Potterton eurocondense four 125 kw, Installation, Operation And Maintanance Manual, Page: 122 / 148

Note
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-in­
ternal fault message, which will also be signalled via a relay output pro­
grammed as an alarm output or in the remote management system.
Consumption requirement VK1/VK2: the set flow temperature setpoint is
activated via the connecting terminals (e.g. a ventilation heater function
for door curtain units).
Note
The setpoint must be set under progr. no. 1859/1909/1959.
Release swimpool source htg: Closing the input Hx (e.g. manual switch)
releases the swimming pool heater. Heating is by means of 'heat gener­
ator heating'.
Excess heat discharge: an active excess heat discharge enables, for ex­
ample, 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 con­
tact instead of via the internal time switching program (external time
switching program).
Ambient thermostat HCs: With the input a room thermostat request can
be generated for the set heating circuit.
Note
The quick decrease should be switched off for the corresponding
heating circuits.
Consumption requirement VKx 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 (voltage value 1/function value 1 and
voltage value 2/function value 2) (only applies to H1).
Contact type H2 module 1 (7312), Contact type H21 module 1
(7322), Contact type H2 module 2 (7387), Contact type H21
module 2 (7397)
With this function, the contact can be set as a resting contact (contact
closed, must be opened for activating the function) or as working contact
(contact opened, must be closed for activating the function).
Voltage value 1 H2 module 1 (7314) to Funct value 2 H2
module 1 (7317), Voltage value 1 H2 module 2 (7389) to Funct
value 2 H2 module 2 (7392), Voltage value 1 H2 module 3 (7464)
and Funct value 2 H2 module 3 (7467)
F1 Function value 1
F2 Function value 2
S Voltage to Hx
U1 Voltage value 1
U2 Voltage value 2
V Flow temperature setpoint
The linear sensor curve is defined over two fixed points. The setting is
made with two parameter pairs for Funktionswert and Spannungswert
(F1 / U1 and F2 / U2).
Funct input EX21 module 1 (7342) , Funct input EX21 module
2 (7417) and Funct input EX21 module 3 (7492)
None: No function.
Counter 1st burner stage: The counter values (operating hours and
starts) for the first burner stage are counted using the signal at input
EX21. If this function is not set, counter values are counted on the basis
of the state of relay K5.
Fig.43 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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