Pereko KSR Beta Pelet 16, Operation And Maintenance Manual

Page: 127 / 184

35
Alarm signaling
Configuration of the alarm output so that it is activated if one or more
selected alarms occur.
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 A FuzzyLogic
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.
Pump off by thermostat
Options available
x
NO (CH boiler pump is not activated when room thermostat starts
operation),
x
YES (CH boiler pump is deactivated when room thermostat starts
operating)
Boiler efficiency
Determination of the% efficiency of the boiler.
14.3 CH and HUW
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 stop during HUW loading
Available after connecting HUW sensor. Prolonged feeding of HUW
container 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 container. CH pump after this time will
activate on constant, programmed time of 30s.
Min. HUW temperature
Available after CH sensor connecting. It is a parameter by which it can
be reduced setting too low preset HUW temperature.
Max. HUW temperature
Available after connecting HUW sensor. Parameter determines to what
maximum temperature HUW container 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 container. 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 container
can heat up to dangerous temperature. It is necessary to use additional
protection in the form of thermostatic valves.
Boiler Increase HUW and Mixer
Parameter determines how high the boiler temperature will be increased
to load HUW container, 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 container, buffer or mixer cycle.
HUW operation extension
Available after connecting HUW sensor. After feeding HUW container
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
extension .