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
3
• 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)
Honeywell y Subject to change EN0H-2601GE25 R0809
• 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
/h
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
k
vs
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
³
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
3
Maximum (qs) m
Nominal (qp) m
/h 1.2 3 5 7 12 20 50 50 110 140
3
/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
3
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)
3
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
3
/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
3
/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
3
/h DN80 300 mm Flanges PN16 None EW449A6900 EW452A6900
40 m
3
/h DN100 360 mm Flanges PN16 None EW449A7700 EW452A7700
60 m
With M-Bus output
3
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
3
/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
3
/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
3
/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
3
/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
3
/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
3
15 m
/h DN50 270 mm Flanges PN16 Pulse output EW449P5100 EW452P5100
3
/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.
Honeywell y Subject to change 3 EN0H-2601GE25 R0809
Loading...