Protection Function; Max Temp Collector; Overheat Protection; Cooling - Watts Water Technologies LCD+ Bedienungsanleitung

Flow (Volume)
- View of the cumulated volume in m
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.

Protection Function

Max temp coll.
Overheat prot.
Overheat temp.

Cooling

Max temp

Recooling

Min temp
Freeze prot.
Freeze prot. Temp.
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:
3
.
-
120°C
Yes
+10°C
Yes
(xx°C) +40°C
Yes
(xx°C) -40°C
Yes
-20°C
- 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)
13