Set The Heating - Worcester GREENSOURCE User Manual

Set the heating

The simplest way to set the heating has been described earlier under
the heading Menu. There is a more controlled way of setting the
heating. However, before we explain how to do this it is important to
understand the relation between the outdoor temperature and fl ow
temperature . The easiest way to explain the relation is by a Heat curve.
Heat cur ve
The heat curve is used to set the desired indoor temperature. The heat
pump is controlled by the outdoor temperature. When the weather
becomes colder the heat pump ensures more heating is produced
automatically.
The following example shows that an outdoor temperature of –2.5ºC
gives a fl ow temperature of 35ºC at the current heat curve.
Flow temperature:
The fl ow temperature is the temperature of the water that is fed into the
heating system.
Outdoor temperature:
The outdoor temperature determines how much heating the heat pump
should produce. The outdoor sensor sends signals to the control unit,
which then affects the heat pump.
Cur ve slope:
By offsetting the left (V) and /right (H) end points, the slope of the heat
curve can be altered. Use the left end point to adjust the fl ow tempera-
ture at high outdoor temperatures and the right end point to adjust the
fl ow temperature at low temperatures.
Adjusting a single value:
You can also adjust a single value on the curve up or down every fi fth
outdoor degree. You can, for example, create an increase in the heat
curve at 0ºC.
Flow temperature (ºC)
On delivery of the heat pump, the
curve slope is set at V=20, H=55.2.
Cur ve slope:
V=22, H=30: Normal basic setting for
underfl oor heating in concrete.
V=22, H=35: Normal basic setting for
underfl oor heating in wooden joists.
V=20, H=55: Normal basic setting for
radiators.
V=20, H>65: Abnormal high setting.
17
Advanced menu
Outdoor tem-
perature (ºC)
Note