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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
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
