Filter
Top Products
A heat meter with pulse output connected at input V
max
(terminal 30) can be used either to limit
the system flow rate (parameter code: U) or the system capacity (parameter code: P). The pulse
weighting of the heat meter (WMZ) and the type of limitation selected must be entered. The dis
-
played value corresponds to the unit l/pulse or kWh/pulse.
When the pulse rate reaches the current maximum limit, the flow set point of the control circuit
RK1 is reduced. How strongly the controller responds is determined by the
Proportional-action
coefficient for limitation
.
Example to determine the limit value:
If a capacity of 30 kW is to be limited, the following limit value must be set for a heat meter with
an output of one pulse per kilowatt-hour:
P
30 kW
1KWh/pulse
30 pulse / h==
Settings for capacity limitation
Functions
WE Configuration
Limitation of heat meter (WMZ) OFF Co5 -> Fb08 = OFF
Pulse input for flow rate or capacity limitation OFF
10
Co5 -> Fb09 = ON,
select:
P
CONST: Limitation constant
4-Pt: Limitation acc. to
4-point characteristic
Pulse weighting / 0.1 to 10
Parameters
WE Parameter level / Range of values
Maximum capacity of the entire system 50 kW PA5 / 0.1 to 5999 kW
Maximum capacity of the DHW heating 50 kW PA5 / 0.1 to 5999 kW
Proportional-action coefficient for the limitation 1.0 PA5 / 0.1 to 10
Select
CONST
additionally for:
Maximum capacity of the heating 50 kW PA5 / 0.1 to 5999 kW
Select
4-Pt
additionally for:
Outdoor temperature Point 1
Point 2
Point 3
Point 4
–15 °C
– 5 °C
5 °C
15 °C
PA5 /–30 to 90 °C
Maximum capacity limitation, points 1 to 4 50 kW PA5 / 0.1 to 5999 kW
EB 5179 EN 65
System-wide functions