FW
|
Enable
hot water
|
Enable hot water preparation. Input
is optional; if no variable is connected to the input, the
block is always enabled.
|
FL
|
Enable
Legionella
|
Enable Legionella heat-up. With a
positive edge at the input the Legionella heat-up is
started. The Legionella setpoint is used here; once
this temperature is reached, 0 is sent to the connected variable
and the setpoint for hot water is used again. The
variable at the input can, for example, be set to 1 by a timer;
once the Legionella heat-up is finished, the
variable is set back to 0 by the block. |
T1
|
Boiler top*
|
Actual temperature boiler top.
|
T2
|
Boiler bottom*
|
Actual temperature boiler bottom. |
SW
|
Setpoint hot water*
|
Setpoint temperature hot water
|
SL
|
Setpoint Legionella
|
Setpoint temperature Legionella |
AB
|
Demand
bit
|
Output is set to 1 when the
boiler is heated up. This output can be used for a pump or
heat-generator enable.
|
AP
|
Demand
percent
|
Current setpoint temperature in percent.
This is set with the parameter Factor percent output.
|
AT
|
Demand temperature
|
Current setpoint temperature in degrees. |
ST
|
Status
|
Status bit-coded. Bit 0 = Legionella heat-up active. |
|
Hysteresis
on
|
Hysteresis for
hot water preparation on. If the temperature boiler top falls below
setpoint minus hysteresis, hot water preparation is started. |
|
Hysteresis off
|
Hysteresis for hot water preparation off. If the
temperature boiler bottom exceeds setpoint plus hysteresis and boiler
top is greater than setpoint, hot water preparation is
ended. |
|
Offset setpoint temperature
|
This parameter is added to the output Demand temperature.
It can be used for a setpoint boost. |
|
Factor percent output
|
This parameter sets the percent output. This is
the temperature at 100 percent. With a value of 80, at
setpoint temperature 80, 100 percent is output; at 40 degrees, 50 percent
etc. In the calculation the parameter Offset setpoint temperature is
also added. |
Boiler charging