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Fig.35
Voltage_value/Function_value
Tr [°C]
F2=100
F1=0
U1=0V
0,15V
7703301 - 01 - 16072018
Start prevention: With this input a burner start can be prevented. The
boiler also remains blocked for all other protection functions.
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 (voltage
value 1/function value 1 and voltage value 2/function value 2 (only
applies to H1).
Output request 10V: The generator receives a voltage signal (DC 0...10
V) as output 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).
Temp measurement 10V: The controller receives a voltage signal (0 - 10
V DC) as a signal for the measured temperature. The corresponding
temperature is calculated via the linear curve, which is defined via two
fixed points (voltage value 1/function value 1 and voltage value 2/
function value 2).
Flow measurement Hz: A flow sensor can be connected here which
indicates the flow volume via a frequency. The measured frequency
signal is converted into a flow rate signal using a parametrisable curve
function. This flow rate signal can be assigned to either the domestic
water flow rate or the boiler flow rate. If the flow rate measurement is
parametrised for both the boiler flow rate and the domestic water flow
rate, a fault code "152 parametrisation fault" with the fault response of
preventing start-up is generated.
Contact type H1 (5951) Contact type H4 (5971) and Contact
type H5 (5978)
With this function, the contacts can be set as 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 H1 (5953), Voltage value 2 H1 (5955) ,
Function value 1 H1 (5954) and Function value 2 H1 (5956)
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).
The function value is specified to a factor of 10, i.e. if you require 100°C,
you should select "1000".
Example: Consumer request VK1 10V
0 V = 0 °C
10 V = 100 °C
U2=10 V
Hx [V]
Tr
Set point temperature
RA-0000925
Hx
Input value to Hx
U1
Input value 1
F1
Function value 1
U2
Input value 2
F2
Function value 2
The controller receives a voltage signal (DC 0...10 V) as a signal for the
consumer request. The corresponding target value is calculated via the
linear curve, which is defined via two fixed points (input value 1 = 0 v /
function value 1 = 0 and input value 2 = 10 V / function value 2 = 1000). If
the input signal does not reach the limit value of 0.15 V, the heat request
becomes invalid and, therefore, ineffective.
9 Settings
117
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