Ambiductor HEAT 1 Service manual

Technical data 15
Flow measurement 15
Temperature limits for the liquid 15
Temperature measurement 15
LCD Display 15
Register and data logger 16
Data logger capacity 16
Mechanical data 16
Environmental conditions 16
Pressure drop 16
Accuracy 16
Power supply 17
Internal battery 17
24V module 17
230V unit (external) 17
Remote reading 17
Optical interface 17
M-bus 17
Lora 17
Pulse outputs 17
Pulse inputs 17
Bus communication limitation 17
Marking and sealing 18
Marking 18
The calculator 18
Flow sensors 18
Sealing 18
The seal of the manufacturer 18
Valideringsplombering 18
Monteringsplombering 18
Sealing of calculator 18
Seals on ow sensors 18
Seals on temp sensor PL (dip tube) 18
Seals on temp sensor DS (direct) 18
Dimensions and connections 19
Ambiductor HEAT 1
Compact energy meter with ultrasonic technology
Operating and mounting instructions, owners manual
Applications
Energy measurement of heating and/or cooling in district heating, heat pump or secondary heating.
Table of contents
Flow & Energy Analysis Systems
General information 2
Principle of operation 2
Security 2
Warranty 2
Transport and storage 2
Installation instructions 3
Basic requirements 3
Mounting 3
Mounting of ow sensors 3
Mounting of temperature sensors 3
Mounting of energy calculator 3
Jumpers J setting 4
Checking installation & conguration 4
Sealing after installation 4
Electrical installation 4
Temperature sensor connection 4
Connection of the customer’s temperature sensor 4
Installation of additional communication modules 4
External power supply 4
Operating instructions 5
Screen Features 5
Flow symbols 5
Menu structure 5
User menu in normal mode 5
Menu 5
Test/verication mode 12
Menu 12
Connections in the test / verication mode 13
Exit test / validation mode 13
Verication 13
Overow 13
Info codes / alarms 14
NOTE!
The meter has a limited reading via bus when it is powe-
red by battery. Supplement with external voltage supply
24 / 230V and go to www.ambiductor.se/support for
instructions.

General information
Energy measurement of heat and/or cooling for both the pri-
mary side of district heating and distribution measurement on
the secondary side. Certied according to MID for billing.
It is approved for billing the energy consumption in local or
district heating systems: in residential buildings, oce build-
ings or energy plants and the like.
The meter can be mounted in both the forward and return
pipes (with the correct programming).
The meter comes with paired temperature sensors, pre-
installed at the factory. The user can also use other paired
temperature sensors that meet the requirements of Directive
2004/22/EC on metering instruments on March 31, 2004 and
which have type approval.
The heat meter meet the basic requirements of the Techni-
cal Regulation Measuring Instruments, dated March 30, 2006
(transposition into the NB Directive 2004/22 / EC of 31 March
2004 on measuring instruments):
Appendix I Basic requirements
Appendix MI-004 Thermal heat meter,
HEAT 1 complies with the European standard EN 1434 ”Ther-
mal heat meter” parts 1 + 6.
HEAT 1 complies with the ”C” class environmental protection
requirements according to EN1434-1: 2007
Ambient temperature: from +5° C to 55°C,
Mechanical environmental class: M1,
Electromagnetic environmental class: E2.
NOTE! The meter is a precision instrument and must be
treated as such during installation. Faulty handling can lead
to termination of the warranty. Use brass couplings to connect
the meter.
Principle of operation
The ow measurement is based on the ultrasound measure-
ment method. The ultrasonic signal in the ow directions
moves many times faster than against the ow. The ultrasonic
sensors must perform both transmitter and receiver functions.
From the resulting time dierence, the ow rate is calculated.
The liquid temperature is measured with standard platinum
resistance temperature sensor Pt500. Paired temperature sen-
sors with 2-wire connection for measuring temperatures in the
supply and return pipes are used. Flow and return temperature
sensors can only be replaced in pairs.
Energy Calculation Formulas:
Flow sensor in supply line
Q = V1 * ρ1 * (hT1-hT2)
Flow sensor in the return line
Q = V1 * ρ2 * (hT1-hT2)
Explanation of abbreviations:
Q = thermal energy
V1 = Water volume, m3
ρ1 ρ2 = Water densities, according to supply and return water tempera-
tures Θ1, Θ2
hT1, hT2 - Enthalpies, according to water temperatures Θ1, Θ2
When the cooling function is activated by reversed tempera-
ture dierence, the cooling energy will be registered in the
extra register:
Σ Q = Q1 + Q2
Flow sensor in ow line
When Θ1> Θ2: Q1 = V1 * ρ1 * (hT1-hT2); Q2 = 0
When Θ1 <Θ2: Q2 = V1 * ρ1 * (hT2-hT1); Q1 = 0
Flow sensor in return line
When Θ1> Θ2: Q1 = V1 * ρ2 * (hT1-hT2); Q2 = 0
When Θ1 <Θ2: Q2 = V1 * ρ2 * (hT2-hT1); Q1 = 0
The Integration Agency performs all necessary measuring and
data storage functions.
Ambiductor AB reserves the right to make changes without prior notice. Reprinting or copying this publication without permission is prosecuted.
2
Security
The meter is powered from the battery (3.6 V) or 230V.
During the installation and service of the meter, heat-bearing
uid can ow through the ow sensor with static pressure up
to 1.6 MPa and temperatures up to 180 °C.
Only qualied technical personnel can install and maintain
heat meters. Sta must be familiar with appropriate techni-
cal documents and general safety regulations. It is necessary
to observe the general safety requirements during installation
and maintenance process.
Unit meets safety class II. Protective grounding is not re-
quired, since the casing is made of plastic, and the conductive
parts are not exposed to the surface. Safety guarantees when
installing and servicing the meter are:
• Reliable electrical circuit insulation,
• Hermetic installation of the primary ow and tempera-
ture sensor in the pipeline,
• Reliable attachment of sub-units by heat meters during
installation. Safety requirements for temperature sensors
can be found in the appropriate technical documentation.
Warning! Mounting of the dierent parts of the meter is
only permitted after ensuring the absence of heat-bear-
ing uid in the pipeline.
NOTE! Work with high-voltage circuits may only be done by
authorized personnel.
NOTE! Work with pipe systems may only be done by autho-
rized personnel.
Warranty
The manufacturer guarantee that the equipment meets the
stated technical requirements, provided that transport, storage
and operating conditions are followed.
Transport and storage
Requirements for safe transport and storage regarding tem-
perature, pressure and humidity can be found in Technical data
below.
Packed equipment may be transported in all types of covered
vehicles. Equipment must be anchored in a reliable manner to
avoid shocks etc.
Equipment must be protected against mechanical damage and
shock.
Equipment must be stored dry in heated rooms, where the
ambient temperature is not less than + 5 °C. No aggressive
chemical substances should be stored together due to risk of
corrosion.

Basic requirements
Heat meters are intended for installation in heating or com-
bined heating and cooling systems.
Before installing the device:
1. Make sure all parts listed in the documentation are avail-
able
2. Check for any visible mechanical defects
3. Check if there are valid labels by the manufacturer and
the certication authority
Only qualied personnel may install the equipment, and must
comply with the requirements set forth in this document in the
technical documentation for other system components.
It is prohibited to mount signal cables less than 5 cm from
power cables and cables to other devices.
It is forbidden to change the length of any cable.
Mounting
Mounting of flow sensors
Sizes and ttings of the ow sensor are available in Dimen-
sions and connections.
Up to DN50 there are no requirements for straight pipes for
installation. From DN65, 5xDN applies upstream, 3xDN down-
stream. Avoid ow meter installation close to pumps that can
cause cavitation.
Flow sensors can be mounted both vertically and horizontally
in pipelines. Vertical mounting of the ow sensor is permitted
only if the ow direction in the pipeline is upwards.
The direction of the ow sensor (indicated by the arrow below
the ow sensor) must match the ow direction in the pipe.
The connection gasket must match the pipe diameter. During
installation, the gasket must be precisely centered with the
center of the pipe cross section to avoid sticking gaskets inside
the pipe.
NOTE! Flow sensors must be mounted between shut-o valves
to enable validation/calibration and simplify service.
Mounting of temperature sensors
Temperature sensors are mounted perpendicular to the pipe or
inclined at a 45° angle to the liquid ow direction so that the
sensor element has been inserted close to the center of the
pipe (see Marking and sealing).
In G20 / G¾ ”and G25 / G1 meters, a temperature sensor is
pre-mounted in the ow sensor.
Mounting of energy calculator
Energy calculators can be installed in heated premises, ambi-
ent temperature should be max +55 ° C. It should not be
exposed to direct sunlight.
For liquids outside +10 ... 90 °, the calculator should NOT be
mounted on the ow sensor.
The calculator can easily be mounted on the wall thanks to
DIN rail mounting.
The cable between the calculator and the ow sensor is nor-
mally 1.2m (can be ordered 2.5 and 5.0m).
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Installation instructions
Mounting on standard DIN rail
Mounting on adapter plate according to gure 8 in EN1434-2:
2007 for wall mounting of calculator can be used (if the open-
ing in the wall is too large for the calculator)
Direct mounting on the ultrasonic ow sensor rotatable for ev-
ery 90 ° (only allowed when the temperature of the liquid does
not exceed 90 ° C):
Important: It is forbidden to attach the calculator di-
rectly to a wall with a risk of condensation or tempera-
tures below +5 ° C. Then it is recommended to attach
the calculator with an air gap of at least 5 cm.

Jumpers J setting
The connector J is located in the integrator between the con-
nection terminals of the temperature sensors and the pulses
/ outputs (see below). By using or not using jumpers on this
connector, one can enter / exit test mode and select pulse
inputs or outputs:
Jumpers 1-5
Terminal,
pulse
Communication card
Jumper NOTE con-
nected (open)
Jumper connected
(closed contact)
User mode Verication/test/service
mode
Pulse 1 - OUTPUT active
(terminals 52,53)
Pulse 1 - INPUT active
(terminals 52,53)
Pulse 2 - OUTPUT active
(terminals 50,51)
Pulse 2 - INPUT active
(terminals 50,51)
Checking installation & conguration
After installing the heat meter, ow the uid through the ow
sensor. Measured values should be displayed on the display
if the heat meter (calculator, ow and temperature sensor) is
correctly installed. If the measured values are not displayed
correctly, it is necessary to check the installation.
Sealing after installation
If the meter is to be used for billing, it must be sealed so
that, after installation, it cannot be disassembled, moved or
changed without obvious damage to the meter or seal.
See section “Labeling and sealing” later in this documentation
for more information.
Electrical installation
Calculator’s terminals
Terminal Connection
5 Hot temp sensor (T1)
6 Hot temp sensor (T1)
7 Cold temp sensor (T2)
8 Cold temp sensor (T2)
50 Pulsin/output 2 - GND
51 Pulsin/output 2 (volume in test mode)
52 Pulsin/output 1 - GND
53 Pulsin/output 1 (energy in test mode)
Extra terminals
Terminal Connection
24 M-bus (on M-bus-module)
25 M-bus (on M-bus-module)
20 CL+ (on CL-module)
21 CL- (on CL-module)
Temperature sensor connection
With factory mounted sensors, it is forbidden to split, shorten
or extend the cables. If screw terminals are available on the
calculator, cables, during commissioning, may temporarily be
disconnected from the terminals and reconnected.
Connection of the customer’s tempera-
ture sensor
If sensors other than those supplied with the meter are used,
type-approved and matching pairs of temperature sensors with
two-wire connection must be used.
Before installation, check that the temperature sensors are
paired.
Using a pliers, remove the protective balls from the holes 1
and 2 of the cable entry on the left side of the calculator.
Pull the cable to the ow temperature sensor T1 through the
hole 1 and the cable to the return temperature sensor T2
through the hole 2.
Use two-wire connection for the temperature sensors (see
electrical diagram above).
Installation of additional communica-
tion modules
In the lower right corner of the calculator, communication
modules can be mounted and connected. The module is fas-
tened with two screws.
Using a pliers, remove the protective ball from a non-used
cable entry into the calculator. Pull the cable through the hole
and attach as shown below.
Connect a cable to the module according to the instructions for
each module.
External power supply
24V module and 230V unit are available for external power
supply. See separate documentation.
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4

Operating instructions
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Display management is done through the button on the front
of the calculator.
Screen Features
The meter has an 8-character LCD with symbols for various
parameters, units and operating modes.
Flow symbols
Flow, forward (correct ow direction)
Flow, backwards
(no arrow) No ow registered
Menu structure
User menu in normal mode
Long press of the button (> 3 sec) changes menu.
Short press of the button (<3 sec) changes objects down.
Measurement 1.2, or if there are errors, info code 1.1 is dis-
played when the button is not pressed for 60 seconds.
See table below for explanation. Please note that this is a com-
plete list. Specic meters may not show all of these param-
eters.
INT (integral) BIL (Billing) INF (Information)
Main menu Log screen menu Instant menu
Menu
Note that this is complete menu structure. For a specic meter,
some parts may be disabled.
ID Parameter Value Description
MAIN MENU (INT) - INTEGRAL PARAMETERS:
1.1 Infocode with time stamp
(only shown in case of error)
INT BIL INF
INT BIL INF
INT BIL INF
All three values shown with 1 second interval.
Error in calculator
Error in temp sensor 2
Error in temp sensor 1
Error in ow sensor
Detailed descroption - see Infocodes / alarm
1.2 Energy for heating
INT BIL INF
1.3 Energy for cooling
INT BIL INF
Shown only for combined heating/cooling meters.
1.4 Totalizer energy for tarif 1
INT BIL INF
”Snowake” indicates that the tari is linked to the meter
of cooling energy.
Short press
Long press

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ID Parameter Value Description
1.5 Totalizer energy for tarif 2
INT BIL INF
”Snowake” indicates that the tari is linked to the meter
of cooling energy.
1.6 Volume
INT BIL INF
1.7 Totalizer pulse input 1
INT BIL INF
The additional ow sensor can be connected to a pulse
input 1.
1.8 Totalizer pulse input 2
INT BIL INF
The additional ow sensor can be connected to a pulse
input 2.
1.9 Display test
INT BIL INF
INT BIL INF
Changes every 1 sec.
1.10 Working hours without a en-
ergy calculation error
INT BIL INF
1.11 Customer number
INT BIL INF
Corresponds to a wire transmission via MBus protocol.
1.12 Control number
INT BIL INF
LOGGERMENU (BIL) - BILLING DATA:
2.1 Energy (heating) during a spe-
cic day, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.2 Energy (cooling) during a spe-
cic day, with timestamp
INT BIL INF
INT BIL INF
Only shown in meters with cooling.
Changes every 1 sec.
2.3 Tarif 1 during a specic day,
with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.4 Tarif 2 during a specic day,
with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.

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ID Parameter Value Description
2.5 Volume during a specic day,
with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.6 Pulse input 1 during a specic
day, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.7 Pulse input 2 during a specic
day, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.8 Energy (heating) during a
specic day last month, with
timestamp
INT BIL INF
INT BIL INF
Datum enligt kunds önskemål. Om 31 väljs, visas sista
dagen i månaden.
Registrerad tid: 23:59:59.
Changes every 1 sec.
2.9 Energy (cooling) during a
specic day last month, with
timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.10 Tarif 1 during a specic day last
month, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.11 Tarif 2 during a specic day last
month, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.12 Volume during a specic day
last month, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.13 Pulse input 1 during a specic
day last month, with times-
tamp
INT BIL INF
INT BIL INF
Changes every 1 sec.

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ID Parameter Value Description
2.14 Pulse input 2 during a specic
day last month, with times-
tamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.15 Max power last month, with
timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.16 Min power (or max cooling
power) last month, with times-
tamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.17 Max ow rate last month, with
timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.18 Max temperature in supply last
month, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.19 Max temperature in return last
month, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.20 Max temperature dierence
last month, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.21 Min temperature in supply last
month, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
2.22 Min temperature in return last
month, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.

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ID Parameter Value Description
2.23 Min temperature dierence last
month, with timestamp
INT BIL INF
INT BIL INF
Changes every 1 sec.
MOMENTANMENY (INF) - MOMENTANA VÄRDEN:
3.1 Thermal power
INT BIL INF
3.2 Flow rate
INT BIL INF
3.3 Temperaturs in supply pipe
INT BIL INF
3.4 Temperature in return pipe
INT BIL INF
3.5 Temperature dierence
INT BIL INF
3.6* Next date for battery change
INT BIL INF
3.7* Date
INT BIL INF
3.8* Time
INT BIL INF
3.9* Yearly billing date
INT BIL INF
3.10* Monthly billing date
INT BIL INF

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ID Parameter Value Description
3.11* Tarif 1 Tari 1, at T1-T2 < 10,0°C
INT BIL INF
Or > 10,0°C
INT BIL INF
Or between 10,0...40,0°C
INT BIL INF
INT BIL INF
Or in time interval in hours
(00...24h)
INT BIL INF
Or tarif activated by pulse input:
INT BIL INF
It is possible to choose:
One of the measured parameters, 1st or 2nd pulse input
(if it is congured as an input), one of the temperature or
the temperature dierence.
3.12* Tarif 2 See menu 3.11 but with L2
instead of L1.
See menu 3.11.
3.13* Pulse in/output 1 conguration Input:
INT BIL INF
Input (tari activated):
INT BIL INF
Output: energy, volume
INT BIL INF
Tarif
INT BIL INF
INT BIL INF
Tarif mode:
INT BIL INF
Inputs:
Can be congured only for a quantity of water. Maximum
pulse resolution is displayed 0.00001 m3.
Outputs:
Can be congured for a quantity of water (m3), for hea-
ting (In a shown case) / cooling(additional snowake is
displayed) energy or to one of taris.
3.14* Pulse in/output 2 conguration See menu 3.13 but with ”2”
instead of ”1”.
See menu 3.13.
3.15 Type of heat-conveying liquid
INT BIL INF
Type of heat-conveying liquid:
“---“ (crosses) - water
3.16 Pressure value for energy
calculations
INT BIL INF
”160E4”-corresponds to the pressure 1.6 MPa.
3.17* Customer number
INT BIL INF
Are transferred on telegram Mbus.

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ID Parameter Value Description
3.18 Software version
INT BIL INF
3.19 Serial number
INT BIL INF
3.20* M-bus address
INT BIL INF
3.21 Working hours without a power
calculation error
INT BIL INF
3.22 Battery operation time
INT BIL INF
Note:
Values of the parameters marked with “*” and energy mea-
surement units (kWh, MWh, Gcal or GJ) can be modied by
installing a meter. Replacement is possible via optical interface
and in conjunction with the special conguration programme in
a test mode, when jumper is set.
In the same way it is possible to switch o indication of irrel-
evant parameters.

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Test/verication mode
Menu
The menu structure in the test mode as below.
Long press of the button (> 3 sec) changes menu.
Short press of the button (<3 sec) changes objects down.
ID Parameter Value Description
4.1 High resolution energy
INT BIL INF
INT BIL INF
Updated every 1 sec.
4.2 High- resolution volume
INT BIL INF
INT BIL INF
Updated every 1 sec.
4.3 Number of pulses of pulse
input 1
INT BIL INF
4.4 Number of pulses of pulse
input 2
INT BIL INF
4.5 Temperature of heat con-
veying liquid in ow pipe
INT BIL INF
4.6 Temperature of heat con-
veying liquid in return pipe
INT BIL INF
4.7 Temperature dierence
INT BIL INF
4.8 Activation of ow simula-
tion
INT BIL INF
During test, the value of ow is constantly dis-
played.
After the ending of test, the values of energy and
quantity of a liquid are registered in memory till
the successive test or before following actuating of
the ow simulation.
4.9 High resolution ow rate
INT BIL INF

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Connections in the test / verification
mode
The 2-line 10-pole connection in the calculator, between the
terminals for the temperature sensors and the pulse in/out-
puts, activates the test / validation mode.
See picture.
GND
Tx - for reading in test mode
Energy pulses in test mode
Plint, puls
Kommunikationskort
Volume pulses in test mode
Rx - for reading in test mode
Test mode on/o
In test mode, it is possible to achieve exact results at short
intervals.
To activate test / verication mode, jumper 3 must be mount-
ed (see Setting the Jumpers J).
Jumpers 1-5
Terminal,
pulse
Communication card
Jumper 3 - activation of test mode
Do not turn o the meter in this position.
When jumper 3 is mounted, the unit assumes the test posi-
tion. “TEST” appears on the display, the calculation process
is stopped and all integrated parameter values are stored in
memory. After returning to normal mode, the original values
from before the test are displayed again.
The resolution of the measured values in the test / validation
mode as below.
Energy unit kWh/MWh GJ Gcal
Resolution,
energy
000000,01 Wh 0000000,1 kJ 0000000,1
kcal
Resolution,
volume
00,000001 m3
Pulse values in test / verication mode as below.
Permanent
ow rate qp
Pulse va-
lue volume
(l/p)
Pulse value energy
kWh/
MWh
GJ Gcal
0,6 0,002 0,1 Wh/p 0,5 kJ/p 0,1 kcal/p
1,0 0,002 0,2 Wh/p 1 kJ/p 0,2 kcal/p
1,5 0,004 0,2 Wh/p 1 kJ/p 0,2 kcal/p
2,5 0,005 0,5 Wh/p 2 kJ/p 0,5 kcal/p
3,5 0,02 1 Wh/p 5 kJ/p 1 kcal/p
6,0 0,02 1 Wh/p 5 kJ/p 1 kcal/p
10 0,05 2 Wh/p 10 kJ/p 2 kcal/p
15 0,05 5 Wh/p 20 kJ/p 5 kcal/p
25 0,05 5 Wh/p 20 kJ/p 5 kcal/p
40 0,2 10 Wh/p 50 kJ/p 10 kcal/p
60 0,2 10 Wh/p 50 kJ/p 10 kcal/p
Exit test / validation mode
Remove jumper 3 to exit test mode and return to normal
mode. After leaving the test mode, previously saved values are
displayed.
Verication
Metrological control of the parameters of the heat meters is
performed according to the requirements specied in EN 1434-
5.
Overow
At ow q <1.2 * qs (maximum ow) = linear ow.
At ow q> 1.2 * qs (maximum ow) = constant ow (q = 1.2
* qs is used for energy calculation). Error message 4 “Flow
rate higher than 1.2 * qs” is recorded and alarms all the time
it is active.

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Info codes / alarms
Info codes can consist of up to 4 characters. Each character
has values 0 ... F.
Error in calculator
Error in temp sensor 2
Error in temp sensor 1
Error in ow sensor
Info code Explanation
Status of calculator
▼
INT BIL INF
0 - No error, normal operation
1 - Warning – ending battery life
2 - Temperature dierence is greater than the permitted limits
4 - Temperature dierence is less than the permitted limits
8 - Electronics failure
Status of temp sensor 2 (return)
▼
INT BIL INF
0 - No error, normal operation
4 - Short circuit
8 - Sensor failure (open circuit or short circuit)
Status of temp sensor 1 (supply)
▼
INT BIL INF
0 - No error, normal operation
4 - Short circuit
8 - Sensor failure (open circuit or short circuit)
Status of ow sensor
▼
INT BIL INF
0 - No error, normal operation
1 - No signal, ow sensor is empty
2 - Flow ows in an reverse direction
4 - Flow rate greater than 1.2∙qs (are displayed q=1,2qs)
8 - Electronics failure
Active info codes are added and displayed simultaneously,
even if it is more than one error.
3 - corresponds to error 2 + 1
5 - corresponds to error 4 + 1
7 - corresponds to error 4 + 2 + 1
9 - corresponds to error 8 + 1
A - corresponds to error 8 + 2
B - corresponds to error 8 + 2 + 1
D - corresponds to error 8 + 4 + 1
E - corresponds to error 8 + 4 + 2
F - corresponds to error 8 + 4 + 2 +1
When any info code is ≥ 8, measurement of energy and vol-
ume stops. Operating time without error stops counting.
When the ow sensor shows error 4 during operation, the time
in the register is counted “ow over q> 1.2 * qs”

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15
Accuracy class 2 according LST EN1434-1:2007
Units, energy kWh, MWh, GJ, Gcal
Max value, power 2,63 MW
Flow measurement
The meters are provided with dynamic measuring range R100
and R250, i.e. qp = qi x 100 or qp = qi x 250. R250 is only
available for qp 1.5, 2.5, 6.0 and 15 m3 / h.
Technical data
Flow rate (m3/h) Connection Length L
(mm)
Nom. pres-
sure PN
(bar)
Pressure
drop at qp
(kPa)
Weight
(kg)
Nom. qp Max qs Min qi* Start
0,6 1,2 0,0060 0,003 G20/G¾” 110 16 7,0 1,0
1,2 0,0060 0,003 G25/G1” (and DN20) 190 16 0,90 1,3
1,5 3,0 0,015/0,0060 0,003 G20/G¾” 110 16 17,1 1,0
3,0 0,015/0,0060 0,003 G25/G1” (and DN20) 190 16 5,8 1,3
3,0 0,015 0,005 G25/G1” 130 16 7,2 1,3
2,5 5,0 0,025/0,010 0,005 G25/G1” 130 16 19,8 1,3
5,0 0,025/0,010 0,005 G25/G1” (and DN20) 190 16 9,4 1,3
3,5 7,0 0,035 0,017 G32/G1¼” 260 16 4,0 3,9
6,0 12 0,060/0,024 0,012 G32/G1¼” (and DN25) 260 16 10 3,9
10 20 0,040/0,10 0,02 G50/G2” (and DN40) 300 16 18 4,0
15 30 0,15/0,060 0,03 DN50 ange 270 16 12 6,8
25 50 0,25/0,10 0,05 DN65 ange 300 16 20 13
40 80 0,40/0,16 0,08 DN80 ange 300 16 18 14
60 120 0,60/0,24 0,12 DN100 ange 360 16 18 19
*) Minimum values are R100 / R250
Temperature limits for the liquid
• For ow sensors qp 2.5 m3 / h 5 ° C .... 130 ° C
• For ow sensors qp ≥ 3.5 m3 / h 10 ° C .... 130 ° C
Note: For liquid temperature below 90 ° C, the integra-
tor can remain on the ow sensor or be mounted on the
wall. For liquid temperature above 90 ° C, the integrator
must be mounted on the wall.
Connection cable length between the integrator and the ow
sensor 1.2 m.
Maximum working pressure 16 bar (PN16).
The meter’s behavior, when the ow rate exceeds the maxi-
mum ow qs:
• Linear at ow rate up to q = 1.2 ∙ qs
• Constant at ow rate q> 1.2 ∙ qs (q = 1.2 ∙ qs is as-
sumed for heat energy calculation).
The error message ”Maximum allowable ow rate value
is exceeded” is displayed
Temperature measurement
Temperature range, cal-
culator
0°C .... 180°C
Temperature dierence
range
2K .... 150K (eller 3K .... 150K)
Temperature sensors
Platinum resistance tempe-
rature sensors Pt500
Pt 500 (according EN60751 and paired
according EN1434 and MI004 in direc-
tive 2014/32/EU)
Alternative temperatur
sensors
Pt1000 (on request)
For threaded meters G20,
G25 and G32
Direct mounted short sensors type DS
according LST EN1434-2
For all other connections Pocket mounted longer sensors type PL
according LST EN1434-2
Cable lengths for 2 wire temperature sensors
Sensor type DS (see above) 1.5m standard (2.5 or 5m on request)
Sensor type PL (see above) Cable length depending on meter size
(3 up to 10m)
LCD Display
The device is equipped with 8-digit LCD (Liquid Crystal Dis-
play) with special symbols to display parameters, units of
measurement and operating modes.
The following information can be displayed: integrated and
instantaneous measured parameters, and archive data and
device conguration.
Display resolution, depending on permanent value ow rate, is
provided in the following table.
Permanent ow rate qp < 6 m3/h ≥ 6 m3/h
Resolution volume, m3 00000,001 00000,001
Resolution energy, kWh
(MWh)
0000000,1 kWh 00000,001 MWh
Resolution energy, Gcal 00000,001 Gcal 00000,001 Gcal
Resolution energy, GJ 00000,001 GJ 00000,001 GJ
Flow sensors can be supplied for thread connection (up to qp
10 m3 / h) or ange.
Technical data for the ow sensor is presented in the following
table.

Register and data logger
Every hour, day and month, measured values are saved in the
meter’s memory. All logged data can be read using remote
reading. Only data loggers for monthly parameters can be
seen on the display. The following values are logged in the
meter’s memory daily, weekly and monthly:
1. Total energy
2. Total cooling energy
3. Total energy in tari 1
4. Total energy in tari 2
5. Total uid volume
6. Total pulse value in pulse input 1
7. Total pulse value in pulse input 2
8. Maximum power for heat and date
9. Maximum power for cooling and date
10. Maximum ow value and date
11. Maximum ow temperature value for the uid and date
12. Maximum value of the return temperature for the liquid
and date
13. Minimum ow temperature value for the uid and date
14. Minimum value of return temperature for the liquid and
date
15. Minimum temperature dierence and date
16. Average ow temperature of the liquid
17. Mean return temperature of the liquid
18. Operating time without error
19. Total eld time
20. Time when the ow exceeded 1.2 qs
21. Time when ow rate was lower than qi
Ambiductor AB reserves the right to make changes without prior notice. Reprinting or copying this publication without permission is prosecuted.
16
Data logger capacity
Hourly values 1480 hours
Daily values 1130 days
Monthly values 36 months
Archived data storage - at least 36 months.
Storage time of measured values, even if the unit is discon-
nected from the power supply - at least 15 years.
Mechanical data
Outer dimensions, calculator 117 mm x 44 mm x 89,5 mm
Outer dimensions, ow sensor See separate section
Environmental conditions
Environmental class Class C acc. EN1434 (industry)
Ambient temperature, cal-
culator
+5°C .... 55°C (condensation free,
indoor)
Ambient temperature, ow
sensor
-30°C .... 55°C (condensation free,
indoor)
Relative humidity <93%
Mechanical class M1
Electromagnetic class E2
Protection class, calculator IP65
Protection class, ow sensor IP65 (IP67 on request)
Pressure drop
Accuracy
Error tolerance according EN 1434 class 2

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17
Power supply
Internal battery
2 type AA 3.6VDC 2.4 Ah Lithium battery (Li-SOCL2).
Designed to last at least 11 years.
24V module
12 ... 42 VDC or 12 ... 36 VAC 50 / 60Hz max 10mA + internal
battery backup (AA 3.6VDC 2.4 Ah Lithium battery (Li-SOCL2).
The power supply module replaces one battery.
230V unit (external)
230VAC (+ 10 / -30%) 50/60 Hz, approx. 10mA in.
12VAC 40mA (max) out.
Remote reading
Optical interface can be used for reading data from the meter.
The optical head is placed on the meter and connected to RS-
232 or USB.
In addition to remote reading via IR, it is also possible to use
two pulse outputs, or one of the following communication
modules.
Wired communication:
• M-Bus (default)
• Modbus RTU
• BACnet TCP
• LON
• CL module (current loop)
Wireless communication:
• Lora
• wireless M-bus T1 OMS
• wireless M-bus S1 (and Axioma bi-directional radio)
All modules have separate documentation. The modules can
also support mounting in other of our meters.
Our meters are normally backwards and forwards compatible
with old and new modules.
Optical interface
Integrated in the front panel of the calculator. It is used for
data reading via the M-bus protocol and parameterization of
the meter.
The optical interface is activated only after pressing the button
and automatically shuts o after 5 minutes after the last key
press or after the data transfer is completed via the interface.
M-bus
The cards use 1.5mA (1 M-bus load). See separate documen-
tation.
Lora
Separate documentation is available. The meter can be con-
nected to any network server and application server. Param-
eter list can be obtained on request.
LoRa meters can be remotely programmed with MAC com-
mands. Contact Ambiductor for more information.
Pulse outputs
The pulse outputs are active when the jumpers of the connec-
tor (J) are open (see Setting the Jumpers J)
No communication interface aects measurement values and
their calculation, and can therefore be replaced by another
type without removing the seal.
Data collection from meters can be done via PC, modem, GSM,
broadband etc.
Number of possible
outputs
2 pcs (OB normal mode, OD test mode)
Pulse type Open collector (transistor), permitted cur-
rent up to 20 mA, voltage up to 50V
Pulse length 100 ms - in normal operating mode, 1.6
ms - in test mode
Pulse values (energy and volume) of pulse output device in
operating mode according to the table below:
Energy pulse output #1
Energy units kWh, MWh GJ Gcal
Pulse value, energy 1 kWh/p 0,005 GJ/p 0,001Gcal/p
Energy pulse output #2
Permanent ow
rate qp m3/h
0,6...6,0 10...60
Pulse value, ow
rate
1 l/p 10 l/p
Pulse inputs
The pulse inputs are active when the jumpers of the connector
(J) are closed (see Setting the Jumpers J)
Number of pulse inputs 2
Measuring units m3
Pulse value Programmable
Pulse type IB acc. LST EN1434-2
Maximum frequency of
pulses
3 Hz
Max voltage on pulses 3,6 V
Bus communication limitation
The total working time for serial communication interfaces (to
protect the battery from premature discharge) is limited to
130 minutes per month. The remaining time for communica-
tion is stored in the calculator. The interface is blocked after
reaching the limit and only after the start of the next hour, the
new time limit on communication will be given (to 11 seconds
for each subsequent hour).
To release the restriction, connect external power supply and
follow the instructions at www.ambiductor.se/support.
This requires connection via m-bus or optical IR port.

Marking and sealing
Marking
The calculator
The following information can be found on the front of the
calculator:
• Manufacturer’s brand
• Type of meter
• Serial number
• Year
• Approval number
• Temperature range
• Temperature dierence range
• Accuracy class
• Environmental class according to LST EN1434-1,
• Electromagnetic and mechanical environmental class
• Protection
• Type of temperature sensor
• Installation page (supply or return line)
• Flows (Qi, qp, Qs)
• Maximum temperature range for ow sensor
• Maximum permissible working pressure
• Nominal pressure
• Voltage level for power supply
Terminal numbers are indicated next to the terminals
Flow sensors
There is the following information on the ow sensor:
• Nominal diameter
• Arrow for indicating a ow direction
Sealing
The seal of the manufacturer
• A warranty designation on a screw in the enclosure’s
enclosure (see below).
• Sealing the screws on the protective cover for the ow
sensor (sticker or wire seal as shown below).
Valideringsplombering
• A seal on a screw in the enclosure’s enclosure (see be-
low).
• Seals on the screws in the ow sensor housing (sticker
or wire seal as shown below).
Monteringsplombering
• Sealing thread between the upper and lower part of the
enclosure’s enclosure (see below)
• Seal tube for temperature sensor (see below).
The meter must be sealed to ensure that it is not possible to
disassemble, remove or change the meter without apparent
damage to the meter or seal after commissioning.
Sealing of calculator
Explanations:
1. Verication seals
2. Factory seals
3. Mounting seals
Seals on ow sensors
DN15...20; L=110mm DN15...20; L=130mm
DN25 DN40 thread
DN 40 ange DN50 ange
Seals on temp sensor PL (dip tube)
At 45 ° inclination Perpendicular to pipes
Seals on temp sensor DS (direct)
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18

Dimensions and connections
Dimensions calculator for HEAT 1
Dimensions HEAT 1 DN15 (G20 / G¾”)
Dimensions HEAT 1 DN20 (G25 / G1”) 130mm
Dimensions HEAT 1 DN20 (G25 / G1”) 190mm
Dimensions HEAT 1 DN20 ange
Dimensions HEAT 1 DN25 (G32 / G1¼”)
Ambiductor AB reserves the right to make changes without prior notice. Reprinting or copying this publication without permission is prosecuted.
19

Version 19a
Dimensions HEAT 1 DN25 ange
Dimensions HEAT 1 DN40 (G50 / G2”)
Dimensions HEAT 1 DN40 ange
Dimensions HEAT 1 DN40 ange, alternative
Dimensions HEAT 1 DN50 ange
Dimensions HEAT 1 DN65 ange
Dimensions HEAT 1 DN80 ange
Dimensions HEAT 1 DN100 ange
About Ambiductor
Ambiductor focus in the following areas:
• Energy meter
• Water meters
• Oil meters and meters for industrial liquids
• Smart metering and measurement collection
• Lora products
Ambiductor is a engineering company with many years of ex-
perience in measurement technology, automation and remote
reading. With us, you experience a high level of service and
wide range with the possibilities of solving all possible applica-
tions.
See instructional videos and
assembly guides on
www.ambiductor.se/support
Disclaimer!
”If there is any inconsistency bet-
ween this version and the document
in it’s original language, the original document will prevail.”
Ambiductor AB
Flow & Energy Analysis Systems
Armévägen 61-63 +46 (0)8 501 676 76
S-187 64 TÄBY Sweden
info@ambiductor.se www.ambiductor.se
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