Landis+Gyr ULTRACOLD 2WR6 Series User manual

ULTRAHEAT®T350 (2WR6…)
ULTRACOLD®T350 (2WR6…)
Technical Description
32 14 101 001 b
Date: 19.03.2018
Landis+Gyr GmbH
Ultrasonic heat and cooling meter
T350 (2WR6…)
Residential and district heating

Outstanding features 2/21
Outstanding features
Meter for measurement of energy in a heating or cooling circuit with water using the ultrason-
ic principle.
Important properties are:
Measurement range of flow 1:100 acc. EN1434:2007, 1:500 total range
Overall length 110 mm / 130 mm / 190 mm
Suitable for small mounting locations due to compact construction
Construction for residential heating for 105 °C and for district heating for 130 °C
15 monthly values
Set day function
Non-volatile memory
Battery or mains operated
Resistant against pollution and soiling due to DuraSurface
Optional Pt500 temperature sensors
Optional fast temperature measurement interval
Optional M-Bus interface or pulse output

Contents 3/21
Contents
1General notes ____________________________________________________________4
Other available documents __________________________________________________4
2Safety information ________________________________________________________5
3Technical data ___________________________________________________________7
Dimensions ______________________________________________________________8
4Installation ______________________________________________________________9
Installation Notes__________________________________________________________9
Examples of installation_____________________________________________________9
Installation notes for sensor adapter set _______________________________________10
4.1 Installation for cooling metering ___________________________________________11
5Dimension of electronic unit_______________________________________________12
6Operating elements ______________________________________________________ 13
6.1 Displaying current meter status ___________________________________________13
User loop_______________________________________________________________14
Service loop_____________________________________________________________14
6.2 Previous years values __________________________________________________14
6.3 Monthly values ________________________________________________________14
7Resolution of the display__________________________________________________15
8Power supply ___________________________________________________________15
24 V safety extra-low voltage _______________________________________________15
9Communication _________________________________________________________16
Electronic unit interfaces___________________________________________________16
M-Bus _______________________________________________________________16
Pulse output ____________________________________________________________16
10 Error codes_____________________________________________________________17
11 Order codes (type number key) ____________________________________________ 18
12 Additional order information_______________________________________________19
13 Pressure loss ___________________________________________________________ 20

General notes 4/21
1 General notes
Note:In the following text, the term meter refers to heat meter and
cooling meter, unless they are otherwise differentiated.
Note: The meter cannot be opened without damaging the security
seal.
The meter is used to measure the consumption of heating or cooling energy in
systems operating with water.
The meter consists of a flow part, two temperature sensors and an electronic
unit that calculates the energy consumption from the volume and temperature
difference.
The meter combines modern microcomputer technology with innovative ultra-
sonic measurement technology in all-metal.
This technology is thus wear free, robust and largely maintenance free. High
precision and long-term stability guarantee precise and equitable cost ac-
counts.
Other available documents
Operating Instructions T350(2WR6…)
Installation Instructions T350(2WR6…)
Illustrated catalogue
Additional information is available on request.

Safety information 5/21
2 Safety information
The meter may only be used in building service engineer-
ing systems and only for the applications described.
The local regulations (installation etc.) must be adhered to.
Adhere to the operating conditions according to the dial
plate during use. Non-adherence can cause hazards and
the warranty will expire.
Adhere to the requirements regarding circulating water
(CEN / TR 16911:2016).
The meter is only suitable for circulating water in heating
systems.
The meter is not suitable for potable water.
Do not lift the meter by the electronic unit.
Be aware of sharp points on the thread, flange and meas-
uring tube.
Only personnel, trained in the installation and operation of
meters in heating and cooling systems, may install and
remove the meter.
Only install or remove the meter when the pipes are de-
pressurized.
After installing the meter, check the leak-tightness of the
system.
Warranty and calibration validity will lapse if the calibration
relevant security seal is broken.
Only clean the meter from outside with a soft, lightly wetted
cloth. Do not use any spirit or cleaning solvent.
As far as disposal is concerned, the meter is a waste elec-
tronic appliance in the sense of European Directive
2012/19/EU (WEEE) and it must not be disposed of as
domestic waste. The relevant national, legal regulations
must be observed as the appliance must be disposed of
via the channels provided for this purpose. The local and
currently valid legislation must be observed.
The meter contains lithium batteries. Do not dispose of the
meter and the batteries with domestic waste. Observe the
local stipulations and laws on disposal.

Safety information 6/21
You can return the lithium batteries to the manufacturer for
appropriate disposal after use. When shipping, please
observe legal regulations, in particular those governing the
labelling and packaging of hazardous goods.
Do not open the batteries. Do not bring batteries into con-
tact with water or expose to temperatures above 80 °C.
The meter does not have any lightning protection. Ensure
lightning protection via the in-house installation.

Technical data 7/21
3 Technical data
General
Measuring accuracy
Class 2 or 3 (EN 1434)
Environmental class
A (EN 1434) for indoor installation
Mechanical class
M1 *)
Electromagnetic class
E1 *)
*) according to 2014/32/EU Directive on Measuring Instruments
Ambient humidity
<93 % rel. humidity at 25 °C,
without condensation
Max. height
2000 m above sea level
Storage temperature
-20 … 60 °C
Electronic unit
Ambient temperature
5 … 55 °C
Housing protection rating
IP 54 according to EN 60529
Power supply
Battery for 6 or 11 years
or 24 V AC / DC external (optional)
Operation threshold for T
0.2 K
Temperature difference T
3 K … 80 K
Temperature measurement range
0 ... 150 °C
National type approvals may be different!
LCD
7 digit
Optical interface
Standard, EN 1434-3
Communication
Optional: M-Bus or pulse output
Protocol
IEC 870, 300 baud in Nb
Separability
Always detachable, cable length 1 m
Temperature sensor
Type
Pt 500 according to EN 60751
Connection type
2-wire technology, fixed connection
Cable length
1.5 m (optional 5 m)
Construction type
DS direct short, M10 × 27.5 mm or PS
pocket short ø 5.2 x 45 mm according
to EN 1434
Temperature range
5 ... 105 °C (PS pocket short);
5 …130 °C (DS direct short)
National type approvals may be different!
Volume measurement unit
Protection class
IP 54 / IP 65 according to EN 60529
Mounting place
Hot side / cold side
Installation position
Any
Flow straightening
None
Measuring range
Approved 1:100
Temperature range
5 … 130 °C
National type approvals may be different!
Maximum overload
qs = 2 × qp, permanent
Nominal pressure
PN16 (PS16), PN25

Technical data 8/21
Nominal flowrate
qp
Overall length
Connection
Maximum flowrate
qs
Minimum flowrate
qi
Response threshold
(variable)
Pressure loss at
qp
Kv flowrate at
Δp 1 bar
Kv flowrate at
Δp 100 mbar
Weight
m3/h
mm
G/DN
m3/h
l/h
l/h
mbar
m3/h
m3/h
kg
0.6
110
G 3/4
1.2
6
2.4
150
1.5
0.5
1
0.6
190
G1
1.2
6
2.4
150
1.5
0.5
1.5
1.5
110
G 3/4
3
15
6
150
3.9
1.2
1
1.5
130
G1
3
15
6
160
3.8
1.2
1.5
1.5
190
G1
3
15
6
160
3.8
1.2
1.5
2.5
130
G1
5
25
10
200
5.6
1.8
1.5
2.5
190
G1
5
25
10
200
5.6
1.8
1.5
Tolerance of pressure loss: +/- 5%
Dimensions
Fig. 1: Overview dimensions overall length 110 mm
Fig. 2: Overview dimensions overall length 130 mm
Fig. 3: Overview dimensions overall length 190 mm
Order-No.
qp
PN
a
b
m³/h
bar
mm
mm
2WR605
0.6
16
110
G ¾
2WR607
0.6
16
190
G1
2WR621
1.5
16
110
G ¾
2WR623
1.5
16
190
G 1
2WR636
2.5
16
130
G1
2WR638
2.5
16
190
G1

Installation 9/21
4 Installation
To install the meter proceed as follows:
Determine the place of installation according to the mark on the meter.
Note: For a heat meter the mounting place of the flow sensor cold
side is equivalent to return. The mounting place of the flow sensor
hot side is equivalent to flow.
Note: For a cooling meter the mounting place of the flow sensor
hot side is equivalent to the return. The mounting place of the flow
sensor cold side is equivalent to flow.
Observe the dimensions of the meter and check whether there is sufficient
space available.
Rinse the system thoroughly before installing the meter.
Fit the meter vertically or horizontally between 2 slide valves so that the ar-
row on the housing and the flow direction match. Also observe the installa-
tion situations and the following examples of installation.
Fit the temperature sensors in the same circuit as the meter.
Seal the temperature sensor and the fittings to protect against manipula-
tion.
If you install the meter for cooling metering, follow the appropriate notes.
Installation Notes Inlet or outlet sections are not necessary. If you install the meter in the com-
mon return of two circuits, choose a place of installation with a minimum dis-
tance of 10 × DN from the T-piece. This distance ensures a good thorough
mixing of the different water temperatures. You can install the temperature
sensors in T-pieces, ball valves, directly immersed or in pockets depending on
the version. The temperature sensor ends must reach to at least the middle of
the pipe cross section.
Note: During installation it must be ensured that no water can
enter the electronic unit during operation.
Examples of installation
T-piece
Fig. 4: Example of integration with T-piece and meter with 110 mm fitting

Installation 10/21
Ball valve
Fig. 5: Example of integration with ball valve and meter with 190 mm fitting
Fig. 6: Installation for circulation with admixing; placement of temperature sensors
Fig. 7: Installation for circulation with throttling configuration (flow sensor in flow direction before control
valve / differential pressure regulating valve)
Installation notes for sensor adapter set
A mounting set is included for meters with Ø 5.2 × 45 mm temperature sen-
sors. With this you can fit the temperature sensor directly immersed into an in-
sert or a ball valve for example.
1. Install with the O-ring at the point of installation with the fit-up aid / pen pro-
vided.
2. Place both halves of the plastic bolting round the 3 notches of the tempera-
ture sensor.
3. Press the bolting together and screw the bolting hand tight into the point of
installation until it comes to a stop (tightening torque 3 ... 5 Nm).
Fig. 8: Mounting adapter set

Installation 11/21
4.1 Installation for cooling metering
Note: The local regulations (installation etc.) must be adhered to.
When installing as a cooling meter it is essential that the black cover on the
measuring tube is pointed to the side or down-wards in order to avoid prob-
lems with condensation. Fit the immersion sleeves so that the temperature
sensor is positioned vertically downwards or horizontally.
Note: Always install the volume measurement unit on the hot side.
Fit the electronic unit separate to the volume measurement tube, e.g. on the
wall. Make a loop downwards in order to prevent condensation running along
the connected lines into the electronic unit.
Transducer cover
Fig. 9: Recommended installation position for cooling metering

Dimension of electronic unit 12/21
5 Dimension of electronic unit
Fig. 10: Dimensions of electronic unit
Fig. 11: Wall adapter (view from above and side)

Operating elements 13/21
6 Operating elements
Fig. 12: Operating elements
No.
Name
Description
Note
1
Button
Switches to the next
loop and display value
within a loop.
To switch between the
displayed values: press
the button shortly (approx.
3 s);
To switch between the
loops: press the button
longer (approx. 10 s)
2
Optical interface
Allows data communi-
cation with a computer
with the necessary
service software.
3
Calibration rele-
vant security seal
6.1 Displaying current meter status
The meter displays the current meter status in kWh, MWh, MJ or GJ.
Note: In order to prevent reading errors, the decimal places of the
values displayed are marked with a frame.
Note: Both display range and data displayed can differ from the
description depending on the appliance parameterization. Certain
button functions can also be blocked.
1
2
3

Operating elements 14/21
User loop
User loop
Display type ▼
0054567
kWh
Energy quantity
00065.43
m³
Volume
888888
kWh
Segment test
Info
F - - -
In case of error: message with error
code
Info
Service loop
Service loop
Display type ▼
0.534
m³/h
Current flow
22.9
kW
Current power
84 47
°C
Current temperature hot side / cold
side
04.06.11
D
Date
786
Bh
Operating hours
56
Fh
Missing hours
3792701
G
Device number, 7 digit
Info
PulSE
CH
Remote read out mode (optional)
Info
123
A
Primary address for M-Bus option
Info
2345678
K
Property number, 7 digit
Info
18.02.11
F0
Date stamp for F0 early warning
Info
3- 01
FW
Firmware version
Info
31.12.10
V
Storage day previous year
Previous year
0034321
kWh
Energy previous year on set day
Previous year
00923.12
m³
Volumes: previous year on set day
Previous year
12
Fh
Missing hours previous year
Previous year
- -.- -.- -
C
Code input for parameterization
01.06.11
M
Storage day month 1-15
Previous month
over 3s button press:
0034321
kWh
Energy previous month on refer-
ence date
Previous month
00923.12
m³
Volume previous month on refer-
ence date
Previous month
12
Fh
Missing hours previous month on
reference date
Previous month
6.2 Previous years values
The meter saves the following values on the yearly set day (parameterizable)
Energy (meter status)
Volume (meter status)
Missing time (meter status)
6.3 Monthly values
The meter stores the following values for 15 months on the monthly set day
Energy (meter status)
Volume (meter status)
Missing time (meter status)
You can also read the monthly values via the optical interface.

Resolution of the display 15/21
Note: Central European Time (CET) applies as the standard time.
During daylight saving time the storage takes place at the corre-
sponding times.
7 Resolution of the display
kWh
without decimal place
MWh
3 decimal places
MJ
without decimal place
GJ
3 decimal places
m³/h
0.001
m³
0.01
8 Power supply
The meter can be supplied with power by a battery or by a power supply mod-
ules as preferred.
Options:
6 years battery
11 years battery
Power supply 24 V AC / DC
24 V safety extra-low voltage
Voltage
12...36 V AC or 12…42 V DC
Frequency
50 / 60 Hz or DC
Galvanic isolation
1000 V DC
Power input
max. 0.8 VA
Connection
cable 1.5 m pre-assembled: PVC,
LIYY 2 x 0.25 mm2 tin-coated, ex-
ternal diameter 3.6 mm)
Connection in combination with M-Bus
or pulse output
cable 1.5 m pre-assembled: PVC,
LIYY 4 x 0.25 mm2 tin-coated, ex-
ternal diameter 4.2 mm)

Communication 16/21
9 Communication
Electronic unit interfaces
The meter is equipped with an optical interface with M-Bus protocol as stand-
ard.
One of the following options can be ordered for remote readout.
M-Bus
Standard, protocol
EN 1434-3; EN 13757-2,
EN 13757-3
Galvanic isolation (between meter and
module)
yes
Polarity
any
Voltage
max. 50 V DC
Current
1.3 M-Bus loads
Addressing
primary or secondary
Baud rate
300, 2400 baud
Technical document
TKB 3427
Connection
cable 1.5 m pre-assembled: PVC,
LIYY 2 x 0.25 mm2 tin-coated, ex-
ternal diameter 3.6 mm
Note: When reading via M-Bus, the permissible average reading
frequency must not be exceeded (1 × every 3 h at 2400 baud,
1 × every 24 h at 300 baud). A read-out with a higher frequency is
not permitted and it could lead to incorrect functioning of the meter.
Pulse output
Type
open collector
Galvanic isolation (between meter
and module)
yes
Polarity
observe
Voltage
max. 30 V
Current
max. 30 mA
Dielectric strength
500 Veff against ground
Classification
OB (acc. to EN 1434-2)
Voltage drop
ca. 1.3 V at 20 mA
Connection
cable 1.5 m pre-assembled: PVC,
LIYY 2 x 0.25 mm2 tin-coated, external
diameter 3.6 mm)

Error codes 17/21
10 Error codes
The meter continuously runs a self-diagnosis and can thus recognize and dis-
play various installation or error messages.
Error
code
Error
Service guidelines
FL
neG
Incorrect flow direction
Check flow or installation direction;
correct if necessary
if applicable alternating with:
DIFF
nEG
Negative temperature dif-
ference
Check installation point of the tem-
perature sensors; exchange if nec-
essary
if necessary in exchange with:
F0
No flow can be measured
Air in the measurement unit bleed air
from line (delivery condition)
F1
Interruption in the hot side
temperature sensor
Exchange the meter
F2
Interruption in the cold side
temperature sensor
Exchange the meter
F3
Electronics for temperature
evaluation defective
Exchange the meter
F4
Problem with the power
supply; battery flat;
Exchange the meter
F5
Short-circuit hot side tem-
perature sensor
Exchange the meter
F6
Short-circuit cold side tem-
perature sensor
Exchange the meter
F7
Fault in internal memory
Exchange the meter
F8
Errors F1, F2, F3, F5 or F6
for longer than 8 hours,
recognition of attempts to
manipulate. No further
measurements are carried
out.
Measure dependent on error code.
Error message F8 must be reset by
service department.
F9
Fault in the electronics
Exchange the meter

Order codes (type number key) 18/21
11 Order codes (type number key)
Order codes for label plate data
Nominal flow rate
Code
Nominal flow rate 0.6 m³/h, length 110 mm, nominal
pressure PN16, connection G ¾ B
05
Nominal flow rate 0.6 m³/h, length 190 mm, nominal
pressure PN16, connection G 1 B
07
Nominal flow rate 1.5 m³/h, length 110 mm, nominal
pressure PN16, connection G ¾ B
21
Nominal flow rate 1.5 m³/h, length 110 mm, nominal
pressure PN25, connection G ¾ B
22
Nominal flow rate 1.5 m³/h, length 190 mm, nominal
pressure PN16, connection G 1 B
23
Nominal flow rate 2.5 m³/h, length 130 mm, nominal
pressure PN16, connection G 1 B
36
Nominal flow rate 2.5 m³/h, length 190 mm, nominal
pressure PN16, connection G 1 B
38
Type of meter and mounting location
Code
Mounting place cold side, temperature sensor cold
side directly integrated into the volume measurement
unit
1
Mounting place hot side, temperature sensor hot side
directly integrated into the volume measurement unit
4
Temperature sensor type
Code
Temperature sensor Pt500, not removable, directly in
water, type DS, M10x1 / immersion length 27.5 mm,
cable length 1.5 m
7B
Temperature sensor Pt500, not removable, directly in
water, type DS, M10x1 / immersion length 27.5 mm,
cable length 5 m
7C
Temperature sensor Pt500, not removable, directly in
water or for protection pocket, Ø5.2x45 mm, cable
length 1.5 m
7H
Temperature sensor Pt500, not removable, directly in
water or for protection pocket, Ø5.2x45 mm, cable
length 5 m
7J
Control cable / type / electronic unit
Code
Split version with 1 m control cable
B
Power supply
Code
Battery for 11 years (C-cell)
3
Standard battery for 6 years (2xAA cells)
7
Power supply 24 V AC / DC with connecting terminals
K
Communication
Code
Without communication interface
0
With pulse output
1
With M-Bus
5
Manufacturer’s label
Code
Logo Landis+Gyr
00
Other labels on request
xx
County / where used
Code
Dial plate for Austria (German)
D
Dial plate for Bulgaria (Bulgarian)
L
Dial plate for Switzerland (German/French)
B
Dial plate for China (Chinese)
P
Dial plate for Czech Republic (Czech)
G
Dial plate for Germany (German)
A
Dial plate for Denmark (Danish)
F
Dial plate English neutral
T
Dial plate for Croatia (Croatian)
K
Dial plate for Hungary (Hungarian)
J
Dial plate for Iceland (Icelandic)
M
Dial plate for Italy (Italian)
Q
Dial plate for Japan (Japanese)
W
Dial plate for Luxembourg (German/French)
V
Dial plate for Mongolia (Mongolian)
S
Dial plate for the Netherlands (Dutch)
E
Dial plate for Poland (Polish)
H
Dial plate for Romania (Romanian)
R
Dial plate for Sweden (Swedish)
C
Dial plate for Slovak Republic (Slovakian)
U
Dial plate for Ukraine (Ukrainian)
N
Dial plate for Belgium (French/Flemish)
Z*
Dial plate for Kazakhstan (Russian)
Z*
Dial plate for Belarus (Russian)
Z*
Dial plate for Bosnia-Herzegovina (Croatian)
Z*
Dial plate for Lithuania (English)
Z*
Dial plate for Slovenia (Slovenian)
Z*
Dial plate for Armenia (Armenian)
Z*
Dial plate for Russia (Russian)
Z*
Dial plate for Uzbekistan (Russian)
Z*
Dial plate for France (French)
Z*
Dial plate for Middle East (English)
Z*
Dial plate for Australia (English)
Z*
Dial plate for Moldova (Rumanian)
Z*
Dial plate for Spain (Spanish)
Z*
Dial plate for Serbia (Serbian)
Z*
Energy unit
Code
Display: kWh
A
Display: MWh with 3 decimal places
B
Display: MJ
C
Display: GJ with 3 decimal places
D
Calibration / conformity
Code
Tested according to EN 1434, class 3, with lock mark
2
Compliant with EN 1434, class 3 *)
3
Tested according to EN 1434, class 2, with lock mark
4
Compliant to MID class 2
S
Compliant to MID class 3
R
*) Calibrated devices are offered accordingly to the
current approvals.

Additional order information 19/21
12 Additional order information
Needed additional information in the order:
Condition in
the MLFB
Meaning
Addi-
tional
order
infor-
mation
11. digit is not
3
Measuring interval for the
temperature measurement is
8 s instead of 60 s
IT 08
12. digit is 1
Pulses for volume (only with
the option pulse output)
KV
14. digit is Z
Dial plate for Belgium
(French / Flemish)
P1A
14. digit is Z
Dial plate for Kazakhstan
(Russian)
P3A
14. digit is Z
Dial plate for Belarus
(Russian)
P4A
14. digit is Z
Dial plate for Lithuania
(English)
P7A
14. digit is Z
Dial plate for Armenia
(Armenian)
P5B
14. digit is Z
Dial plate for Russia
(Russian)
P7B
14. digit is Z
Dial plate for Uzbekistan
(Russian)
P8B
14. digit is Z
Dial plate for France
(French)
P2C
14. digit is Z
Dial plate for Middle East
(English)
P4C
14. digit is Z
Dial plate for Australia
(English)
P5C
14. digit is Z
Dial plate for Moldavia
(Romanian)
P6C
14. digit is Z
Dial plate for Spain
(Spanish)
P7C
14. digit is Z
Dial plate for Serbia
(Serbian)
P8C
Cooling meter; Medium water
K00
Example:
2WR6051-7BB71-0ZB2 + P3A + IT08 + KV
05 = Nominal flow rate 0,6 m³/h, length 190
mm, nominal pressure PN16, Anschluss
connection 1"
1 = Installation cold side, temperature sensors
cold side directly integrated in the volume
measurement unit
7B = Temperature sensor Pt500, not remova-
ble, directly in water, type DS, M10x1 /
immersion length 27,5 mm, cable length
1,5 m
B = Split version with 1 m control cable
7 = Standard battery for 6 years (2xAA cells)
1 = With pulse output
0 = Company brand Landis+Gyr
Z = Dial plate for Kazakhstan (Russian)
B = Display: MWh with 3 decimal places
2 = Certified acc. EN 1434 class 3, with secu-
rity seal
P3A = Dial plate for Kazakhstan
IT08 = Measuring interval for the temperature
measurement is 8 s instead of 60 s
KV = Pulses for volume

Pressure loss 20/21
13 Pressure loss
Nominal flowrate
qp
Overall
length
Connection
Pressure
loss at qp
Kv-Factor
at Δp 1 bar
Graph in
diagram
m3/h
mm
G / DN
mbar
m3/h
0.6
110, 190
G3/4
150
1.5
A
1.5
130, 190
G1
160
3.8
B
1.5
110
G 3/4
150
3.9
C
2.5
190
G1
210
5.3
D
2.5
130
G1
200
5.6
E
The indicated pressure loss of a flow sensor is at nominal flowrate qp.
With the Kv-Factor, which defines the flow rate at a pressure loss of 1 bar,
the pressure loss at any given flow rate can be calculated:
  

  
  
   
Alternatively, the value can be taken from the diagram.
250
10
100
1000
0,1 1 10
pressure drop in mbar
flow rate in m³/h
21.02.2017
A B C D E