Installation Of The Sub-Units; Flow Sensor - Xylem SENSUS PolluTherm Integrator Installation And Operation Instructions Manual

Heat / Cooling meter integrator PolluTherm
Installation and operation instructions

5. Installation of the sub-units

PolluTherm can not only be used as a heat meter
but also as a cooling meter (optional: PolluTherm
H, PolluTherm X H, s. a. chapter 11.10).
Therefore the text hereinafter includes following
terms:
Return pipe of heating systems: Colder line
Supply pipe of heating systems: Warmer line
Return pipe of cooling systems: Warmer line
Supply pipe of cooling systems: Colder line
Examples of installation in heating systems:
Figure 1: Measurement after admixing
Figure 2: Measurement in injection system
Figure 3: Measurement with overflow valve

5.1 Flow sensor

Standard installation of the flow sensor is in the
heating return pipe i.e. the colder line. If the flow
sensor has to be installed in the heating supply
pipe / the warmer line, PolluTherm X has to be
used (X means that the integrator has been
adjusted for flow sensors in the warmer line).
Installation in cooling systems:
It is recommended to install the flow sensor in the
warmer line (return pipe) of the cooling device.
PolluTherm X (installation in warmer line) has to
be used. Please note the approved minimum
temperature when using Sensus flow sensors:
Type AN 130 (DN20 – DN40):
Type MeiStream FS (> DN50):
Type Woltman WPD FS (> DN 50): > 15 °C - 130 °C
An arrow on the body shows the flow direction.
The maximum operating pressure and the
maximum operating temperature must not be
exceeded. When using flow sensors starting from
nominal size DN 50 (Woltman meters). A straight
inlet pipe (area of steady flow) has to be provided
as follows:
Type
WP
WP
After the flow sensor abrupt reductions of the pipe
cross section are not allowed.
It is advisable to install a filter in front of the flow
sensor or at another suitable point of the heating
or cooling circuit as well as shut-off valves before
and after the flow sensor (so that the pipe line
doesn't have to be emptied when the meter has to
be exchanged). Install a fitting piece during the
initial installation instead of the flow sensor and
M H 6111 INT PolluTherm, page 3
> 5 °C – 130 °C
> 5 °C – 90 °C
Area of steady flow
Standard: 3 x DN
After manifolds, rotary pumps,
throttling equipment: Flow
straightener
and 3 x DN