8 Configuration
Installer reference guide
64
EKCB
EK2CB EKMBU EKMBUHCA9W1
Daikin Altherma low temperature monobloc
4P405544-1 – 2015.03
When the outdoor temperature is between the space cooling On and
the space heating OFF temperature, the operation mode remains
unchanged unless the system is configured in room thermostat
control with one leaving water temperature zone and quick heat
emitters. In that case, the operation mode will change based on:
▪ Measured indoor temperature: besides the heating and the
cooling desired room temperature, the installer sets a hysteresis
value (e.g. when in heating, this value is related to the desired
cooling temperature) and an offset value (e.g. when in heating,
this value is related to the desired heating temperature). Example:
the desired room temperature in heating is 22°C and in cooling
24°C, with a hysteresis value of 1°C and an offset of 4°C.
Changeover from heating to cooling will occur when the room
temperature rises above the maximum of the desired cooling
temperature added by the hysteresis value (thus 25°C) and the
desired heating temperature added by the offset value (thus
26°C). Oppositely, changeover from cooling to heating will occur
when the room temperature drops below the minimum of the
desired heating temperature subtracted by the hysteresis value
(thus 21°C) and the desired cooling temperature subtracted by the
offset value (thus 20°C).
▪ Guard timer to prevent too frequent changing from heating to
cooling and vice versa.
Changeover settings related to the outdoor temperature (ONLY
when automatic is selected):
#
Code
Description
[A.3.3.1]
[4-02]
Space heating OFF temp. If the outdoor
temperature rises above this value, the
operation mode will change to cooling:
Range: 14°C~35°C (default: 25°C)
[A.3.3.2]
[F-01]
Space cooling On temp. If the outdoor
temperature drops below this value, the
operation mode will change to heating:
Range: 10°C~35°C (default: 20°C)
Changeover settings related to the indoor temperature. ONLY
applicable when Automatic is selected and the system is configured
in room thermostat control with 1 leaving water temperature zone
and quick heat emitters.
N/A
[4-0B]
Hysteresis: Ensures that changeover is
ONLY done when necessary.
Example:
the space operation mode ONLY
changes from cooling to heating when
the room temperature drops below the
desired heating temperature subtracted
by the hysteresis.
Range: 1°C~10°C, step 0.5°C (default:
1°C)
N/A
[4-0D]
Offset: Ensures that the active desired
room temperature can be reached.
Example: if heating to cooling
changeover would occur below the
desired room temperature in heating, this
desired room temperature could never
be reached.
Range: 1°C~10°C, step 0.5°C (default:
3°C)
8.3.2
Domestic hot water control: advanced
Preset tank temperatures
Only applicable when domestic hot water preparation is scheduled
or sch reheat.
You can define preset tank temperatures:
▪ storage economic
▪ storage comfort
▪ reheat
Preset values make it easy to use the same value in the schedule. If
you later want to change the value, you only have to do it in 1 place
(see also operation manual and/or user reference guide).
Storage comfort: When programming the schedule, you can make
use of the tank temperatures set as preset values. The tank will then
heat up until these setpoint temperatures have been reached.
Additionally, a storage stop can be programmed. This feature puts a
stop to tank heating even if the setpoint has NOT been reached.
Only program a storage stop when tank heating is absolutely
undesirable.
#
Code
Description
[7.4.3.1]
[6-0A]
30°C~[6‑0E]°C (default: 55°C)
Storage eco: The storage economic temperature denotes the lower
desired tank temperature. It is the desired temperature when a
storage economic action is scheduled (preferably during day).
#
Code
Description
[7.4.3.2]
[6-0B]
30°C~min(50, [6‑0E])°C (default: 45°C)
Reheat: The desired reheat tank temperature is used:
▪ in reheat mode or scheduled + reheat mode: The guaranteed
minimum tank temperature is set by T
HP OFF
–[6‑08], which is either
[6‑0C] or the weather dependent setpoint, minus the reheat
hysteresis. If the tank temperature drops below this value, the tank
is heated up.
#
Code
Description
[7.4.3.3]
[6-0C]
30°C~min(50, [6‑0E])°C (default: 45°C)
Weather dependent
The weather dependent installer settings define the parameters for
the weather dependent operation of the unit. When weather
dependent operation is active the desired tank temperature is
determined automatically depending on the averaged outdoor
temperature: low outdoor temperatures will result in higher desired
tank temperatures as the cold water tap is colder and vice versa. In
case of scheduled or screheat domestic hot water
preparation, the storage comfort temperature is weather dependent
(according to the weather dependent curve), the storage economic
and reheat temperature are NOT weather dependent. In case of
reheat only domestic hot water preparation, the desired tank
temperature is weather dependent (according to the weather
dependent curve). During weather dependent operation, the end-
user cannot adjust the desired tank temperature on the user
interface.
#
Code
Description
[A.4.6]
N/A
Weather dependent desired tank
temperature is:
▪ Fixed (default): disabled. All desired
tank temperature are NOT weather
dependent.
▪ Weather dep.: enabled. In scheduled
or
screheat
mode,
the
storage
comfort
temperature
is
weather dependent. Storage economic
and reheat temperatures are NOT
weather dependent. In reheat mode,
the desired tank temperature is
weather dependent.
Note:
When the displayed tank
temperature is weather dependent, it
cannot be adjusted on the user
interface.
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