Meters and Energy Cost Allocation Ultrasonic heat and cooling energy meters UH50.. Ultrasonic heating and cooling energy meters to measure flow and energy in hydronic heating or refrigerant circuits.
Use The UH50.. heating and cooling energy meter physically acquires energy consumption. The amount of heating or cooling energy is acquired separately and can be read out either on site or from a remote location. The device consists of a flow measuring section and processor unit. The processor unit can be equipped with different sensors, different types of power supply and communication modules. The UH50.. is used to measure the consumption of heat in district heating systems and blocks of flats.
Technical design Metering accuracy as per EN 1434 The diagram below shows the typical metering accuracy of the UH50.., compared to the error limits per EN 1434, class 2. Error limit per EN 1434 10 8 Relative errors [%] 6 4 2 0 -2 -4 -6 -8 -10 1 100 10 Flow [%/qp] Key: EN 1434, class 3 EN 1434, class 2 UH50.. typical (EN 1434, ½ class 2) The pressure loss in a flow sensor is indicated as nominal flow qp.
Nominal flow Mounting qp length 3 m /h mm Connecting thread Pressure loss at qp mbar Kv value at Δp = 1 bar m3/h Curve in the diagram 6 15 G1¼ 190 14 G 6 260 G1¼, DN25 140 16 H 10 200, 300 G 2, DN40 130 28 I 10 300 G2 110 30 J 15 270 DN50 110 45 K 15 200 DN50 95 49 L 25 300 DN65 105 77 M 40 300 DN80 160 100 N 60 360 DN100 115 177 O 150 500 DN150 120 433 P The value can also be read graphically using the diagram as an alternative.
324D03 Display The meter displays current readings in kWh, MWh, MJ or GJ. You can only select between kWh or MWh and MJ or GJ on the meter. *) Decimal places "flashing", "static", or "suppressed" The decimal places of displayed values are rounded off to avoid errors. Calibrated values are identified by a star symbol. 2 1 1 Decimal places outlined 2 Calibrated value The number of decimal places of a value depends on the selected measuring path and the selected unit.
A short press on button 1 enables selection of the required loop. The user loop reappears after the last loop. Press button 2 to read the value on the respective loop. The first value reappears after the last loop. NOTICE The range of display and the displayed data may deviate from this description and certain button functions may be disabled, depending on the parameter settings on the meter.
Service loop LOOP 3 Monthly value (set day) Energy on set day Tariff register 1 on set day Volume on set day Max. flow rate on set day, at 2-second intervals with date stamp Max. power on set day, at 2-second intervals with date stamp Max. temperatures on set day, at 2-second intervals with date stamp, for temperature heat or cold side Missing time count on set day NOTICE Changing the number of months to be read via the service software impacts the number of months that can be called up via the LCD.
Previous year’s values The electronics unit stores the meter readings for energy, volume, tariff register, missing time, and flow measuring time as well as the current maximum values of flow rate, power, temperature differential, temperature heat and cold side with their date stamps on a yearly set day.
Error code Error Notes on service F7 Fault in the internal memory Replace meter F8 Errors F1, F2, F3, F5, or F6 Action is based on the error code. Service must reset pending for more than 8 hours, detection of tampering error message F8 attempts. No further measurements are made F9 Error in the electronics Replace meter Standard parameters The UH50.. comes programmed as follows: ● Set day [TT.MM]: 01.01 Power supply The UH50.. can be powered by a power supply or battery.
Battery life Battery life depends on the type of battery and requirements (e.g. short timebase, analog module, etc.). NOTICE Install only batteries approved by the manufacturer. Requirements (with timebase Q = 4 s and T = 30 s) 6 years 11 years 16 years Power pack AC 110/230 V; AC / DC 24 V 2x AA cell C D Yes RF module 868 MHz (stationary, 15 sec. transmission interval) LoRaWAN module (Transmission interval 160 min.) D D D Yes RF module 868 MHz (mobile, 16 sec.
Communication Communication module The communication modules are connected via a 6-pole reaction-free plug, enabling them to be installed or replaced at any time. Compliance with ESD regulations must be ensured. 1 2 1 Module 1 2 Module 2 The UH50.. meters are equipped with an optical interface as standard.
Permissible module combinations AM Analog module MB G4 M-bus module MB MI M-bus module RF RF module GPRS GPRS module BACnet BACnet module Modbus Modbus module Step 1: Slot for module 2 is equipped with... AM (3) Step 2: Slot for module #1 can be equipped with...
The exterior diameter must be between 4 and 6 mm. All wiring must be able to be guided to the meter through the existing bushings. It may be convenient to connect the cables before the meter in a single multi-conductor cable on a split box. Do not connect shielded cables to the side of the meter (connect to one end only). Pulse module WZU-P2 Function description The pulse module WZU-P2 enables the meter to communicate with a pulse collector to transmit measured values.
Pulse for operating states "Ready" Pulsed "conducting", i.e. 0.1…0.25 ms pulse duration, 500 ms period "Fault" Constant "non-conducting" Fast pulses Applications, such as controllers or flow measuring sections, require higher pulse rates. The service software configures the parameters required for this purpose (pulse valency, pulse duration). The maximum pulse frequency is 33 Hz.
M-Bus modules WZU-MB G4 WZU-MI Function description The M-bus modules (WZU-MB G4 and WZU-MI) are used by the meter to communicate with an M-bus central unit to transmit measured values. With the 2 M-bus modules, the secondary address is identical for both modules. It can be adjusted on the device using the module on slot 1 or via M-bus. The data on the M-bus module is refreshed every 15 minutes. A shorter sampling cycle can be set using the UltraAssist software.
In addition to the M-bus connection facility, the WZU-MI module has 2 pulse inputs to connect metering pulses from hot and cold water meters with Reed contact, relay or open collector. The cumulated volume is calculated based on the pulses and the set pulse valency, stored in the processor unit at 5-minute intervals and passed on via M-bus. NOTICE The volume values calculated by the meter from the pulse inputs cannot be officially calibrated.
Analog module WZU-AM Function description The analog module (WZU-AM) converts the measured value from the meter to an analog signal. Each module has 2 channels with functions that can be configured independently. The service software configures the unit (selection of measured value and output range). The output signal is refreshed at 4-second intervals. NOTICE The analog module can be plugged into either of the 2 slots and 2 modules can be used concurrently.
NOTICE The module must be plugged into slot 2. The module is available in 2 different versions: WZU-RF Module with internal antenna WZU-RF-EXT Module with external antenna Data output conforming to OMS The following data is available: ● Current energy ● Current volume ● Current power ● Current flow rate ● Current temperatures heat and cold side ● Error (manufacturer-specific) ● Current time stamp (type I) Other data telegrams are available on request (e.g. special telegrams for mobile data acquisition).
At a transmission interval of 60 minutes, a battery life of 11 years can be achieved; at a transmission interval of 160 minutes, up to 16 years at good transmission quality. NOTICE The module must be plugged into slot 2. GPRS module WZU-GPRS Function description The module (WZU-GPRS) is a GSM/GPRS module with M-bus master. The module reads the values of the meter that support the M-bus protocol and stores the data. It is supplied complete with an external antenna.
Power supply The module (WZU-GPRS) is supplied complete with the required power supply module (rated voltage AC 100…240 V or AC/DC 24 V).
Tariff control via M-bus (tariff T11) In tariff registers 1, 2 and 3, either energy or volume can be totaled. With the relevant M-bus command, one of the 3 tariffs can be activated or all tariffs can be deactivated. Surcharge quantity tariff by means of return temperature (tariff T12) The energy is totaled based on the temperature cold side in tariff registers 1 or 2.
For tariffs T2, T3, T4, T5, T6, T10, T11, and T12 Tariff register 1 Tariff register 2 Tariff register 3 (not for T12) For tariff T7 For tariff T8 For tariff T9 Log functions In the internal logbook, meteorologically relevant events (errors, states, actions) are stored in chronological order with the time of occurrence. The acquired events are predefined. Logbook data cannot be deleted. Each event is stored in a separate 4-level shift register; the overflows are transferred to a 25level circulating buffer.
The service software configures and reads out the data via the optical interface. Data logger The data logger (optional) permits archiving of data that the user can select from a predefined set of values. The data logger contains 4 archives to which 8 channels can be assigned. The data can be assigned to any of the channels. The service software is used for the configuration.
Type summary The Ultrasonic heating and cooling energy meters UH50.. listed below are equipped as follows: Mounting location In return Rated pressure PN 16 (PS16) /PN 25 (PS25) Length of control cable 1.5 m/3 m Sensor mounting Return sensor integrated in the flow measuring section Return sensor integrated in the flow measuring section Installing the return sensor in the measuring tube as an option Sensor type Pt500, DS M10x1, length 27.5 mm Pt500, DS M10x1 mm, length 38 mm Pt500, Ø 5.
Smart Infrastructure 2.5 m3/h nominal flow rate, mounting length 130 mm, connecting thread G 1", PN 16, control cable length 1.5 m, Pt500, DS M10x1 mm, sensor length 27.5 mm, cable length 1.5 m, return sensor integrated in the flow measuring section, energy unit display in kWh S55561-F114 UH50-A36-00 2.5 m3/h rated flow, mounting length 190 mm, connecting thread G 1", PN 16, control cable length 1.5 m, Pt500, DS M10x1 mm, sensor length 27.5 mm, cable length 1.
60 m3/h nominal flow rate, mounting length 300 mm, flanged DN 100, PN 25, control cable length 3 m, Pt500, Ø 6 mm, sensor length 150 mm, cable length 5 m, return sensor not integrated in the flow measuring section, energy unit display in MWh S55561-F121 UH50-A83-00 Order number Type S55561-F122 UH50-C05-00 0.6 m3/h nominal flow rate, mounting length S55561-F252 110 mm, connecting thread G ¾", PN 25, control cable length 1.5 m, Pt500, DS M10x1 mm, sensor length 27.5 mm, cable length 1.
2.5 m3/h nominal flow rate, mounting length S55561-F255 130 mm, connecting thread G 1", PN 25, control cable length 1.5 m, Pt500, DS M10x1 mm, sensor length 27.5 mm, cable length 1.5 m, return sensor installation in the measuring tube optional, energy unit display kWh UH50-C37-00 2.5 m3/h nominal flow rate, mounting length S55561-F256 190 mm, connecting thread G 1", PN 25, control cable length 1.5 m, Pt500, DS M10x1 mm, sensor length 27.5 mm, cable length 1.
15 m3/h nominal flow rate, mounting length 270 mm, flanged DN 50, PN 25, control cable length 3 m, Pt500, Ø 6 mm, sensor length 100 mm, cable length 5 m, return sensor not integrated in the flow measuring section, energy unit display in MWh S55561-F128 UH50-C65-00 25 m3/h nominal flow rate, mounting length 300 mm, flanged DN 65, PN 25, control cable length 3 m, Pt500, Ø 6 mm, sensor length 100 mm, cable length 5 m, return sensor not integrated in the flow measuring section, energy unit display in MWh S5
Communication modules for UH50.. Stock no. (optional) Order number Type Pulse module with 2 channels to output standard or "definable" pulses S55563-F107 WZU-P2 M-bus module for heat and heat/cooling energy meters, generation 4, recommended as of firmware 5.15 As of heat and heat/cooling energy meters firmware 5.17 and module firmware 4.10 S55563-F110 WZU-MB G4 M-bus module with 2 pulse inputs For Generation 4 heat and heat/cooling energy meters as of firmware 5.
Pt500, PS Ø 5.2x45 mm, cable length 1.5 m LYU:WZU5-4515 WZU5-4515 Pt500, PS Ø 5.2x45 mm, cable length 5 m LYU:WZU5-4550 WZU5-4550 Pt500, PL Ø 6x100 mm, cable length 2 m LYU:WZU5-1020 WZU5-1020 Pt500, PL Ø 6x100 mm, cable length 5 m LYU:WZU5-1050 WZU5-1050 Pt500, PL Ø 6x150 mm, cable length 2 m LYU:WZU5-1520 WZU5-1520 Pt500, PL Ø 6x150 mm, cable length 5 m LYU:WZU5-1550 WZU5-1550 Stock no.
Adapter piece 110 mm G ¾" to 130 mm G 1": 2 x extension G ¾ B" to G 1 B" 2 x gasket G ¾" 2 x gasket G 1" LYU:WZM-V130.G1 WZM-V130.G1 Adapter piece 110 mm G ¾" to 165 mm G ¾": 1 x extension G ¾ B" to G ¾ B" 1 x gasket G ¾" LYU:WZM-VE165 WZM-VE165 Adapter piece 110 mm G ¾" to 190 mm G 1": 2 x extension G ¾ B" to G 1 B" 2 x gasket G ¾" 2 x gasket G 1" LYU:WZM-V190 WZM-V190 Stock no. (optional) Order number Type Spacer G ¾", length 110 mm, incl.
Sealing disk DN 40, qp 10 m3/h LYU:9060944024 9060944024 Sealing disk DN 50, qp 15 m3/h LYU:9060944025 9060944025 m3/h LYU:9060944026 9060944026 Sealing disk DN 80, qp 40 m3/h LYU:9060944027 9060944027 LYU:9060944028 9060944028 Accessories Order number Type Welding sleeve with threaded hole for temperature sensor DS M10x1 mm S55563-F121 WZT-G10 Welding sleeve G ½", 45° to pipe axis, with threaded hole G ½" S55563-F122 WZT-G12 Welding sleeve G ½", 90° to pipe axis, with threaded hole G
Protection pocket G ½ B" made of stainless steel, with threaded hole G ¼", mounting length 100 mm, incl. gasket G ½" made of copper S55563-F117 WZT-S100 Protection pocket G ½ B" made of stainless steel, with threaded hole G ¼", mounting length 150 mm, incl. gasket G ½" made of copper S55563-F118 WZT-S150 Protection pocket G ½ B" made of brass, Ø 5.2x35 mm for sensor Ø 5.2x45 mm S55563-F103 WZT-M35 Protection pocket G ½ B" made of brass,Ø 5.2x50 mm for sensor Ø 5.
Scope of delivery Operating and installation instructions in multiple languages are included with the ultrasonic heat and heat/cooling meters. Languages The instructions are supplied in 18 languages: Bulgarian, Chinese, Croatian, Czech, Dutch, English, French, German, Greek, Hungarian, Italian, Norwegian, Polish, Russian, Slovakian, Slovenian, Spanish, and Turkish.
Ball valve Example of mounting with a ball valve (recommended up to qp 6) Welded sleeve with protection pocket Example of mounting with protection pockets (recommended above qp 10) Required position for the cooling energy meter To avoid the formation of condensation on cooling energy or combined heat/cooling energy meters, make sure the black cover on the measuring tube points to the side or downward. Install the protection pockets so that the temperature sensor is horizontal or vertical, pointing down.
For water temperatures above 90 °C and/or below 10 °C, mount the processor unit on the wall (split mounting). To fit the processor unit to the wall, remove it from the flow measuring section and undo the screws of the adapter plate. The latter must then be secured to the wall so that the processor unit can be replaced on the adapter plate, snapping into place. NOTICE On models with removable control wiring, you can disconnect and reconnect the wiring during installation.
Technical data Processor unit Function data Measuring range (national approvals may differ) 0…180 °C Range of temperature differential ΔΘ 3…120 K Temperature response threshold 0.2 K Thermal coefficient Shifting compensated Temperature-measuring error without sensor (0.5 + ΔΘmin./ΔΘ) %, max. 1.
Nominal flow qp Installation length Connection Maximum flow qs Minimum Response flow qi threshold (variable) Pressure loss at qp Kv flow rate at Δp 1 bar Kv flow rate 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 G¾ 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 0.6 190 DN20 1.2 6 2.4 150 1.5 0.5 3 1.5 110 G¾ 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.
Power pack AC 110/230 V WZU-AC110/230-15 *) WZU-AC110/230-50 *) Power pack AC 110/230 V ● Protection class ● Voltage range ● Frequency ● Maximum power consumption ● Overvoltage category II per EN 61010-1 ● Length of connecting cable ● External fusing of supply line ● Backup time in the event of power failure II AC 100 to 240 V 50/60 Hz 2.5 VA CAT 2 1.5 m/5 m Automatic cutout 6 A ≥4 h *) The power pack has two outputs. One supplies the meters; the other an optional plug-in GPRS module.
Pulse module WZU-P2 ● Type ● Voltage ● Current ● Classification per EN 1434-2 – Voltage drop ● Classification per EN 1434-2 – Voltage drop Dielectric strength Open collector Max. DC 30 V Max. 30 mA OB Approx. 1.3 V at 20 mA OC Approx. 0.3 V at 0.1 mA 500 Veff against ground M-bus module WZU-MB G4 WZU-MI M-bus slave interface ● Voltage ● Power consumption ● Address ● Baud rate ● Polarity ● Galvanic isolation – From meter – From pulse inputs As per EN 1434-3 and EN 13757-2 /-3 Max. DC 50 V 1 M-bus load (1.
M-bus module WZU-MI Part of pulse input ● Source current ● Pulse input closed (Low) – Switching threshold low – Resistance ● Pulse input open (High) – Switching threshold high – Resistance ● Max. cable length <0.
Modbus module WZU-485E-MOD ● Galvanic isolation – From meter: – From the RS-485 network Yes No Analog module WZU-AM Analog outputs ● Number of outputs ● Output variable ● Max. load at current output ● Max. load at voltage output ● Precision ● Max.
RF module, 868 MHz WZU-LoRa/WZU-LoRa-EXT ● ● ● Transmission frequency Transmitter power (ERP) Range*) – Free field of view – In buildings ● Power supply Via meter **) – ● Power is supplied with a power supply Meets the standard 868 MHz 25 mW (14 dBm) 10 km 100 m Battery type D Transmission interval: 60 minutes, service life: 11 years Transmission interval: 160 minutes, service life: 16 years 110/230/24 V (not with Elvaco: 24 V) LoRaWAN Version 1.
GPRS module WZU-GPRS M-bus master M-bus master interface ● Baud rate ● Number of M-bus slaves ● Line length ● Technical design As per EN 13757 2400 and 9600 baud Max. 8 Max. 1000 2-wire connection, interchangeable Housing type Protection class II as per EN 61010-1 Degree of protection processor unit IP54 Ambient conditions Operation Transportati Storage EN 60721-3-3 on EN 60721-3-1 EN 60721-3-2 Climatic conditions Class A Class A Class A Temperature 5…55 °C- 20…60 °C 20…60 °C Humidity <93% r.
Housing material Cover PC Bottom section PC-GF10 Housing colors Cover Front crystal-clear, logo PEs plastic foil, RAL 7035 and RAL 5014 Bottom section RAL 9002 *) The documents can be downloaded at http://siemens.com/bt/download.
Dimensions Dimensions in mm Processor unit Adapter plate 46 Smart Infrastructure Cross-sectional area CE2N5324en 2019-06-27
Flow measuring section 0.6…2.5 m3/h Mounting length 110 mm (threaded) Mounting length 130 mm (threaded) Mounting length 190 mm (flanged) Mounting length 190 mm (threaded) Flow measuring section as of 3.
Product no. UH50-x45 qp m³/h PN bar a b c 3.5 16 260 51 G11/4 UH50-x47 25 UH50-x50 6 16 260 51 G11/4 UH50-x60 10 16 300 48 G2 16 200 UH50-x63 Flow measuring section as of 3.5 m3/h Flanged Product no. qp m³/h PN bar DN UH50-x46 3.
Large meter qp 150 a 1 g 2 l 250 e Product no.
Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug Tel. +41 58 724 2424 www.siemens.com/buildingtechnologies 50 Smart Infrastructure Document ID CE2N5324en Edition 2019-06-27 © Siemens Switzerland Ltd, 2012 Technical specifications and availability subject to change without notice.
