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Watts Solar Controller LCD PLUS Manual

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2.6.1 Solar Energy
This first block is reserved to calculate the solar energy; it is
possible to select the sensors used for the calculation.
To change a selected sensor, press (►) to highlight the line
and select the choice with (+) or (-) according the
installation.
Flow sensor
- “Auto”
The controller will use the theorical flow (liter/min) entered in
the “Inputs configuration” if no flow meter is available.
- “T6”
The controller will use the impulse meter connected on the
input “T6”.
- “GDS1”
The controller will use the Grundfos vortex sensor “VFS type” if
connected to the GSDS1 input.
Hot sensor
- “Auto”
The controller will automatically choose the corresponding hot
sensor according to the system selected (T1 or T4 collector
sensors).
- “T1” or “T4”
The controller will use the PT1000 sensor T1 or T4 according
to the user selected sensor.
- “GDS1”
The controller will use the temperature sensing element of the
Grundfos vortex sensor “VFS type”.
Cold sensor
- “Auto”
The controller will automatically choose the corresponding tank
sensor according to the system selected (T2 or T4 tank
sensors).
- “T5”
The controller will use the PT1000 sensor T5.
- “GDS1”
The controller will use the temperature sensing element of the
Grundfos vortex sensor “VFS type”.
Note: Do not choose the same sensor for “Hot” and
“Cold”, The energy calculation will be incorrect.
Fluid
- “Water”
The controller will use the heat transfer coefficient of water for
the calculation.
- “Glycol”
The controller will use the Water-Glycol coefficient according to
the percent of glycol selected for the calculation.
Mixing parameter: adjustable from 10% to 50% of Glycol mixed
in the fluid.
Flow (Volume)
- View of the cumulated volume in m3.
It is possible to reset the stored value by holding down on the
(►) & (-) keys for 5 sec.
Energy
- View of the cumulated energy in kWH.
It is possible to reset the stored value by holding down on the
(►) & (-) keys for 5 sec.
Power
- View of the instantaneous power in W.
2.6.2 2nd Energy
The second energy block can be used to calculate or
supervise another circuit, this circuit can be totaly
independant of the solar circuit, (energy supplied by the
additional heat boiler, energy used for D.H.W. etc.).
If it is necessary to use this block, select “Yes” on the “2nd
Energy” line.
The functionality is identical to the above explained 1st
block.
Flow sensor
- “Auto”
The controller will use the theorical flow (liter/min) entered in
the “Inputs configuration” if no flow meter is available.
- “T6”
The controller will use the impulse meter connected on the
input “T6”.
- “GDS2”
The controller will use the Grundfos vortex sensor “VFS type” if
connected to the GDS2 input.
Hot sensor
- “T1” to“T5”
The controller will use the PT1000 sensor T1 toT5 according to
the user selected sensor.
- “GDS2”
The controller will use the temperature sensing element of the
Grundfos vortex sensor “VFS type”.
Cold sensor
- “T1” to“T5”
The controller will use the PT1000 sensor T5 according to the
user selected sensor.
- “GDS2”
The controller will use the temperature sensing element of the
Grundfos vortex sensor “VFS type”.
Note: Do not choose the same sensor for “Hot” and
“Cold”, The energy calculation will be incorrect.
Fluid
- “Water”
The controller will use the heat transfer coefficient of water for
the calculation.
- “Glycol”
The controller will use the Water-Glycol coefficient according to
the percent of glycol selected for the calculation.
Mixing parameter: adjustable from 10% to 50% of Glycol mixed
in the fluid.
Warm point
P1
Function use for solar
calculation of energy
return.
Cold point Flow meter
 Energy measurement -
Flow sensor Auto
Hot sensor Auto
Cold sensor Auto
Fluid Glycol
Mixed 40%
Flow (Volume) xxxxm3
Energy 0kWh
Power 0.0kW
 2nd Energy -
2nd Energy Yes
Flow sensor Auto
Hot sensor Auto
Cold sensor Auto
Fluid Glycol
Mixed 40%
Flow (Volume) xxxxm3
Energy 0kWh
Power 0.0kW
… 12 …


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