Daikin Altherma 3 H HT F Installer's Reference Manual page 171

EPRA14~18D + ETVH16SU18+23E
Daikin Altherma 3 H HT F
4P644738-1A – 2022.03
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: if
Modulation is enabled, the unit automatically calculates the desired leaving
water temperature. These calculations are based on:
▪ the preset temperatures, or
▪ the desired weather-dependent temperatures (if weather-dependent is enabled)
Moreover, with Modulation enabled, 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)
If Modulation is disabled, set the desired leaving water temperature via [2] Main
zone.
# Code
[2.C.1] [8‑05]
[2.C.2] [8‑06]
INFORMATION
When leaving water temperature modulation is enabled, the weather‑dependent
curve needs to be set to a higher position than [8-06] plus the minimum leaving
water temperature setpoint required to reach a stable condition on the comfort
setpoint for the room. To increase efficiency, modulation can lower the leaving water
setpoint. By setting the weather‑dependent curve to a higher position, it cannot drop
below the minimum setpoint. See the illustration below.
T t
+[8-06]
−[8-06]
a Weather-dependent curve
b Minimum leaving water temperature setpoint required to reach a stable condition
on the comfort setpoint for the room.
Description
Modulation:
▪ 0 No (disabled)
▪ 1 Yes (enabled)
Note: The desired leaving water temperature
can only be read out on the user interface.
Max modulation:
▪ 0°C~10°C
This is the temperature value by which the
desired leaving water temperature is increased or
decreased.
a
b
T a
10 Configuration
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Installer reference guide
171