Rotex Controller Series, Product Documentation

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EbV Product documentation THETA NORM/UNIT
8-3
8.1.4 Heat Generator Maximum Temperature Limit (..2.., ..22.., ..C..)
Function: In order to protect the heat generator against overheating, the controller is equipped
with an electronic maximum temperature limit. It shuts off the burner if the
temperature in the heat generator exceeds the limit value.
The burner is switched on again if the temperature in the heat generator falls below
the limit value by half of the burner switching differential 1 plus a reserve of 2 K below
the set limit value.
The setting range, which can be set by the installer, can be limited by an extra
parameter (maximum top limit).
8.1.5 Heat Generator Sensor Mode (..2.., ..22..)
Function: There are various ways in which the heat generator can react to a malfunction of the
H-GEN sensor:
Burner switch-off in case of a faulty H-GEN sensor
A message appears in case of a short circuit or the break of the sensor; the burner
will be switched off.
External Burner switch off
In case of the interruption of the sensor the burner is switched off without a
malfunction message. Application for example as external burner switch-off or
enabling in case of the interruption of the H-GEN sensor.
Caution: Only Ag (hard silver), Au (gold) or Ni (nickel) are to be used for the contacts.
In case of a sensor short circuit a relevant malfunction message appears and the
burner is blocked.
Burner enabling in case of a faulty H-GEN sensor
A message appears in case of a short circuit or the break of the sensor and the
burner is enabled without limitations.
The control of the heat generator is carried out only manually by means of the
mechanical boiler temperature controller (boiler thermostat) on the boiler panel
according to the set value.
Caution: Activating this setting is only permitted if an electromechanic boiler
temperature controller is in series with the burner phase and the boiler
temperature is limited by this BTC. Otherwise, there is the danger of boiler
overheating.
Operation:
Note on operation Key / parameter tree Parameter
Setting maximum temperature
HEAT GENER. PARAMETER 04
Maximum temperature limit
HEAT GENER.ATOR PARAMETER 30
Operation:
Note on operation Key / parameter tree Parameter
Select sensor mode
HEAT GENER. PARAMETER 06