ZENNER C5 IUF User Manual
EnergieMetering
zelsius® C5-IUF
Installation and
operating manual
Electronic compact heat meter
with ultrasonic flow sensor IUF
optionally M-Bus, wM-Bus and 3 inputs/outputs
optional qp 0,6/1,5/2,5 m3/h
All that counts.
Installation manual
General information
With zelsius C5 IUF, you have acquired one of
the most up-to-date, modern heat meters cur-
rently available on the market. By this version,
the water volume is determined based on the
transit time method. The measurement accuracy
is based on the measurement requirements of
EN 1434 class 2, optionally class 3. Expressive
symbols in the display and easy menu naviga-
tion make readout simple. Can be operated with
one single button. It is equipped with a long-life
battery made for operation during the initial veri-
cation validity period (5 years) including a re-
serve of at least another year. The meter can be
equipped optionally with a battery lifetime of 11
years.
Technical data flow sensor IUF
Nominal flow qp m³/h 0,6 1,5 2,5
Maximum flow qs m³/h 1,2 3 5
Minimum flow qi l / h 6 / 12 / 24 15 / 30 / 60 25 / 50 / 100
Pressure loss at qp bar <= 0,25 bar
Medium temperature range °C 0°C <= Ɵ q <= 90°C / 0°C <= Ɵ q <= 130°C
Minimum pressure
Measurement accuracy class 3 / 2
Nominal pressure/peak pressure PS/PN
IP-Protection class 68
Installation position in any position
Installation return flow optionally forward flow
Cable length up to calculator m 1,2
Installation place temperature sensorsd M10 x 1
Heat carrier (Medium) Water
Nominal diameter DN 15 15 20
Connecting threads*
* optionally
(to avoid cavitation) bar 1 bar at qp and 80°C medium temperature range
Body with
threaded connection
PS/PN Body with flange/DN 16/16 / 25/25
Nominal flow qp
(m³/h)
0,6 110 G¾B --
0,6 130 G1B --
0,6 190 G1B 20
1,5 110 G¾B --
1,5 130 G1B --
1,5 190 G1B 20
2,5 130 G1B --
2,5 190 G1B 20
L [mm]
Threaded
connection
16/16
Flange / ND
2
MID - Initial verification
®
zelsius
C5-IUF is produced and tested in
compliance with the new European Measuring
Instruments Directive (MID). According to this
directive, devices are no longer carrying an ini-
tial verication stamp, but rather the year of the
device’s declaration of conformity (recognizable
on the front of the device, for example: M12).
The MID controls the use of heat meters up to
the moment they are placed on the market resp.
Technical data calculator
Temperature range °C 0...105 / 0...150 *
Temperature difference range K 3...80 / 3...130 *
Display LCD 8-stellig + Sonderzeichen
Ambient temperature during operation
Storage temperature °C -20...+65
Resolution temperature °C 0,01
Measurement frequency s adjustable ex works, beginning with 2s, standard 32s
Unit to read the heat consumption Standard MWh; optionally kWh, GJ
Data storage 1 x daily
Due date values Storage of all monthly values during the entire operation time
Maximum value storage extensive storage of flow rate, performance and other parameters
Interface Standard Optical interface (ZVEI, IrDA), 3 Pulseinputs/-outputs
Supply 3,6 V lithium battery (different capacities)
Battery lifetime Years > 6, opt. > 11 (changeable during the operation time)
Protection class IP54
EMC A
Ambient conditions/climatic
influencing (valid for complete
compact meter)
°C 5...55
optional M-Bus, wM-Bus, RS485, radio
- climatic
- mechanical class M1
- electro-magnetic class E1
Highest permissible ambient temperature 55°C,
Lowest permissible ambient temperature 5°C,
Humidity class IP54
Technical data temperature sensors
Platinum precision resistor Pt 1000
Sensor diameter type mm 45 x 5,0 mm / 45 x 5,2 mm / DS 27,5 more on request
Temperature range °C 0 – 105/0…150
Cable length m 1,5 (opt. 5)
VL by direct immersion or by immersion sleeves (in case of existing measuring points)
Installation
Dimensioning limits may apply for non-symetrical temperature sensors installation.
* optionally
by direct immersion or by immersion sleeves (in case of existing measuring points)
RL
Integrated in the flow sensor, optionally external
3
Pulse inputs and outputs
In 1…3 Out 1…3
Input
GNDGND
Output
DG
(optional)
their rst putting into use. After this, the national
regulations for devices subject to compulsory
verication apply within the EU. The duration of
initial verication validity in Germany remains 5
years for heat meters.
After this period has expired the measuring de-
vice may no longer be used for billing in com-
mercial use. The regulations resp. validity period
may vary in other countries of the EU. ZENNER
International GmbH & Co. KG declares that this
product with the number of the EC type-exam-
ination certicate DE-12-MI004-PTB010 com-
plies with the requirements of the EC directives
2004/22/EC (Measuring instruments directive)
and 89/336/EEC (electro-magnetic compatibility)
Electro-magnetic interference
zelsius® C5-IUF fulls the national and interna-
tional requirements for interference resistance.
To avoid malfunctions due to other interferences,
do not install uorescent lamps, switch cabinets
or electric devices such as motors or pumps in
the immediate vicinity of the meter. Cables leav-
ing the meter should not be laid parallel to live
cables (230V) (minimum distance 0.2m)/
By meters with pulse outputs, the pulse value
can be called up in the display (see the display
overview, Level 4).
The pulse value of the outputs
is permanently set and corresponds with the last
position of the associated display value.
Example:
Output 1 = energy output
Energy display = XXXXX.XXX
Last position = 0.001 MWh = 1 kWh
Output pulse = 1 kWh
In 1…3 Out 1…3
Input
GN
Output
ND
Care instructions
Clean plastic surfaces with a damp cloth only.
Do not use any scouring or aggressive cleaning
agents!
The device is maintenance-free during the ser-
vice life. Repairs can only be made by the manu-
facturer. The most up-to-date information about
this product nd of our installation notice can be
found at www.zenner.com.
4
colour
white I/O 1 In-/Output 1
yellow I/O 2 In-/Output 2
green I/O 3 In-/Output 3
brown GND
connection signification
common ground for
I/O 1-3
Technical data M-Bus
Cable length 1,5 m
Cable D=3,8 mm, 2-core
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