Grant Aerona - Heating Curve Adjustment Guidelines; Circuit Control Settings Overview

Section 6: System Conguration with Touchscreen DisplayPage 22
6.5 COMMON SETTINGS
After the system has been congured, check and if needed
amend some common settings within the Heat pump parameters
menu via the touchscreen display (Refer to Table 6-2).
To access the Heat pump parameters menu:
1. Tap the Settings menu and select 'Service settings' and enter
the password: 1234. Refer to Table 7-1 and Section 9 for full
Heat pump parameters listing.
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User settings
Service settings
Figure 6-8: Settings menu
Table 6-2: Heat Pump parameters
Parameter No. Parameter Title Setting Value
Heat pump Set points
21 00 Weather Comp O󰀨
Frost protection
43 10 Frost Ambient Temp Frost Ambient Temp on
43 11 Start Temp 4°C
43 12 Hys of Ambient Temp 3°C
43 20 Frost Flow Temp ON
43 21 Start Temp 4°C
43 22 Hys of Flow Temp 3°C
Relay output settings
51 07 DHW Cylinder Sensor O󰀨
51 09 Amb Temp Ext Sensor O󰀨
51 11 Bu󰀨er Temp Sensor O󰀨
51 15 Modbus On
6.3.2 HEATING CURVE ADJUSTMENT
The heating curve is adjustable and should be reviewed to ensure
both comfort and economy.
The heating curve is set as part of the initial system conguration
when conguring 'Weather' control but can be edited after the
system conguration has been completed. Refer to Section
7.3.1.3 to access the heating curve setting adjustment, Figure
6-7 and Appendix F.7 for a QR code link to a how to video on
adjusting the circuit heating curve.
Guidelines for adjusting a heating curve
• If the outdoor temperature drops, and the room
temperature increases, the selected heating curve value
is too high.
• If the outdoor temperature drops, and the room
temperature drops as well, the selected heating curve
value is too low.
• If during frosty weather the room temperature is
comfortable, but when it gets warmer the room is too cold,
it is recommended to increase the Heating curve shift and to
select a lower heating curve.
• If during frosty weather the room temperature is too
cold, and when it gets warmer the room is too hot, it is
recommended to decrease the Heating curve shift and
to select a higher heating curve.
Poorly insulated buildings or the use of traditional steel radiators
require setting higher heating curves. Well insulated buildings
and/or low temperature heat emitters e.g. Undeoor heating,
heating curves will have a lower value.
6.4 CIRCUIT CONTROL SETTINGS
6.4.1 FIXED CIRCUIT CONTROL
(Not weather compensated)
If the heat emitter size is known, set the required water
temperature in the circuit using parameter 'Fixed preset water
temperature', e.g., at a value of 50 °C. The value should allow the
room to reach the required temperature.
After connecting the room thermostat, it is necessary to set a
value of decrease in the Decreasing xed water temperature
parameter, e.g., to 3 °C. This value should be selected by trial and
error. Upon activation of the room thermostat, the target circuit
temperature will be decreased, which, if proper decrease value is
selected will stop rise of temperature in the heated room.
6.4.2 WEATHER COMPENSATED CIRCUITS
(Not Fixed)
The Outdoor weather sensor must be installed and congured
to be able to use weather control. Using Heating curve shift,
set target room temperature following the formula: Preset room
temperature = 20°C + heating curve shift.
In this setup, it is possible to connect a room thermostat which
will equalise the inaccuracy of set heating curve, if the selected
heating curve value is too high. In such case, it is necessary to set
the value of parameter Decreasing xed water temperature, e.g.,
to 2 °C.
When the target temperature of the room thermostat is achieved,
the Heat pump target ow temperature will be decreased, when
pump blockade for that circuit is o󰀨. If pump blockade is on, the
circuit pump/valve will close (if installed).