Maximum Temperature Limit Heat Generator - Honeywell SDC Service Manual

Hydraulic Components
See also
7.1.3
Function
See also
7.1.4
7.1.5
Function
130
The boiler temperature is maintained according to the set
minimum temperature, independent of demands or deactivating
control modes.
5.2.4 "DHW" menu, pg. 77

Maximum temperature limit heat generator

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 plus 2 K.
5.2.4 "DHW" menu, pg. 77
Heating circuits minimum temperature limit
• If the boiler temperature BT
parameter setting 27 (BT
switch off (DHCP, SFP, MCP). The mixed heating circuit
valves close.
• If BT is greater than BT
actual
circuit pumps and mixed heating circuit valves are enabled
again.
Heat generator sensor control mode
There are various ways in which the heat generator can react to a
malfunction of the heat generator sensor:
Burner switch-off in case of a faulty heat generator sensor
A fault message appears in case of a short-circuit or interruption
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 fault message. It is used, for example, for external
is less than or equal to the
actual
- HC), the heating circuit pumps
min
- HC + SC - HC, the heating
min min
EN2H-0221GE51 R0812
SDC / DHC