4
1.
Application
The solar controller is integrated into domestic hot water systems in boilers
(water heaters), combined with solar panels (fireplaces) and electric heaters.
It is designed to monitor the differential temperature and to control the
operation of a circulation pump mounted in the water circuit between the panels
(fireplace, boiler) and the boiler coil. This regulates the heat exchange between
them, helping to make the system more efficient.
2.
How it works
The controller has two temperature sensors installed in the water heater and
the solar panels. The operation of the controller is determined depending on the set
parameters and the measured temperature. The following parameters are monitored
during operation:
2.1
delta T (∆Т)
– Set difference between panel and boiler temperatures
(differential difference). It can be set between 2 and 20 °C.
Default setting is 10
°C;
2.2
Tb
set
– Set temperature in the boiler to which it can normally be heated
by solar panels (fireplace, boiler). It is set in the range from10 to 80 °C.
Default
setting is 60 °C
;
2.3
Тb
max
– Critical, maximum allowable temperature in the boiler. It is set
between 80 and 100 °C.
Default setting is 95 °C;
2.4
Тp
min
– Minimum temperature of solar panels. It is set in the range from
20 to 50 °C.
Default setting is 40 °C
;
2.5
Тp
max
– Maximum permissible temperature of solar panels (fireplace). It
is set between 80 and 110 °C.
Default setting 105 °C
;
2.6
Тp
def
– Defrosting temperature of solar panels. It is set in the range -20 to
10 °C. Default setting without defrost -
OFF
;
2.7
Тb
min
–
Minimum temperature in the boiler below which the defrosting
of the panel is stopped. Cannot be set.
Default setting is 20 °C
;
2.8
t
cool
– Time to delay the boiler cooling function to the set Tbset
temperature. The controller will wait for the time specified in this setting to expire
and if the condition is met Tp<Tb-2 °C, will turn the pump on until it reaches Tbset.
Default setting is 4 hours.
If necessary, a correction can be made in the readings of the measured
temperatures:
Tbc
–
Correction of the reading from the boiler temperature sensor;
Tpc
– Correction of the reading from panel sensor;
The setting is in the range -10 to + 10 °C. The default is 0 °C.
Deviations in the readings of the temperature values can be the result of cables that
are too long or from poorly positioned sensors.
Содержание DT-3.1
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