SDC / DHC

Hydraulic Components

 

 

7.3.11.2.9Correction of the heat generator after the total flow temperature

Total flow sensor The sensor connected to variable input 1 (2, 3) measures the total flow temperature in thermohydraulic distributors or in the common flow.

Correction of the boiler temperature no longer occurs based on the measured temperature of the boiler sensor, but rather based on the total flow sensor. The boiler sensor still checks the boiler minimum and maximum temperatures of the heat generator.

Using a PI control algorithm, the behaviour of the heat generator can be influenced by a deviation between the total flow setpoint temperature and the total flow actual temperature.

The PI controller can be influenced via three setting options:

P-part:

Proportional part of the controller

Sample time:

The sample time is a controller-internal value

 

which defines the time interval between two

 

subsequent actuator pulses in the presence of a

 

control deviation.

Adjustment

The adjustment time determines the dynamic

time:

behaviour of the controller based on the set

 

sample time.

Important note for parameter setting:

The factor for the I-part within the controller is related to the parameter setting values as follows:

(Ki = factor for the I-part, Ta = sample time, Tn = adjustment time)

Ki = Kp TaTn

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Honeywell EN2H-0221GE51 R0808 service manual Important note for parameter setting
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