Automation Components ACI/334 Duct - Manual (Page 2)

2305 Pleasant View Rd. Middleton Industrial Park Middleton, WI 53562
PH: (608) 831-2585 FAX: (608) 831-7407
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n DUCT SENSORS
Duct temperature sensors - Drill a 3/8” hole in the duct and insert the probe through the hole until the foam pad is up tight
to the duct. Now insert the (2) mounting screws through the mounting holes in flange and tighten until the unit is held
firmly to the duct.
n FLUID IMMERSION TEMPERATURE SENSORS
The ACI Fluid Immersion-type sensors are provided with a 2 ½”, 4”, or 6 ¼” insertion length, 304 series stainless steel
thermowell. The thermowell has a 1/2” NPT external or process thread and a 1/2” NPT internal or instrument threads.
Heat transfer compound may be used but it is not necessary.
n STRAP-ON TEMPERATURE SENSORS
The ACI Strap-On sensors, are provided in a NEMA 1 rated junction box with an adjustable 2” t o 5” pipe clamp. The
unit should be mounted on the bottom side of the pipe to ensure proper heat transfer and a true temperature reading.
Heat transfer compound and insulating the sensor will help the overall accuracy of the sensor. By ordering extra straps
and fastening them together, it is possible to make them fit larger pipes.
n OUTSIDE AIR TEMPERATURE SENSORS
The ACI Outdoor Air temperature sensors are provided, in a weatherproof enclosure. An optional weatherproof Aluminum
Bell Box or NEMA 4X Polycarbonate enclosure is also available upon request for an additional charge. All of the mounting
hardware is provided with the sensor. Be sure to mount the sensor out of direct sunlight, with the sensor probe pointing
downward.
n STAINLESS PLATE TEMPERATURE SENSORS
The ACI Stainless Plate temperature sensors are mounted on the back of a 1 Gang stainless steel plate. The foam pad will
insulate the sensor from any drafts in the wall. (2) 6/32" x 1" machine screws are provided for junction box mounting.
Be sure that the sensor is not mounted on an outside wall, due to the extreme temperature changes from either drafts or heat
transfer.