Honeywell EW451 Series, EW447A0100, EW450A0100, EW447A1200, EW450A1200 Installation And Setup

Honeywell y All rights reserved EN0H-2601GE25 R0413

EW447-EW452 Series

Mechanical Heatmeters

FOR HEATING AND COOLING APPLICATIONS

PRODUCT DATA

Fig. 1. EW447 (cables removed)

Fig. 2. EW447F (with RF)

CONTENTS

Contents ............................................................................... 1

General ................................................................................. 2

Application .......................................................................... 2

Features ............................................................................. 2

Design ................................................................................ 2

Materials ............................................................................. 2

Approvals ........................................................................... 2

Technical Details ................................................................. 2

Specifications .....................................................................2

Flow data ............................................................................3

Sizing .............................................................................. 3

Function ............................................................................. 3

Installation and Setup ......................................................... 4

Software .......................................................................... 4

Communication and Readout ............................................. 5

Typical Readout Applications ......................................... 5

Identification ....................................................................... 6

Dimensions ........................................................................ 7

Ordering Details ................................................................... 8

Ordering Information .......................................................... 8

Scope of Delivery ............................................................... 9

Accessories ........................................................................ 9

Diagrams ............................................................................ 11

Measuring Accuracy ......................................................... 11

Flow Diagram ................................................................... 12

EW447-EW452 SERIES MECHANICAL HEATMETERS

EN0H-2601GE25 R0413 2 Honeywell y All rights reserved

GENERAL

Application

Honeywell EW447-452 Series mechanical meters are compact
heat or chilled water meters with electronic measurement
based on the multijet principle, consisting of an electronic
energy calculator, a multijet flow sensor and two temperature
sensors.

They are used for metering of hydronic heating and/or cooling
energy in hydronic systems based on volume, supply and
return temperature.

EW447-449 models are suitable for energy metering in heating
systems (‘heat metering’).

EW450-452 models are suitable for energy metering in
heating, cooling or combined systems.

Features

• Approval for meter with dynamic range of 100:1 (qp:qi)
in class 2

• Lithium battery, battery lifetime 12 years

• Optical interface as standard

• Rotatable calculator

• Optionally with integrated radio, Open Metering
Standard, 868MHz

Design

EW447-452 Series mechanical meters consist of:

• Electronic energy calculator with power supply and fixed to
mechanical flow sensor

• Factory fitted supply and return temperature sensors

• Optionally M-Bus or pulse output function

• Flow sensor with external threads according to ISO228
(DN15…DN40) or flanges PN16 (DN32…DN100)

• EW45x versions with potted electronics

Materials

• Front panel of energy calculator made of dark grey plastic
with laser markings for approval, flow and other product
information

• Housing of energy calculator made of dark grey plastic

• EW447 and 452: housing of flow sensor made of unpainted
brass

• EW448, 449, 451 and 452: housing of flow sensor made of
brass, painted dark grey

Approvals

Heating

• DN15…20: MID class 2 (DE-07-MI004-PTB030) and
EN1434 (22.52 / 00.02)

• DN25…40: MID class 2 (DE-09-MI004-PTB001) and
EN1434 (22.52 / 06.02)

• DN50…100: EN1434 (22.52 / 01.02)

TECHNICAL DETAILS

Specifications

Sizes DN15…DN100

qp0.6…60m³/h

Medium Water, quality to VDI2035

Medium temperature 5...90°C

Ambient temperature 5…55°C

Storage temperature -20…55°C

Operating pressure max. 16bar

Protection class IP54 (EW44x)

Measuring process Fully electronic compact heat meter

with direct impeller scanning
(EW447, 448, 450 and 451) or
impeller scanning via magnetic
coupling with sensors (EW449 and

452)

Display LCD, 7-digit

Display units MWh, kWh, GJ, MJ, kW, m³/h, l/h,

m³ and l

Display values 9 999 999, 999 999.9, 99 999.99,

9 999.999

Values displayed Power, energy, flow rate, tempera-

ture, energy on readout date,
readout date

Measuring cycle
volume

16s

Measuring cycle
temperature

32s

Temperature diffe­rence

max. 147K

Starting temperature
difference

0.25K

Absolute temperature
measuring range

0…150°C

Temperature sensors Pt500 with 2-wire leads

Operating voltage 3.0V

Ambient class Class C + M1

Battery lifetime 10 + 2 years

Interfaces Optical

Optional interfaces

EW447-EW452 SERIES MECHANICAL HEATMETERS

Honeywell y All rights reserved 3 EN0H-2601GE25 R0413

Flow data

Table 1. Flow rates EW447-452 Series

Sizing

• EW447-452 Series mechanical meters should be selected in such a way that typical system flow rates are between approved
minimum (qi) and maximum flow rate (qs)

• Overload flow rate may be reached for not more than 15 minutes per day

• Flow rates below minimum and above maximum should be avoided

DN 15 15 20 25 25 40 50 65 80 100

Flow rates according to MID

Minimum (qi) l/h 6 15 25 70 120 200 300 500 800 1,200

Nominal (qp) m³/h 0.6 1.5 2.5 3.5 6 10 15 25 40 60

Maximum (qs) m³/h1.2 3 5 7 1220305080120

Dynamic range (qp/qi) 1:100 100:1 100:1 50:1 50:1 50:1 50:1 50:1 50:1 50:1

Additional flow data

Starting flowrate l/h 1.5-2 3-4 5-6 35 60 100 60 60 90 90

Overload flow rate m³/h 50 50 110 140

Pressure loss @ qp 243 243 242 170 190 240 62 142 80 100

Function

Fig. 3. EW447 components

Energy Calculator

The energy calculator (or simply ‘calculator’) contains circuits
for recording flow rate and temperature and for calculating,
logging and displaying data.
The meter can be read from a single line seven-digit display
with units and symbols. A push button provides control of
various display loops. All failures and faults are recorded auto­matically and displayed on the LCD screen. For protection all
relevant data is saved in a non-volatile memory (EEPROM).
This memory saves measured values, device parameters and
types of error at regular intervals.

Flow Sensor

The multijet technology of the flow sensor permits high
measuring accuracy. Standard place of installation is return
pipeline. For installation in supply a different version has to be
used. Meters cannot be reconfigured from return to supply
pipeline usage in the field.

Power Supply

Non replaceable lithium battery 3.0V DC with 10 + 2 year life­time (10 year nominal lifetime, 1 year for storage an 1 year
buffer). Nominal lifetime relates to normal usage. Battery life­time is decreased by shorter readout intervals, longer data tele­grams, etc.

Temperature sensors

EW447-452 Series mechanical meters are supplied with
installed Pt500 temperature sensors with 2-wire leads,
Ø5.2mm. The temperature sensors are permanently installed
to the meter and cannot be replaced. Sensor cable lengths are
as follows:

Interfaces

EW447-452 Series mechanical meters are equipped with a
ZVEI optical interface for communication and testing as stan­dard. Further all meters are available with either RF, MBus or
pulse output. For more details on interfaces see chapter
“Communication and Readout” below.

Energy calculator

Return temperature

Flow sensor

Supply temperature
sensor

sensor

EW447 and 450 • Supply: 1.5m

• Return: 0.4m with sensor installed in
housing of flow sensor

EW448 and 451 • Supply: 3.0m

• Return: 1.5m with sensor installed in
housing of flow sensor

EW449 and 452 • Supply: 6m

• Return: 6m

EW447-EW452 SERIES MECHANICAL HEATMETERS

EN0H-2601GE25 R0413 4 Honeywell y All rights reserved

Installation and Setup

Medium

Heat meters generally are only approved for metering of water
and not for water glycol mixtures or fluids other than water.
During measurement meter must be completely filled with
water.

Flow Sensor

EW447-452 Series mechanical meters must be installed in the
return pipeline. When installed in the supply pipeline measure­ments are either unreliable, inaccurate or nonexistent. Pipeline
configuration cannot be changed in the field.

• Avoid installation at highest point of system or system part as
air may be trapped in meter

• It is recommended to place a ballvalve before and after the
heat meter for easy replacement

• Various fittings are available for sizes DN15…DN40

• Ball valves and fittings see Accessories on page 9f

• Further it is recommended to place a strainer before the
meter to avoid dirt entering the flow sensor

Fig. 4. Flow sensor installation

Calming legs

• EW447, 448, 450 and 451: calming legs before or after meter
are not required

• EW449 and 452: a calming leg of 3 x DN before meter is
recommended, in case of a T-piece or bend before the meter
a length of 5 x DN is recommended

Installation position

• EW447 and 450 may be installed in any position

• EW448, 449, 451 and 452 may only be installed in horizontal
position

Temperature Sensors

• Temperature sensors have to be installed like for like.
Example: if one temperature sensor is installed directly in the
flow, the second temperature sensor also has to beinstalled
directly in the flow

• Temperature sensors may only be installed directly in the
flow or, for sizes DN65 and larger, with MID approved sensor
pockets. See Accessories

• Sensor pockets can also be used for smaller sizes, although
installation directly in the flow is preferred

• Various fittings and other accessories are available for
temperature sensor installation, see Acessories on page 9f

Meter (exemplary)

Ball valve Connection fitting Connection fitting Ball valve

Fig. 5. Temperature sensor

installation with ballvalve

Fig. 6. Temperature sensor

installation with sensor

pocket

Ball valve

Temperature

Temperature sensor

sensor

installation kit

Sensor

Temperature
sensor

T-piece

pocket

Software

In general it is not necessary to parametrise EW447-452
meters in the field unless standard values should be changed.
Such changes can be done with the HydroSet software which
you can download free of charge from
http://metering.ecc.emea.honeywell.com/.