Daikin ERHQ011BA Installer's Reference Manual page 40

8 Configuration
# Code
[A.3.1.2.4] [1-06] Set weather-dependent cooling:
[1-07]
[1-08]
[1-09]
[1-08]
[1-09]
Leaving water temperature: Delta T emitter
Temperature difference for entering and leaving water. The unit is
designed to support under floor loops operation. The recommended
leaving water temperature (set by the user interface) for under floor
loops is 35°C. In such case, the unit will be controlled to realize a
temperature difference of 5°C which means that the entering water to
the unit is around 30°C. Depending on the installed application
(radiators, heat pump convector, under floor loops) or situation, it can
be possible to change the difference between entering and leaving
water temperature. Note that the pump will regulate its flow to keep
the ∆t.
# Code
[A.3.1.3.1] [9-09] Heating: required temperature
difference between entering and
leaving water. Range: 3~10°C (in steps
of 1°C; default value: 5°C).
[A.3.1.3.2] [9-0A] Cooling: required temperature
difference between entering and
leaving water. Range: 3~10°C (in steps
of 1°C; default value: 5°C).
Installer reference guide
39
Description
T t
[1-06] [1-07]
T : Target leaving
t
temperature (main)
T : Outdoor temperature
a
[1-06]: Low outdoor ambient
temperature. 10°C~25°C (default:
20°C)
[1-07]: High outdoor ambient
temperature. 25°C~43°C (default:
35°C)
[1-08]: Desired leaving
temperature when the outdoor
temperature equals or drops below
the low ambient temperature.
Between minimum and maximum
leaving water temperature (default:
22°C).
Note: This value should be higher
than [1-09] as for low outdoor
temperatures less cold
suffices.
[1-09]: Desired leaving
temperature when the outdoor
temperature equals or rises above
the high ambient temperature.
Between minimum and maximum
leaving water temperature (default:
18°C).
Note: This value should be lower
than [1-08] as for high outdoor
temperatures colder water
required.
Description
Leaving water temperature: Modulation
Only applicable in case of room thermostat control. 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: when turning on the
modulation, the desired leaving water temperature will be calculated
automatically by the unit (based on the preset temperatures, if
weather-dependent is selected, modulation will be done based on the
desired weather-dependent temperatures); when turning off the
modulation, you can set the desired leaving water temperature on the
T a
user interface. Moreover, with the modulation turned on, the desired
water
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)
#
water
[A.3.1.1.5] [8-05]
water
water
Leaving water temperature: Emitter type
Only applicable in case of room thermostat control. Depending on the
system water volume and the heat emitters type, the heat up or cool
down of a space can take longer. This setting can compensate for a
slow or a quick heating/cooling system during the heat up/cool down
cycle.
Note: The setting of the emitter type will influence the maximum
modulation of the desired leaving water temperature and the
possibility for usage of the automatic cooling/heating changeover
is
based on the indoor ambient temperature.
Therefore it is important to set this correctly.
#
[A.3.1.1.7] [9-0B]
Code Description
Modulated LWT:
No (default): disabled.
Note: The desired leaving water
temperature needs to be set on the
user interface.
Yes: enabled
Note: The desired leaving water
temperature can only be read out
on the user interface
Code Description
Emitter type:
Reaction time of the system:
Quick Example:
volume and fan coils.
Slow Example:
volume, floor heating loops.
Daikin Altherma - Low Temperature Split
Small water
Large water
EHBH/X16
4P313776-1 – 2012.05