Wolf R1 Installation And Operating Instructions Manual page 23

DHW sensor mode
Parameter HG24
HG24
1
Factory setting: 1
Setting range: 1 to 3
Individual setting: ______
Note:
After changing the
sensor operating mode,
switch the system fi rst
OFF and then ON again.
Boiler excess temperature
during cylinder heating
Parameter HG25
HG25
10
Factory setting: 10 K
Setting range: 0 to 40 K
Individual setting: ______
3061809_1210
Contractor level parameters
Using the DHW sensor operating mode, three separate modes
can be applied to the DHW sensor input.
Operating mode 1 is the factory setting for the cylinder
heating mode with electronic cylinder temperature sensors
(accessories).
Operating mode 2 is designed for electronically controlled cylinder
heating with cylinder temperature sensor and also for an external
thermostat demand. In this case, the external thermostat (zero volt)
will be wired on site parallel to the electronic cylinder temperature
sensor. Cylinder heating will be implemented as standard for as
long as the external thermostat demands no heat (contact open).
The boiler circuit and cylinder primary pump are activated when
the external thermostat demands heat (contact closed). The burner
heats the boiler at maximum output to TK-max. Contactor control
provided on site must ensure that an external pump transfers the
heat to the external consumer (e.g. air heater, swimming pool).
Even in standby mode, the thermostat demand has priority over
all other heat demands.
Operating mode 3 is designed to control the cylinder primary
pump with an external thermostat or electronic cylinder temperature
sensor, however without soft start. The cylinder primary pump also
operates if the actual boiler temperature is lower than the DHW
temperature. The external thermostat is connected with zero volt at
the cylinder sensor terminal (SF). This enables the DHW cylinder
primary pump output to be used to control the DHW cylinder
or for other purposes. The switching time program for cylinder
heating (programming module) remains enabled even when if
it operates only as thermostat. The burner heats the boiler to
the set cylinder temperature + excess boiler temperature during
cylinder heating.
Sensor input closed:
Sensor input open:
The excess temperature differential between the cylinder
temperature and the boiler water temperature during cylinder
heating is selected with parameter HG25. The boiler water
temperature continues to be limited by the maximum boiler
water temperature (parameter HG22). This ensures that, even in
spring and autumn, the boiler water temperature is higher than
the cylinder temperature, thereby ensuring short heating times.
The heating circuit pump starts automatically for a limited time, to
prevent the high limit safety cut-out being triggered, if the boiler
water temperature exceeds 95 °C in summer mode whilst the
cylinder is being heated.
Pump ON
Pump OFF
23