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Building Technologies Boiler Sequence Controller RMK770 CE1P3132en
HVAC Products 6 Boiler sequence management 23.04.2009
Main menu > Commissioning > Settings > … or
Main menu > Settings > Boiler sequence manager > Fault settings > Fault input 3
Operating line Range Factory setting
Fault text A…Z Underpressure
Impact of fault Stop / No stop Stop
Fault acknowledgement None / Acknowledge /
Acknowledge and reset
Acknowledge
Fault priority Urgent / Nonurgent Urgent
Fault status signal delay 00.00…59.55 m.s 00.05 m.s
The effect of the “Stop“ fault is that the boiler sequence as a whole is shut down. Boil-
ers and pumps are switched off.
The type of fault input can be parameterized at the relevant terminal.
Main menu > Commissioning > Settings > … or
Main menu > Settings > Inputs
Operating line Range Factory setting
Normal position Open / Closed Open
Number Text Effect
2391 [Boiler seq] water short-
age
Can be parameterized
2392 [Boiler sequence] over-
pressure
Can be parameterized
2393 [Boiler sequence] under-
pressure
Can be parameterized
For more detailed information about faults, refer to chapter 13 “Function block “Faults“”.
In addition to the 3 binary fault inputs, the temperature at the main flow sensor can be
monitored. If the main flow temperature does not reach the required level within the
adjustable fault status signal delay, a fault status message is delivered. It is only moni-
tored whether the required temperature is reached. If the temperature is too high, no fault
status message is delivered (reason: in the case of minimum limitation of the boiler tem-
perature or sustained mode, the flow temperature can reach too high a level).
When setting ----, the function is deactivated.
Main menu > Commissioning > Settings > … or
Main menu > Settings > Boiler sequence manager > Fault settings > Supervision
Operating line Range Factory setting
Fault status signal delay ---- / 0…100 h ---- h
A short-circuit or open-circuit of the main flow temperature sensor causes a plant stop
of the entire boiler sequence.
The main return temperature sensor is less crucial. If faulty, there is no plant stop.
Number Text Effect
2396 Main flow temp not
reached
Nonurgent message, must be acknowl-
edged, no plant stop
330 Main flow sensor error Urgent message; must be acknowledged
and reset, plant stop
331 Main return sensor error
Nonurgent message; must be acknowl-
edged, no plant stop
Fault status messages
Supervision of main
flow temperature
Fault status messages
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