Honeywell T7470A1009 PRODUCT DATA AND INSTALLATION INSTRUCTIONS
Space-Temperature Sensor
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HONEYWELL EXCEL 5000 OPEN SYSTEM
PRODUCT DATA AND INSTALLATION INSTRUCTIONS
FEATURES
· Mountable directly on a wall.
· Operating range 43 to 104°F / 6 to 40°C.
· CE approved.
· IP 30 housing.
· Compact.
SENSOR CHARACTERISTIC
The 20 kΩ NTC temperature sensor follows a specific
temperature-resistance curve (see Fig. 1).
e (o
T7470A1009
80 K
70 K
60 K
50 K
GENERAL
The T7470A1009 is equipped with a 20 kΩ NTC spacetemperature sensor and can be directly wired to the following
Honeywell controllers:
· W7750A,B
· W7751B,D,F,H
· W7752D,E,F,G
· W7753A
· W7761A
· W7762A,B
· W7763C,D,E
· Excel 600, 500, 100, 80, 50, 20.
Please refer to the technical specifications of the individual
controllers in order to determine their suitability for use in
conjunction with a given sensor application.
40 K
30 K
al resis
20 K
ele
10 K
30
40 50 60 70 80 90 100 110
0 10 20 30 40
temperature (degrees)
Fig. 1. Temperature vs. resistance for 20 kΩ sensor
°
°C
® U.S. Registered Trademark EN0B-0469GE51 R0604
Copyright © 2004 Honeywell Inc. • All rights reserved
T7470A1009 SPACE-TEMPERATURE SENSOR
SPECIFICATIONS
Dimensions (H 5 W 5 D): 2 5 1-9/16 5 3/4 in.
(56 5 46 5 19.3 mm).
Construction: Two-piece construction (a cover and an
internally wired sub-base). Field wiring 16 to 22 AWG (1.5 to
0.34 mm
2
) connects to a terminal block.
Operating Temperature: 43...104°F / 6...40°C.
Shipping Temperature: -40...150°F / -40...65°C.
Relative Humidity: 5% to 95% non-condensing.
Accuracy: Dt = 0.3 K +1% · |t - 25 °C| (t in °C)
Safety: terminal box
Protection standard: IP30
Approvals: CE
BEFORE MOUNTING
All wiring must comply with local electrical codes and
ordinances or as specified on installation wiring diagrams.
Removing the Cover
The cover of the space-temperature sensor can be easily
popped off by applying pressure simultaneous pressure to
the right and left sides at the top and bottom (see Fig. 2).
2
1
Fig. 3. Wire insertion
To facilitate wire insertion, it is possible to temporarily
remove the terminal block from the housing. After wire
insertion, however, the terminal block should be snapped
back into place.
MOUNTING
Mount the T7470A1009 on an inside wall approx. 54 in.
(1.3 m) from the floor (or in the specified location) to allow
exposure to the average zone temperature.
Maintain a mounting clearance of approx. 4 in. (10 cm) to
both sides of the space-temperature sensor in order to allow
free airflow.
Do not mount the space-temperature sensor on an outside
wall, on a wall containing water pipes, or near air ducts.
Avoid locations exposed to discharge air from registers or
radiation from lights, appliances, or the sun.
Keep wiring at least one ft (305 mm) away from large inductive loads such as motors, line starters, lighting ballasts, and
large power distribution panels. Run space-temperature
sensor wiring separately from 50 Vac or greater power wiring.
The T7470A1009 can be mounted directly onto walls (see
Fig. 4 for dimensions and drilling template), in which case the
type of screws appropriate to the wall material should be
used.
19.3
Fig. 2. Removing the cover
Space-temperature sensor wiring can be sized from 16 to 22
AWG (1.5 to 0.34 mm
maximum length of wire from a device to the spacetemperature sensor is 1000 ft (305 m). Twisted-pair wire is
2
), depending on the application. The
56
32.7
ABS
recommended for wire runs longer than 100 ft (30.5 m).
Wire Insertion
After removing the cover, the wires can be easily inserted
into the terminal block as shown in Fig. 3. The terminals are
insensitive to polarity.
Automation and Control Solutions
Honeywell GmbH
Böblinger Strabe 17
D-71101 Schönaich
Phone xx49-(0)7031-637-01
Fax xx49-(0)7031-637-493 Manufacturing location
46
Fig. 4. T7470A1009 dimensions (in mm)
27.8
http://europe.hbc.honeywell.com is certified to
3.25
4.5
50
40
EN0B-0469GE51 R0604
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