PEE1V03
20-11- 2017
11
- Adapter plate according to figure 8 of EN1434-2:2007 for wall mounting of calculator can be used (if the aperture
in the wall
is too large for the calculator) :
Important:
It is forbidden to attach the calculator directly to a wall if there is a risk that on walls can be
condensed humidity or temperature of a surface of a wall can fall lower than 5 °. In this case, it is
recommended to attach the calculator so that between it and wall surfaces there was an air gap not
less than 5 cm.
5.3.2. Mounting of flow sensors
Sizes and mounting dimensions of flow sensors are provided in Annex B.
Requirements for flow sensor installation in pipeline:
For flow sensors of the heat meter with nominal diameter DN65 to DN100 necessary straight pipeline
length in upstream direction are
5 x DN and in downstream direction -
3 x DN. For flow sensors of other sizes
the straight pipelines installation in upstream and downstream are not necessary.
Avoid the flow sensor installation near after the pumps which can cause cavitations.
Flow sensor can be mounted in horizontal, vertical or inclined positions in return or flow.
Necessary
condition in normal working mode: pipeline must be under pressure and fully filled with heat conveying liquid.
The location and position of the flow sensor must be selected in such a way as to reduce the risk of
accumulation of air bubbles in the zone of ultrasonic sensors (Fig. 5.1).
a)
Permissible installation position
b) The installation position is prohibited.
(the air bubbles may accumulate)
Fig.5.1.
Mounting Position of the flow sensors qp 3,5 m
3
/h... qp 60 m
3
/h
