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8 Configuration
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 user interface. Moreover, with the modulation turned on, 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
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)
#
Code
[A.3.1.1.5]
[8-05]
Modulated LWT:
▪ 0 (No): disabled.
Note: The desired leaving water
temperature needs to be set on the
user interface.
▪ 1
leaving
calculated according to the difference
between the desired and the actual
room temperature. This creates a
better match between the capacity of
the heat pump and the actual
required capacity, and results in less
start/stop
economic operation.
Note: The desired leaving water
temperature can only be read out on
the user interface
N/A
[8-06]
Leaving water temperature maximum
modulation:
0°C~10°C (default: 3°C)
Requires modulation to be enabled.
This is the value by which the desired
leaving water temperature is increased
or lowered.
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. Refer
to 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.
Installer reference guide
54
exactly
matching
the
desired
Description
(Yes)(default):
enabled.
The
water
temperature
cycles
and
a
more
a
b
T a
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
based on the indoor ambient temperature.
Therefore it is important to set this correctly.
#
Code
[A.3.1.1.7]
[9-0B]
8.2.6
Contact/helpdesk number
#
Code
is
[6.3.2]
N/A
8.3
Advanced configuration/
optimization
8.3.1
Space heating/cooling operation:
advanced
Preset leaving water temperature
You can define preset leaving water temperatures:
▪ economic (denotes the desired leaving water temperature which
results in the lowest energy consumption)
▪ comfort (denotes the desired leaving water temperature which
results in the highest energy consumption).
Preset values make it easy to use the same value in the schedule or
to adjust the desired leaving water temperature according to the
room temperature (see modulation). If you later want to change the
value, you ONLY have to do it in one place. Depending on whether
the desired leaving water temperature is weather dependent or NOT,
the desired shift values or the absolute desired leaving water
temperature should be specified.
NOTICE
Select preset leaving water temperatures in accordance
with the design and selected heat emitters to ensure the
balance between desired room and leaving water
temperatures.
#
Code
Preset leaving water temperature for the main leaving water
temperature zone in case of NOT weather dependent
[7.4.2.1]
[8-09]
[7.4.2.2]
[8-0A]
[7.4.2.3]
[8-07]
Packaged air-cooled water chillers and packaged air to water heat
Description
Emitter type:
Reaction time of the system:
▪ Quick Example: Small water volume
and fan coils.
▪ Slow Example: Large water volume,
floor heating loops.
Description
Number that users can call in case of
problems.
Description
Comfort (heating)
[9‑01]°C~[9‑00]°C (default: 45°C)
Eco (heating)
[9‑01]°C~[9‑00]°C (default: 40°C)
Comfort (cooling)
[9‑03]°C~[9‑02]°C (default: 18°C)
EWAQ+EWYQ004+005BAVP
4P492900-1 – 2017.06
pumps
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