Configuring the desired tank temperature
The domestic hot water can be prepared in 3 different ways. They
differ from each other by the way the desired tank temperature is set
and how the unit acts upon it.
# Code
[A.4.1] [6-0D] To configure the desired tank temper-
ature.
Setpoint mode:
See "8.3.2 Domestic hot water control: advanced" on page 55 for
more details
Readout the desired tank temperature
The desired tank temperature is displayed on the user interface. By
the following settings, you can configure the way the tank
temperature is displayed:
by its numerical value
by an equivalent.
Use the numerical value in case the understanding of tank
temperature is clear for the customer. On the user interface the
customer can set the desired tank temperature by 1°C. For
customers with less feeling about tank temperatures, choose display
by equivalent number of people. They will set the desired tank
temperature by indicating their domestic hot water consumption as a
number of people.
As installer, you configure the conversion between the real desired
tank temperature and the number of people taking into account the
installed tank size and the daily domestic hot water consumption of
the customer. Additionally, using the graphical display, the customer
is made aware about the amount of consumed domestic hot water.
# Code
[A.4.3.1] N/A How has the tank temperature to be
displayed on the user interface?
[A.4.3.2.1] N/A 1 person
The increment of the desired tank
temperature for 2 persons compared to 1
person. 0~20°C (default: 4°C)
Description
Reheat only: Only reheat operation
is allowed.
Note: Avoid using this setting in
case of a domestic hot water tank
without internal booster heater (risk
of capacity shortage between space
heating and domestic hot water).
Reheat + sched.: The domestic hot
water cylinder is reheated and also
heated up through the schedule
timer.
Scheduled only: The domestic hot
water tank can be heated via a
schedule.
Description
As temperature.
As graphic: The temperature has to
displayed as available hot water for
x persons. If you choose this, you
also have to configure
number equals which temperature
under [A.4.4.2]: Operation day.
EHBH04+08 + ERLQ004~008
Daikin Altherma - Low Temperature Split
4P313774-1 – 2012.05
which