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5.2
Differential Thermostats
In addition to simple thermostats, the system regulator also provides 4 differential thermostats. This
function is for implementing the hysteresis control for differential temperatures.
To activate a differential thermostat, select the desired differential thermostat and press the OK button
for 2 seconds (
-->
:
). in the menu 'Settings -> 'Service' -> 'Functions' -> 'diff. thermostats'.
The most important Settings of each activated thermostat can be customized.
In addition to selecting the required temperature inputs W (W = warmer) and C (C = colder) and output
to be controlled, the switching conditions can also be set here. The switch-on condition of 8 Kelvin
(i.e., ‘input W’ around 8 Kelvin warmer than ‘input C’) and a switch-off condition of 4 Kelvin (i.e. ‘input
W’ only 4 Kelvin warmer than ‘input C’) are factory preset.
These values can be changed within certain limits and are interlocked (switch-on condition must be at
least 2 Kelvin greater than the switch-off condition) to prevent erroneous setting.
Since differential thermostats are often used to implement recharging functions, the system regulator
also provides two extra adjustable threshold values (min. temp. input W and max. temp. input C).
These threshold values should prevent, for example, that storage tank 1 cools down too much or
storage tank 2 overheats when recharging storage tank 1 (temperature input W) to storage tank 2
(temperature input C).
If such threshold monitoring is not desired, the values for min. temp. input W and max. temp. input C
must be set outside the expected temperature progression.
The inputs "E1 (regulator)" to "E7 (regulator)" are available on the regulator or the inputs "E1 (IOBox)" to "E4 (IOBox)" are
available on each of the four possible add-on units (for additional IO boxes see Chapter 9.1).
The outputs "R1 (regulator)" to "R4 (regulator)" are available on the regulator or the outputs "R1 (IOBox)" to "R3 (IOBox)" are
available on each of the four possible add-on devices.
5.3
Radiation Switches
The regulator has 2 adjustable radiation switches, with which the individual radiation-dependent
outputs can be controlled.
To activate the radiation select the required radiation in the menu 'Settings -> 'Service' -> 'Functions'
-> 'radiation switches' and press the OK button for 2 seconds (
-->
:
).
To adjust the individual radiation switches as you please the most important Settings can be changed
for each activated radiation switch.
The most important Settings of each individual radiation switch can be customized.
Above all, in addition to selecting the required radiation inputs and outputs to be controlled, the
radiation switch’s threshold can be set. The switch-on radiation and switch-off radiation are factory
preset to 500W/m
2
.The radiation switch does not function with these values because a hysteresis
(radiation difference between switch-on and switch-off value) of 10 W/m² must be present. The switch-
on radiation greater or smaller than the switch-off radiation can be selected. Thus, the different
switching functions (activity above or activity below a specified radiation) can be implemented.
The sensor inputs "E6 (regulator)" to "E7 (regulator)" are available on the regulator.
The relay outputs "R1 (regulator)" to "R4 (regulator)" are available on the regulator or the outputs "R1 (IOBox)" to "R3 (IOBox)"
are available on each of the four possible add-on devices.
