Weather Compensation; Heating Curves - Dimplex A8M Installation Manual

4.4.11 Weather compensation

The biggest factor in defining the heat demand required for a building is typically the weather. Which
affects the required heat load for a building. Weather compensation works by adjusting the set point
temperature of the heating system to reflect changes in the outside (external) temperature, allowing the
heat pump to operate more efficiently.
Weather compensation is determined by the heat curve settings for the system. The pre-defined heating
curves should only be modified by an installer to best match the heat emitters used.

4.4.12 Heating curves

Each zone is associated to a pre-set heat curve. Selecting the zone and pressing Next will allow you to
assign a pre-set curve for typical heat emitters.
The four pre-set heating curves are shown the table below.
Each curve can be reviewed and modified to meet the requirements of the heating system by selecting
Edit.
This will bring you to a default heating curve for the selected emitter. Selecting Next will select the default.
The pre-defined curves have recommended temperature ranges for each heat emitter;
Heat Emitter Type
SmartRad
Underfloor Heating
Standard Radiator
Custom (flat line)
The values that generate the heating curve graph can be changed, by scrolling through the temperature
value to adjust and setting it.
This is validated using the Set button when complete (see figure 32).
Figure 32: SmartRad
Heating Curve
Millbrook House, Grange Drive, Hedge End, Southampton, SO30 2DF
Table 5: Heating Curve Parameters
Max. Water Temp. At Low External Temp.
48°C
30°C
55°C
55°C
• The green line on the right indicates the maximum outdoor temperature at
which space heating stops running (DHW is still adjusted independently).
• The yellow line on the left indicates the minimum outdoor temperature at
which the bivalent heating system starts working and may need to be adjusted
depending on the location/property.
• The red line indicates the temperature that the water will be heated to, based
on the outdoor temperatures.
• The Def option will reset the pre-defined values. Nxt will save entered values.
Min. Water at High External Temp.
-10°C
-10°C
-10°C
-15°C
39
35°C 10°C
25°C 12°C
40°C 15°C
55°C 15°C
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