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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Description of the OEM settings 15.07.2002
6.5 Lower limit of output range (Pmin)
• The minimum output of the boilers controlled by the BMUs can be defined.
Defines the minimum limit of the optimum output range used by the BMUs.
1. Press the line selection buttons to select line 51OEM.
2. Press the + / - buttons to set the minimum limitation of the output.
Setting range Unit Factory setting
5...Pmax % 40
Pmax. = upper limit of output range (operating line 52)
Typically, the set minimum limitation of the output lies above the lowest basic stage of
all BMUs. A lower setting causes several BMUs to cycle Do not use lower settings
without having tested them in practical operation.
The setting defines the minimum limit of the output range within which the BMUs are
controlled. The value is used as the switch-on or switch-off criterion according to the
selected running time strategy (refer to page 129).
Pmin
Pmax
2379Z06
Output range of BMUs
The minimum limit of the output range is crossed only in exceptional cases, e.g. when
the setting of the value is too high, or when, due tot he BMUs' output ratio, an invalid
operational status would result after changeover.
Benefit
Description
Setting
Note
Effect
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