Heating control - user manual
www.solarcontrols.cz
Instructions for the installation and setup
of the device
Page 28 of 58
“P-component” – in the case of a PWM-controlled circulation pump it shows the P-component of the
controller of the circulation pump power. You should increase the value only if the pump power for
the given temperature difference is insufficient and if high temperature overshoots occur when the
heating of the boiler is started.
“Output temp. steepness request off-delay” – it shows the delay in the switching off of the circulation
pump when it is switched on by the control according to a).
HEATING CIRCUITS TAB
It includes control blocks for controlling the circulation pumps of independent heating circuits.
Every heating circuit can be controlled in 2 ways:
a)
A room thermostat connected to a digital input – this method will make it possible to use the existing
room thermostat to which the user is accustomed. Due to the higher heat comfort we recommend
using a room thermostat with PI control because it is more or less able to maintain a constant
temperature in a room. We do not recommend using cheaper room thermostats which have only a
two-state control with hysteresis. The room thermostat must have a potential-free switching contact
(relay or optoisolator output).
b)
An internal temperature sensor – in this way the function of the room thermostat is taken over by the
controller and only the internal temperature sensor is placed in the room. In this method of heating
control we do not have to buy a room thermostat, but the disadvantage is that the requested
temperature can be changed only in the web interface of the controller and not by a control element
in the room. We can use the sensor supplied by the manufacturer as the internal temperature sensor
and place it in a suitable installation box or we can use a sensor with the same parameters from other
manufacturers (see the Chapter “Technic).
Caution: If a storage tank is used, at least one heating circuit must be activated and
functional so that the emergency cooling of the storage tank will be functional! For more
information about the cooling of the storage tank see the Chapter “Storage Tank Block”.
Description of configuration and status elements:
“Input – heat source temperature” – a temperature sensor located near the heat offtake from the
storage tank into the heating circuit – typically in the middle of the storage tank. Obligatory for control
according to b).
“Input – room temperature” – a temperature sensor located in the heated room. Obligatory for
control according to b).
“Input – thermostat” – an input to which the room thermostat contact is connected. Obligatory for
control according to a).
“Output – circulation pump” – an output which switches on the circulation pump.
“Thermostat request” – the room thermostat requires the operation of the circulation pump, control
according to a).
“Delayed thermostat request” – ditto, delayed by the “Thermostat request off-delay” item. This delay
is especially useful if the distances between the storage tank and the heated rooms are longer. Control
according to a).
“Tank cool down request” – the storage tank requires cooling down into the heating circuit.
“Thermal control request” – the control according to b) requires the switching on of the circulation
pump.
