Apator Powogaz INVONIC H Installation instructions

Apator Powogaz S.A.
ul. Klemensa Janickiego 23/25, 60-542 Poznań, Poland
tel.: [phone], fax: [phone],192
www.apator.com
Ultrasonic heat and cooling meter
| INVONIC H |
Installation & operating manual
ISO 9001 PN-N-18001 ISO 14001

2018-05-09 - 2 -
Contents
1. Application ................................................................................................................................................................................................ 3
2. Specification ............................................................................................................................................................................................. 6
3. Operating principle.................................................................................................................................................................................... 9
4. Marking and sealing.................................................................................................................................................................................. 9
4.1. Marking..................................................................................................................................................................................................... 9
4.1.1. Calculator ................................................................................................................................................................................................. 9
4.1.2. Flow sensor .............................................................................................................................................................................................. 9
4.2. Security seals ........................................................................................................................................................................................... 9
5. Installation .............................................................................................................................................................................................. 10
5.1. Basic requirements................................................................................................................................................................................. 10
5.2. Electrical wiring....................................................................................................................................................................................... 10
5.2.1. Temperature sensors connection ........................................................................................................................................................... 10
5.2.2. Installation of expansion modules in the calculator................................................................................................................................. 11
5.2.3. Installation of the M-Bus module ............................................................................................................................................................ 11
5.2.4. Installation of the radio wM-Bus module................................................................................................................................................. 11
5.2.5. Installation of the Modbus / BACnet module........................................................................................................................................... 12
5.2.6. Installation of the external power supply module.................................................................................................................................... 13
5.3. Mounting................................................................................................................................................................................................. 14
5.3.1. Mounting of calculator............................................................................................................................................................................. 14
5.3.2. Mounting of flow sensor.......................................................................................................................................................................... 15
5.3.3. Mounting of temperature sensors ........................................................................................................................................................... 16
5.4. Setting up the jumper.............................................................................................................................................................................. 16
5.5. Verifying the installation and configuration ............................................................................................................................................. 17
5.6. Sealing after the installation.................................................................................................................................................................... 17
6. Operation................................................................................................................................................................................................ 17
6.1. Operating the LCD display...................................................................................................................................................................... 17
6.2. Display functions..................................................................................................................................................................................... 17
6.3. Menu structure........................................................................................................................................................................................ 18
6.3.1. Viewing the readings in normal mode (user's menu).............................................................................................................................. 18
6.3.2. Test mode reading display (service menu)............................................................................................................................................. 24
6.3.3. Error codes ............................................................................................................................................................................................. 25
6.4. Test mode............................................................................................................................................................................................... 26
6.4.1. Destination of connector configuration pins............................................................................................................................................ 26
6.4.2. Activating test mode (verification)........................................................................................................................................................... 26
6.4.3. Deactivating test mode ........................................................................................................................................................................... 27
6.5. Remote data reading .............................................................................................................................................................................. 27
7. Metrological verification .......................................................................................................................................................................... 27
8. Storage and transport requirements ....................................................................................................................................................... 27
9. Warranty ................................................................................................................................................................................................. 28
10. Appendix A ............................................................................................................................................................................................. 28
11. Appendix B ............................................................................................................................................................................................. 30
12. Appendix C ............................................................................................................................................................................................. 35

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EC DECLARATION OF CONFORMITY
Apator Powogaz S.A. hereby declares that this product meets the requirements of the following directives:
–2014/32/EU Measuring Instruments Directive (MID)
–2014/30/EU EMC Directive
–2014/35/EU Low voltage Directive
–2014/53/EU Radio Equipment Directive (RED)
EC type examination certificate no. LT-1621-MI004-029 revision 1
FOR EU CUSTOMERS: WEEE MARKING
Marking of electrical and electronic equipment per Article 14(2) of Directive 2012/19/EU
When this symbol is placed on a product, the product cannot be disposed of with household waste. The product must be processed
under a proper waste electrical and electronic equipment collection and disposal program. Contact your local authorities for more
information about how this product should be recycled.
SAFETY GUIDELINES
Before installing this product, read this Manual and follow all information and guidance provided herein.
Caution: If the product is used otherwise than intended by its manufacturer, its safety level might be compromised.
1. The meter is powered with a battery (rated at 3.6 V), and the risk factor of its installation and servicing is the working medium flowing at a
maximum pressure of 2.5 MPa and a maximum temperature of 180°C.
2. Only qualified technical professionals may install and service the meters. Qualified technical professionals must know and understand the
technical manuals of this product and applicable general safety rules. Follow all applicable general safety rules when installing and servicing
this product.
3. This product meets Safety Class II requirements. The product does not require a protective earth bonding; its enclosure is made of plastic,
and all electrically conductive components are contained within it.
4. The safety of installation and servicing of the meter is guaranteed by:
proper insulation of electrical wiring;
leak-proof connections of the flow sensor and temperature sensors on the service pipeline;
reliable fitting of the meter components in the service installation.
5. Safety requirements for the temperature sensors, see the applicable technical manuals.
6. Operating environment:
Ambient temperature:
oCalculator: from +5oC to +55oC
oFlow sensor: from -30oC to +55oC
Relative humidity: < 93
CAUTION! Assemble and disassemble the components of the meter only when you have verified that its pipeline contains no working medium
(liquid).
1. Application
The INVONIC H ultrasonic heat and cooling meter has been designed for measuring heating and cooling energy and recording the metered
values in two separate registers. It is intended for billing the consumption of heating/cooling energy in district or industrial heating/cooling systems
which serve residential houses, office buildings, energy plants and the like.
The microprocessor compact ultrasonic heat and cooling meter can be mounted either on the supply pipeline or the return pipeline.
The meter is available with a pair of factory-installed temperature sensors and as well in version where user can install his own pair of type
approved temperature sensors compliant with Directive 2014/32/EU of 26 February 2014 on measuring instruments (the MID, or the Measuring
Instruments Directive).`
Meter complies to essential requirements of the Technical Regulations For Measuring Instruments, dated 30 October 2015 (transposing in the
NB’s country law Directive 2014/32/EU of 26 February 2014 on measuring instruments:
Annex I (Essential requirements)
Annex MI-004 (Heat meters)
The INVONIC H complies with the European standard EN 1434 “Heat meters”, Parts 1+6.
The INVONIC H complies with Class C of environmental protection requirements according to EN 1434-1:2016
Ambient temperature range: from +5°C to +55°C
Humidity: condensing
Location: indoor
Mechanical environment class: M1
Electromagnetic environment class: E2

2018-05-09 - 4 -
Type number coding of the INVONIC H heat/cooling meter:
A
B
C
D
E
F
G
H
I
J
Flow rate measuring range qi/qp
Code
1:100
H
1:250*
I
Mounting place and nominal pressure
Code
supply pipe, PN16
1
supply pipe, PN25
2
return pipe, PN16
3
return pipe, PN25
4
Meter type, calculator IP rating, flow sensor IP rating,
working medium, compliance with directive
Code
heat meter, IP65, IP65, water, MID
A
heat meter, IP65, IP67, water, MID
B
heat and cooling meter, IP65, IP67, water, MID
C
heat and cooling meter, IP65, IP67, 16% propylene glycol
D
heat and cooling meter, IP65, IP67, 25% propylene glycol
E
heat and cooling meter, IP65, IP67, 38% propylene glycol
F
heat and cooling meter, IP65, IP67, 47% propylene glycol
G
heat and cooling meter, IP65, IP67, 20% ethylene glycol
H
heat and cooling meter, IP65, IP67, 34% ethylene glycol
I
heat and cooling meter, IP65, IP67, 44% ethylene glycol
J
heat and cooling meter, IP65, IP67, 52% ethylene glycol
K
Energy unit
Code
GJ
1
kWh
2
MWh
3
Gcal
4
Flow sensor (nominal flow rate, body length, connection
type and size)
Code
0.6 m3/h, 110 mm, threaded, DN15 / G¾”
A
0.6 m3/h, 190 mm, threaded, DN20 / G1”
B
0.6 m3/h, 190 mm, flanged, DN20
C
1 m3/h, 110 mm, threaded, DN15 / G¾”
D
1 m3/h, 190 mm, threaded, DN20 / G1”
E
1 m3/h, 190 mm, flanged, DN20
F
1.5 m3/h, 110 mm, threaded, DN15 / G¾”
G
1.5 m3/h, 130 mm, threaded, DN20 / G1”
H
1.5 m3/h, 190 mm, threaded, DN20 / G1”
I
1.5 m3/h, 190 mm, flanged, DN20
J
2.5 m3/h, 130 mm, threaded, DN20 / G1”
K
2.5 m3/h, 190 mm, threaded, DN20 / G1”
L
2.5 m3/h, 190 mm, flanged, DN20
M
3.5 m3/h, 260 mm, threaded, DN25 / G1¼”
N
3.5 m3/h, 260 mm, flanged, DN25
O
6 m3/h, 260 mm, threaded, DN25 / G1¼”
P
6 m3/h, 260 mm, flanged, DN25
Q
10 m3/h, 300 mm, threaded, DN40 / G2”
R
10 m3/h, 300 mm, flanged, DN40
S
15 m3/h, 270 mm, flanged, DN50
T
25 m3/h, 300 mm, flanged, DN65
U
40 m3/h, 300 mm, flanged, DN80
V
60 m3/h, 360 mm, flanged, DN100
W
Power supply
Code
battery power (battery not included)
0
battery power (1 × AA; 3.6 V; 2.7 Ah)
1
battery power (2 × AA; 3.6 V; 2.7 Ah)
2
external power supply module 12-36 V AC / 12-42 V DC +
battery power (1 × AA2; 3.6 V; 2.7 Ah)
3
external power supply module 12-36 V AC / 12-42 V DC +
230 V power adapter + battery power (1 × AA; 3.6 V; 2.7 Ah)
4
230 V power adapter + battery power (1 × AA; 3.6 V; 2.7 Ah)
5
230 V power adapter + battery power (2 × AA; 3.6 V; 2.7 Ah)
6
G
H
I
J

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Type number coding of the INVONIC H heat/cooling meter:
A
B
C
D
E
F
G
H
I
J
Communication modules
Code
none
A
M-Bus module
B
current loop (CL) module
C
radio wM-Bus S1 module (868 MHz)
D
Modbus RTU RS-485 module
E
radio wM-Bus T1 OMS module (868 MHz), individual password per module
F
radio wM-Bus T1 OMS module (868 MHz), common password for all
modules
G
BACnet MS/TP RS-485 module
H
Flow sensor to calculator wiring length
Code
1.2 m
1
2.5 m
2
5.0 m
5
Configuration profiles settings applies only to wM-Bus radio module
(in the case of other modules default profile name is "A")
Code
walk-by system: radio module transmits the following registers every 30 s,
from Monday to Friday, from 6 to 18 (6 AM to 6 PM): serial number; date;
heat energy; cooling energy**; volume; actual flow and power; volume from
pulse input 1 and 2; energy and volume of last month with write date; energy
and volume of last year with write date; active errors with timestamp;
operating time without energy calculation error; supply and return
temperature
A
drive-by system: radio module transmits the following registers every 20 s,
from Monday to Friday, from 6 to 16 (6 AM to 4 PM): serial number; date;
heat energy; cooling energy**; volume; volume from pulse input 1 and 2;
energy and volume of last month with write date; energy and volume of last
year with write date; active errors with timestamp
B
stationary system: radio module transmits the following registers every 180
s, 24/7: serial number; date; heat energy; cooling energy**; volume; actual
flow and power; volume from pulse input 1 and 2; energy and volume of last
month with write date; energy and volume of last year with write date; active
errors with timestamp; operating time without energy calculation error; supply
and return temperature; maximum temperatures, flow and power during last
month
C
Temperature sensors
Code
none (without bolt protecting temperature sensor sleeve in the meter body)
0
none (with bolt protecting temperature sensor sleeve in the meter body)
1
pair of Pt500 M10x1 sensors for direct installation with 1.5 m long wiring
and a brass fixing screw (Ø 5.2 mm, 0-150°C)
2
pair of Pt500 M10x1 sensors for direct installation with 1.5 m long wiring
and a plastic fixing screw (Ø 5.2 mm, 0-150°C)
3
pair of Pt500 M10x1 sensors for direct installation with 2 m long wiring and
a plastic fixing screw (Ø 5.2 mm, 0-150°C)
4
pair of Pt500 M10x1 sensors for direct installation with 2 m long wiring and
a brass fixing screw (Ø 5.2 mm, 0-150°C)
5
pair of Pt500 M10x1 sensors for direct installation with 3 m long wiring and
a plastic fixing screw (Ø 5.2 mm, 0-150°C)
6
pair of Pt500 M10x1 sensors for direct installation with 3 m long wiring and
a brass fixing screw (Ø 5.2 mm, 0-150°C)
7
pair of Pt500 M10x1 sensors for direct installation with 5 m long wiring and
a plastic fixing screw (Ø 5.2 mm, 0-150°C)
8
pair of Pt500 M10x1 sensors for direct installation with 5 m long wiring and
a brass fixing screw (Ø 5.2 mm, 0-150°C)
9
pair of Pt500 sensors for installation in pockets with 3 m long wiring (Ø 6
mm, 0-150°C)
A
pair of Pt500 sensors for installation in pockets with 5 m long wiring (Ø 6
mm, 0-150°C)
B
* with the exception of flow sensors with a nominal flow qp0.6 m3/h; 1 m3/h; 1.5 m3/h (130 mm); 3.5 m3/h
** register available only in heat and cooling meters

2018-05-09 - 6 -
2. Specification
Accuracy class: 2 by EN1434-1:2007
Energy units: GJ, Gcal, kWh, MWh
Maximum value of thermal power: 5.28 MW
Flow measurement
Nominal flow rate to minimum flow rate ratio (should be specified when ordering):
qp/qi100 or qp/qi250 [available only for meters with qp1.5 m3/h (110 mm and 190 mm); 2.5 m3/h; 6 m3/h; 10 m3/h; 15 m3/h; 25 m3/h;
40 m3/h; 60 m3/h]
The flow sensor can either be threaded (max qp= 10 m3/h) or flanged.
Table 2.1. Flow sensor technical specifications
Nominal flow
qp, m3/h
Maximum flow
qs, m3/h
Minimum
flow qi, m3/h
Starting flow,
m3/h
Overall length
L, mm
Pressure loss at
qp, kPa
Pipeline connection
(G –threaded,
DN –flanged)
0.6
1.2
0.006
0.003
110
7.0
G¾“
0.6
1.2
0.006
0.003
190
0.9
G1“ or DN20
1.0
2.0
0.010
0.005
110
11.3
G¾“
1.0
2.0
0.010
0.005
190
2.5
G1“ or DN20
1.5
3.0
0.006
0.003
110
17.1
G3/4“
1.5
3.0
0.006
0.003
190
5.8
G1“ or DN20
1.5
3.0
0.015
0.003
110
17.1
G3/4“
1.5
3.0
0.015
0.003
190
5.8
G1“ or DN20
1.5
3.0
0.015
0.005
130
7.2
G1“
2.5
5.0
0.010
0.005
130
19.8
G1“
2.5
5.0
0.010
0.005
190
9.4
G1“ or DN20
2.5
5.0
0.025
0.005
130
19.8
G1“
2.5
5.0
0.025
0.005
190
9.4
G1“ or DN20
3.5
7.0
0.035
0.017
260
4.0
G1¼“ or DN25
6.0
12.0
0.024
0.012
260
10.0
G1¼“ or DN25
6.0
12.0
0.060
0.012
260
10.0
G1¼“ or DN25
10.0
20.0
0.040
0.020
300
18.0
G2“ or DN40
10.0
20.0
0.100
0.020
300
18.0
G2“ or DN40
15.0
30.0
0.060
0.030
270
12.0
DN50
15.0
30.0
0.150
0.030
270
12.0
DN50
25.0
50.0
0.100
0.050
300
20.0
DN65
25.0
50.0
0.250
0.050
300
20.0
DN65
40.0
80.0
0.160
0.080
300
18.0
DN80
40.0
80.0
0.400
0.080
300
18.0
DN80
60.0
120.0
0.240
0.120
360
18.0
DN100
60.0
120.0
0.600
0.120
360
18.0
DN100
Working medium (liquid) temperature range: from +5°C to +130°C.
Important: If the working medium temperature is equal to 90°C or lower, the calculator can be installed directly on the flow sensor or on a wall.
If the working medium temperature exceeds 90°C, the calculator must be physically separated from the flow sensor and installed on a wall.
Flow sensor to calculator cable length: 1.2 m (2.5 m and 5.0 m available on custom order)
Maximum operating pressure: 16 bars (25 bars available on custom order)
Behaviour of the meter, when the flow rate exceeds the maximum flow qs:
for flow rate q < 1.2 × qs–linear;
for flow rate q > 1.2 × qs–constant (the formula q = 1.2 × qsis used to calculate the heat energy). The error "Maximum allowable
value of flow rate is exceeded " is registered with duration of this error state.
Pulse inputs
Number of pulse inputs: 2
Measurement unit: m3
Pulse value: programmable
Type of pulses: IB by EN 1434-2
Min. pulse width: 100 ms
Maximum permissible frequency of input pulses: 3 Hz
Maximum permissible voltage of input pulses: 3.6 V
Condition of maintenance of high level: 3.6 V via 3.3 MΩ resistor
Temperature measurement
Temperature measuring range (for the calculator): 0-180°C
Temperature difference measuring range (for temperature inputs): 3-150 K* or 2-150 K*
Temperature difference below which the energy is not totalled 0.15 K
Temperature sensor type: platinum, Pt500, resistive, compliant with EN 60751 and paired according with

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EN 1434 and Directive 2014/32/EU Annex MI-004
Sensor installation to meters with threaded connection: short, directly mounted (type DS) in accordance with EN 1434-2
Sensor installation to meters with flanged connection: short or long, pocket mounted (type PS & PL) in accordance with EN 1434-2
Connection method and maximum cable length: 2-wire; up to 5 m
* the lower temperature measuring limit depends on the parameters of connected temperature sensors
LCD display
The meter features an 8-digit LCD display with special icons for displaying parameters, units, and operating modes. The LCD can display the
following indications: total and instantaneous measured parameter values, archived data and meter configuration data. See p. 6.3.1 for details.
Display resolution for energy: 00000001 kWh; 00000.001 GJ / Gcal / MWh
Display resolution for volume: 00000.001 m3
Data registration and storage
Every hour, day and month values of the measured parameters are stored in the meter's memory. All archived data can be accessed only with
a remote reading interface (see p. 6.5). The monthly values of the parameters stored in the data logger can be read from LCD display (see
p. 6.3.1).
Table 2.2. Parameter values recorded by meter hourly, daily and monthly
No.
Parameter
1
Total heat energy
2
Total cooling energy
3
Tariff 1 total energy
4
Tariff 2 total energy
5
Total working medium volume
6
Pulse input 1 total volume
7
Pulse input 2 total volume
8
Maximum thermal power value for heating & measurement date
9
Maximum thermal power value for cooling & measurement date
10
Maximum flow rate value & measurement date
11
Maximum working medium supply temperature & measurement date
12
Maximum working medium return temperature & measurement date
13
Minimum working medium supply temperature & measurement date
14
Minimum working medium return temperature & measurement date
15
Minimum working medium temperature difference & measurement date
16
Average working medium supply temperature
17
Average working medium return temperature
18
Meter running time without energy calculation errors
19
Total error code
20
Total time when flow rate exceeded the maximum flow (1.2 × qs)
21
Total time when flow rate was less than the minimum flow (qi)
Data logger capacity:
up to 1480 h of hourly records
up to 1130 days of daily records
up to 36 last months of monthly records
Storage time of measured total parameter values even if device is disconnected from power supply - not less than 15 years.
External communication modules and interfaces
Optical interface
The integrated optical interface port is located on the calculator's enclosure front. It is designed for data reading and parametrization of meter
via M-Bus protocol. The optical interface is enabled (activated) only after single press of the button on the meter front panel and automatically
disabled when 5 minutes have passed either from last press of the button or since last data transmission.
Pulse outputs
The standard heat meter includes pulse outputs through which information about heat energy consumption, cooling energy consumption, or
working medium volume could be send.
Number and class of pulse outputs: 2 (OB –in normal mode, OD –in test mode)
Pulse output type: open collector (max permissible current up to 20 mA; max voltage up to 50 V)
Pulse time width: 125 ms –in normal mode; 1.2 ms –in test mode

2018-05-09 - 8 -
Table 2.3. Energy pulse values at the pulse output in normal mode
Energy unit
kWh / MWh
GJ
Gcal
Pulse value
1 kWh/pulse
0.005 GJ/pulse
0.001 Gcal/pulse
Table 2.4. Volume pulse values at the pulse output in normal mode
Flow sensor nominal flow qp
0.6; 1; 1.5; 2.5; 3.5; 6 m3/h
10; 15; 25; 40; 60 m3/h
Pulse value
1 l/pulse
10 l/pulse
Optional plug-in modules
M-Bus module
Radio wM-Bus module (868 MHz)
Modbus RTU module (RS-485)
BACnet module (RS-485)
M-Bus module
Designed for data reading and programming the meter via M-Bus protocol. The total working time of the serial communication interface is
limited to 200 minutes a month (for protection of the battery against premature discharge). Unused communication time limit is summarized.
Once the communication time limit has been spent, the interface is locked out till new time limit for communication will be given (16 seconds
for each next hour).
Power supply
The standard version of meter has one AA-size battery (3.6 V; 2.7 Ah; Li-SOCl2) installed inside the calculator. The minimum battery life is 11
years, including the voltage required for operation of the pulse outputs. The meter can be equipped with up to two batteries.
As an option meter could be equipped with external power supply module (12-42 V DC or 12-36 V AC 50/60 Hz,10 mA max). The power supply
module is installed inside the calculator in place designated for second battery. In such case meter has one AA-size battery (3.6 V; 2.7 Ah;
Li-SOCl2) inside with a minimum battery life of 11 years (not including the voltage drain by reading of optional communications modules) and
powers the meter whenever the external power source is turned off.
An optional power adapter (230 V 50/60 Hz / 12 V AC) is available separately with a cable which total length is 2.5 m to feed the external power
supply module.
Mechanical specification
Calculator dimensions: 117 × 44 × 89.5 mm
Flow sensor dimensions: see Appendix B
Total meter weight: see Table 2.5.
Table 2.5. Weight of meters
Connection type and size; flow sensor length
Max. meter weight (kg)
G3/4" (110 mm)
0.8
G1" (130 mm)
0.9
G1" (190 mm)
1.1
G1 ¼" (260 mm)
3.6
G2" (300 mm)
7.4
DN20 (190 mm)
2.9
DN25 (260 mm)
6.1
DN40 (300 mm)
9.2
DN50 (270 mm)
8.5
DN65 (300 mm)
13.0
DN80 (300 mm)
15.0
DN100 (360 mm)
18.0
Environmental class: C according to EN 1434
Ambient temperature:
calculator from +5°C to +55°C (condensing, indoor installation)
flow sensor from -30°C to +55°C
Relative humidity: < 93
Mechanical environment class: M1
Electromagnetic environment class: E2
Calculator enclosure ingress protection rating: IP65
Flow sensor enclosure ingress protection rating: IP65 (IP67 available on custom order)

- 9 - 2018-05-09
3. Operating principle
The flow measuring principle is based on ultrasonic measurement method. The ultrasonic signal is transmitted alternately in either of the two
directions along the measurement part. The flow value is calculated from the transition time difference between the ultrasonic waves with
identical wavelength that was send in the right and opposite direction.
The working medium temperature is measured with standard Pt500 platinum resistive temperature sensors. Pairs of temperature sensors with
2-wire connection method for measurement temperatures on flow and return pipelines are used. Flow and return temperature sensors can only
be replaced on the factory-made pairs.
In normal mode the flow volume measurement is done every 1 second, and the temperature measurement, energy value calculation and refresh
of the values indicated on LCD are done every 16 seconds.
Energy calculation formulas:
flow sensor in supply pipe: Q = V1× ρ1× (hT1 - hT2)
flow sensor in return pipe: Q = V1×ρ2× (hT1 - hT2)
where:
Q –thermal energy
V1–water volume (m3)
Θ1–supply temperature
Θ2 –return temperature
ρ1 / ρ2–water density at supply temperature Θ1/ return temperature Θ2
hT1 / hT2 –enthalpy at supply temperature Θ1/ return temperature Θ2
When cooling energy measurement is enabled and the temperature difference is negative (supply temperature < return temperature) with the
value above 0.15 K then the cooling energy values will be written in the additional register:
∑Q = Q1+ Q2
Q1–heat energy
Q2–cooling energy
flow sensor in supply pipe:
when Θ1> Θ2: Q1= V1× 1× (hT1 - hT2), Q2= 0
when Θ1< Θ2: Q2= V1× 1× (hT2 - hT1), Q1= 0
flow sensor in return pipe:
when Θ1> Θ2: Q1= V1× 2× (hT1 - hT2), Q2= 0
when Θ1< Θ2: Q2= V1× 2× (hT2 - hT1), Q1= 0
The meter's calculator provides all the necessary measurement and data storage functions.
4. Marking and sealing
4.1. Marking
4.1.1. Calculator
There are following information on the front panel of calculator: manufacturer's trade mark, meter type, temperature sensors type, calculator
temperature measuring range, calculator temperature difference measuring range, flow sensor temperature range, nominal/maximum/minimum
flow rate (qp/qs/qi), year of manufacture, connection type and size, nominal and maximum admissible working pressure, device ingress protection
rating, accuracy class, environmental class according EN1434-1, electromagnetic and mechanical environmental class, EC-type examination
certificate number, flow sensor mounting place (supply or return pipe), type of working medium and concentration (if other than water), serial
number and distributor's logo (if applicable).
The terminal pins numbers are marked close to the terminal which is inside the calculator.
4.1.2. Flow sensor
The flow sensor is marked with the following information: connection type to the pipeline (threaded connection –G, flanged connection –DN)
and size, the arrow for indication of a proper flow direction of working medium.
4.2. Security seals
The manufacturer provides the following security measures for the calculator:
the manufacturer's warranty seal preventing access to the adjustment activation jumper (see Fig. 12.1.);
the manufacturer's warranty seal on the fastener of the cover protecting electronic module (see Fig. 12.1.).
The manufacturer provides the following security measures for the flow sensor:
the seals on the screws of protective cover of flow sensor (see Fig. 12.2. - Fig. 12.4.).
After installation of the meter the installer shall mount following seals:
butterfly, wire or lead seals to bind the lid and bottom part of the calculator enclosure (see Fig. 12.1.);

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seals on the pockets and mounting socket of the temperature sensors (see Fig. 12.6. and Fig. 12.7.);
additionally flow sensor's connection with the pipeline should be sealed as well (for example with couplings)
The meter must be sealed once it has been installed to prevent unauthorized dismantle, removal, or altering of device without evident damage
on the meter or its seals.
5. Installation
5.1. Basic requirements
The meter has been designed for operation in heating or heating and cooling systems. Pre-installation checks:
check if all parts listed in the meter's documentation are available,
check if there are no visible mechanical defects on device,
check if there are valid rating plate, undamaged manufacturer's warranty seals and required by certification authority labelling.
The flow direction shown by the arrow on the flow sensor body must match the actual flow in metering circuit. The heat meter must be installed
on the correct pipe (supply or return), as indicated by the icon (see Fig. 5.1.) placed on the rating plate on the meter enclosure
Fig. 5.1 Icons representing flow sensor installation place.
If the meter is designed for the supply-side installation, install the supply temperature sensor in the flow sensor body (for sizes DN15 to DN20)
or in a tee / ball valve mounted next to the flow sensor body (for sizes DN25 to DN100) and the return temperature sensor should be mounted
on the return pipe. If the meter is designed for the return-side installation, install the return temperature sensor in the flow sensor body (for sizes
DN15 to DN20) or in a tee / ball valve mounted next to the flow sensor body (for sizes DN25 to DN100) and the supply temperature sensor
should be mounted on the supply pipe.
Only qualified personnel may install the meter, following the requirements listed in this document, in technical documentation of other system
components and in meter installation project.
Do not place the meter's wiring / cables less than 5 cm away from power cables of other equipment. Do not change length of provided with the
meter cables in order to extend or reduce they lengths.
5.2. Electrical wiring
5.2.1. Temperature sensors connection
5.2.1.1. Factory-installed sensors
Do not reduce or extend the length of the wiring of the factory-installed temperature sensors. If the connection terminals inside the calculator
are accessible, installation cables can be temporarily disconnected from terminals and reconnected afterwards in exactly same order.
Before installation of the temperature sensor in a tee or ball valve, verify that accessories installation socket match the temperature sensor
depth and diameter (see the dimensions in Fig. 5.2.).
Caution: Using installation accessories that do not meet these requirements may damage the temperature sensor!
Installation of the directly mounted temperature sensor should be started from placing the o-ring on the tool tip of mounting aid and after that
with a rotary movement of the mounting aid insert o-ring in the installation socket of temperature sensor. Next adjust the o-ring into its final
positon by using the other end of the mounting aid. If the temperature sensors are delivered with plastic bolt then position the inner bar of the
half shell screwing into the surrounding crimp of the sensor enclosure and press two half shells firmly together. Thread the temperature sensor
into the seat with a wrench and tighten to 3-5 Nm (see Fig. 5.2.). When installation is finished seal the temperature sensor by passing the seal
wire through the drilling of the half shelf screwing and the installation fitting.
Caution: If the temperature sensor has been removed, always reinstall it with a new o-ring!
Fig. 5.2 Installation of the o-ring and the temperature sensor in a ball valve or a tee.
supply
return
ball
valve
o-ring
temperature
sensor
temperature
sensor
o-ring
tee