Installer reference guide
53
08 + ERLQ004~008
Daikin Altherma - Low Temperature Split
4P313774-1 – 2012.05
8 Configuration
Example: Set the minimum leaving water temperature to 28°C to
avoid NOT to be able to heat up the room: leaving water
temperatures must be sufficient higher than the room temperatures
(in heating).
Leaving water temperature overshoot temperature
This function defines how much the water temperature may rise
above the desired leaving water temperature before the compressor
stops. The compressor will startup again when the leaving water
temperature drops below the desired leaving water temperature. This
function is only applicable in heating mode.
Leaving water temperature compensation around 0°C
In heating operation, the desired leaving water temperature is locally
increased around an outdoor temperature of 0°C. This compensation
can be selected when using an absolute or a weather dependent
desired temperature, this compensation can be selected (see
illustration below). Use this setting to compensate for possible heat
losses of the building when the outdoor temperature is around 0°C
(e.g. in cold region countries).
Leaving water temperature maximum modulation
Only applicable in room thermostat control and when modulation is
enabled. The maximum modulation (=variance) on the desired
leaving water temperature decided on the difference between the
actual and desired room temperature, e.g. 3°C modulation means the
desired leaving water temperature can be increased or lowered by
3°C. Increasing the modulation results in better performance (less
On/OFF, faster heat up), but note that depending on the heat emitter,
there must always be a balance (refer to the design and selection of
the heat emitters) between the desired leaving water temperature
and the desired room temperature.
Weather dependent cooling allowance
Only applicable for EHBX and EHVX. It is possible to disable weather
dependent cooling, meaning the desired leaving water temperature in
cooling operation doesn’t depend on the outdoor ambient
temperature and this regardless whether weather dependent is
selected or NOT. Both for the main leaving water temperature zone
as for the additional leaving water temperature zone, this can be set
separately.
NOTICE
Q
When adjusting the leaving water temperature ranges,
all desired leaving water temperatures are also
adjusted to guarantee they are between the limits.
Q
Always balance between the desired leaving water
temperature with the desired room temperature and/or
the capacity (according to the design and selection of
the heat emitters). The desired leaving water
temperature is the result of several settings (preset
values, shift values, weather dependent curves,
modulation). As a result, too high or too low leaving
water temperatures could occur which lead to
overtemperatures or capacity shortage. By limiting the
leaving water temperature range to adequate values
(depending on the heat emitter), such situations can
be avoided.
#
Code
Description
Leaving water temperature range for the main leaving water
temperature zone (= the leaving water temperature zone with the
lowest leaving water temperature in heating operation and the
highest leaving water temperature in cooling operation)
[A.3.1.1.2.2] [9-00]
Maximum temp (heating)
37~depending on outdoor unit (default:
55°C)
[A.3.1.1.2.1] [9-01]
Minimum temp (heating)
15~37°C (default: 25°C)
[A.3.1.1.2.4] [9-02]
Maximum temp (cooling)
18~22°C (default: 22°C)
[A.3.1.1.2.3] [9-03]
Minimum temp (cooling)
5~18°C (default: 5°C)
Leaving water temperature range for the additional leaving water
temperature zone (= the leaving water temperature zone with the
highest leaving water temperature in heating operation and the
lowest leaving water temperature in cooling operation)
[A.3.1.2.2.2] [9-06]
Maximum temp (heating)
37~depending on outdoor unit (default:
55°C)
[A.3.1.2.2.1] [9-05]
Minimum temp (heating)
15~37°C (default: 25°C)
[A.3.1.2.2.4] [9-08]
Maximum temp (cooling)
18~22°C (default: 22°C)
[A.3.1.2.2.3] [9-07]
Minimum temp (cooling)
5~18°C (default: 5°C)
#
Code
Description
N/A
[9-04]
1~4°C (default: 1°C)
#
Code
Description
N/A
[D-03]
0 (disabled) (default)
1 (enabled) L=2°C, R=4°C (–2°C<T
A
<2°C)
2 (enabled) L=4°C, R=4°C (–2°C<T
A
<2°C)
3 (enabled) L=2°C, R=8°C (–4°C<T
A
<4°C)
4 (enabled) L=4°C, R=8°C (–4°C<T
A
<4°C)
#
Code
Description
N/A
[8-06]
1~5°C (default: 3°C)
#
Code
Description
N/A
[1-04]
Weather dependent cooling of the main
leaving water temperature zone is…
0 (disabled) (default)
1 (enabled)
N/A
[1-05]
Weather dependent cooling of the
additional leaving water temperature
zone is…
0 (disabled) (default)
1 (enabled)
