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Watts Solar Controller LCD PLUS Manual

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Example 2:
All adjustable settings available for this function are accessible
in the Settings menu; see section “Settings” chapter 2 for a
further explanation of the functions.
2.4.3.4 Booster Function
See the previous part P2 for more explanation of this function.
Exemple:
2.4.3.5 Antistagnation Function
The antistagnation function is used in combination with the
Watts
anti-stagnation unit. At times of excessive solar radiation the
solar fluid is protected from stagnation, where otherwise the
heat transfer fluid would vaporize.
If the solar circuit (T1, T4 (when two collector fields)) is heated
to 110°C (default value, can be changed), the relay output P3
and solar circuit P1 are switched ON. P3 is connected with the
3-way valve and fan of the Watts antistagnation unit.
After the solar circuit is cooled down to 90°C (default value,
can be changed), the outputs P3 and P1 are switched off.
Example 1:
Example 2:
All settings adjustment available for this function will be
accessible in the Settings menu, see parts “Settings” chapter 2
for more explanation of the function and possibilities.
2.5 Inputs configuration
- It is possible to configure and monitor all inputs available on
the controller. (Digital or analog inputs)
2.5.1 If no flow meter
Estimated flow input
If no impulse flow meter is installed (factory setting) the flow
must be entered, which can be seen on the flow-meter in the
solarstation.
The flow reading from the glass-scale at the flow-meter can be
entered by marking the value line with (>) and adjusting the
flow-setting with (+) or (-). (Adjustable 1 to 100 L/min with
factory value 10 L/min)
Important Note:
The flow must be read when the pump is running at 100%
speed.
Other heating system
with tank. (Fuel, pellets,
wood ….)
P
3
P
1
TC =
T3
T2
Extra Function used to control the
pump (P3) to warm up "Tcold=T3", if
the temperature difference (dt) to
"Twarm=T4" is sufficient.
T1
TW =
T4
T1
P1
T2
Extra Function to control a
second pump in serie with P1
to help the liquid circulation
startupthe pump coupled with
an external burner.
P3
P3
P1
T2
Extra Function used to cool down the solar circuit
with the TISUN antistagnation units.
T1
P3
P1
T2
Extra Function used to discharge the collector in
another free heat storage or under ground
discharge loop...
T1
 Inputs configuration -
If no flow sensor
Flow (L/min) 10
Grundfos sensors
GDS1
GDS2
Impuls flow meter
T6
Temperature sensor
T1 xxx°C
T2 xxx°C
T3 not used
T4 not used
T5 not used
* In this case the output P3 will need the
power relay “LR 20 3S”installed.
… 10 …


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