30 OIO 14en Edition 07/2017 Operating Instructions
Electrical connection
Installation, removal and connection
1. Remove the protective covers and store them.
2. Install the flowmeter stress-free in the pipe system while taking the preferred direction of flow into
account and ensure that the connections of the pick ups and temperature sensors remain
accessible.
3. The screw-in length of the piping may not exceed the threaded length of the flowmeter, since the
flow cross-section is narrowed and internal components can be damaged.
Electrical connection
Safety instructions for electrical installation
► Observe the corresponding operating instructions for pick ups, temperature sensors and
electronic equipment.
Connection for the pick ups
The flowmeter can be equipped with two pick ups for flow direction detection. The first signal measures
the flow rate, the second signal determines the direction of flow. The pick ups have to be connected
correctly in order to obtain the correct values. The connections are marked on the flowmeter housing
with "1"
and "2". This marking depends on the preferred direction of flow in accordance with the arrow on
the rating plate, see Fig. 2, page 7. In the case of a direction of flow contrary to the preferred direction of
flow the connections have to be swapped in order to obtain a correct signal.
► Observe the corresponding operating instructions for pick ups.
Removing the flowmeter
Prerequisite:
□ System switched off
Aids:
□ Vessel to collect pumped liquid
Observe the following safety instructions during the electrical installation:
□ The following qualifications are required for the electrical connection:
▪ Practical electrotechnical training
▪ Knowledge of the safety guidelines at the workplace
▪ Knowledge of the electrotechnical safety guidelines
► The connecting lines of the connections for pick ups and temperature sensors are to be
shielded and laid separately from the supply lines.
► Ensure that the supply voltage is correct.
CAUTION
Measuring error through incorrectly mounted pick ups.
► Ensure that the pick ups are mounted at the correct position.
DANGER
Risk of death resulting from electric shock while the heating is being removed.
► Ensure that the supply voltage is de-energized.
► The flowmeter may only be separated from the power supply by an authorized electrician.
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