Honeywell EW452, EW447 DATASHEET

EW447-EW452 Series

Mechanical Heat Meters

FOR HEATING AND COOLING APPLICATIONS

PRODUCT DATA

Application

Static compact heat meter with electronic measurement, consisting of electronic energy integrator and mechanical volume measuring component. Metering of hydronic heating and / or cooling energy in hydronic systems based on volume, supply and return temperature.

EW447-EW449 models are suitable for energy metering of heating systems.

EW450-EW452 models are suitable for energy metering of cooling and combined cooling and heating systems.

Features

• Electronic sensor control for recording flow rate

• Nominal size qp 0.6 to qp 60 m

• Model 447/450 with direct electronic impeller scanning Model 448/449/451/452 with magnetic coupling for electronic scanning of sensor disc

• Lithium battery guarantees longer lifetime than calibration interval

• Optical ZVEI interface equipped as standard

• Primary interface

• Optional: M-Bus interface to EN 1434-3

Design

Hydronic meters of the EW447-452 Series consist of:

• Electronic energy integrator with fixed cable connection to the volume measuring component, supply and return temperature probe

• Mechanical volume measuring component with external threads according to ISO228 (DN15...DN40) or flanges (DN25…DN100)

Materials

• Housing of electronic energy integrator made of plastic

• Housing of mechanical volume measuring component made of brass (EW447, EW448, EW450 and EW451) or of cast iron (EW449 and EW452)

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• Optional: Pulse output for energy and volume for heat meter Pulse output for cold and heat energy in cooling & heat meter (open-collector)

• Adjustable reading date for billing

• Rotatable integrator

• RF version in preparation

Software

Hydro-Set software parametrization tool based on M-Bus and optical interface for

• Readout of measured values

• 18 final monthly values

• Value on readout date

• Error log

• Total down time

• Max. power

• Max. flow rate

• Max. temperature

• Operating hours

•Etc.

• Printing meter logs

• Meter configuration

• Readout date

• Primary address

• Limits for cooling & heat meter

• Reset of max. values

EW447-EW452 SERIES MECHANICAL HEAT METERS

Specifications

Table 1. Specifications

Medium Water quality to VDI2035 Medium temperature 5…90°C (41…194°F) Ambient temperature 5…55°C (41...131°F) - PTB approval Operating pressure PN16

(cv)-values see table below

Ambient class EN1434 class C Protection class IP54 Type Compact heatmeter to EN1434 Measuring process EW447/EW450: direct electronic impeller scanning

EW448/EW449/EW451/EW452: multijet impeller scanning via magnetic coupling with sensors

Display LCD, 7-digit

Units MWh - kWh - GJ - MJ - kW - m Total values 9 999 999 - 999 999.9 - 99 999.99 - 9 999.999 Values displayed Power - Energy - Flow rate - Temperature Temperature sensors Pt500 with 2-wire leads Sensor current Pt500 peak < 2; rms 0,012 mA Measuring cycle 32s Max. measurable temperature difference 147K Min. measurable temperature difference 3K Energy billing from 0.25K Absolute temperature measuring range

0…150°C

(integrator) Operating voltage 3.0V lithium battery

/h - l/h - m³ - l

Table 2. Specifications

Series EW447/EW450 EW448/EW451 EW449/EW452

qp 0.6 1.5 2.5 3.5 6 10 15 25 40 60

Maximum (qs) m Nominal (qp) m

/h 1.2 3 5 7 12 20 50 50 110 140

/h 0.6 1.5 2.5 3.5 6 10 15 25 40 60

Minimum (qi) l/h 6 15 25 70 120 200 300 500 800 1200 Starting l/h 2 4 6 35 60 100 60 60 90 90

kvs (cv)-value m

/h 1.22 3.04 5.08 7 12 20 60 66 141 190

∆p at qp mbar 243 243 242 250 250 250 62 142 80 100

Function

Integrator

The integrator contains all the necessary circuits for recording flow rate and temperature and for calculating, logging and displaying the data. The meter can be conveniently read from a single line seven-digit display with units and symbols. A pushbutton provides user friendly control of the various display loops. All failures and faults are recorded automatically and displayed on the LCD screen. To protect the reading data, all relevant data is saved in a non-volatile memory (EEPROM). This memory saves the measured values, device parameters and types of error at regular intervals.

Mechanical volume measuring component

The technology of the volume measuring component permits very high measuring accuracy and can be used in the supply or

Temperature sensors

Pt500 type temperature sensors to DIN EN 60751 are used as standard.

The temperature sensors are permanently connected to the integrator. They have the following cable lengths:

EW447/EW450 0.4m with sensor installed in volume

measuring housing

1.5m for sensor installation in corresponding supply/return pipe

EW448/EW451 1.5m with sensor installed in volume

measuring housing

3m for sensor installation in corresponding supply/return pipe

EW449/EW452 2 x 6m for sensor installation in supply

and corresponding return pipe

return pipeline. The volume measuring component meets the requirements of EN1434 / class 2 and 3.

Supply voltage:

• Lithium battery 3.0 V DC (10-year life)

EN0H-2601GE25 R0809 2 Honeywell y Subject to change

EW447-EW452 SERIES MECHANICAL HEAT METERS

Ordering Information

Table 3. Available versions and OS-Nos (OS=Ordering Specification)

Size qp Size DN Length Connection Interface OS-No.

(heating only)

0.6 m

/h DN15 110 mm G 3/4 B None EW447A0100 EW450A0100

1.5 m3/h DN15 110 mm G 3/4 B None EW447A1200 EW450A1200

/h DN20 130 mm G 1 B None EW447A2000 EW450A2000

2.5 m

3.5 m3/h DN25 260 mm G 1 1/4 B None EW448A2800 EW451A2800

6.0 m3/h DN25 260 mm G 1 1/4 B None EW448A3600 EW451A3600

/h DN40 300 mm G 2 B None EW448A4600 EW451A4600

10 m

15 m3/h DN50 270 mm Flanges PN16 None EW449A5100 EW452A5100

25 m3/h DN65 300 mm Flanges PN16 None EW449A5900 EW452A5900

/h DN80 300 mm Flanges PN16 None EW449A6900 EW452A6900

40 m

/h DN100 360 mm Flanges PN16 None EW449A7700 EW452A7700

60 m

With M-Bus output

0.6 m

/h DN15 110 mm G 3/4 B M-Bus EW447M0100 EW450M0100

1.5 m3/h DN15 110 mm G 3/4 B M-Bus EW447M1200 EW450M1200

/h DN20 130 mm G 1 B M-Bus EW447M2000 EW450M2000

2.5 m

3.5 m3/h DN25 260 mm G 1 1/4 B M-Bus EW448M2800 EW451M2800

6.0 m3/h DN25 260 mm G 1 1/4 B M-Bus EW448M3600 EW451M3600

/h DN40 300 mm G 2 B M-Bus EW448M4600 EW451M4600

10 m

15 m3/h DN50 270 mm Flanges PN16 M-Bus EW449M5100 EW452M5100

25 m3/h DN65 300 mm Flanges PN16 M-Bus EW449M5900 EW452M5900

/h DN80 300 mm Flanges PN16 M-Bus EW449M6900 EW452M6900

40 m

60 m3/h DN100 360 mm Flanges PN16 M-Bus EW449M7700 EW452M7700

OS-No. (cooling and heating)

With pulse output

0.6 m3/h DN15 110 mm G 3/4 B Pulse output EW447P0100 EW450P0100

/h DN15 110 mm G 3/4 B Pulse output EW447P1200 EW450P1200

1.5 m

2.5 m3/h DN20 130 mm G 1 B Pulse output EW447P2000 EW450P2000

3.5 m3/h DN25 260 mm G 1 1/4 B Pulse output EW448P2800 EW451P2800

/h DN25 260 mm G 1 1/4 B Pulse output EW448P3600 EW451P3600

6.0 m

10 m3³/h DN40 300 mm G 2 B Pulse output EW448P4600 EW451P4600

15 m

/h DN50 270 mm Flanges PN16 Pulse output EW449P5100 EW452P5100

/h DN65 300 mm Flanges PN16 Pulse output EW449P5900 EW452P5900

25 m

40 m3/h DN80 300 mm Flanges PN16 Pulse output EW449P6900 EW452P6900

60 m3/h DN100 360 mm Flanges PN16 Pulse output EW449P7700 EW452P7700

Operation

Loop Overview

The integrator display has two loops.

• Main loop

• Service loop

The main loop is configured to display the data for current energy and energy on reading date. The service loop displays the current data for flow rate, temperatures, power, volume and next reading date.

A button is mounted on the front panel of the meter. This can be pressed for a short or long time. A short press of the button (< 3 seconds) switches to the next display within a loop and a long press (> 3 seconds) switches between the display loops.

NOTE: The LC display has a power save mode, which is acti-

vated by pressing a button. The display switches off automatically and changes to the power save mode if the button is not pressed for 5 minutes.

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