Honeywell EW452, EW447 DATASHEET

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EW447-EW452 Series

Mechanical Heat Meters

FOR HEATING AND COOLING APPLICATIONS

PRODUCT DATA

Application

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)

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 m3/h

•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

•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

Honeywell y Subject to change

EN0H-2601GE25 R0809

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
kvs(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 - m³/h - l/h - m³ - l
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

				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)	m3/h	1.2	3		5		7	12	20	50	50	110	140
Nominal (qp)	m3/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	m3/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 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)

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 corre-
	sponding supply/return pipe

EW448/EW451	1.5m with sensor installed in volume
	measuring housing
	3m for sensor installation in corre-
	sponding supply/return pipe

EW449/EW452	2 x 6m for sensor installation in supply
	and corresponding return pipe

EN0H-2601GE25 R0809

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.	OS-No.
					(heating only)	(cooling and
						heating)
0.6 m3/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
2.5 m3/h	DN20	130 mm	G 1 B	None	EW447A2000	EW450A2000
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
10 m3/h	DN40	300 mm	G 2 B	None	EW448A4600	EW451A4600
15 m3/h	DN50	270 mm	Flanges PN16	None	EW449A5100	EW452A5100
25 m3/h	DN65	300 mm	Flanges PN16	None	EW449A5900	EW452A5900
40 m3/h	DN80	300 mm	Flanges PN16	None	EW449A6900	EW452A6900
60 m3/h	DN100	360 mm	Flanges PN16	None	EW449A7700	EW452A7700
With M-Bus output
0.6 m3/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
2.5 m3/h	DN20	130 mm	G 1 B	M-Bus	EW447M2000	EW450M2000
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
10 m3/h	DN40	300 mm	G 2 B	M-Bus	EW448M4600	EW451M4600
15 m3/h	DN50	270 mm	Flanges PN16	M-Bus	EW449M5100	EW452M5100
25 m3/h	DN65	300 mm	Flanges PN16	M-Bus	EW449M5900	EW452M5900
40 m3/h	DN80	300 mm	Flanges PN16	M-Bus	EW449M6900	EW452M6900
60 m3/h	DN100	360 mm	Flanges PN16	M-Bus	EW449M7700	EW452M7700
With pulse output
0.6 m3/h	DN15	110 mm	G 3/4 B	Pulse output	EW447P0100	EW450P0100
1.5 m3/h	DN15	110 mm	G 3/4 B	Pulse output	EW447P1200	EW450P1200
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
6.0 m3/h	DN25	260 mm	G 1 1/4 B	Pulse output	EW448P3600	EW451P3600
10 m3³/h	DN40	300 mm	G 2 B	Pulse output	EW448P4600	EW451P4600
15 m3/h	DN50	270 mm	Flanges PN16	Pulse output	EW449P5100	EW452P5100
25 m3/h	DN65	300 mm	Flanges PN16	Pulse output	EW449P5900	EW452P5900
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 activated 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

EN0H-2601GE25 R0809

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