Honeywell T7414A, WPF20A, VF20A PRODUCT DATA
T7414A / VF20A / WPF20A
STRAP-ON TEMPERATURE SENSORS
PRODUCT DATA
GENERAL
The T7414A/VF20A/WPF20A Strap-on Temperature Sensors are used for temperature measurement on warm/hot water pipes or solar collectors.
The sensors can be employed for hot and cold water installations in the following control systems
•Excel 5000
•MicroniK 200
•MicroniK 100
•Excel Classic
•Excel Plus
•High Performance Excel Plus
•Excel EMC
or other systems using PT1000 or NTC 20kΩ temperature sensing elements.
FEATURES
•PT1000 or NTC 20kΩ temperature sensing element
•Wide sensing range
•High accuracy
Models
OS no. |
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description |
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sensing range |
T7414A1008 |
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Strap-on PT1000 |
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0...+110 °C |
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Temperature Sensor |
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(+32...+230 °F) |
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VF20A |
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Strap-on NTC20kΩ |
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0...+110 °C |
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Temperature Sensor |
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(+32...+230 °F) |
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WPF20A |
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Two strap-on NTC20kΩ |
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0...+110 °C |
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Temperature Sensors |
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(+32...+230 °F) |
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SPECIFICATION
Nominal value |
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PT1000 |
1000 Ω at 0 °C |
NTC20kΩ |
20 kΩ at 25 °C |
Accuracy |
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PT1000 |
IEC751 Class B |
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0.3 K +0.5% • |t| (t in °C) |
NTC20kΩ |
0.3 K at 25 °C |
Sensitivity |
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PT1000 |
≈ 3.85 Ω / K |
NTC20kΩ |
≈ -934.5 Ω / K at 25 °C (non-linear) |
Response time |
τ0.5 ≈ 1 minute |
Electrical connection |
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T7414A/VF20A |
terminals for 2 x 1.5 mm² cable |
WPF20A |
terminals for 4 x 1.5 mm² cable |
Ambient Limits (wiring box) |
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Transport and |
-35...+70 °C (-31...+158 °F) |
storage temperature |
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Humidity |
5…95% r.h., non-condensing |
Safety (terminal box) |
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Protection standard |
IP54 as per EN60529 (T7414) |
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IP30 (VF20, WPF20) |
Flame retardant |
V1 as per UL94, Plastic (PC) |
Housing |
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Dimensions |
See Fig. 1 on page 2 |
Weight |
100 g |
® U.S. Registered Trademark |
|
EN0B-0364GE51 R0608 |
Copyright © 2008 Honeywell Inc. • All rights reserved |
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T7414A / VF20A / WPF20A STRAP-ON TEMPERATURE SENSORS
DIMENSIONS
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50 |
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(1.97) |
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33 |
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(1.3) |
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max. diameter 110 |
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(4.25) |
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65 |
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(2.55) |
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tightening strap |
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case hole diameter |
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7 (0.28) |
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allows Pg9 cable |
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Fig. 1. Dimensions of T7414A / VF20A / WPF20A in mm (inches)
INSTALLATION
wiring run |
max. length |
Sensor to controller |
200 m (660 ft) |
Offset (at PT1000 sensors, only) due to wire resistance per 10 m of distance from sensor to controller:
type of wire |
temperature offset PT1000 |
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0.5 mm2 |
(AWG20) |
0.18 °C (0.324 °F) |
1.0 mm2 |
(AWG17) |
0.09 °C (0.162 °F) |
1.5 mm2 |
(AWG15) |
0.06 °C (0.108 °F) |
NOTE: Use shielded wiring in areas with high EMI. Keep 15 cm (5.9’’) minimum distance between sensor lines and 230 Vac power lines.
Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Ecublens, Route du Bois 37, Switzerland by its Authorized Representative:
Automation and Control Solutions
Honeywell GmbH Böblinger Strasse 17
71101 Schönaich / Germany
Phone: (49) 7031 63701
Fax: (49) 7031 637493 http://ecc.emea.honeywell.com
Subject to change without notice. Printed in Germany
EN0B-0364GE51 R0608
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