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After completing the cylinder heating (the cylinder has reached
the set temperature), the cylinder primary pump will run on up
to the maximum set run-on time. The cylinder primary pump
will switch OFF prematurely if, during the run-on time, the boiler
water temperature has fallen to a differential between boiler and
cylinder water temperature of 5 K, to prevent the boiler cooling
down too severely.
Cylinder primary pump
run-on time
Parameter HG19
HG19
3
Factory setting: 3 min
Setting range: 0 to 10 min
Individual setting: ______
Cylinder heating commences as soon as the cylinder temperature
sensor demands heat. The heating circuit pump would be
constantly switched OFF, if the boiler was undersized, the cylinder
was scaled-up or if DHW was constantly drawn off during DHW
priority mode. The accommodation cools down severely. An
option enables a max. cylinder heating time to be specified to
limit this effect. The control unit reverts to heating mode, when the
set cylinder heating time has expired and cycles in the selected
rhythm between heating and cylinder heating mode, irrespective
of whether the cylinder has reached its set temperature or not.
This function remains enabled even in parallel mode (parameter
A10 set to 1). It is only disabled if it is set to 0.
Set this parameter to 0 in heating systems with a high DHW
consumption, e.g. hotels, sports facilities, etc.
Max. DHW cylinder
heating time
Parameter HG20
HG20
2
Factory setting: 2 h
Setting range: 0 to 5 h
Individual setting: ______
Contractor level parameters
Summary of Contents for R1
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