Siemens WFM407 series User manual

CE1N5331en
03.11.2005
Building Technologies
HVAC Products
5331
Siemeca™
Electronic
Heat Meter WFM407…
WFQ407…
WFP407…
WFO407…
Electronic, battery-supplied meters for determining the heat consumption in
autonomous heating and service water systems.
Saving and displaying of cumulative values on a selectable due date. Available
as compact single-jet meter with nominal flow of 0.6 m3/h, 1.5 m3/h and 2.5 m3/h.
The electronic SiemecaTM heat meter can be read out and parameterized via an
IrDa interface.
Application
The heat meter is used for measuring heat energy. The major areas of application are
heating systems with central heating facilities in which the heating energy is supplied to
several consumers as required.
This is useful in:
•Apartment buildings
•Offices and administration buildings
Typical users are:
•Private building owners
•Residential building cooperatives
•Facility management providers
•Real estate management

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Functions
•Determination of heat consumption based on the measurement of flow and differ-
ence in temperature
•Cumulation of consumption values
•Saving of cumulative consumption values on the due date
•Display of consumption values and optional of significant operating data
•Self-monitoring with error indication
•Parameterisation and read out via optical interface (IrDA-compatible)
Type overview
Type list – heat meters
Place of installation: Return
Nominal Flow qpInstallation
Length Cable Length Immersed Return Sensor Place of
Installation Type Ref.*
0.6 m3/h 110 mm 1.5 m Direct Integrated Return WFM407.B113
1.5 m3/h 110 mm 1.5 m Direct Integrated Return WFM407.D113
2.5 m3/h 130 mm 1.5 m Direct Integrated Return WFM407.E133
1.5 m³/h 80 mm 1.5 m Direct Not integrated Return WFQ407.D083
0.6 m3/h 110 mm 1.5 m Indirect Integrated Return WFM407.B119
1.5 m3/h 110 mm 1.5 m Indirect Integrated Return WFM407.D119
2.5 m3/h 130 mm 1.5 m Indirect Integrated Return WFM407.E139
Place of installation: Inlet
Nominal Flow qpInstallation
Length Cable Length Immersed Flow Sensor Place of
Installation Type Ref.*
0.6 m3/h 110 mm 1.5 m Direct Integrated Flow WFP407.B113
1.5 m3/h 110 mm 1.5 m Direct Integrated Flow WFP407.D113
2.5 m3/h 130 mm 1.5 m Direct Integrated Flow WFP407.E133
1.5 m³/h 80 mm 1.5 m Direct Not Integrated Flow WFO407.D083
0.6 m3/h 110 mm 1.5 m Indirect Integrated Flow WFP407.B119
1.5 m3/h 110 mm 1.5 m Indirect Integrated Flow WFP407.D119
2.5 m3/h 130 mm 1.5 m Indirect Integrated Flow WFP407.E139
* Reference code
Scope of delivery – heat meter
Temperature sensor, length and type of immersion
Article 80 mm 110 mm, direct 110 mm, indirect 130 mm, direct 130 mm, indirect Packing
Compact heat meter •••••Box
Protective cap 2x 2x 2x 2x 2x Box
Installation manual •••••Box
Start-up and operating instructions •••••Box
Flat seal 2x 2x 2x 2x 2x Bag 1
Seal wire 3x 2x 2x 2x 2x Bag 1
Self lock seal 3x 2x 2x 2x 2x Bag 1
Plastic screw for fixing temp. sensors 2x 1x 1x 1x 1x Bag 2
Sealing ring 4x 2x 2x 2x 2x Bag 2
Tool for assembly temperature sensors •••••Bag 2

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Type list – Installation kits
Scope of delivery, description Type Ref.
For 80 mm installation length, both sensors directly immersed, flow sensor in ball valve WFZ.E80
For 80 mm installation length, return sensor directly immersed, flow sensor in ball valve WFZ.E80G3
For 110 mm installation length, return sensor directly immersed, flow sensor in ball valve WFZ.E110-I
For 110 mm installation length, return sensor indirectly immersed, flow sensor in immersion
sleeve
WFZ.E110-IT
For 110 mm installation length, return sensor directly immersed, flow sensor in ball valve WFZ.E110G3-I
For 110 mm installation length, return sensor indirectly immersed, flow sensor in immersion
sleeve
WFZ.E110G3-IT
For 130 mm installation length, return sensor directly immersed, flow sensor in ball valve WFZ.E130-I
For 130 mm installation length, return sensor indirectly immersed, flow sensor in immersion
sleeve
WFZ.E130-IT
For 130 mm installation length, return sensor directly immersed, flow sensor in ball valve WFZ.E130G1-I
For 130 mm installation length, return sensor indirectly immersed, flow sensor in immersion
sleeve
WFZ.E130G1-IT
Scope of delivery – installation sets
WFZ-
Accessories E80 E80G3 E110-I E110-IT E110G3-I E110G3-IT E130-I E130-IT E130G1-I E130G1-IT
Spacer ••••••••••
Ball valve IT* ½” for installation in
return, union nut** ¾”, with sensor
seat, flat seal ¾”
••
Ball valve IT ½” for installation in
return, union nut* ¾”, flat seal ¾” ••2x 2x 2x 2x
Ball valve IT ¾” for installation in
return, screw connection ¾” with 1”
union nut, flat seal 1”
2x 2x 2x 2x
Ball valve IT ½” for installation in
flow, with sensor seat ••
Ball valve IT ¾” for installation in
flow, with sensor seat •••
Ball valve IT1” for installation in
flow, with sensor seat •
Tee IT ½” for installation in flow •
Tee IT ¾” for installation in flow ••
Tee IT1” for installation in flow •
Immersion sleeve M10x1 ••••
* IT = Internal thread
** Union nut integrated in ball valve (cannot be separated)

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Type list – Accessories
Accessories Description, scope of delivery Type Ref.
Spacer For installation length of 80 mm, external thread ¾” WFZ.R80
Spacer For installation length of 110 mm, external thread ¾” WFZ.R110
Spacer For installation length of 130 mm, external thread 1” WFZ.R130
Ball valve Internal thread ½”, with sensor seat WFZ.K15
Ball valve Internal thread ¾”, with sensor seat WFZ.K18
Ball valve Internal thread 1”, with sensor seat WFZ.K22
Tee Internal thread ½”, with immersion sleeve M10×1 WFZ.T16
Tee Internal thread ¾”, with immersion sleeve M10×1 WFZ.T19
Tee Internal thread 1”, with immersion sleeve M10×1 WFZ.T22
Threaded joints Profipress G-Adapter with SC-Contur, gunmetal, female thread, 15× ½” WFZ.P2
Threaded joints Profipress G-Adapter with SC-Contur, gunmetal, female thread, 18× ¾” WFZ.P2-1
Parameterisation and
diagnosis tool
PC-software tool (additional tool required: with USB-Tool set
WHZ3.USB or IrDA interface F12150-2018 on Com (RS232) port)
ACT20
Order
When ordering, specify the type reference according to the type overview. The stan-
dard electronic SiemecaTM heat meter has an IrDA interface.
If a due date other than the 31 December is desired, the desired month should also be
entered in addition to the type reference (the last day of a month is always the due
date).
Order model for a heat meter with 110 mm installation length and 30 April as due date:
WFM407.B113, Due date: April
Technology
The meter operates according to the single-jet measuring principle. The water flows
against an impeller; its speed is scanned electronically and without a magnetic field.
The temperatures in the flow and return are measured with immersion sensors Pt1000
(platinum measuring elements).
The heat meter is equipped either for installing in the return or in the flow. Please select
the corresponding meter from the type list for the place of installation.
The flow is continuously measured in the calculator and at least once every minute the
flow and return temperature. A microprocessor in the calculator determines the differ-
ence in temperature and calculates the consumed quantity of heat based on the aver-
age flow and the heat coefficient.
The heat consumption values are totalled continuously. The current state is saved on
the next due date at 24.00 h.
The due date can be factory-programmed; the standard due date is entered as
31 December (compare «Order»)
When the annual consumption is saved, the heat meter simultaneously calculates a
control number. After special parameterisation with ACT20 service software the check-
sum is readable. Self-readers must inform the utility company/property management of
this control number and the due date value that has been read out so that they can
check that the display has been read correctly.
The due date value remains saved for one year.
Measuring principle
Determination of heat
consumption
Saving of consump-
tion values

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The heat meter has a scrolling display with the following values and variables:
•Cumulative heat consumption since starting up the heat meter
•Segment test
•Due date
•Cumulative water consumption up to last due date
With the aid of the SiemecaTM parameterization tools the following display options can
be activated:
•Due date (only if due date and cut off date are different)
•Control number
•Current flow
•temperature Difference
•Error display (see also following section)
The heat meter is self-monitoring and can display errors that have been detected. The
cumulative values remain saved until the error occurs for the first time.
Version
The heat meter comprises the flow meter, the calculator and both temperature sensors.
The flow meter is screw connected to the pipe; it is made of brass and contains the
metering chamber with the single-jet impeller sensor. The inlet connection has a filter to
trap large dirt particles.
The heat meter is a compact version.
The calculator contains the electronics and the 8-digit display (LCD). The operating
voltage of DC 3 V is supplied by a lithium battery. The IrDA interface for automatically
reading out the readings is located beneath the display. The calculator on the flow me-
ter can be rotated 360°.
The temperature sensors can be installed either indirectly or directly immersed.
The sensor comprises the protection sleeve at the end of which is the measuring ele-
ment Pt 1000 and the PVC cable that connects it (fixed) to the calculator.
The temperature sensors are mounted in the ball valves with the temperature sensor
seat either (directly immersed) or in Tee with immersion sleeves (indirectly immersed).
Mounted (fixed), approved, pairs of and certified temperature sensors are used.
Display
Error messages
Calculator
Temperature sensor

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Determination of pressure loss
∆
0,5
0,4
0,3
0,2
0,1
0,05
0,04
0,03
0,02
0,01
1,0
0,2 0,3 0,4 0,5 1,0 1,5 2345Q
p
5333D01
0,6 1,2 2,5 6
Qp0,6 m3/h Qp2,5 m3/h
Qp1,5 m3/h
Pressure loss curve
∆p Pressure loss in bar
Q Flow in m3/h
Mounting instructions
•Observe the local regulations for the use of heat meters (mounting, sealing, opera-
tion, etc.).
•Mount the heat meter according to the type either in the flow or return between two
shut-off valves. It must be easily accessible for reading and service work.
•A stilling channel is required at the inlet in front of the device:
−150 mm for installation lengths of 80 mm and 110 mm
−200 mm for an installation length of 130 mm
•If the device is only to be used when starting up, the spacer can be mounted first.
•Before installing the meter, rinse the pipe well; mount the spacer for this purpose.
•When installing, observe the flow sign – an arrow on the flow meter.
•If tees of a different brand are used, ensure that they comply with the standard
EN1434!
•Position the calculator so that the display is easy to read.
•After mounting, test the system for pressure.
•Protect the calculator, both temperature sensors and the screw pipe connections
with seals against unauthorized access.
•Insulate the lead at the installation site of the temperature sensors.
Operating hint
•Observe the local regulations for recalibration purposes.

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Technical data
Metrological accuracy class 3 as per EN 1434
ratio qs/ qp = 2 : 1
ratio qp/ qi = 25 : 1 vertical
ratio qp/ qi = 50 : 1 horizontal
Environmental class A as per EN 1434
Energy unit
Standard
On request
kWh
GJ
Flow values
Minimum flow qi
Horizontal
Vertical
Nominal flow qp
Maximum flow qs
Starting value – horizontal
0.6 m3/h 1.5 m3/h 2.5 m3/h
12 l/h 30 l/h 50 l/h
24 l/h 60 l/h 100 l/h
600 l/h 1500 l/h 2500 l/h
1200 l/h 3000 l/h 5000 l/h
4 l/h 10 l/h 16 l/h
Upper limit of thermal power PS0.6 m3/h 1.5 m3/h 2.5 m3/h
125 kW 313 kW 523 kW
Quality of heating water VDI guide line 2035
(VDI – union of german engineers)
Max. permissible operating pressure 10 bar
Range of use – flow meter 15… 90 °C
Temperature measurement
temperature range of sensor
temperature difference
15…105 °C
3…90 K
Behaviour of flow
Flow ≤2,1 ×* qp
Flow > 2,1 × qp
Linear
Constant
Permissible ambient temperature
Transport and storage
Operation
–20 °C .. +70 °C
+5 °C .. +55 °C
Battery life time 10 years + ½ years
Connection sizes and mass
threaded end connections
Installation length
Mass
0.6 m3/h 1.5 m3/h 1.5 m3/h 2.5 m3/h
G¾B G¾B G¾B G1B
110 mm 80 mm 110 mm 130 mm
0,620 kg 0,565 kg 0,604 kg 0,686 kg
Temperature sensor
Temperature sensing element
Temperature probe type
Response time τ0,5
Diameter of protective sheath
Connecting lead
Pt 1000 as per EN 60751
Short DS
≤3.5 s
5 mm
1.5 m
Standards, CE EN 61000-4-3:2002+A1:2002
DIN EN 61000-4-Parts 2, 4, 8
DIN EN 55022
DIN EN 1434, (1997, 2002)

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Dimensional drawings
Installation length
80 mm
Installation length
110 mm
Installation length 130 mm
This Data Sheet only contains general descriptions and technical features which, in the case of specific applica-
tions, may not necessarily apply, or which may change due to further development of the product. Technical
details and features are binding only if explicitly agreed upon at the time of contract closure.
©2005 Siemens Building Technologies
Subject to alterations