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RELATIVE HUMIDITY -
NISD SERIES
Installation & Operation Instructions
GENERAL INFORMATION
The A/RH Room Series Sensor is a Relative
Humidity transmitter that can be powered with
either an AC or DC supply voltage. The RH Room
transmitter is eld selectable with a 4-20 mA, 0-5
VDC, or 0-10 VDC output signal that is equivalent
to 0 to 100% RH. All units are shipped from the
factory set to 4-20 mA output. This sensor is
designed for use with electronic controllers in
commercial heating and cooling building
management systems. The transmitter includes
an 10K CP(Type II) temperature sensor for
monitoring the space temperature.
For optimal readings, follow these tips:
• Do not install on external walls.
• Avoid air registers, di users, vents, and
windows.
• Avoid con ned areas such as shelves, closed
cabinets, closets, and behind curtains.
• Eliminate and seal all wall and conduit penetrations.
Air migration from wall cavities may alter
temperature readings.
• A thermally-insulated backing should be
used when tting to solid walls (concrete,
steel, etc.). ACI part: A/ROOM-FOAM-PAD
• Do not install near heat sources, eg: lamps, radiators, direct sunlight, copiers, chimney walls, walls concealing
hot-water pipes.
MOUNTING INSTRUCTIONS
Separate the cover from the base. Attach the base directly to the wall or to a standard 2" x 4" junction box using
the (2) #6-32 x 1" screws provided.
Take care when mounting. Check local code for mounting height requirements. Typical mounting heights are
48-60" (1.2-1.5 m) o the ground and at least 1.5' (0.5 m) from the adjacent wall. The sensor should be mounted
in an area where air circulation is well mixed and not blocked by obstructions - see FIGURE 2 (p.2).
Refer to the Wiring Instructions (p. 2) to make necessary connections. After wiring, attach the cover to
the base by snapping the top of the cover on rst and then the bottom. Tighten the cover down, using the
(2) 1/16" Allen screws located in the bottom of the housing. A 1/16" Hex driver is needed to secure the cover
to the base.
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: 1-888-967-5224 | Website: workaci.com
FIGURE 1: ROOM DIMENSIONS
ROOM, VERSION 1
[R]
2.75"
(69.85 mm)
FRONT
BOTTOM
Page 1
Phone: 1-888-967-5224
Website: workaci.com
1.12"
(28.55 mm)
4.50"
(114.30 mm)
RIGHT
Version: 3.0
I0000312
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Summary of Contents for aci NISD Series
- Page 1 • A thermally-insulated backing should be used when tting to solid walls (concrete, steel, etc.). ACI part: A/ROOM-FOAM-PAD • Do not install near heat sources, eg: lamps, radiators, direct sunlight, copiers, chimney walls, walls concealing hot-water pipes. MOUNTING INSTRUCTIONS Separate the cover from the base.
-
Page 2: Wiring Instructions
AC or DC SUPPLY VOLTAGE can cause malfunction or destruction of 4-20 mA OUTPUT electronic circuits. Relative Humidity Wiring Instructions Open the cover of the enclosure. ACI recommends 16 to 26 AWG twisted pair wires 4-20mA VOUT or shielded cable for all transmitters. Twisted... - Page 3 WIRING INSTRUCTIONS (Continued) FIGURE 5: LAYOUT Temperature Wiring Instructions (Continued) All thermistor type room units are supplied with a two-pole terminal block. The number of wires needed depends on the application. All wiring must comply with all local and National Electric Codes. 4-20mA COM VOUT TEMPERATURE...
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Page 4: Output Signals
OUTPUT SIGNALS RH CALIBRATION INSTRUCTIONS Switches 6, 7, and 8 are used to set the RH output Note: This is only a single point calibration. All signal. Refer to FIGURE 7 (below) for switch settings. transmitters are factory calibrated to meet/ex- FIGURE 7: OUTPUT SELECTION ceed published speci cations. -
Page 5: Test Instructions
FIGURE 8: TEST SELECTION TEST INSTRUCTIONS SWITCHES Test mode will make the transmitter output a xed 0% RH Output 0%, 50%, or 100% value. The sensor will not a ect the transmitter output. This is used for troubleshooting or testing only. 50% RH Output Switches 1, 2, and 3 are used for test mode. -
Page 6: Product Specifications
Accuracy @ 0-70 °C (32 - 158 °F): WARRANTY The ACI Room Series RH 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. -
Page 7: Troubleshooting
If the sensor is brand new, leave the sensor powered for at least 30 minutes to stabilize. • If you suspect that the transmitter is not reading within the speci ed tolerance, please contact ACI for further assistance. TEMPERATURE (Optional) PROBLEM SOLUTION(S) •... - Page 8 Automation Components, Inc. 2305 Pleasant View Road Middleton, WI 53562 Phone: 1-888-967-5224 Website: workaci.com Page 8 Automation Components, Inc. Version: 3.0 2305 Pleasant View Road | Middleton, WI 53562 I0000312 Phone: 1-888-967-5224 | Website: workaci.com...
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