Function; Dimensioning And Planning [Specialist] - PAW MVW DN 25 Manual De Instrucciones

4 Dimensioning and planning [specialist]

3.1

Function

The low-loss header allows to equalize the pressure and the flow rate in heating installations
with one (or more) pumps in the boiler circuit and one or more pumps in the consumer circuits,
without that the circuits hydraulically affect each other.
This is especially useful when the flow rates in the heating circuits are subject to large
variations or if only a part of the water from the heating circuits is to pass through the boiler.
In addition, the PAW low-loss headers have a separate flow and return line, as the chambers
are only connected by two bypasses.
Application ranges:
for boilers with integrated pumps

especially for heating installations with condensing boilers

(In this case a low-loss header is often mandatory.)
4 Dimensioning and planning [specialist]
Check during the dimensioning and the planning of the installation , if a low-loss header must be
mounted.
NOTICE
Malfunction!
The pump in the boiler circuit must deliver a higher flow rate than the consumer pumps need
in total. Otherwise, unwanted circulation occurs on the right or left end of the low-loss header.
In this case, mount a hydraulic separator in front of a pressure-tight distribution manifold.
B-5 993x42x3-mub-ml – V01 2017/01