Adjustment Of Room Valve - OEM DC BWA-SS-7 Installation And Maintenance Instructions Manual

CURVE is program that adjusts feed water temperature according outdoor ambient temperature,
factory setting is ambient temperature 0
value of CURVE is adjustable from 22
How to change the slope—two points decide one beeline, point one is (0,40), the other point could be
(18,24), the point (18,24) is not changing when changing the slope, because factory setting is that
heat pump stops when outdoor ambient temperature is 18 , so the feed water temperature should be
24 .
If you wish to change the CURVE value:
1.Open the main menu INFORMATION by pressing the right-hand button once. You will find the cursor
at the sub-menu named OPERATION
2.Press the "down" button to move the cursor to the sub-menu called HEAT CURVE.
3.Press the right-hand button once to open the menu. You will find the cursor at the parameter CURVE
4.Open the selected parameter by pressing the right-hand button once.
5.Increase or reduce the preset value using the "up" or "down" button. You will see from the diagram how
the gradient of CURVE changes.
Press the left-hand button three times to return to the main menu.
Adjus t men t of ROOM value
As mentioned above, you can also adjust heat curve and indoor temperature by changing the ROOM value. If
you use ROOM value to adjust the heat curve, the gradient does not change, i.e. it doesn't become steeper or
flatter. Instead, the whole curve is moved by 1°C for every degree by which the ROOM value is changed.
The relation feed line temperature to outside air temperature will not be affected. The feed line
temperature will be increased or reduced by the same number of degrees all along the heat curve. See the
following diagram.
Adjustment of the ROOM value should only be used for temporary changes of the indoor temperature. For long
term settings, the CURVE value should be adjusted as this is the most energy and cost efficient way to set the indoor
temperature.
For adjusting the heat curve, please refer to the chapter "Adjustment of the CURVE value" on page 33.
You need to choose the " room" on the Sub-menu ( TEMPERATURE ),then press the right button.
Use UP and DOWN button to adjust the " ROOM CURVE" .
Control
Adjustments to be made regularly
as feed water temperature 40 , that is CURVE =40; the
to 56 .
Change of value for CURVE
Factory setting of ROOM value is 20°C.
Changing the ROOM value
32