Honeywell EW44*A Series, Установка и настройка, Страница: 2 / 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 diffe-
rence
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