Heat generation lock: the heat generator is locked through connecting
terminal H2/H21. All temperature demands for heating circuits and DHW
are ignored. The boiler frost protection function is maintained.
Important
The chimney sweeper function can be applied in spite of the heat
generation lock.
Error/alarm message: Closing the inputs Hx results in a control unit-
internal fault message, which will also be signalled via a relay output
programmed as an alarm output or in the remote management system.
Consumer request VK1/Consumer request VK2: the set flow
temperature setpoint is activated via the connecting terminals (e.g. a
ventilation heater function for door curtain units).
Important
The setpoint must be set under progr. no. 1859/1909/1959.
Release swi pool source heat: closing the input Hx (e.g. manual switch)
enables the swimming pool heater. Heating is performed by means of
'heat generator heating'.
Excess heat discharge: an active excess heat discharge enables, for
example, an external source to force the consumers (heating circuit,
DHW storage tank, heating circuit pump) to draw off the excess heat
using a signal.
Release swi pool solar: this function enables the solar swimming pool
heater to be released externally (e.g. via a manual switch) or the solar
charging priority to be specified as compared to the storage.
Operating level DHW/HCs: The operating level can be set via the
contact instead of via the internal time program (external time program).
Ambient thermostat HCs: With the input a room thermostat request can
be generated for the set heating circuit.
Important
The quick decrease should be switched off for the corresponding
heating circuits.
DHW thermostat: Connection of the DHW thermostat.
Limit thermostat HC: If the extension module is used for the heating
circuit, an external temperature monitor can be cut in at the inlet (e.g. for
underfloor heating).
Start prevention: With this input a burner start can be prevented.
Consumer request VK1 10V/Consumer request VK2 10V: the
application node external load x receives a voltage signal (DC 0-10 V)
as heat request. The linear curve is defined via two fix points (input
value 1/function value 1 and input value 2/function value 2).
Contact type H2/H21 module 1 (7322), Contact type H2/H21
module 2 (7397) und Contact type H2/H21 module 3 (7472)
With this function, the contact can be set as a normally closed contact
(contact closed, must be opened to activate the function) or as a normally
open contact (contact opened, must be closed to activate the function).
Input and function values (7324-7327), (7399-7402) and
(7474-7477)
F1 Function value 1
F2 Function value 2
S Voltage to Hx
U1 Input value 1
U2 Input value 2
V Flow temperature setpoint
The linear sensor curve is defined over two fixed points. The setting is
done with two parameter pairs for function value and input value (F1/U1
and F2/U2).
Fig.37
Example of heat demand 10 V
V
[°C]
F2=130
F2=100
F1=0
S
[V]
U1=0
0,15
U2=10
RA-0000084
9 Settings
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