Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 11 Logic functions 2017-09-29
11.2.9 Priorities
For Comparator operations, the following priorities apply:
1. On/Off during wiring test
2. Off by "Off time minimum"
3. On by "On time minimum"
4. Off by "Switch-on delay"
5. On by "Switch-off delay"
6. Comparison of inputs Switching value A and B
11.2.10 Troubleshooting
The output for the Comparator is set to "Off" when the input values are compared to
various units or when there is a sensor error on the input.
11.2.11 Application example solar DHW
The following example shows a proposed solution for solar DHW.
Solar DHW starts if the temperature difference between the solar sensor and the DHW
sensor bottom is higher or equal to the defined limit.
Solar DHW is switched off if the temperature difference between the solar sensor and
the DHW sensor bottom is lower or equal to the defined limit.
The solar DHW is switch-off in any case when reaching the defined switching value
[Logic A Switching value 2].