Basic Documentation

118/332
Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Aggregates 03.10.2011
An analog signal can be used as start or stop signal.
The limit values for when the corresponding pump is to be switched on or off can
be set via setting values "[Start value x] ON" and "[Start value x] OFF".
Main menu > Commissioning > Settings > … or
Main menu > Settings > Aggregates > Pump 1...4 >
Operating line Range Factory setting
[Start value 1] on Depending on selected type Depending on type
[Start value 1] off Depending on selected type Depending on type
[Start value 2] on Depending on selected type Depending on type
[Start value 2] off Depending on selected type Depending on type
[Stop value 1] on Depending on selected type Depending on type
[Stop value 1] off Depending on selected type Depending on type
[Stop value 2] on Depending on selected type Depending on type
[Stop value 2] off Depending on selected type Depending on type
10.2.11 "On" by outside temperature
To prevent freezing of water pipes, pumps can be operated permanently at low
outside temperatures.
This functionality is available for single and twin pumps.
To be able to activate the function, the outside temperature must be available (see
section 8.4 "Outside temperature"). This function can be deactivated by setting
operating line
"Outside temp-dependent ON" to "---".
If the outside temperature drops below the set limit value, the controller switches
on the motor of the circulating pump. The pump is switched off when the outside
temperature exceeds the limit value by 2 K.
In twin motor operation, the motor with the current run priority is switched on.
Main menu > Commissioning > Settings > … or
Main menu > Settings > Aggregates > Pump 1...4 >
Operating line Range Factory setting
Outside temp-
dependent ON
----, 50... 250 °C
----
If the function is active and if there is an outside temperature sensor error, the
pump is switched on permanently.
10.2.12 Frost-dependent ON
The pump allows for setting if the maximum of all frost functions is to influence the
pump. To this end, Yes must be set in the "Frost-dependent ON" operating line.
This function can be used for pumps that are to consider frost information, but are
not configured as part of a controller sequence.
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Pump 1…4 >
Operating line Range Factory setting
Frost-dependent ON Yes, No No
Setting values
Note
Setting values
Note
Setting values