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Zenner zelsius C5-IUF Installation And Operating Manual

Made by: Zenner
Type: Installation And Operating Manual
Category: Measuring Instruments
Pages: 12
Size: 1.67 MB

 

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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 m

3

/h

 

EnergieMetering

All that counts.

 


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Installation manual

General information

With zelsius C5 IUF, you have acquired one of the 
most up-to-date, modern heat meters currently 
available on the market. By this version, the wa-
ter 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 navigation make readout 
simple. Can be operated with one single button. It 
is equipped with a long-life battery made for opera-
tion during the initial verification validity period (5 
years) including a reserve of at least another year. 
The meter can be equipped optionally with a bat-
tery lifetime of 11 years.

MID - Initial verification

zelsius

®

 C5-IUF is produced and tested in com-

pliance with the new European Measuring Instru-
ments Directive (MID). According to this directive, 
devices are no longer carrying an initial verifica-
tion stamp, but rather the year of the device’s dec-
laration 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. their first putting into 
use. After this, the national regulations for devices 
subject to compulsory verification apply within the 
EU.  The  duration  of  initial  verification  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-exami-
nation  certificate  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  fulfils  the  national  and  interna-

tional requirements for interference resistance. 
To avoid malfunctions due to other interferences, 
do  not  install  fluorescent  lamps,  switch  cabinets 
or electric devices such as motors or pumps in 
the immediate vicinity of the meter. Cables leaving 
the meter should not be laid parallel to live cables 
(230V) (minimum distance 0.2m)/

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 service 
life. Repairs can only be made by the manufac-
turer. The most up-to-date information about this 
product nd of our installation notice can be found 
at 

www.zenner.com.

2

 


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3

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 

(to avoid cavitation)

bar

1 bar at qp and 80°C medium temperature range

Measurement accuracy class

3 / 2

Nominal pressure/peak pressure

PS/PN

Body with 

threaded connection

16/16

PS/PN

Body with flange/DN

16/16 / 25/25

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*

Nominal flow qp 

(m³/h)

L [mm]

Threaded

 connection

Flange / ND

0,6

110

G3/4B

--

0,6

130

G1B

--

0,6

190

G1B

20

1,5

110

G3/4B

--

1,5

130

G1B

--

1,5

190

G1B

20

2,5

130

G1B

--

2,5

190

G1B

20

* optionally

 


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4

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

°C

 5...55

Storage temperature

°C

-20...+65

Resolution temperature

°C

0,01

Measurement frequency

s

adjustable ex works, beginning with 2s, standard 30s

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)

optional

M-Bus, wM-Bus, RS485, radio

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)

- climatic

Highest permissible ambient temperature 55°C, 

Lowest permissible ambient temperature 5°C, 

Humidity class IP54

- mechanical class

M1

- electro-magnetic class

E1

Dimensioning limits may apply for non-symetrical temperature sensors installation.

* optionally 

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)

Installation

VL

by direct immersion or by immersion sleeves (in case of existing measuring points)

RL

by direct immersion or by immersion sleeves (in case of existing measuring points) 

Integrated in the flow sensor, optionally external

 


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5

Pulse inputs and outputs (optional)

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 

A firmly attached cable is included: external wir-
ing must be done by oneself.

In 1…3

Out 1…3

Eingang

GND

GND

Ausgang

In 1…3

Out 1…3

Eingang

GND

GND

Ausgang

M-Bus (optional)

The optional M-Bus interface complies with the 

norm 1434-3 and operates with 2400 baud fixed. 

The two conductors can be connected in any or-

der to the M-Bus network.

Technical data I/O

Load max.

max. 30V DC/20 mA

I/O 1, 2, 3

Open Drain, n-channel FET

Cable

D = 3,8 mm, 4-core

Pulse-duty factor

1:1 (out); 1:5 (in)

Cable length

1,5 m

Input frequency

max. 1 Hz

colour

connection

signification

white

I/O 1

In-/Output 1

yellow

I/O 2

In-/Output 2

green

I/O 3

In-/Output 3

brown

GND

common ground for 

I/O 1-3

colour

connection

signification

brown

M-Bus 1

M-Bus-Line 1

white

M-Bus 2

M-Bus-Line 2

Technical data M-Bus

Cable length

1,5 m

Cable

D=3,8 mm, 2-core

 


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6

Subject to modifications and errors excepted. 

Any liability for misprints excluded. SAP144505_140225_EN

ZENNER International GmbH & Co. KG

Römerstadt 6
D-66121 Saarbrücken

Telephone  +49 681 99 676-30
Telefax  

+49 681 99 676-3100

E-Mail info@zenner.com
Internet www.zenner.com

H

1max

 = 30mm

L

H

2

 = 25mm

61

53

* see page 3

 


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7

Installation instructions

General Information

Read these instructions carefully right up to the 
end before starting to mount the device! The in-
stallation has to be done by qualified profession-
al personnel. The current laws and regulations 
so as the generally accepted engineering prin-
ciples have to be observed during mounting and 
fitting, especially EN1434 part 1+6, (in Germany 
also  AGFW  directive  FW202,  FW510,  FW218 
and DIN4713 part 4 and the initial verification di-
rective). At devices with M-Bus the general rules 
of technology and the respective regulations for 
electrical installations have to be followed.Make 
sure no heating water escapes during installation 
– 

this can cause burns!

The maximum heating water temperature at the 
flow sensor may not exceed depending on ver-
sion 90°C respectively 130°C. For heating water 
temperature over 90°C or using as a cooling me-
ter, the detachable calculator has to be mounted 
separately with the supplied mounting adapter.

For heating systems with a lack of temperature 
mixing  resp.  with  temperature  stratification  a 
straight  pipeline  of  min.  10xDN  has  to  be  pro-
vided upstream of the installation point.
The flow measuring section is wear-free because 
no moving parts. No inlet or outlet sections are 
necessary. It is important to ensure adequate 

system pressure to avoid cavitation. The review 
of the approval can be identified definitely in the 
display menu (Level 3).
ZENNER recommends to use direct temperature 
measurement and not to use immersion sleeves.

Mounting flow sensor (VMT)

 

Mount ball valves up- and downstream of the 
VMT.

 

Consider the correct installation point (supply 
or return). Normally this ist the return pipe 
(cooler pipe at heating systems). Please note 
the type plate information.

 

Consider the correct flow direction. This is 
indicated by an arrow on the side of the VMT.

 

The flow sensor can be installed in any posi-
tion (also „overhead“).

 

Do not install at highest point of piping to 
avoid air inside the flow sensor.

 

Consider the dimensions of the heat meter.

Notes to installation of the ball valves

 

Mount ball valves up- and downstream of the 
meter.

 

Mount a ball valve with bore M10x1 for direct 
sensors in the supply. This is required for the 
installation of the supply sensor.

 

For symmetrical temperature sensor installa-
tion, mount an identical ball valve in the return. 
This one is used for mounting the return sensor.

 


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8

Mounting heating-/cooling energy meter 

 

Flush the system thoroughly before installing 
the heating-/cooling energy meter.

 

Close valves and release pressure.

 

Dismount the existing flow sensor or meter 
blank.

 

Use only new and flawless sealing material 
and check the seal face for damage.

 

Install the new flow sensor according to the 
correct flow direction and installation position.

 

Turn heat computer to desired reading posi-
tion.

Mounting temperatur sensors

 

The installation of the temperature sensors 
should be preferably symmetrical and direct 
installation.

 

Do not remove the return sensor if already 
mounted on the VMU. This is also valid for 
all the safety seals which are mounted on the 
device as a standard.

 

Sensors are colour-coded (red=supply, 
blue=return).

 

The connecting cables may not be buckled, 
extended or shortened.

 

The seal at the sensor installation point on the 
measuring capsule may not be damaged.

 

Remove locking screw and seal at the ball 
valve completely, if existing.

 

Attach the O-ring to the installation aid (the 
2nd O-ring is only a spare O-ring). Using the 
installation aid, insert the O-ring into the instal-

lation point according to DIN EN 1434 with a 
slight circular motion.

 

Using the other end of the installation aid 
bring the O-ring into the correct position.

 

Insert the 2 halves of the plastic connector 
into the sensor’s three notches (crimps) and 
press them together.

 

Use the installation aid as positioning aid.

 

Insert the temperature sensor into the installa-
tion point and screw it in tightly until the dead 
stop of the seal on the 12-point is reached 
(mounting torque 3-5 Nm).

 

The temperature sensor installation point 
which is optionnally integrated in the flow  
sensor must be secured.

 

Secure the sensor after installation against 
unauthorised removal with appropriate sealing 
(available as a sealing set)!

Installation DF-adapter

 


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9

Putting into use

 

Open valves carefully and chek installation for 
leakage.

 

If the sleep mode of the counter is enabled 
(Display: SLEEP 1), then it must be deacti-
vated by longer pressing the button (>5s).

 

While the system is operating, check whether 
the volume display advances and the temper-
atures displayed correspond with the actual 
temperatures (see the display overview).

 

Wait for the temperature display to be updated 
(1-2 sec).

 

Secure meter with the enclosed sealing mate-
rial against unauthorised removal.

 

Fill in the putting into use report in accordance 
with PTB-Directive TR K9.

Mounting in existing immersion sleeves:

The device C5 can be put into use in connection 
with existing immersion sleeves in accordance 
with the article „Putting into use of MID homolo-
gated temperature sensors” released in the PTB 
notifications 119 (2009), vol. 6.
Based on current information, the regulation 
has a period of validity until 30.10.2016. For the 
identification and marking of the usable existing 
immersion sleeves in connection with the C5 
device, an identification and marking set can be 
delivered from our company.

Consumer

Symmetrical sensor installation for zelsius

®

 C5-IUF with the return sensor 

integrated in the measuring capsule

Supply

Return

Consumer

Symmetrical sensor installation for zelsius

®

 C5-IUF

Supply

Return

Consumer

Symmetrical sensor installation for zelsius

®

 C5-IUF with the return sensor 

integrated in the measuring capsule

Supply

Return

Consumer

Symmetrical sensor installation for zelsius

®

 C5-IUF

Supply

Return

 


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10

Status display / Error codes

The symbols in the table below show the meter’s operational status. The status messages only appear in 
the main display (energy)! The temporary display of the warning triangle can be caused by special operat-
ing states and does not always mean that the device is malfunctioning. However, should the symbol be 
displayed over a longer period of time, you should contact the service company.

Error codes show 

faults detected by 

zelsius

®

 C5-IUF. If 

more than one error 

appears, the sum 

of the error codes 

is displayed: Error 

1005  =  error  1000 

and error 5.

Symbol Status

Event

External voltage

-

Flow existent

-

Attention!

Check system/device for error

Symbol flashing: Data transmission

Symbol constantly displayed: optical interface active

-
-

Emergency operation.

Exchange device

Code

Error

Event

1

Temperature out of measuring range

Check temperature

2

Temperature out of measuring range

Check temperature

3

Short-circuit return sensor

Check temperature

4

Interruption return sensor

Check temperature

5

Short-circuit supply sensor

Check temperature

6

Interruption supply sensor

Check temperature

7

Battery voltage

Exchange device

8

Hardware error

Exchange device

9

Hardware error

Exchange device

10

Error in the measuring system

Exchange device

20

No water in the measuring tube

Check operating pressure

30

Reverse water flow detected

Check installation position

40

Air inside the medium

Vent system

50

Measured value outside overload range

Check dimensioning

100

Hardware error

Exchange device

800

Wireless interface

Exchange device

1000

Status end of the battery

Exchange device resp. battery

2000

Status initial verification expired

Exchange device

 


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Important Note:

The optical interface has to be activated by 
means of the OptoHead through keypress before 
reading out of the de vice.

Devices,  which  are  in  sleep  mode  (Display: 

SLEEP 1

) have to be activated through keypress 

until the energy display shows up.

Depending on you meter’s model its displays 
can differ in number and order from those shown 
here.

Level 1 

Level 2

Heat energy

(Main display)

Ebene 1

Ebene 2

Ebene 3

Ebene 4

Volume

Supply temperature

Return temperature

Temperature difference

Flow rate

Current output

Certification model

3

Pulse value

Input 1

4

Pulse value

Input 2

4

Pulse value

Input 3

4

Sensor type and 

installation point VMT

3

Model number

Serial number

End of the battery

Error status

3

System Date

3

System Time

3

Operation hours

3

Primary M-Bus address

3

Firmware version

3

Function

Output 3

3

Function

Output 2

3

Function

Output 1

3

Date month maximal

flow

2

2

Maximum power, Average value 

since commissioning

Maximum heat energy 

power month

2

2

Maximum cooling energy 

power month

Maximum cooling energy power,

average value since commissioning

2

Heat energy difference from 

last due date to now

2

Cooling energy difference 

from last due date to now

Heat energy difference from 

1. this month to now

2

Maximal Flow

2

2

Cooling energy difference from 

1. this month to now

2

Volume difference from 

1. this month to now

Due date cooling energy

1

Cooling energy

1

3

Opto readout energy

2

S

S

S

S

H

H

H

H

Ebenenwechsel können 

jedem beliebigen Menü-

punkt heraus erfolgen.

  

Hinweis

Je nach Ausführung Ihres Zählers können Anzeigen in Anzahl und 
Reihenfolge von den Abbildungen mehr oder weniger abweichen.

Legende

Taste kurz drücken (S), zum 
Blättern von oben nach un-
ten.  Nach  unterstem  Menü-
punkt  erfolgt  ein  automati-
scher  Sprung  zum  obersten 
Menüpunkt (Schleife).

Taste  etwa  2  sec.  drücken 
(L),  warten  bis  Türsymbol 
(oben rechts in der Anzeige) 
erscheint, dann Taste loslas-
sen.  Erst  dann  wird  Menü 
aktualisiert  bzw.  erfolgt  der 
Sprung zum Untermenü.

Taste halten (H) bis Ebenen-
wechsel  oder  Rück sprung 
aus Untermenüs erfolgt.

H

L

S

1
3

1
3

1
3

3

3

Segment test

1

2

3

4

1

Energy

Last due date

1

Date last due date

Heat energy

(Main display)

Ebene 1

Ebene 2

Ebene 3

Ebene 4

Volume

Supply temperature

Return temperature

Temperature difference

Flow rate

Current output

Certification model

3

Pulse value

Input 1

4

Pulse value

Input 2

4

Pulse value

Input 3

4

Sensor type and 

installation point VMT

3

Model number

Serial number

End of the battery

Error status

3

System Date

3

System Time

3

Operation hours

3

Primary M-Bus address

3

Firmware version

3

Function

Output 3

3

Function

Output 2

3

Function

Output 1

3

Date month maximal

flow

2

2

Maximum power, Average value 

since commissioning

Maximum heat energy 

power month

2

2

Maximum cooling energy 

power month

Maximum cooling energy power,

average value since commissioning

2

Heat energy difference from 

last due date to now

2

Cooling energy difference 

from last due date to now

Heat energy difference from 

1. this month to now

2

Maximal Flow

2

2

Cooling energy difference from 

1. this month to now

2

Volume difference from 

1. this month to now

Due date cooling energy

1

Cooling energy

1

3

Opto readout energy

2

S

S

S

S

H

H

H

H

Ebenenwechsel können 

jedem beliebigen Menü-

punkt heraus erfolgen.

  

Hinweis

Je nach Ausführung Ihres Zählers können Anzeigen in Anzahl und 
Reihenfolge von den Abbildungen mehr oder weniger abweichen.

Legende

Taste kurz drücken (S), zum 
Blättern von oben nach un-
ten.  Nach  unterstem  Menü-
punkt  erfolgt  ein  automati-
scher  Sprung  zum  obersten 
Menüpunkt (Schleife).

Taste  etwa  2  sec.  drücken 
(L),  warten  bis  Türsymbol 
(oben rechts in der Anzeige) 
erscheint, dann Taste loslas-
sen.  Erst  dann  wird  Menü 
aktualisiert  bzw.  erfolgt  der 
Sprung zum Untermenü.

Taste halten (H) bis Ebenen-
wechsel  oder  Rück sprung 
aus Untermenüs erfolgt.

H

L

S

1
3

1
3

1
3

3

3

Segment test

1

2

3

4

1

Energy

Last due date

1

Date last due date

11

 


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12

Legend

Press  the  button  briefly  (S)  to 
switch through the display from 
top to bottom. When you have 
reached the last menu item the 
device automatically jumps back 
to the menu item at the top (loop).

Press the button for about 2 sec-
onds (L), wait for the door symbol 
to  appear  (upper  right  comer  of 
the display) and then release the 
button. The menu is then updated 
resp. Switches to the sub-menu.

Hold down the button (H) until the 
device switches to another level 
or switches back from the sub-
menu.

A  detailed  display  overview  in-
cluding submenus is available 
upon request.

H

L

S

Level 3 

Heat energy

(Main display)

Ebene 1

Ebene 2

Ebene 3

Ebene 4

Volume

Supply temperature

Return temperature

Temperature difference

Flow rate

Current output

Certification model

3

Pulse value

Input 1

4

Pulse value

Input 2

4

Pulse value

Input 3

4

Sensor type and 

installation point VMT

3

Model number

Serial number

End of the battery

Error status

3

System Date

3

System Time

3

Operation hours

3

Primary M-Bus address

3

Firmware version

3

Function

Output 3

3

Function

Output 2

3

Function

Output 1

3

Date month maximal

flow

2

2

Maximum power, Average value 

since commissioning

Maximum heat energy 

power month

2

2

Maximum cooling energy 

power month

Maximum cooling energy power,

average value since commissioning

2

Heat energy difference from 

last due date to now

2

Cooling energy difference 

from last due date to now

Heat energy difference from 

1. this month to now

2

Maximal Flow

2

2

Cooling energy difference from 

1. this month to now

2

Volume difference from 

1. this month to now

Due date cooling energy

1

Cooling energy

1

3

Opto readout energy

2

S

S

S

S

H

H

H

H

Ebenenwechsel können 

jedem beliebigen Menü-

punkt heraus erfolgen.

  

Hinweis

Je nach Ausführung Ihres Zählers können Anzeigen in Anzahl und 
Reihenfolge von den Abbildungen mehr oder weniger abweichen.

Legende

Taste kurz drücken (S), zum 
Blättern von oben nach un-
ten.  Nach  unterstem  Menü-
punkt  erfolgt  ein  automati-
scher  Sprung  zum  obersten 
Menüpunkt (Schleife).

Taste  etwa  2  sec.  drücken 
(L),  warten  bis  Türsymbol 
(oben rechts in der Anzeige) 
erscheint, dann Taste loslas-
sen.  Erst  dann  wird  Menü 
aktualisiert  bzw.  erfolgt  der 
Sprung zum Untermenü.

Taste halten (H) bis Ebenen-
wechsel  oder  Rück sprung 
aus Untermenüs erfolgt.

H

L

S

1
3

1
3

1
3

3

3

Segment test

1

2

3

4

1

Energy

Last due date

1

Date last due date

Heat energy

(Main display)

Ebene 1

Ebene 2

Ebene 3

Ebene 4

Volume

Supply temperature

Return temperature

Temperature difference

Flow rate

Current output

Certification model

3

Pulse value

Input 1

4

Pulse value

Input 2

4

Pulse value

Input 3

4

Sensor type and 

installation point VMT

3

Model number

Serial number

End of the battery

Error status

3

System Date

3

System Time

3

Operation hours

3

Primary M-Bus address

3

Firmware version

3

Function

Output 3

3

Function

Output 2

3

Function

Output 1

3

Date month maximal

flow

2

2

Maximum power, Average value 

since commissioning

Maximum heat energy 

power month

2

2

Maximum cooling energy 

power month

Maximum cooling energy power,

average value since commissioning

2

Heat energy difference from 

last due date to now

2

Cooling energy difference 

from last due date to now

Heat energy difference from 

1. this month to now

2

Maximal Flow

2

2

Cooling energy difference from 

1. this month to now

2

Volume difference from 

1. this month to now

Due date cooling energy

1

Cooling energy

1

3

Opto readout energy

2

S

S

S

S

H

H

H

H

Ebenenwechsel können 

jedem beliebigen Menü-

punkt heraus erfolgen.

  

Hinweis

Je nach Ausführung Ihres Zählers können Anzeigen in Anzahl und 
Reihenfolge von den Abbildungen mehr oder weniger abweichen.

Legende

Taste kurz drücken (S), zum 
Blättern von oben nach un-
ten.  Nach  unterstem  Menü-
punkt  erfolgt  ein  automati-
scher  Sprung  zum  obersten 
Menüpunkt (Schleife).

Taste  etwa  2  sec.  drücken 
(L),  warten  bis  Türsymbol 
(oben rechts in der Anzeige) 
erscheint, dann Taste loslas-
sen.  Erst  dann  wird  Menü 
aktualisiert  bzw.  erfolgt  der 
Sprung zum Untermenü.

Taste halten (H) bis Ebenen-
wechsel  oder  Rück sprung 
aus Untermenüs erfolgt.

H

L

S

1
3

1
3

1
3

3

3

Segment test

1

2

3

4

1

Energy

Last due date

1

Date last due date

Level 4