aci STRAP ON Series Installation instructions

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 1
Version: 2.0
I0000819
FIGURE 1: ENCLOSURE
DIMENSIONS
STRAP ON SERIES
Installation & Operation Instructions Phone: [phone]
Website: workaci.com
PRECAUTIONS
• DO NOT RUN THE WIRING IN ANY CONDUIT
WITH LINE VOLTAGE (24/120/230 VAC).
GENERAL INFORMATION
The ACI Strap-On Series Sensor features a 1.5”
square copper plate with the sensor encapsulated
to the back side of the plate to improve the thermal
conductivity between the pipe and the sensor
when an immersion style sensor can’t be inserted
into the pipe. The Strap-On temperature sensor is a
single point temperature sensor that is designed
for use with electronic controllers in commercial
heating and cooling building management
systems. It is available with multiple thermistor
and RTD options.
The Strap-On series sensor can be used to monitor
pipe sizes from 1-1/4” to 10” (31.75mm to 254mm).
The“-S”Model is designed to t around an 1-1/4”to 4”
(31.75mm to 101.5mm) pipe. The “-S10” Model is
designed to t around a 2” to 10” (50.8mm to
101.5mm) pipe. The “-S” Model can be mounted to
larger diameter pipe by adding an additional hose
clamp.
For optimal temperature measurement, follow
these tips:
•Clean the pipe with an emery cloth or file
before applying thermal grease and insulate
the sensor from the effects of ambient air.
•The sensing element is the 1.5”square copper
plate. Applying thermal grease in-between
the sensor plate and pipe is recommended,
but not required.
MOUNTING INSTRUCTIONS
If there is insulation around the pipe, remove a
section of insulation to accommodate the width
of the junction box and sensor. The sensor
should be mounted on the top or side of the
pipe. Press the sensor copper plate to the
cleaned pipe surface, and tighten the clamp
around the pipe. Take care not to overtighten
clamp to prevent damage to the copper heat
transfer plate or sensor.
PLASTIC BOX (-PB)
3.60"
(91.44 mm)
2.25"
(57.15 mm)
GALVANIZED ENCLOSURE (-GD)
2.31"
(58.67 mm)
4.18"
(106.17 mm)
NEMA -4X (-4X)
2.55”
(64.77 mm)
FOAM PAD, WILL COMPRESS
UPON INSTALLATION
ADJUSTABLE
FOAM PAD, WILL COMPRESS
UPON INSTALLATION
ADJUSTABLE
3.70"
(93.98 mm)
FOAM PAD, WILL COMPRESS
UPON INSTALLATION
ADJUSTABLE

FIGURE 2: MOUNTING ASSEMBLY FIGURE 3: ROOM, FOAM PAD
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 2
Version: 2.0
I0000819
INSULATION
PIPE
MOUNTING (CONTINUED)
As you are tightening the clamp, make
sure the sensor does not rotate. Place
insulation around the sensing point to
prevent ambient air affecting the sensed
temperature - see FIGURE 3.
WIRING INSTRUCTIONS
Open the cover of the enclosure. ACI recommends 14 to 22 AWG twisted pair wires or shielded cable for
all sensors. Signal wiring must be run separate from low and high voltage wires (24/120/230VAC). All ACI
thermistors and RTD temperature sensors are both non-polarity and non-position sensitive. Thermistor
sensors are supplied with (2) ying lead wires, and RTD’s are supplied with (2) or (3) ying lead wires – see
FIGURE 4. The number of wires needed depends on the application.
Connect thermistor/RTD wire leads to controller analog input wires using wire nuts, terminal blocks, or
crimp style connectors. All wiring must comply with all local and National Electric Codes. After wiring,
attach the cover to the enclosure.
Note: When using a shielded cable, connect only (1) end of the shield to ground at the controller only.
Connecting both ends of the shield to ground may cause a ground loop. When removing the shield from
the sensor end, make sure to properly trim the shield to prevent any chance of shorting.
Note: If the controller requires a (2) wire input for a RTD, connect the (2) common wires(same color)
together. If the controller requires (3) wires, use (3) individual wires.
INSULATION ADDED TO COVER
SENSOR. INSULATION CAN WRAP
AROUND ENTIRE ENCLOSURE.
Thermistor or
RTD 2-Wire
Wire Nut
Wire Nut
RTD 3-Wire
Same Color
Wires
Wiring from Controller
Analog Input
Wiring from Controller
Analog Input
FIGURE 4: WIRING
2-WIRE THERMISTOR or RTD WIRING 3-WIRE RTD WIRING

WARRANTY
The ACI Strap On Series temperature sensors are covered by ACI’s Five (5) Year Limited Warranty, which is located
in the front of ACI’S SENSORS & TRANSMITTERS CATALOG or can be found on ACI’s website: www.workaci.com.
W.E.E.E. DIRECTIVE
At the end of their useful life the packaging and product should be disposed of via a suitable recycling
centre. Do not dispose of with household waste. Do not burn.
TROUBLESHOOTING
PROBLEM
Sensor reading is incorrect
Sensor reads innity/very high resistance
Sensor reads low resistance
Erratic readings
SOLUTION(S)
•Verify sensor wiring to controller is not damaged and has continuity.
•Verify sensor or wires are not shorted together.
•Verify controller is setup for correct sensor curve.
•Disconnect wires from sensor terminal block, tighten terminal block
screws down, and take a resistance (ohm) reading with a multimeter.
•Compare the resistance reading to the Temperature Vs Resistance
Curves online: http://www.workaci.com/content/thermistor-curves-0
•Verify proper mounting location to conrm no external factors are
aecting reading.
•Sensor or wires are open.
•Sensor or wires are shorted together.
•Condensation on PCB board
•Bad wire connections.
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 3
Version: 2.0
I0000819

PRODUCT SPECIFICATIONS
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 4
Version: 2.0
I0000819
A/1.8K: 1.8 KΩ nominal (Red/Yellow)
A/3K: 3 KΩ nominal (White/Brown)
A/AN (Type III): 10 KΩ nominal (White/White)
A/AN-BC: 5.238 KΩ nominal (White/Yellow)
A/CP (Type II): 10 KΩ nominal (White/Green)
A/50K: 50 KΩ nominal (Brown/Yellow)
A/1.8K Series: +/- 0.5 °C @ 25 °C (77 °F)
and (+/-1.0 °C) (+/-1.8 °F)
A/100: 100 Ω nominal
+/- 0.06% Class A (Tolerance Formula: +/- °C = (0.15 °C + (0.002 * |t|))
where |t| is the absolute value ofTemperature above or below 0 °C in °C)
@ -40 °C (-40 °F): +/- 0.23°C (+/- 0.414 °F)
@ 0 °C (32 °F): +/- 0.15°C (+/- 0.27 °F)
1 KΩ nominal (Red/Red)
@ -40 °C (-40 °F): +/- 1.52 °C (+/- 2.73 °F)
@ 0 °C (32 °F): +/- 0.4 °C (+/- 0.72 °F)
@ 21.1 °C (70 °F): +/- 0.17 °C (+/- 0.34 °F)
1 KΩ nominal (Orange/Yellow)
+/- 1%
A/CSI: 10 KΩ nominal (Green/Yellow)
A/10KS: 10 KΩ nominal (White/Blue)
A/10K-E1: 10 KΩ nominal (Gray/Orange)
A/20K: 20 KΩ nominal (Brown/Blue)
A/100KS: 100 KΩ nominal (Black/Yellow)
A/10K-E1 Series: +/- 0.3 °C (+/- 0.54 °F)
All Else: +/- 0.2 °C (+/- 0.36 °F)
A/1K: 1 KΩ nominal
@ 93 °C (200 °F): +/- 0.34 °C (+/- 0.61 °F)
@ 54.4 °C (130 °F): +/- 0.56 °C (+/- 1.00 °F)
@121 °C (250 °F): +/- 1.25 °C (+/- 2.25 °F)
One
-40 to 85 °C (-40 to 185 °F)
(see Enclosure Specications)
10 to 95% RH, non-condensing
22 AWG (0.65 mm)
A/xx-S-GD: Galvanized Steel, -40 to 93 °C (-40 to 200 °F ), NEMA 1 (IP 10)
A/xx-PB: ABS Plastic, -30 to 85
°C (-22 to 185 °F ), UL94-HB, Plenum Rated
A/xx-S-4X: Polystyrene, -40 to 70
°C (-40 to 158 °F ), UL94-V2, NEMA 4X (IP 66)
SENSOR NON-SPECIFIC INFORMATION
Number Sensing Points:
Storage Temperature Range:
Operating Temperature Range:
Operating Humidity Range:
Wire Size
Enclosure Specications:
(Temperature, NEMA Ratings)
THERMISTOR
Sensor Output @ 25 °C (77 °F):
(Lead Wire Colors)
*Does not include CL2P
Accuracy 0-70 °C (32-158 °F):
PLATINUM
Sensor Output @ 0°C (32 °F):
Accuracy @ 0°C (32°F):
NICKEL
Sensor Output @ 21.1°C (70 °F):
Accuracy:
BALCO
Sensor Output @ 21.1°C (70 °F):
Accuracy @ 21.1°C (70 °F):