4 | © Danfoss | Energy Meters | 2020.11
AN271156466186en-010201
Installation & User Guide
SonoSensor 30
1. Safety notes and product information
Following instructions refer to the ultrasonic flow sensor. The regulations on the use of energy meters
must be observed! The flow sensor installation is only to be performed by an installation and/or electrical
contractor using personnel trained in the installation and use of electrical equipment and familiar with
the Low Voltage Directive. The relevant ESD regulations (electrostatic discharge) must be observed.
No liability is accepted for damage (especially to electronic circuits) resulting from failure to comply with
the ESD regulations. This installation guide is intended for trained personnel and does not contain any
basic working steps. The seal on the flow sensor must not be damaged! A damaged seal will result in
immediate invalidation of the factory warranty and verification.
2. Installation
2.1 Preparation
Only qualified personnel may install the equipment, following the requirements listed in this document.
More detailed instruction can be found on www.heating.danfoss.com.
Note! This product is approved for ambient temperature between 5-55° C. Avoid installation stress from
pipes and fittings. Flush the system.
2.2 Installation of flow sensor
Depending on the application the flow sensor is installed in the supply or return pipe of the system. The
flow sensor must be installed so that the direction of flow corresponds to the direction of the arrow on the
flow sensor. Calming sections are not needed before or after the flow sensor for sizes from DN15 to DN50,
calming sections of 5xDN before and 3xDN after the flow sensor are needed for sizes from DN65 to DN100.
Flow sensor can be mounted both vertically and horizontally in pipelines. Vertically mounting of the flow
sensor is allowed only if flow direction in the pipeline is from down to up.
The flange gaskets must match with the pipe diameter. During the installation gasket must be exactly
centered with the center of the pipe cross-section to avoid sticking out gaskets inside the pipe. The flow
sensor must always be filled with water. Avoid frost on the sensor. We recommend installing the flow
sensor in a tilted position. The minimum system pressure must be 1 bar to avoid cavitation. Avoid the flow
sensor installation near after the pumps which can also cause cavitation.
Make sure the flow sensor is installed sufficiently far away from possible sources of electromagnetic
interference (switches, electric motors, fluorescent lamps, etc...). The flow sensor should be installed in an
accessible position for service and operating personnel.
Pipe position
: No limitations but avoid positions
where air can be collected.
Rotation in pipe axis
: Flow sensor should be
angled in 45 to 315° to avoid air collection in flow
sensor.
Mi
n 4
5°
Mi
n 4
5°
Min 4
5°
