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