Dwyer TE-SNW - Manual

Series TE-SNW Weather Resistant Surface Temperature Sensor
Specifications - Installation and Operating Instructions
Bulletin T-TE-SNW
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
SPECIFICATIONS
Accuracy:
Thermistor Temperature Sensor: ±0.2°C @ 25°C
(±-0.36°F @ 77°F);
RTD Temperature Sensor: DIN Class A ±0.15°C @ 0°C
(±0.28°F @ 32°F).
Temperature Limits: Operating: -32 to 240°F (-35.5 to 115.5°C).
Sensor Curves: See resistance vs temperature table.
Housing Material: Meets UL 94 V-0 polycarbonate plastic, NEMA 3R.
Weight: 7 oz.
The Series TE-SNW Surface Temperature Sensor non-intrusively
measures the process temperature in hot and cold water loops in
buildings. An adjustable metal strap can tightly fit around 2 through 6˝
pipe sizes, allowing the surface area of the copper plate on the sensor
to make good contact with the pipe surface. In order to work with most
common building controllers, the output of the sensor can be chosen
from 6 different RTD and Thermistor curves. Additional features include
a quarter turn twist off cap that is chained to the housing to prevent it
from getting lost, and multiple knockout locations and sizes to reduce
installation time.
INSTALLATION
1. Knock out the preferred conduit entrance and attach either a conduit
fitting or cable gland.
2. Remove the protective film from the copper plate and the stainless
steel mounting plate.
3. Uncoil strap by lifting the screw head up like shown in Figure 1 and
pressing on the end of the strap.
4. Slide the open end of the strap through the gap in the stainless steel
mounting plate underneath the foam block opposite the copper plate, as
shown in Figure 2.
5. Add a small amount of thermal transfer paste to the copper plate.
6. Wrap the strap around the pipe and insert the open end into the strap
fastener.
7. Pull the open end of the strap until the copper plate is flush against
the pipe.
8. Lower the screw head to lock the strap in place as shown in Figure 1.
9. Use a flat head screw driver to tighten the strap.
10. Remove the cover.
11. Connect wires to the terminal block.
12. Close the lid tightly to protect against water ingress.
Make sure all connections are in accordance with the job wiring diagram
and in accordance with national and local electrical codes. Use 18 to 20
AWG twisted pair or shielded copper conductors only.
3-1/4
[82.38]
1 [25.97]
2 X PG11
KNOCKOUTS
2 X PG16
KNOCKOUTS
FITS 2
TO 6˝ PIPE
1-1/2
[38.10]
3-3/8
[84.86]
Figure 1
Figure 2
Do not over tighten the strap to the pipe as it could cause
damage to the sensor. CAUTION
IN LOCKED POSITION IN ADJUSTABLE POSITION
INSERT INTO SLOT UNDER FOAM