EbV Product documentation THETA NORM/UNIT
8-16
8.1.17 External heat generator disable
Function: If the corresponding variable input has a short circuit because of a switching contact,
the heat generator is switched off after all demands are blocked. The logical error
monitoring is switched off. After the short circuit is repaired, the heat generator is
enabled directly.
CAUTION This function is meant exclusively for external override signals and not for safety
switch off of the heat generator!
8.1.18 Adjustment of the heat generator according to the common flow
temperature
common
flow sensor: The sensor connected to the variable input VI-1(2,3) registers the total flow
temperature in thermohydraulic distributors or in the common flow.
The adjustment of the boiler temperature is no longer dependent on the measured
boiler temperature, but on the common flow sensor. The boiler sensor keeps
monitoring the minimum and maximum boiler temperature of the heat generator.
The setpoint is calculated via a PI-algorithm for heat generator type 5.
8.1.19 Features of fuel value heat generator via data bus (MCBA) (..C..)
8.1.19.1 DHW charging in boiler control MCBA
Due to the possibility of separate switching hysteresis settings for MCBA and
THETA, the DHW charging may not be stopped (stays in DHW charge). In operation
with MCBA, the switching differential is no longer adjustable, DHW charging occurs
via MCBA parameterization.
Operation:
Note on operation Key / parameter tree Parameter
Activation external burner block HYDRAULIC PARAMETER 08
PARAMETER 09
PARAMETER 10
Operation:
Note on operation Key / parameter tree Parameter
Activation common flow sensor HYDRAULIC PARAMETER 08
or
PARAMETER 09
or
PARAMETER 10
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