NZR WZ FW 662, Краткое руководство

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NZR – Ihr Partner für Energiemessung
Technische Änderung
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18
guarantees that no foreign particles remain in the pipe.
• In general the pipe should be air free prior to set-up.
• Use only new and appropriate sealing material.
• Water tightness of the different connection should be verified.
• Mechanical flow sensors should not be isolated.
• A lightning protection cannot be ensured; this protection has to be made through the
house installation.
Combined heat meter
Each measurement unit consists of 3 elements:
• Flow sensor
• Integrator
• Temperature sensors (2- or 4-wire) with or without pockets
The pulse values of the integrator and of the flow unit, as well as the resistance value of
the temperature sensors and the integrator must match.
Cable connection
To connect the inputs and outputs the integrator’s upper part must be removed. The
connections are to be made as follows:
Terminal* connection type
1,2 2-wire direct connection, temperature high
1,2 and 5,6 4-wire, temperature high
3,4 2-wire direct connection, temperature low
3,4 and 7,8 4-wire, temperature low
10 (+) pulse inputs flow sensor 440 (white cable)
11 (-) pulse inputs flow sensor 440 (green cable)
9 supply voltage for the flow sensor 440 (brown cable)
50 (+) Pulse input, additional pulse input 1
51 (-) Pulse input, additional pulse input 1
52 (+) Pulse input, additional pulse input 2
53 (-) Pulse input, additional pulse input 2
16 (+) Open collector output 1
17 (-) Open collector output 1 + 2
18 (+) Open collector output 2
24 M-Bus (module optional or equipped at factory)
25 M-Bus (module optional or equipped at factory)
Note: The shielded cables must be grounded with a strain relief!
*see wiring diagram page 25