Operating instructions

Instruction SONO 1500 CT
DEN-SMT/PL VI.SH.K1.02 Danfoss District Enrgy
2
Depending on the application (heat or cooling meter), the ow sen-
sor is installed in the forward or return pipe of the system. The ow
sensor must be installed so that the direction of ow corresponds
to the direction of the arrow on the sensor. Calming sections are not
needed before or after the energy meter, but calming sections of
3xDN are recommended before the meter.
The ow sensor can be installed in both horizontal and vertical pipe
sections, but every time so that air bubbles cannot collect in the ow
sensor.
The ow sensor must always be lled with water. Avoid frost on the
meter.
We recommend installing the ow sensor in a tilted (45°) position.
The minimum system pressure must be 1 bar to avoid cavitation.
Make sure the ow sensor is installed suciently far away from
possible sources of electromagnetic interference (switches, electric
motors, uorescent lamps, etc...).
To simplify the removal of the ow sensor it is recommended to
install isolating valves before and after the meter.
The ow sensor should be installed in an accessible position for
service and operating personnel.
Initial operation is to be carried out and recorded after installation.
Use unsealed ow sensors (Flow sensor for heating):
- at water temperatures permanently above ambient temperatures
Use sealed ow sensors (Flow sensor for cooling):
- for cold applications or T
water
< T
ambient
- if permanent condensation is expected
3.0 Installation of ow sensor
5 ... 130 / 150 °C *
5 ... 105 °C **
5 ... 130 °C *
5 ... 90 °C **
* External supply
** With battery supply