Installer reference guide
55
08 + ERLQ004~008
Daikin Altherma - Low Temperature Split
4P313774-1 – 2012.05
8 Configuration
Operation range
Depending on the average outdoor temperature, the operation of the
unit in space heating or space cooling is prohibited.
Space heating OFF temp: When the averaged outdoor temperature
raises above this value, space heating is turned OFF to avoid
overheating.
Space cooling On temp: Only applicable for EHBX and EHVX. When
the averaged outdoor temperature drops below this value, space
ooling is turned OFF.
Automatic heating/cooling changeover
Only applicable for EHBX and EHVX. The end-user sets the
desired operation mode on the user interface: Heating, Cooling or
Automatic (see also operation manual/user reference guide). When
Automatic is selected, the changing of the operation mode is based
on:
Q
Monthly allowance for heating and/or cooling: the end-user
indicates on a monthly base which operation is allowed (# [7
:
5]):
both heating/cooling or heating only or cooling only. If the
allowed operation mode changes to cooling only, the operation
mode changes to cooling. If the allowed operation mode
changes to heating only, the operation mode changes to
heating.
Q
Averaged outdoor temperature: the operation mode will be
changed in order to always be within range determined by the
space heating OFF temperature for heating and the space
cooling On temperature for cooling. If the outdoor temperature
drops, the operation mode switches to heating and vice versa.
Note that the outdoor temperature will be time-averaged (see
"8 Configuration" on page 41).
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:
Q
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 raises 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).
Q
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):
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:
Q
storage economic
Q
storage comfort
Q
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: Only applicable if the desired tank temperature is
NOT weather dependent. The storage comfort temperature denotes
the higher desired tank temperature, where the tank heat up cycle is
prioritized till the reheat set point. It is the desired temperature when
a storage comfort action is scheduled (preferably during night).
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
[A.3.3.1]
[4-02]
Q
EHBH/X04+08 and EHVH/X04+08:
14~25°C (default: 25°C)
Q
EHBH/X16 and EHVH/X16:
14~35°C (default: 35°C)
The same setting is also used in
automatic heating/cooling changeover.
#
Code
Description
[A.3.3.2]
[F-012]
10~35°C (default: 20°C)
The same setting is also used in
automatic heating/cooling changeover.
#
Code
Description
[A.3.3.1]
[4-02]
Space heating OFF temp. If the outdoor
temperature raises above this value, the
operation mode will change to cooling:
Q
EHBH/X04+08 and EHVH/X04+08:
14~25°C (default: 25°C)
Q
EHBH/X16 and EHVH/X16:
14~35°C (default: 35°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:
10~35°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.
1~10°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.
1~10°C, step 0.5°C (default: 1°C)
N/A
[4-0E]
Guard timer: Minimum time that the
system runs in a certain space operation
mode. This prevents too frequent
changeover between heating and cooling
mode.
0~120 minutes, step 15 minutes (default:
30 minutes)
#
Code
Description
[7.4.3.1]
[6-0A]
30~80°C (default: 60°C)
#
Code
Description
[7.4.3.2]
[6-0B]
30~80°C (default: 45°C)
