Xylem sensus PolluFlow Instrucciones De Instalación página 2

PolluFlow
Ultrasonic flow sensor
1. General
This guide is intended for trained specialized personnel. For this reason no basic working
steps are included. Observe the instructions for the use of flow sensors!
The installation must only be carried out by a specialist installation or electrical company.
The personnel must be trained in the installation and handling of electrical equipment and be
cog- nisant of the Low Voltage Directive.
Please note that the connection threads may be sharp-edged. We therefore recommend to
wear protection gloves.
The relevant ESD regulations (electrostatic discharge) must be observed. No responsibility
is accepted for damage (especially to the elec- tronics), resulting from non-observation of
the rules.
The tamper-evident seal on the flow sensor must not be broken! A damaged seal will
result in immediate invalidation of the fac- tory warranty and verification. The cables
supplied with the meter must neither be shortened, extended nor changed in any
other way.
Medium
Water according to CEN Recommendation CEN/TR 16911 (the lifecycle of the meter may be
impaired if not observed).
Temperature range
The temperature range is dependent on the variant and nominal size (see type plate).
Pipeline insulation
In the case of the pipeline insulation, the housing with the elec- tronics must remain free (see
Fig. 3). Otherwise the electronic will run too hot and could be damaged.
Further details about the variants and the applicable standard EN1434-6 can be found in the
data sheet. These must be observed without fail. The data sheet is available under www.
sensus.com
2. Installation
The unit you have purchased contains electronic components which could be destroyed by
electric or magnetic fields. For this reason, neither the device itself nor the incoming and
outgoing cables must be installed in the immediate vicinity of heavy elec- trical loads or their
conduits (e.g. switches, electric motors). The precise separation depends on the magnitude
of the voltage and current in these consumers. In case of doubt consult an expert.
• The flow sensor must be fitted in either a hot or cold pipe of the system. Ensure that the
flow sensor is mounted in the mounting position corresponding to the temperature of the
medium (see "6. Temperature loads" and Fig. 1).
• The flow sensor must be installed so that the flow direction matches the arrow direction
on the sensor.
• Calming sections are not necessary before and after the flow sensor, but calming
sections of 3...10 DN are recommended before the meter.
Installation in both horizontal and vertical pipe sections is possible, however must never be
1
5 ... 130/150 °C 5 ... 130/150 °C
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such that air bubbles can collect in the meter (see Fig. 2). The flow sensor must always be
filled with liquid. Avoid frost at the meter. We recommend installing the flow sensor in a tilted
position (approx. 45°).
It is recommended that shut-off valves are fitted upstream and downstream of the flow sensor
to simplify its demounting. When demounting, an open-ended spanner must be used on the
bottom of the sensor (see Fig. 4).
3. Power supply
3.1 External power supply (e.g. via meter electronics)
• Power supply 3.0 ... 5.5 VDC
• Power consumption < 100 mAh per year
• Pulse current < 10 mA
4. Connection diagram
The function of the individual coloured cables are shown in the following illustrations.
Damages or failure of the meter can occur, if the cables are reversed or wrongly connected.
4.1 Connection to the calculator
Please make sure that the calculator and flow sensor have the same pulse value marking.
With a junction box (order number: 88599001) the pulse cable can be extended up to 10
m by extending the pulse cble with a shielded cable with at least two strands (e.g. I-Y(St)Y
2x2x0,8).
At the PolluTherm calculator terminal 10 and 11 are used for the pulse input. Terminal 9 is
for the power supply. During the connection of the cable the polarity needs to be respected.
4.2 External power supply 3.0 – 5.5 V
+ 3 ... 5 V
Test pulse
Volume pulse
PolluFlow
5. Communication
The flow sensor has two pulse outputs for connection to a heat meter.
• Useful pulse
• Test pulse (high resolution for testing laboratories)
2
5 ... 130/150 °C
The electrical data of the useful pulse are defined as:
Designation
External power supply
Output current
Open Collector (drain)
Cable length to the partial unit energy
meter
Output frequency battery supplied
Output frequency with external power
supply
Useful pulse value
Pulse duration
Potential free contact (optional)
6. Temperature loads
Operating / ambient conditions
• Standard: 5 ... 55 °C; IP 54; 93 % rel. humidity
• Sealed: 5 ... 55 °C; IP 65; 93 % rel. humidity
Media temperatures
Configuration
brown
Heat - externally supplied
yellow
Cold - externally supplied
white
Note that in heat applications, the water temperature must be greater than the ambient
temperature.Once commissioned, avoid frost at the meter.
7. Environnmental conditions
• Electromagnetic enviornmental conditions: Class E2
GND blue
• Mechanical enviornmental conditions: Class M2
Use standard flow sensors:
• at water temperatures permanently above ambient temperatures
Use potted flow sensors:
• For cold applications or T
• If permanent condensation is expected
8. Environmental note
The device shall not be disposed together with the domestic waste.
3
ENGLISH
Value
UC < 30 V
< 20 mA with a residual voltage of < 0.5 V
< 10 m
< 20 Hz
< 150 Hz
1 l and 10 l (dependent on the nominal size)
100 ms ± 10 %;
Pulse duration < Pulse pause
Temperature range
q 0.6 ... 2.5 m³/h: 5 ... 130 °C
p
q 3.5 ... 60 m³/h: 5 ... 150 °C
p
5 ... 120 °C
<
water Tambient
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