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Worcester-Bosch Greenstore Manual

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21
Set extra heat curve with mixing valve
If the system comprises underfl oor heating combined with radiators, an extra
heat curve with the mixing valve should be set. The menu is only displayed
when there is an extra sensor, T4 (GT4), on the heat pump. Set the extra heat
curve using two menus: Mix. valve incr/decr and Mix. valve fi ne-tune.
Increase or decrease the mixing valve
1. Press and hold the Heat button until Access = CUSTOMER2 is displayed.
2. Press the Heat button.
3. Turn the menu dial clockwise until the menu Mix. valve incr/decr is
displayed.
4. Press the Adjust button.
5. Turn the menu dial clockwise to choose a higher heat curve.
Turn the menu dial anti-clockwise to choose a lower heat curve.
6. Save the new value by pressing the Save button.
Note
The initial position of the fl oor heat-
ing circuit should be set to heat curve
2. The scale covers the range 0 to 10.
Extra heat curve with mixing valve
only works with an extra fl ow sensor
T4 (GT4).
Fine-tune the mixing valve
1. Press and hold the Heat button until Access = CUSTOMER2 is displayed.
2. Press the Heat button.
3. Turn the menu dial clockwise until the menu Mix. valve fi ne-tune is
displayed.
4. Press the Adjust button.
5. Turn the menu dial clockwise to set an upward, parallel offset on the curve.
Turn the menu dial anti-clockwise to set a downward parallel offset on the
curve.
6. Save the new value by pressing the Save button.
Note
The example describes how to fi ne-
tune the extra heat curve. The scale
covers the range -10ºC to +10ºC.
Extra functions - Customer level 2
Mix. valve incr/decr
0 2,0 10
Return adjust
Mix. valve fi ne tune
-10° -0,0° 10°
Return adjust
… 21 …


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