Heating control - user manual
www.solarcontrols.cz
Instructions for the installation and setup
of the device
Page 34 of 58
“Always full scale” – if the conditional status is an output which is switched on in the PWM mode
(both fast or slow), the conditioned output will always be permanently switched on.
“Condition met” – it signals a met condition for the switching on of the conditioned output.
DIFFERENTIAL CONTROLLER BLOCK
This control block is also simple and it allows you to control, for example, the solar circuit, the storage tank
destratification circuit or other control automatisms on the basis of a difference between two temperatures.
Note:
This function is available only with the activated SW extension Differential Controllers.
Description of configuration and status elements:
“Input – input temperature” – a temperature sensor at a place with lower temperature. The last item
is the constant temperature option. In this case the value given in the “Constant temperature” box will
be used instead of the temperature sensor.
“Input – output temperature” – a temperature sensor at a place with higher temperature. The last
item is the constant temperature option. In this case the value given in the “Constant temperature”
box will be used instead of the temperature sensor.
“Output – circulation pump” – it switches on the circulation pump of the control circuit.
“Circulation pump request” – the differential controller is active and requires the operation of the
circulation pump.
“Input temperature” – water/medium temperature at a place with lower temperature.
“Output temperature” – water/medium temperature at a place with higher temperature.
“Circulation pump power” – if a PWM-controlled circulation pump is used, it shows its current power
in %.
“PWM-controlled circulation pump” – tick if you use a circulation pump whose power is proportionally
controlled (usually) by means of the PWM signal. In this case the Ext1 or Ext2 outputs must be used.
As the power supply of this pump is usually separated from the signal conductor, it is possible to use
the “Status duplicate” block in the “Others” tab for switching on the power supply on the basis of the
switching on of the Ext1 or Ext2 output.
“Constant temperature” – this value will be used for setting either the input temperature or the
output temperature if it is required that any of these temperatures should be constant instead of a
temperature sensor (constant temperature option in the relevant inputs). Do not use the constant
temperature option for both the input and output temperatures at the same time, because this does
not make any sense and the differential controller will not work at all.
“Max. input temperature” – the control will activate only when the input temperature is under this
limit. If you use a constant as the input temperature, always set this limit higher than the “Constant
temperature” item, otherwise the control will never work.
“Min. output temperature” – the control will activate only when the output temperature is above this
limit. If you use a constant as the output temperature, always set this limit lower than the “Constant
temperature” item, otherwise the control will never work.
“Thermal diff. to switch on” – the control will activate only when the difference between the input and
output temperatures exceeds this limit.
