Electrical Installation; Commissioning The Dgma; Setting The Flow; Setting The Switch Point Of The Flow Sensor - ProMinent DULCOMETER Assembly And Operating Instructions Manual

Assembly and Installation / Commissioning the DGMa
Page 26
5.3

Electrical Installation

WARNING
• Connect the flow sensor to extra-low voltage circuits only ((SELV) in
accordance with EN 60335-1)!
• The cable must have a diameter of 4 mm for the screwed cable gland to
possess the type of protection IP 65.
Take hold of the upper part of the flow sensor, turn it a quarter of a turn anticlockwise and
remove it (bayonet fitting).
Loosen the locking screw of the M12 connection and insert the cable from the alarm device.
Strip 2 cm off the cable.
Strip the ends of the wires and fit connector sleeves.
Connect the flow sensor to the alarm unit in accordance with the following table:
Terminal Contact
1 N/C
2 Source (C)
3 N/O
Technical data (voltage-free reed contact):
Switch power
Switch voltage
Switch current
Provide approx. 5 cm of spare cable inside the flow sensor and tighten the attachment screw
of the M12 connection.
Push the upper part of the sensor right into the housing and carefully turn it clockwise until it
locks into place, taking care that the notches on the bayonet fitting do not break off.
6

Commissioning the DGMa

6.1

Setting the Flow

Use the ball valve to change the flow. Read the flow off the flow module (upper edge of the float).
6.2

Setting the Switch Point of the Flow Sensor

IMPORTANT
• It is possible for water to escape and spray arround.
• Take appropriate measures, if necessary.
A drop in the flow should cause the contact to open (the flow sensor is connected via an
N/C contact (T1 – T2; (NC – C)):
Use the ball valve to set the flow at 50 l/h
Hold the flow sensor tightly and loosen the clamping nipple slightly
Use the flow sensor to push the float down to 40 l/h – the connected alarm should be
deactivated automatically
Hold the flow sensor tightly and tighten the clamping nipple
To test it, decrease the flow – this should activate the alarm
Check that the threaded connector is sealed properly.
max. 3 W
max. 42 V (protective extra-low voltage (SELV))
max. 0.25 A
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