DIFFERENTIAL TEMPERATURE
CONTROLLER FOR SOLAR HEATING
WITH TWO SOLAR BACKING
Ver.06
MICROSOL II plus
1 - DESCRIPTION
Differential temperature controller for automation of solar heating systems,
MICROSOL II plus
becomes simple the management of the temperature of the water in the thermal reservoirs and
swimming pools, use the solar energy better. It has functions that prevent the water overheating and
freezing in the tubings.
It acts in the command of the water circulation pump through the differential of temperature between the
solar collectors and the thermal reservoir or swimming pool. It makes use of two solar backing outputs,
that can be electric, gas, diesel or also to program the filtering of the swimming pool.
In addition, it features a real
time scheduler that allows programming a weekly schedule with up to four daily events and a clock with
internal battery to guarantee its synchronism, even in the energy lack, for a few months.
It is a dedicated instrument that has all its parameters of configuration protected by access code.
2 - APPLICATION
• Solar heating pumped systems
Output AUX2 can
also be used to program pool filtration or as thermostat for water circulation in the keg so the hot water
takes less time to reach the consumption point, thus wasting less water.
3 -
- Power supply:
Microsol II plus: 115 or 230Vac ± 10% (50/60Hz)
Microsol II L plus: 12 or 24Vac/dc
- Control temperature:
Sensor 1: -50 to 200°C / -58 to 392°F
Sensors 2 and 3: -50 to 105°C / -58 to 221°F
- Resolution:
0.1°C between -10 and 100°C and 1°C in the rest of the range
1°F in all range
- Dimensions:
71 x 28 x 71mm
- Operating temperature:
0 to 50°C / 32 to 122°F
- Operating humidity:
10 to 90% RH (without condensation)
- Sensors:
MICROSOL II plus
has three sensors:
Sensor 1 - Panels (or solar collector) - Metal capsule - Silicone
Sensor 2 - Pool (or thermal reservoir) - Plastic capsule - PVC
Sensor 3 - Sensor for control of solar backings - Plastic capsule - PVC
- Control outputs:
PUMP -
Water pump or solenoid - 5(3)A / 250Vac 1/8HP
It has 2 outputs for solar backing (support system)
AUX1 - Solar backing 1 - 5(3)A / 250Vac 1/8HP
AUX2 - Solar backing 2 - 5(3)A / 250Vac 1/8HP
What are solar backing (or support systems)? hey work as backup for the solar heating system on rainy
and cold days. Usually they are gas burners, electric heaters, or heat exchangers (heat pump). If the
solar heating is not sufficient to heat the water (either from the thermal reservoir and the pool), the solar
backings are activated to warm it. Remembering that
the SENSOR 3 is responsible for driving the solar
backings (support systems). This controller is equipped with an internal circuit, which assures clock
synchronization in the event of power outage for a period of 24 hours. However, it should initially be
charged for a period of 10 hours or whenever the equipment remains off for a period of over 24 hours.
TECHNICAL SPECIFICATIONS
4 - ADVANCED SETTINGS
- How to adjust the temperature of the swimming pool
or the reservoir?
Hold the key for 5 seconds until it display . This parameter enable to set the desired
temperature of the swimming pool or the reservoir.
4.1 - To access the options menu
Press and simultaneously for two seconds until it appears , then releasing it. When
appears press (tap) and enter the code (123) through keys and . To confirm,
press the key . Through the keys and access the other functions and proceed in the same
manner to adjust them. To leave the menu and return to normal operations, press (long hit) until
appears.
4.2 - Options
Access code entry
Advanced configuration functions
Events planner operating mode
Scheduling in the events planner
Adjustment of the clock and the day of the week
IMPORTANT
SET
SET
SET
4.2.1 - Settings parameters
CELSIUS
Fun
FAHRENHEIT
Indication of the preferential temperature
Differential for turning on the water circulation pump
Differential for turning off the water circulation pump
Minimum temperature at S1 to switch on the pump
Pump switch on delay
Negative differential (S1-S2) to switch on the pump to
dissipate heat
Minimum temperature at S2 to allow activating heat
dissipation
Antifreeze S1 to switch on the pump
Antifreeze hysteresis
Minimum antifreeze time
Overheating temperature S1 to switch off the pump
Overheating hysteresis to switch on the pump
Overheating temperature S2 to switch off the pump
Overheating hysteresis to switch on the pump (S2)
Solar backing 1 operating mode
0
1.0
1.0
-50.0
0
-40.0
0.0
-18
0.1
0
0.0
0.1
0.0
0.1
0
-
°C
°C
°C
sec.
°C
°C
°C
°C
sec.
°C
°C
°C
°C
-
3
40.0
40.0
200
999
0.0
105
10.0
20.0
999
200
20.0
105
20.0
1
0
1
1
-58
0
-72
32
-1
1
0
32
1
32
1
0
3
72
72
392
999
0
221
50
36
999
392
36
221
36
1
-
°F
°F
°F
sec.
°F
°F
°F
°F
sec.
°F
°F
°F
°F
-
Solar backing 1 temperature setpoint
Solar backing 1 activation hysteresis
Minimum value for solar backing 1 temperature setpoint
Maximum value for solar backing 1 temperature setpoint
Solar backing 1 manual activation time
Solar backing 2 operating mode
Solar backing 2 temperature setpoint
Solar backing 2 activation hysteresis
Minimum value for solar backing 2 temperature setpoint
Maximum value for solar backing 2 temperature setpoint
Solar backing 2 manual activation time
Cyclic timer on time
Cyclic timer off time
Event schedule linking mode
Minimum S1 temperature alarm
Maximum S1 temperature alarm
S1 temperature indication offset
S2 temperature indication offset
S3 temperature indication offset
Water pump activation mode
RS-485 network address
-50.0
0.1
-50.0
-50.0
0
0
-50.0
0.1
-50.0
-50.0
0
1
1
0
-50.0
-50.0
-5.0
-5.0
-5.0
1
95
1
-58
221
0
1
86
1
-58
221
0
1
1
0
-58
392
0
0
0
1
221
36
221
221
999
8
221
36
221
221
999
999
999
3
392
392
9
9
10
247
-58
1
-58
-58
0
0
-58
1
-58
-58
0
1
1
0
-58
-58
-9
-9
-9
1
35.0
1.0
-50.0
105
0
1
30.0
1.0
-50.0
105
0
1
1
0
-50.0
200
0.0
0.0
0.0
1
°C
°C
°C
°C
min.
-
°C
°C
°C
°C
min.
min.
min.
-
°C
°C
°C
°C
°C
-
-
105
20.0
105
105
999
8
105
20
105
105
999
999
999
3
200
200
5.0
5.0
5.1
247
°F
°F
°F
°F
min.
-
°F
°F
°F
°F
min.
min.
min.
-
°F
°F
°F
°F
°F
-
-
4.2.1.1 - Parameters description
Indication of the preferential temperature
It allows the preferential temperature indication to be configured. You may choose between:
Shows the panel temperature (solar collector);
Shows the swimming pool or thermal tank (bath) temperature;
Shows the solar backings temperature (support systems);
Shows the difference (°C) between the solar panel (sensor 1) and the swimming pool or
thermal tank (sensor 2).
Differential for turning on the water circulation pump
Allows configuring the temperature difference in degrees between sensor 1 and sensor 2 for
MICROSOL II plus
to turn on the water circulation pump.
Differential for turning off the water circulation pump
Allows configuring the temperature difference in degrees between sensor 1 and sensor 2 for
MICROSOL II plus
to turn off the water circulation pump.
Exemple:
F02= 8.0
F03= 4.0
When sensor 1 (panel) is at 35°C and sensor 2 (swimming pool or tank) is at 23°C, the difference is 12ºC,
thus the circulation pump must be on (35-23 = 12, more than 8). With time the difference between sensor 1
and sensor 2 tends to decrease. Thus when the difference between sensor 1 and sensor 2 reaches 4ºC
(function F03), the circulation pump will be turned off (35-31 = 4).
The thermostat panel has an indicator LED "
PUMP
" (upper left). When the LED is on, the pump is on.
When the LED "
PUMP
" is off, the pump is off.
Minimum temperature at S1 to switch on the pump
Prevents the pump from being turned on when the temperature of the panel (collector) is below the
required temperature, thus preventing warm or cold water from circulating through the system, which
would cause higher power consumption.
Pump switch on delay
This function protects the pump from burning out in case of power fault (counts the time in seconds).
Example: When there is a power fault and the power is restored immediately after,
MICROSOL II plus
will first count the time programmed in function F05 before activating the circulation pump. This function
also helps to reduce the voltage surge that can happen in the protection devices (circuit breakers) when
activating many loads at the same time.
To deactivate this function, just decrement the value until the
message is displayed.
SET
Description
Min Max Unit Standard
Standard
Min Max Unit
1
8.0
4.0
-50.0
0
0.0
105
8.0
5.0
0
90.0
1
105
1.0
0
1
14
7
-58
0
0
221
46
9
0
194
1
221
1
0
MCSOL2V06-01T
-15124
Negative differential (S1-S2) to switch on the pump to dissipate heat
If the temperature in the tank or swimming pool is too high,
MICROSOL II plus
turns the circulation
pump on (even if the water in the panels is cool) to cool the consumption water a little (swimming pool or
thermal tank).
increase
Minimum temperature at S2 to allow activating heat dissipation
As a safety measure, the user can use this function to configure the minimum temperature at sensor 2 to
dissipate heat.
increase
To deactivate this function, just
the value until the message is displayed.
To deactivate this function, just
the value until the message is displayed.
Antifreeze S1 to switch on the pump
The technician uses this function to configure a temperature value to prevent the panels from freezing
(in cold regions). When sensor 1 reaches the programmed temperature, the circulation pump is turned
on. To deactivate this function, just decrement the value until the message is displayed.
Antifreeze hysteresis
The temperature difference in sensor 1 (panel) for the antifreeze to be turned off.
Example:
F08= 5.0
F09= 1.0 difWhen sensor 1 measures 5°C (function F08), it will interpret that the temperature is dangerous
and can freeze the panels. It activates the circulation pump so that a little warm water from the pool or tank
passes through the panels. Thus, after raising 1°C (function F09), the temperature reaches 6ºC and the
pump is turned off (5+1=6).
Minimum antifreeze time
This minimum pump on time is a safety measure to ensure that the water can pass through all the panels.
This function is frequently used in large installations due to the number of panels required.
