Daikin Altherma Installer's Reference Manual page 54

8 Configuration
NOTICE
In case of a floor heating application it is important to limit
the:
▪ maximum leaving water temperature at heating
operation according to the specifications of the floor
heating installation.
▪ the minimum leaving water temperature at cooling
operation to 18~20°C to prevent condensation on the
floor.
NOTICE
▪ When adjusting the leaving water temperature ranges,
all desired leaving water temperatures are also
adjusted to guarantee they are between the limits.
▪ 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).
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.
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).
# Code
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)
Installer reference guide
54
The desired leaving water
Description
# Code
[A.3.1.2.2.3] [9-07] Minimum temp (cooling)
5~18°C (default: 5°C)
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.
# Code
N/A [9-04] 1~4°C (default: 1°C)
Leaving water temperature compensation around 0°C
In heating operation, the desired leaving water temperature is locally
increased around an outdoor
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).
T T
t t
L L
R R
T
A
0°C 0°C
a b
a Absolute desired LWT
b Weather dependent desired LWT
# Code
N/A [D-03] 0 (disabled) (default)
1 (enabled) L=2°C,
R=4°C (−2°C<T
2 (enabled) L=4°C,
R=4°C (−2°C<T
3 (enabled) L=2°C,
R=8°C (−4°C<T
4 (enabled) L=4°C,
R=8°C (−4°C<T
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.
# Code
N/A [8-06] 1~5°C (default: 3°C)
Description
Description
temperature of 0°C.
T
A
Description
<2°C)
A
<2°C)
A
<4°C)
A
<4°C)
A
Description
ERLQ004~008CAV3 + EHBH/X04+08CA
Daikin Altherma - Low Temperature Split
4P313774-1C – 2012.11
This