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14.3
CH and HW
CH and HUW settings
CH activation temperature
Parameters determines the temperaturę 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 stand loading pause when
HW *
Available after connecting HW sensor. Prolonged feeding of HW
silo during priority HW deactivated may cause to overcooling of
the CH installation, because CH pump is deactivated.
Parameter CH pump pause during feeding HW prevents against
periodical activating CH pump during feeding HW silo. CH pump
after this time will activate on constant, programmed time of
30s.
Min. HUW temp. *
Available after CH sensor connecting. It is a parameter by
which it can be reduced setting too low preset HW
temperature.
Max .HUW. temp. *
Available after connecting HW sensor. Parameter determines to
what maximum temperaturę HW 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 HW. Too low value of parameter will cause that
during boiler overheating it will not be possible to cool off the
boiler to the HW silo. During design of HW 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 inc. by HUW, Mixer
Parameter determines how high the boiler temperature will be
increased to load HW 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 HW silo, buffer or mixer
cycle. Increasing preset boiler temperature during feeding HW
silo is signaled with letter “C” in main window of displayer.
Extending HUW pump operation
time *
Available after connecting HW sensor. After feeding HW silo
and deactivating HW pump may be a risk of boiler overheating.
It happens in case when preset HW temperature was higher
than boiler preset temperature. This issue is exceptionally
important in HW pump operation in SUMMER mode, when
pump is deactivated. To cool off the boiler HW pump operation
can be prolonged by
HW operation time prolongation
.
Circulating pump standstill time
*
Parameters available after connecting additional module MX.03.
Pausing time between periods of circulation pump operation is
defined with value of parameter
Circulation standstill time
(recommended setting 15-40 min.) Circular pump operates
constantly during
circulation operation time
. (recommended
setting 60-120s)
Circulating pump operation
time *
Exchanger *
Parameter available after activating option Show advanced
setup = YES. It only refers to hydraulic installation with heat
exchanger between open and closed circuit, point 12.13.
Available options:
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