Coster IET 7143 C1 Quick start guide

1
We reserve the right to make changes without notice
H 355 - IET 7143-7183 C1 Eng. 18.01.10 AM Rev. 06
COSTER
H 355
18.01.10 AM
Rev. 06
1. APPLICATION
The “universal” meter IET 7183 (or IET 7143), in conjunction with a volumetric meter, calculates the thermal and/or
refrigeration energy used in heating and/or air conditioning zones.
By means of C-Bus communication the meter can be connected locally or via Telemanagement to a PC for readouts
locally or at a remote site.
As of firmware version 13, transmission speed is programmable from 1200 to 9600 baud.
2. PRINCIPAL FUNCTIONS
– METERING THERMAL & REFRIGERATION ENERGY: the volumetric meter sends the pulses from measuring the
volume of hot and/or cold water for metering as calories and/or frigories; while the flow and return sensors send the
temperature values; the unit processes this data and calculates continuously the related energy, integrates it and
records it.
– FORWARDING ENERGY & VOLUME PULSES: the unit is provided with two optoisolated outputs; each genera-
tes a pulse each time a certain quantity of energy is metered and of water flowing past.
The measurement unit for volume and energy depend on the nominal flow of the volumetric meter.
– POWER SUPPLY: one of the two models is usually powered by 230 V~ and the other by 24 V~; a battery is
incorporated which guarantees operation in the event of a temporary power failure. The battery will ensure opera-
tion for about three years of power failure.
– DATA RECORDING: all the basic data is recorded in two copies physically separated; a security system permits
protecting this data from any critical events and restoring the original data.
– DATA RECORDING (LOGGER): all consumption data is recorded every week for 52 weeks; this represents a
complete annual season of heating and air conditioning. Moreover, each week is recorded the peak (weekly) of
the flow and of the power; these figures are processed at a programmable time interval
– ALARM SYSTEM: the unit processes10 different types of alarm with a local or remote output; the alarms are
recorded in the DATA LOGGER by type and time of event.
– ADDITIONAL PROCESSING: the unit continuously processes the flow of the fluid vector and the instantaneous
power of the system. Moreover, it provides all the data of interest to a normal user and configuration data for the
supervising engineer.
– REMOTE CONTROL: the unit is provided with a Remote Control output which can be enabled via Telemanage-
ment; its most common use is switching off the heating (e.g. closure of zone valve) for the user in arrears.
3. TEMPERATURE SENSORS
IET 7183 and IET 7143 are provided with two Pt 1000 temperature sensors calibrated in pairs, each with an electric
cable of about 3 metres.
Each of the two sensors is inserted in a pocket the length of which depends on the application.
IET 7183 C1 (230 V ~) Eng.
IET 7143 C1 (24 V ~) Eng.
THERMAL & REFRIGERATION ENERGY METER WITH
ENERGY & VOLUME PULSE TRANSMITTER
Conforms to UNI EN 1434 standard
Conforms to Directive MID 2004/22/EC
• Automatic energy metering :
– consumption of thermal (heating) and/or refrigeration (conditioning) energy;
• Forwarding of energy and volume pulses:
–two optoisolated outputs for each energy & volume metering unit
• Volumetric meter :
– mechanical or electronic meters (e.g. ultrasound, see section 10.2)
• Communication system already incorporated:
– C-Bus for Telemanagement via modem or local management via PC
speed programmable from 1200 to 9600 baud
• 1 remote control output
– enabling remote control via Telemanagement
• Installation on pipework or on DIN rail
• Power supply : IET 7183 = 230 V ~ ; IET 7143 = 24 V ~
– battery incorporated for power in event of mains failure
QUICK REFERENCE :
– INSTALLATION & WIRING DIAGRAM: SECTIONS 8, 9 & 10
– TESTING WIRING: SECTION 21
– ACCURACY RATING OF THE SYSTEM: SECTION 14
– SIMPLIFIED READ out OF THE UNIT: SECTION 16
– COMPLETE READOUT: SECTION 18
– SETTING FISCAL PARAMETERS: SECTION 20
BUS
C

2We reserve the right to make changes without notice
H 355 - IET 7143 - 7183 C1 Eng. 18.01.10 AM Rev. 06 COSTER
INTEGRATOR
ENERGY
7183
COSTER
COO °cHEAT °C
F
IET
S
21R
B
U
C-BUS
1200...9600
bps
106
119
35
50.5 5
45
4. GENERAL TECHNICAL DATA
4.1 Calculation units
Conforms ro Directive MID 2004/22/EC
Power supply :
IET 7143 24 V~; + 10% – 15%
IET 7183 230 V~; + 10% – 15%
Consumption 0.35 VA
Backup lithium battery 3.6 V - 2Ah
Autonomy without mains power 3 - 5 years
Enclosure DIN 6E module
Enclosure protection IP 54
Base + cover ABS
Display LCD
Volumetric meters for heating /air conditioning :
see sections 10.2 and 10.3 on page 5
Maximum measurable power 30,000 Kw
Maximum measurable flow 2,000 m3/h
Temperature range 0...170 °C
Temperature differential range 3...150 °C
Energy & volume outputs see section 10.5 and 10.6
Accuracy class = 2 see section 14 on page 7
Output alarm forwarding 24 V - 50 mA max
Ambient humidity Class F DIN 40040
Vibration test with 2g (DIN 40 046)
Accuracy class 2 (see section 14)
Ambience Class A
Ambient temperature :
- operation 5 to 55 °C
- storage – 25 to + 60 °C
Construction standard Italian Electr. Committee (CEI)
Dimensions 106 x 119 x 56 mm
Weight 0.4 kg
4.2 Sensors
Conforms ro Directive MID 2004/22/EC
Precision see section 14 page 7
Type Pt 1000
Measurement temperature range 0...150 °C
Difference temperature return/flow range 3...150 °C
Cable section 2 x 0.5 mm2
Standard cable length 3 m
Special length cable 10 m
Essential accessories:
Pair of pockets for sensors (brass or stainless steel) GIS ...
- thread 1/2"
- depth 2 measurements: 25 and 45 mm
Standards :
Specific standard for the meter UNI EN 1434
Immunity from electric disturbances & RF CEI EN 61000
• Telemanagement
Speed C-Bus chosen from 1200, 2400, 4800, 9600 bauds
5. OVERALL DIMENSIONS & FACIA
6. INSTALLATION OF METER ON PIPE OR WALL
1
2
3
3
4
5
6
6
1 –Display: on display are included arrows for indicating the data shown
at a particular moment.
2 – Key for advancing pages.
3 – Key for diverting from menu and increasing adjustable parameters,
4 – Indicators of the pages displayed at that moment
1 – Body and protective cover
2 – Base with transformer, components & terminal blocks
3 – Screws for securing base and cover
4 – DIN rail securing elements
5 – DIN rail release lever
6 – Perforated “Ears” for seals
1 – Universal fixing plate
2 – Bands to pass through the openings in the plate and secure around
the pipe
3 – Meter base, shown without the printed circuit, to fix on the plate.
4 – Screw for securing base to fixing plate; this screw is housed near to
the hole (5)
2
1
3
5
4
1
6
3
5
4
5 – Hole for passing through the screw ( to be pierced by a screwdriver).
The hole is closed by a thin layer of plastic to ensure IP 54 protection.
Tighten up the screw.
6 – Screws for securing the plate to the wall
2
1
3
4

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We reserve the right to make changes without notice
H 355 - IET 7143-7183 C1 Eng. 18.01.10 AM Rev. 06
COSTER
A BRASS
25 GIS 025
45 GIS 045
7. TEMPERATURE SENSORS & RELATED POCKETS
7.1 Important instructions for the correct installation of the sensors
– The sensors are inserted in the pockets and pressed as far as they will go, in order to be sure that they detect
the fluid temperature; if the sensors are only partially inserted in the pockets they may measure the temperature
incorrectly. The sensitive part of the sensor is the extremity of the small metal cylinder.
– The sensor can be sealed in order to prevent tampering; tighten by hand the screw of the seal and pass the seal
wire through the hole and the groove of the hexagon.
7.2 Pockets (not included with the meters)
The pockets are available in various models, sizes and materials, according to type of application.
STANDARD BRASS POCKETS (supplied in pairs)
These pockets are in packages of two.
Other pockets are available with different
depths, for any pipe diameter.
See the sensors & pockets section of the catalogue.
Misc. A B Model
1/2" 45 56 ART 015
3/4" 45 56 ART 020
1" 42 62 ART 025
Each item represents a pair of pockets & T sleeves
for the flow & return sensors
1
2
3
1 – Grommet for passage of sensor cable
2 – Knurled and perforated screw for securing sensor cable (tighten only by hand)
3 – The seal cable should be threaded through the hole in the knurled screw and pulled along the
groove; it should then be sealed.
1 – Knurled and perforated screw for securing sensor cable (tighten only by hand).
2 – The seal cable should be threaded through the hole in the knurled screw and pulled along the
groove; it should then be sealed.
1
2
B
A
POCKETS ON BRASS “T” SLEEVE (supplied in pairs)



4We reserve the right to make changes without notice
H 355 - IET 7143 - 7183 C1 Eng. 18.01.10 AM Rev. 06 COSTER
8. SITING & INSTALLATION
The unit must be installed in a dry location that respects the permitted ambient conditions given under 4. TECHNI-
CAL DATA. ”. It must be connected to an electrical installation constructed according to standard IEC 79-14 (CEI
EN 60079-14) and sited in a non-dangerous area meeting standard IEC 79-10 (CEI EN 60079-14): that is, an area
in which there is no potentially explosive quantity of gas requiring special measures for the construction, installation
and use of electrical plant.
It can be mounted on a DIN rail and housed in a standard DIN enclosure or connected directly to a pipe using the
accessories supplied: the pipe must be insulated or must not reach temperatures above 40°C, nor below ambient
temperature (cooling), to prevent condensation.
9. ELECTRICAL CONNECTIONS
Proceed as follows :
• Separate the base from the unit
• Mount the base on the DIN rail or other suitable place and check that the securing elements (5.4) anchor it securely
• Make the electrical connections according to the diagram and in respect of the safety standards in force using the
following cables: :
– 0.75 mm2 for power supply; the total diameter of the cable must be less than 7 mm. in order for it to pass
through the rubber grommet and ensure a good seal
– 0.35 mm2 for the sensors or for any other input or output; the total diameter of the cable must be less than 5 mm.
The sensors are already supplied with a cable of this type 3 metres long; for greater lengths see section 10.1.
• If the power supply is 24 V~ (IET 7143) WARNING: the 24V~ supply can present problems if 230/24 volt tran-
sformers of poor quality are used. The transformer has to ensure that the voltage does not rise above 24
volts + 10% even when used without a load: the consumption by the electronic unit is so small that it does
not create any operational problem for the transformer.
• Programming of jumpers P1, P2, P3, P4 and Z6 on the terminal board.
These must be configured at the time of installation and wiring of the device.
There are five jumpers: P1, P2, P3 and Z6.
– JUMPER P1 : serves to connect the battery to the circuit; during storage the battery is disconnected by means of
this jumper in order to avoid discharging it should it not be used for a long tim.
– JUMPER P2 : serves for programming output G (power supply ultrasound sensors or similar) between 3.6 and 5
volts. See wiring diagram section 10, output G.
– JUMPER P3 : serves for programming the pulse output of the volume that can be either equal to the pulse output
of the volumetric meter or with the metering unit already processed by IET 71..
– JUMPER P4: serves to program the type of volumetric meter for heating/cooling.
– JUMPER Z6: permits changing to “high resolution” mode. The total meter readings (MWh alternating with TOT
and m3 alternating with TOT), not adjusted, are displayed using a multiplication factor of 1000.
• Switch on the power and check its presence at terminals L and N.
• Switch off power, replace cover on the base/terminal block and switch on power again.
• After these operations the meter will be in operation, even without external power, since it is battery-powered.
WARNING: The display, even when the unit is powered, may not light up immediately. If this should happen, press key
or wait for a maximum of one minute when the display will automatically light up.
The next operations are :
–Setting the time and date on the clock (section 18.3 – M8.2 and subsequent displays on page15): it is useful, at
this stage, to start the clock, since after the body and protective cover has been detached from the base for about
24 hours the clock battery becomes exhausted. When the body and protective cover is inserted on the base the
clock is powered by the battery which keeps it functioning for years even without mains power.
– If required, setting fiscal parameters and alarms: if the unit has not been calibrated before installation this must
be done as described in section 18 on page 14.
• Having concluded all the checks, secure the cover with the four screws provided (figure 5.3) and apply the seals
to the “ears” (figure 5.6)
– JUMPER P1
= Battery disconnected (factory setting)
= Battery connected (operating condition)
– JUMPER P2
= Output G at 3.6 Volt (factory setting)
= Output G at 5 Volt
– JUMPER P3
= Output volume pulses processed as standard measu-
rement units by IET 71… (INDIRECT mode)
= Output volume pulses equal to those emitted by volu-
metric meter (factory setting: DIRECT mode)
– JUMPER P4 (from C2 version)
= litres/pulse (factory setting)
= pulses/litre
– JUMPER Z6 (from C2 version)
= Normal operating mode (factory setting)
= High resolution mode
N.B. only for tests during first field test
BATTERY +P1
P2 P4P3
TRANSFORMER
TERMINAL BLOCK
POWER
SUPPLY
Z6
OFF
I / L
3,6 V
DIR

5
We reserve the right to make changes without notice
H 355 - IET 7143-7183 C1 Eng. 18.01.10 AM Rev. 06
COSTER
L - N = Live and neutral of power supply: 230 or 24 V 50Hz according to
model.
A = Output which closes in presence of any type of alarm
This same output can also be used for remote control
(from update C1)
The output is of the Open Collector (optoisolated) type
A+ = positive of Open Collector
A0 = negative of Open Collector
CE = Output for energy pulses.
This output is of Open Collector (optoisolated) type
E+ =positive of Open Collector
E0 = negative of Open Collector
CV = Output for volume pulses.
This output is of Open Collector (optoisolated) type
V+ = positive of Open Collector
V0 = negative of Open Collector
BW = Pulse transmitter volumetric meter (mechanical, magnetic or similar)
fluid vector heating/cooling
U = as alternative to BW = connection with ultrasound volumetric meter
with “BURST” type output or frequency modulation
G = power for ultrasound sensors or similar: choice of 3.6 V or 5
V (see jumper P2, section 9)
BW = Input pulses (“BURST” or frequency modulation)
M = 0 V
BF = Flow temperature sensor, labelled _a (Pt 1000)
BR = Return temperature sensor, labelled _b (Pt 1000)
C-Bus = Local or remote communication bus (speed from 1200 to 9600 bps)
10. WIRING DIAGRAM
10.1 Connection of the temperature sensors
The sensors are supplied with 3-metre cables (SPT 031 sensor).
The sensor cables, for certification reasons, MUST NOT BE SHORTENED NOR LENGTHENED.You are stron-
gly recommended to install the calculation unit, securing it to the wall or on the pipework, so as to avoid joints for
extensions in the sensor cables.
Should cable length be insufficient for installation reasons, order SPT 010 sensors, supplied with 10-metre cables.
10.2 Volumetric meters with pulse transmitter “litres per pulse” (mechanical, magnetic or similar)
This type of meter has an output of pulses, each of which represents a certain number of litres: litres per pulse; for
example, mechanical meters (pulse transmitted by means of voltage-free switch) and magnetic meters (transmit
pulses to an open collector or similar).
Minimum time switch of pulse transmitter closed: 200 mseconds.
Minimum time switch of pulse transmitter open: 800 mseconds.
Maximum speed of metering: 1 pulse per second.
Normally the meter has a two-wire cable three metres long.
For the electrical connections follow these instructions:
– up to 3 metres it can be connected directly to the terminal block.
– over 3 meters, extend it with screened cable (2 wires + screen) up to a maximum of 30 meters, connecting
the screen only to point M of the terminal block.
– in the event of doubt or where there are existing installations which fall outside this advice, consult COSTER tech-
nical staff to find solutions that do not require the re-design of the wiring.
If possible, avoid laying the meter cabling alongside power cables (230 V); use different channels.
10.3 Volumetric meter with pulse transmitter “pulses per litre” (BURST for volumetric ultrasound)
This type of meter has a pulse output; for each litre flowing past a certain number of pulses is emitted:
pulses per litre; for example volumetric ultrasound meters.
– meter with output of “pulses per litre” type (COSTER ultrasound KSG…/KSF…).
WARNING: Configure;
– JUMPER P4 in “pulses per litre” position
– SWITCH No. 7 in “pulses per litre” position
This meter already has an output which can be correctly coupled with the input and so the 3-metre cable
can be extended to 30 metres without causing problems; for greater lengths consult COSTER technical staff.
However, it is always advisable not to run the cable near to power cables (230 V).
– ultrasound meters of other manufacturers: generally IET 71.. is compatible with all the volumetric meters in
common use. To be sure about compatibility consult COSTER technical staff.
The electrical features of the IET 71.. input are:
Minimum time of pulse : 1 msecond.
Minimum time between 2 pulses: 18 mseconds with high impedance meter output (e.g. Open Collector)
5 mseconds with low impedance meter output
If the volumetric meter has these features it is perfectly compatible.
10.4 Output alarm and/or Remote Control (A)
Output A is optoisolated with Open Collector: maximum 24V- and maximum 50 mA.
This output is compatible with all the alarm inputs of COSTER electronic devices.
10.5 Local or remote (Telemanagement) readout of the unit from PC
The numbers above the symbols are those required by international
standards
WARNING: The 24 V power supply can present problems if 230/24 V transformers of low-quality
are used.The transformer must guarantee that the voltage does not rise above 24 V + 10% even when used without load:
the consumption by the electronic unit is so low that it hardly loads the transformer.
FOR WIRING THE SENSORS AND VOLUMETRIC METERS READ CAREFULLY THE NEXT THREE SECTIONS
BR
T
BF
L CEN A+ A0
T
CE
IET 7183 = 230 V ~
IET 7143 = 24 V ~
IET 7183 = 230 V ~
IET 7143 = 24 V ~
L N
0C C
C-Bus
0
M CV M G BW M BF M BR M
CV
BW
28 1627 50 51 60 61 17 18 19 9 10 11 5 6 7 8
A
U(_a) (_b)

6We reserve the right to make changes without notice
H 355 - IET 7143 - 7183 C1 Eng. 18.01.10 AM Rev. 06 COSTER
11. IMMUNITY FROM ELECTRICAL DISTURBANCES & RADIO SIGNALS
Since the meter incorporates an historic memory of consumption from the moment of its installation, it is designed
to provide the maximum security for the data stored in this memory, even in the presence of electrical and radio
disturbances.
On the basis of the above tests the meter has been assigned to Class A – the highest recognized by the standards.
Class A does not specify particular measures when laying the cables necessary for the installation of the unit; howe-
ver, particular care is recommended to ensure a high degree of safety.
Data protection: in section 16.8 on page 10 is described the procedure for protecting the data.
Even if the unit should suffer irreversible damage, malicious or not, the data recorded always remains in memory; this
data can be recovered by COSTER using a special procedure in its own workshops.
12. LABELING OF METERS
The meters are labelled according to the requirements of MID 2004/22/EC.
Since the unit is universal, it can be connected to a volumetric meter of any type and size and calibrated accordin-
gly.
These data appear on the display, once the coupling with the volumetric meter has been made.
The data on the display are reliable, since the coupling is memorised in the unit and is protected by a seal.
Note : the pulses recorded are forwarded after a maximum time of 15 minutes
10.7 Transmission of volume pulses processed by IET 71.. (INDIRECT mode)
The CV output transmits a pulse every 1 or 10 or 100 or 1000 litres, according to the weight of the output of the
volumetric meter and to the type of output(litres/pulse of pulses/litres).
The pulses transmitted have a duration of 100 ms; if more than one pulse is to be transmitted the time
interval between one pulse and the next is 2 seconds.
Example 1: Woltmann meter of 60m3/h,
with pulse transmitter of 1000 litres/pulse.
Each pulse transmitted by IET 71.. = 1000 litres.
Example 2: ultrasound transmitter of 6 m3/h, with
pulse transmitter of 10 pulses/litre.
Each pulse transmitted by IET 71..= 10 litres
Meter output Meter output Energy per pulse
litres per pulse (l/p) pulse per litre (p/l) transmitted
Up to 1 litres/pulse 100 pulses/litre & over 1 litre
over 1 & up to 10 below 100 & up to 10 10 litres
over 10 & up to 100 below 10 & up to 5 100 litres
over 100 below 5 1000 litres
This transmission of pulses is of the indirect type since it is not a copy of what the volumetric meters transmit, but
is already the processed volume which, by means of an external meter, can be measured in a second way for sa-
fety.
Note: the pulses recorded are transmitted after a maximum interval of 15 minutes.
Application example: connection of the signal to an external processing system for its viewing and/or control (su-
pervision system, PLC etc.)
10.8 Transmitting volume pulses in DIRECT mode
The CV output transmits exactly the same pulses received from the volumetric meter, the same number and form
and without any processing by IET 71.., if not with the addition of special insulation so as to have longer connecting
wires without problems. This output is used for calculating the instantaneous flow very quickly and accurately, without
the delays inevitably introduced by the IET.. microprocessor.
Example of application: automatic limitation of the primary flow in District Heating sub-stations.
If COSTER XTT 618 or XTT 608 controllers are used, please refer to the application examples
provided in technical factsheets B 283, page 3 (XTT 618) and B 284, page 4 (XTT 608).
Meter output Meter output Energy per pulse
litres per pulse (l/p) pulses per litre (p/l) transmitted
Up to 10 litres/pulse 25 pulses/litre & over 1 KW hour
over 10 & up to 100 below 25 up to 5 10 KW hour
over 100 below 5 100 KW hour
Example 1: Woltmann meter of 60 m3/h,
with pulse transmitter1000 litres/pulse = 100 KW
hours each pulse transmitted by IET 71…
Example 2: ultrasound transmitter of 6 m3/h, with
pulse transmitter10 pulses/litre = 10 KW hours
each pulse transmitted by IET 71…
The unit is provided with a standard C-Bus output for local or remote readout of all the data and
for certain non-fiscal settings.
For remote readout C-Bus is used according to the standards already described in the general data sheet on C-
Bus.
For local readout it is necessary to use a PC connected to C-Bus via ACB 232 convertor cable or connected to the
appropriate connector of other C-Bus amplifiers (e.g. PCB 432), using a normal cable for RS232.
10.6 Transmitting energy pulses
The CE output transmits a pulse every 1 KW hour or 10 KW hour or 100 KW hour, according to the output weight of
the volumetric meter and to the type of output (litres/pulse or pulses/litre).
The transmitted pulses have a duration of 100 ms; if more than one pulse is to be transmitted the time
interval between one pulse and the next is 2 seconds.

7
We reserve the right to make changes without notice
H 355 - IET 7143-7183 C1 Eng. 18.01.10 AM Rev. 06
COSTER
13. ACCURACY OF THE CALCULATION UNIT
The maximum error of the calculation unit is less than that required by EN 1434 (2007) Directive.
This maximum error is shown in the following formula:
Ec% = ± (0.5 + ∆T min
∆T) where : ∆T min =difference flow/return minimum (3°C)
∆T = actual difference between flow and return
Examples : with actual ∆T reale di 3 °C the maximum error accepted by the regulations becomes ± 1.5%
with actual ∆T of 10°C the maximum error accepted by the regulations becomes ± 0.8%
with greater actual ∆Ts the error is reduced.
14. ACCURACY OF THE PAIR OF TEMPERATURE SENSORS & OF THE SYSTEM
The maximum error of the pair of sensors is lower than that prescribed by the EN 1434 (2007) Directive.
The maximum error on the difference between the flow and return temperatures is given by the following formula:
Et% = ± (0.5 + 3 ∆T min
∆T) where : ∆T min = difference flow/return minimum (3 °C)
∆T = actual difference between flow and return
Examples : with actual ∆T tof 3°C the maximum error accepted by the regulations becomes ± 3.5%
with actual ∆T of 10°C the maximum error accepted by the regulations becomes ± 1.4%
with greater actual ∆T the error is reduced.
THE TOTAL ERROR PERMITTED BY THE REGULATIONS FOR THE CALCULATION UNIT INCLUDING SEN-
SORS, IS THE SUM OF THE TWO PARTIAL ERRORS.
Examples : with actual ∆T of 3°C the maximum error accepted by the regulations becomes ± 5%
with actual ∆T the maximum error accepted by the regulations becomes ± 2.2%
with greater actual ∆T the error is reduced.

8We reserve the right to make changes without notice
H 355 - IET 7143 - 7183 C1 Eng. 18.01.10 AM Rev. 06 COSTER
0 0 1 2 3 . 4 5 6 M W h v v
M.1
0 1 1 . 0 3 C – c v
M.5
0 4 0 . 0 2 ° c v
M.4
0 0 1 2 3 . 4 5 6 M W h v v
M.2
0 5 1 . 0 5 ° C v
M.3
– – – – A L A 1
v
M.6
– – – – – – A L A 2
v
M.7
– – – A D D v
M.8
1 2 3 4 A L A 1
v LOGG
1 2 3 4 5 6 A L A 2
v LOGG
0 0 1 A D D v
0 0 4 5 6 . 7 8 9 m 3 v v
0 0 4 5 6 . 7 8 9 m 3 v v
0 0 0 0 1 . 2 3 4 m 3 / h v v
0 0 0 0 1 . 2 3 4 m 3 / h v v
0 0 0 0 2 . 3 4 5 K W v v
0 0 0 0 2 5 . 0 0 L / P v v
F L O R E T v v
0 0 0 0 2 . 3 4 5 m 3 / h v v F M A X
0 0 3 6 6 . 7 8 9 M W h v v T O T
0 0 5 6 6 . 7 8 9 m 3 v v T O T
0 0 0 0 2 . 3 4 5 K W v v
0 0 0 0 2 5 . 0 0 L / P v v
F L O R E T v v
0 0 0 0 2 . 3 4 5 m 3 / h v v F M A X
0 0 3 6 6 . 7 8 9 M W h v v T O T
0 0 5 6 6 . 7 8 9 m 3 v v T O T
RETURN TO HEAD
OF COLUMN
RETURN TO HEAD
OF COLUMN
1 8 - 2 3 - 1 5 H R S
v
0 0 0 0 0 3 6 9 H R S
v
0 0 0 4 2 6 0 0 H R S
v A L A
I E T 7 1 C 1 - V. X X v
1 1 9 - 0 7 - 0 4 D A T E v
SEGMENTS ALL LIT
RETURN TO HEAD
OF COLUMN
RETURN TO HEAD
OF COLUMN
HEAT
FS
21R
B U
COOL HEAT
FS
21R
B U
COOL HEAT
FS
21R
B U
COOL HEAT
FS
21R
B U
COOL HEAT
FS
21R
B U
COOL HEAT
FS
21R
B U
COOL HEAT
FS
21R
B U
COOL HEAT
FS
21R
B U
COOL
15. STRUCTURE OF PAGES ON THE DISPLAY (EXCLUDING FISCAL SETTING)
To scroll the menus(and the pages of the sub-menus)use the key
To enter sub-menus use the key
RETURN TO HEAD
OF COLUMN
1 2 0 0 - - - - B A U D v

9
We reserve the right to make changes without notice
H 355 - IET 7143-7183 C1 Eng. 18.01.10 AM Rev. 06
COSTER
16. MINIMUM INDISPENSABLE SETTING OPERATIONS; SIMPLIFIED READOUT OF UNIT
In this section are described the minimum indispensable settings and other operations essential for correct operation
of the unit and the simplified readout..
16.1 Minimum indispensable settings & other operations
The settings & other operations described below are the minimum required for putting IET 71.. in working
condition.
– Connecting the battery: move jumper P1 to the right (see section 9. ELECTRICAL CONNECTIONS).
– Correct setting of the value for litres per pulse or pulses per litre of the volumetric meter used
(heating/cooling); see pages M.1.1 TF, in sections 20.5 and 18.6.
If the above data are not correctly entered the meter will function erroneously.
– Setting time of day: page M.8.2 of section 17.3.
– Setting of C-Bus communication speed (from 1200 to 9600 baud), see page M.8.2, section 18.3
– Setting C-Bus address, if local or remote management used: page M.10.1 of section 17.3.
– Complete readout of the meter to check the above actions.
16.2 Simplified readout of the unit
In this section is described the simplified readout of all the metering parameters for normal use.
The decimals in the readouts are after the point: to indicate them more clearly, the standards require that
the decimal figures are clearly distinct from the whole numbers; for this reason the decimal figures are
highlighted by dashes.
The “v” indices are placed automatically above the diagrams which indicate by means of symbols tne significance
First page which always appears on the meter when the power is switched on; when the power is
switched off, the page appears by pressing .
The metering in MWh (aligned if necessary) summed by heating (calories); if the symbol appears alter-
nating with ALA, this means that there is an alarm status the type of which will be explained later.
Press
This is the metering in MWh (aligned if necessary) summed by conditioning (frigories), if programmed,
otherwise this page is skipped.
Press
0 0 1 2 3 4 . 5 6 M W h
v v
M.2
This is the plant flow temperature
Press
The plant return temperature
Press
0 0 1 2 3 4 . 5 6 M W h
v v
M.1
cHEAT C
S
21R
B
U
F
COOL
cHEAT C
S
21R
B
U
F
COOL
0 5 1 . 0 5 ° C
v
M.3
cHEAT C
S
21R
B
U
F
COOL
0 4 0 . 0 2 ° c
v
M.4
cHEAT C
S
21R
B
U
F
COOL

10 We reserve the right to make changes without notice
H 355 - IET 7143 - 7183 C1 Eng. 18.01.10 AM Rev. 06 COSTER
There are four alarms in the first group (ALA 1), arising from external signals of faults: if there are
none, in place of the number will appear –.
Alarm 1 = flow sensor fault or disconnected for at least one minute
Alarm 2 = return sensor fault or disconnected for at least one minute
Alarm 3 = the electronic part of the base detached
Alarm 4 = alarm for absence of flow: this alarm is triggered when the temperature difference is above
a certain threshold (can be set via Telemanagement) and no pulse arrives from the volu-
metric meter for a certain period of time (can be set viaTelemanagement).
Press
The six alarms of the second group (ALA 2), arising from internal operational faults: if there are none,
in place of the number will appear –.
Alarm 1 = corruption of both the memories (irreversible error); the meter must be serviced by CO-
STER.
Alarm 2 = corruption of one of the two memories: this error is automatically corrected and disap-
pears when the memory functions correctly again.
None of the basic meter readings suffer damage.
Alarm 3 = exceeding the threshold of maximum flow by the heating and/or cooling vector fluid for a
certain period of time programmable via Telemanagement.
Alarm 4 = exceeding the number operational hours (programmable via Telemanagement) after
which the standards require the recalibration of the system (usually seven years).
Alarm 5 = alarm clock: this alarm triggers when the clock incorporated in the unit shows incon-
gruent times and dates.
Alarm 6 = alarm for use of incorrect base for the electronic unit: this alarm is triggered when, in
error, the electronic unit is inserted on a base which is not compatible because it is of a
different model.
Press
On this page is shown the Telemanagement address: how to change it will be ADD explained later
– – – = at the factory the address is set at the value – – – : meter not running.
To connect a local PC or for Telemanagement, enter desired address
Press
Returns to the first page (M.1) and the cycle can be repeated
NOTES :
– The alarms GROUP ALA1 and ALA2 appear at the moment at which they are triggered, and disappear when they
cease; the date and time of up to 10 events are recorded..
– The readout of the temperature is updated within a few seconds.
– All the meter readings are updated within a few seconds.
The difference in temperature between flow and return; this difference will be positive with heating
and negative when there is conditioning.
Press
0 1 1 . 0 3 C – c
v
M.5
cHEAT C
S
21R
B
U
F
COOL
1 2 3 4 A L A 1
v
M.6
cHEAT C
S
21R
B
U
F
COOL
1 2 3 4 5 6 A L A 2
v
M.7
cHEAT C
S
21R
B
U
F
COOL
– – – A D D
v
M.8
cHEAT C
S
21R
B
U
F
COOL