Technische Alternative HZR 65, Инструкция по эксплуатации и монтажу

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Pump speed control Pd1, Pd2
This menu allows activating and adjustment the outputs A1 and A2 for pump speed con-
trol.
Decrease of flow, e.g. in a boiler, causes
– because of the longer dwell time in it – an in-
crease of output temperature. So it is possible to get the boiler and the tank as well to a
useable temperature level in short time, but that causes a worse efficiency.
The sensor creates together with controller, pump and the hydraulic system a control loop,
which makes it possible to keep the temperature at the sensor constant by speed variation.
Three control functions are available; they can be activated together:

Absolute value control
– Maintaining a sensor at constant temperature

Differential control - Keeps the temperature constant between two sensors

Event control - If a set temperature event occurs, the speed control starts, thus keeping
a sensor constant.

Advice: Differential control and event control allow setting the temperature sensor T7 . In
this case T7 means nominal flow temperature Vsoll .
Setting of pump speed control for output A1
Absolute value control
2 sec
2 sec
short
A = Absolute value control
Temperature sensor, whose
temperature is kept constant at
the absolute value
C ( T1 )
ew = 0
Value is changeable from - 6 to 6; negative sign means
inverse function => increasing temperature causes de-
creasing speed. A0 = off
Setting desired temperature C