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Regumaq X-45
Operation
8.8
Circulation
If you use the circulation set, you can confi gure the
function in the controller menu.
Observe the operating instructions supplied with the
circulation set.
R1 and PWM1 are mandatorily provided for the circulation
function. Connect the electrical connections for the
circulation to the contacts R1 and PWM1 (see Fig. 7 on
page 20). Assign the corresponding outputs to the
circulation in the programming. If you have already
assigned other functions to these outputs, the message
"Not possible, R1 in use" appears when you try to activate
them.
There are 5 operating modes available for the circulation
function. When one of the modes is selected, the
associated setting parameters appear.
8.8.1
Off
The circulation pump is permanently switched off.
8.8.2 On demand
You can activate the circulation automatically via the
volume fl ow sensor (position
manually via a tactile contact.
The default setting is control via the volume fl ow sensor.
When you request hot water at a draw-off point, a fl ow is
measured at the volume fl ow sensor and the controller
switches on the circulation pump. The impulse duration
required for this can be set by the parameters "Min.
impulse duration" and "Max. impulse duration".
If you want to activate the circulation manually, use a free
sensor input and connect it to a push button.
The assigned sensor input is monitored.
If a demand is detected, the circulation pump is switched
on.
You can set the running time. After the running time has
expired, the circulation pump is switched off again.
You can set a waiting time. During the waiting time, the
circulation pump remains switched off even if a demand is
detected at the assigned sensor.
8.8.3 Thermal
The circulation pump is controlled depending on the
temperature measured at the temperature sensor for
potable water (cold)/circulation S3 (position
page 11).
•
The pump is switched on when the measured value is
6 Kelvin below the setpoint value.
•
The pump is switched off when the measured value is
2 Kelvin below the setpoint value.
8.8.4 Continuous operation
Continuous operation means that the circulation pump
runs 24 hours at a stretch without interruption or switch-
off criterion.
8.8.5 Timer
The circulation pump is switched on within the set time
frames (see par. 8.5 on page 40), and switched off
outside.
42
5
in Fig. 1 on page 11) or
12
in Fig. 1 on
8.9
Additional functions
8.9.1
Return stratifi cation
The return stratifi cation serves to protect the temperature
stratifi cation in the storage cylinder from mixing while the
circulation is active. If the temperature difference between
the return sensor and the storage cylinder sensor (store
sensor) exceeds the switch-on temperature difference
(5 K), the relay for return stratifi cation is switched on. The
return fl ow is fed into the upper storage cylinder section.
If the temperature difference between the return sensor
and the storage cylinder sensor (store sensor) falls below
the switch-off temperature difference (3 K), the relay is
switched off. The return fl ow is fed into the lower storage
cylinder section.
The actuator for the return stratifi cation ball valve
must be confi gured in such a way that, when
de-energised, the return water is directed into the
lower storage cylinder section. To obtain stratifi -
cation in the upper storage cylinder section, the
storage cylinder sensor (store sensor) must be in-
stalled in the upper storage cylinder section.
S4
T
Fig. 28:
Return stratifi cation
S3
R2
138114082-V04.04.2022
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