Manual Watts Solar Controller LCD PLUS (page 13 of 36) (English, German)

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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.

2.7 Protection function

With this menu it is possible to select and adjust all the

protective functions and parameters of your installation.

2.7.1 Max temp collector

- Setting the start level of the overheat protection for the

collector array.

(Adjustable 110 to 150°C with factory value 120°C)

2.7.2 Overheat protection

This function will stop all collector circulation (P1 and P2) when

the collector temperature increases above “Maxtemp” plus an

offset value (+10°C default value, can be changed). This

function is used to protect the elements of the installation

(Pipe, fitting, ring rubber...)

- To activate the function, press (+) or (-) to select the

“Overheat prot.“ line and press (►) to active “yes” this

function with (+) or (-).

- It is now possible to adjust the offset level

(Adjustable +10°C to +30°C with factory value +10°C)

IMPORTANT: For safety reasons this function should

always be “Yes”

2.7.3 Cooling

- When the “cooling” function is active “Yes”, it is also possible

to activate the “Recooling” function.

This option is used to protect the collector heat transfer fluid

and system as follows; it activates the solar pump P1 or P2 if

temperature of the collector arrays T1 or T4 exceeds the “Max

temp coll.” value even if the set maximum temperature in the

tank is exceeded.

The circulation stops when:

- Temperature in the collector has dropped 10°C.

- Temperature in the tank reaches the cooling “Max Temp”

level (MaxTemp Tankx + xx°C) adjustable 5°C to +40°C with

default value of +10°C.

- If the water temperature in the tank reaches 95°C.

2.7.4 Recooling

When the water temperature inside the tank is above the

setting level “Maxtemp tank X” and the collector temperature is

10°C under the pump is activated to cool the tank through the

collector array (during the night).

The pump will be turned off when:

- The water temperature inside the tank has dropped to the

setting level recooling “MinTemp”“(MinTemp Tankx - xx°C)

adjustable -5°C to -40°C with default value -10°C.

- When the difference between the tank and collector array

temperature is below 2°C.

2.7.5 Freeze protection

This option will keep the solar panel temperature T1 or T4

above the Freeze setting level (see below) by activating the

pump P1 or P2.

This option can be used to reduce snow accumulation on the

panel and increase the efficiency during the day or to avoid

damage by the freezing and expansion of the heat transfer

fluid.

Careful: it is preferable not to use this function in very cold

regions in order not to use too much the energy stored in the

tank

- To activate the freeze and snow protection, press (+) or (-) to

select the “Freeze prot“ line and press (►) to active “yes” this

function with (+) or (-).

- It is now possible to adjust the Freeze setting level

(Adjustable -20°C to + 7°C with factory value 3°C)

2.8 Degrees

- On this menu you can choose the displayed units.

°F: °F, 12H am/pm, Liter, KW and KWh

°C: ° C, 24H, Liter, KW and KWh

2.9 Tubes collector

Select the lines “Tubes collector” and press (►) to highlight

the line.

- Now select with (+) or (-) “yes” if your installation use vacuum

tubes collector. (This choice can be use with flat collector when

the sensor is mounted on the external parts of the collector).

- This function could be used if the collector sensor is not

directly mounted on the collector.

This function works in the following way.

Each 30 minutes the pump will be activated 30 seconds to

measure the correct value on the collector to avoid short

charge cycle.

2.10 Factory setting

Important: For reasons of error protection the selected system

and time settings will not be reset!

- If you want to reload all parameters with factory value select

press (►) to highlight the line. Then select “yes” with (+) key.

- Now press (◄) repeatedly to return to the main menu.

3 Settings Menu

On this menu you have all basic adjustable settings of your

installation.

3.1 Maxtemp tank1

- Maximum value of desired water temperature on the tank1

during normal operation. (Adjustable 15 to 95°C with factory

value 65°C)

3.2 dTON tank1

- Difference between collector temperature T1 and Tank1

temperature T2 to start the main pump1. (Adjustable 4 to 40°C

with factory value 15°C)

3.3 dTOFF tank1

- Difference between collector temperature T1 and Tank1

temperature T2 to stop the main pump1. (Adjustable 2°C bis

35°C (dTMin <=2°C dTMax Tank 1 with factory value 7°C)

 Protection Function -

 Max temp coll. 120°C

Overheat prot. Yes

Overheat temp. +10°C

Cooling Yes

Max temp (xx°C) +40°C

Recooling Yes

Min temp (xx°C) -40°C

Freeze prot. Yes

Freeze prot. Temp. -20°C

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Watts Solar Controller LCD PLUS Manual

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