Xylem SENSUS MID Bedienungsanleitung Seite 7

MID starter kit for heating and cooling meters
PolluCom E, PolluStat, PolluTherm, PolluWatt Duo II installation manual
Fig.1: Measurement in secondary circuit after admixing
Usually heating meters should be installed in the secondary circuit after admixing.
Concerning installation position and length of the flow sensor please also note the installation
manual and instruction of the respective meter. The meter specific instructions are ready to be
downloaded from our web site (homepage www.sensus.com). The flow sensors of PolluTherm with
mechanical flow sensor may only be installed in certain positions!
3.2 Assembly of the installation equipment
The flow sensor and both temperature sensors have to be installed in the same circuit of the heating

/ cooling systems and should preferably be located in the secondary circuit.
 The standard cable length of the separate temperature sensors for PolluCom E, PolluStat,
PolluTherm and PolluWatt Duo II is approx. 1,5 m (special version: approx. 5 m and approx. 10 m).
To lay the cable an empty cable duct or conduit should be used. A minimum distance of 0.3 m must
be kept from high voltage cables.
 In order to achieve accurate temperature measurement the tip of the flow sensor has to be in the
middle of the pipe cross section.
 Install a spool piece during the initial installation instead of the meter and flush the pipe system
thoroughly.
After that remove the spool piece and install the meter with new sealing washers.

 When carrying out pressure testing please check that the components are correctly installed.
3.3 Assembly of the ball valves
 The pipework should be precisely dimensioned and should be laid according to the generally
accepted engineering standards, in order that no mechanical stresses are able to act on the ball
valve. Work on ball valves must take place free of strain, in order that faultless functionality is
guaranteed.
 Apply the correctly sized open-end wrench to the sleeve only on the pipe or fitting side. Attach the
pipe / fitting using a suitable tool and screw it into or onto the ball valve thread.
 When installing in pipework systems avoid screwing pipes in right to the end stop. The varying
expansion of the iron, steel, stainless steel, copper or plastic pipes may otherwise lead to defects or
leaks with temperature fluctuations.
 Ball valves are subject to the maintenance and inspection obligations defined in EN 806 or EnEV
§ 10 and should therefore be actuated regularly, in order to guarantee ease of actuation and safe
operation for the long term. Open and close the ball valve slowly, in order to avoid pressure shocks
in the line system.
If the ball valve is fitted with a packing gland then this can be re-tightened in the event of any leaks

appearing at the spindle.
Fig.2: Measurement in primary circuit before admixing
M H 1131 INT MID starter kit, page 3