20 | © Danfoss | 2022.11 LGB53080
Termix VX-IV - 3 Series DS Fully insulated
UPM3 pumps can be controlled under constant pressure, proportional
pressure or constant speed mode as defined by means of an intelligent
user interface.
The variable speed modulating modes allow the pump to match its
performance to the system requirements, helping to reduce noise
when thermostatic valves are closing down.
Energy labelling class A.
Circulator pump UPM3
10
see diagram
Differential pressure controller
The differential pressure controller smooths out the fluctuations in
pressure arriving from the heat network.
The operating pressure in the HIU is thus held steady.
The AVPL can be set within the region of 5 kPa to 25 kPa
(0.05 bar to 0.25 bar).
31
see diagram
Activating the thermoactuators
The thermoactuators are supplied with a “first open” function, which
means that they are slightly open for frost protection until the electrical
controller is installed. During commissioning, the “first open”function
is disabled by removing the red mounting split on the thermoactuator.
Please check that the thermoactuators can fully close following
disabling of the “first open” function.
See the installation guide included with the thermoactuator.
Thermoactuators
69
see diagram
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