9
Hydraulic diagrams
The hydraulic schemas in this booklet are representative diagrams that illustrate the
principles involved. They are for the purpose of correct choice of program but do not
in any way replace the specialized planning of a system, which is why copying them
does not guarantee that they will function.
Warning: Before using the hydraulic schemas it is absolutely necessary to read the
operating instructions and in particular the chapters "Choice of Program" and "Set
values".
The following functions can be used additionally with every program diagram:
Pump after-running time, Pump speed control, 0 – 10V or PWM output, System
function control, Heat counter, Legionella protection function, Anti-blocking
protection
The following functions only make sense together with solar systems:
Collector excess temperature delimiter, Frost protection function, Start function,
Solar priority, Collector re-cooling function, Drain-back function (only for drain-
back systems)
The outputs A2 and/or A3 from diagrams which do not describe these outputs, can be
logically linked (AND, OR) in menu "Par" with other outputs or used as time switch
output.
In diagrams with a holding circuit (= burner requirement with a sensor, shut-down
function with another one), the shut-down transducer is “dominant”. In other words, if
improper parameters or sensor installation leads to the fulfillment of both the shut-on and
shut-off conditions, the shut-off condition has priority.
Pump valve system of the programs 49, 177, 193, 209, 225, 226, 227, 417, 625:
Speed control (if activated):
Control output COP 1: The speed control only operates when filling cylinder 1. If
max1 is exceeded on the sensor 2 (filling cylinder 2 or 3), the pump is operated on the
highest speed.
Depending on the output mode, the highest speed complies with analogue stage 100
(modes 0-100, MAX = 100)) or analogue stage 0 (modes 100-0, MAX = 100)).
Control output COP 2: The speed control affects all cylinders during filling.
PSC (for standard pumps only): The speed control only operates when filling
cylinder 1.
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