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Worcester Greenstore System Manual

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In cold weather (below +5ºC):
If the indoor temperature, when it is colder than +5ºC outdoors, is not satisfac-
tory, the slope of the heat curve should be changed as follows:
1. Press the Heat button in the initial menu.
2. Press the Adjust button.
3. Turn the menu dial clockwise to increase the heating.
Turn the menu dial anti-clockwise to lower the heating.
(Adjust in small increments, 0.2-0.6 units, is usually enough.)
4. Save the new value by pressing the Save button.
Basic functions - Customer level 1
Dashed line:
If the return temperature exceeds 57ºC an alarm is given and the compres-
sor switches off. The heat pump starts automatically when the return
temperature falls below 57°C.
Wait at least one day when increasing
or decreasing the heating before mak-
ing a new adjustment.
If it is still diffi cult to get a comfort-
able indoor temperature at an outdoor
temperature around 0ºC, despite
several attempts, adapt the heat curve.
Read about how to adapt the curve in
the section Extra functions – Cus-
tomer level 2 / Temperature settings
/ Adapting the heat curve.
Note
Change the curve slope
The heat pump’s production of heat is adjusted by increasing or decreasing
the curve slope in the Temp. incr. / decr. menu. This is especially effective
in cold weather conditions.
Return temperature (ºC) Curve slope (0-10)
Outdoor temperature (ºC)
Temp. incr. / decr.
0 4,0 10
Return Adjust
Temp. incr. / decr.
0 5,0 10
Return Save
Curve slope:
2-4 Normal setting for fl oor heating..
4-6.5 Normal setting for radiators.
7-10 Abnormal high setting.
Curve slope 4 gives a return tempera-
ture of +35ºC when it is 0ºC outdoors.
If the outdoor temperature drops the
return temperature increases. The
colder the outdoor temperature the
higher the return temperature. At an
outdoor temperature of approximately
-30ºC the curve slope has nearly
reached the limit value (+57ºC) for the
return temperature.
… 14 …


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