Data Sheet for Product

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Siemens Combi valves, PN 25 CE1N4855en
Smart Infrastructure 2020-10-19
Application examples
Combi valves in HVAC systems combined with variable speed pumps provide even
higher energy efficiency. When sizing the pump, it must be made certain that the
most critical branch or consumer in the system – usually the remotest from the
pump – gets enough pressure (pump head). Thus, it is recommended to use a vari-
able speed pump in constant-pressure mode with end-point feedback, to maintain
a minimum differential pressure across the critical valve.
Residential buildings with for example self-contained flat heating systems:
E = Floor
G = Group or zone
Commercial buildings with for example Fan Coil Units or heat exchangers for heat-
ing or cooling:
Residential buildings
Non-residential
buildings