Boiler cooling temperature
Temperature of boiler cooling off. Above this temperature the controller
activates HUW pump and opens mixer cycles to allow boiler cooling off.
The controller activates HUW pump if this temperature exceeds
maximum value. The controller will not open mixer cycle when mixer
setting = floor active
Parameter B FuzzyLogic
Parameter C FuzzyLogic
Applicable to FuzzyLogic mode. It has an impact on the time necessary
for the boiler to reach the preset value and the stability of the boiler
temperature. It is not recommended to modify the parameters if the
adjustment time and the stability of the preset temperature are as
required.
NO (CH boiler pump is not activated when room thermostat starts
operation),
YES (CH boiler pump is deactivated when room thermostat starts
operating)
CH activation temperature
Parameters determines the temperature at which CH boiler pump is
activated. It protects the boiler against watering due to cooling off with
cold water returning from installation. Attention: Deactivating boiler pump
only does not guarantee boiler protection against watering and
consequently corrosion. Additional automatics should be used, i.e. 4 way
valve or 3 way thermostatic valve.
CH pause when HUW loading*
Available after connecting HUW sensor. Prolonged feeding of HUW silo
during priority HUW deactivated may cause to overcooling of the CH
installation, because CH pump is deactivated. Parameter CH pump
pause during feeding HUW prevents against periodical activating CH
pump during feeding HUW silo. CH pump after this time will activate on
constant, programmed time of 30s.
Available after CH sensor connecting. It is a parameter by which it can
be reduced setting too low preset HUW temperature.
Available after connecting HUW sensor. Parameter determines to what
maximum temperature HUW silo will be heated during cooling the boiler
in alarm situations. It is a very important parameter, because setting too
high value of it may cause risk of scalding with HUW. Too low value of
parameter will cause that during boiler overheating it will not be possible
to cool off the boiler to the HUW silo. During design of HUW installation,
it is necessary to take into account risk of damaging the controller. Due
to breakdown of the controller water in the silo can heat up to dangerous
temperature. It is necessary to use additional protection in the form of
thermostatic valves.
Boiler Increase by HUW and Mixer
Parameter determines how high the boiler temperature will be increased
to load HUW silo, buffer and mixer cycle. Temperature increase is only
realizing when it is necessary. When preset boiler temperature is at
sufficient level then controller will not change it due to the fact of feeding
the HUW silo, buffer or mixer cycle. Increasing preset boiler temperature
during feeding HUW silo is signaled with letter “C” in main window of
displayer
Prolonging of HUW operation*
Available after connecting HUW sensor. After feeding HUW silo and
deactivating HUW pump may be a risk of boiler overheating. It happens
in case when preset HUW temperature was higher than boiler preset
temperature. This issue is exceptionally important in HUW pump
operation in SUMMER mode, when pump is deactivated. To cool off the
boiler HUW pump operation can be prolonged by HUW operation time
prolongation.
Circulation standstill time
Pausing time between periods of circulation pump operation is defined
with value of parameter Circulation stop time (recommended setting 15-
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