Digital Display Zone Sensor
Literature Order Number:VAV-SVN05B-EN
Ordering number: Single Setpoint: X13790464-01(41901120)
Specifications
Input Power
NEC Class 2, 18-32Vac 50/60Hz, 24Vac nominal, 1VA max
Size
2.8 x 4.5 x 1.2 in. (71.1 x 114.3 x 27.8 mm) including button heights
Mounting
Vertically flush mount or mount on standard vertical 2 x 4 in. (50.8 x 101.6 mm) device box
Communication Jack
Accessible through bottom of cover
Environmental
Operational: Temperature range 32 to 120°F (0 to 49°C) Humidity: 5 to 95% non-condensing
Storage: Temperature range –4 to 130°F (-20 to 54°C)
Wiring Diagram |
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VAV 4.2 |
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MP501 |
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AH540 |
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ZN511 |
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VV550 |
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ZN517 |
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AH541 |
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VV551 |
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ZN521 |
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TB1 |
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TB1 |
AC POWER |
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Terminals |
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24V AC* |
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TB1–1 |
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24V |
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24VAC |
1 |
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24V |
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2 |
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24V GND* |
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TB1–2 |
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GND |
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24VAC |
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GND |
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GND |
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Wiring |
TB2 |
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ZONE TEMP |
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TB3 |
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ZN |
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IN 1 |
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ZONE SENSOR |
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INPUTS |
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1 |
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TB3–1 |
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Sensor |
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ZONE |
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TB3–3 |
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2 |
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SENSOR GND |
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TB3–2 |
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GND |
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GND |
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GND |
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Zone |
3 |
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SETPOINT |
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SET |
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SET |
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IN 2 |
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4 |
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Display |
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COMM 5 |
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TB3 |
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TB2 |
COMM 5 |
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Digital |
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TB2–2 |
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1 |
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COMM+ |
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TB2–1 |
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A |
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A |
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+ |
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2 |
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COMM– |
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– |
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B |
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B |
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*Note:Wiring backwards will result in product failure.
Pre-Installation Notes
1.All wiring must be in accordance with NEC and local building codes.
2.Do not run low-voltage wiring in the same conduit with high voltage power wiring.
3.Sharing the 24V Class 2-power source from the UCM is the preferred practice and simplifies installation. See wiring diagram above and wiring requirements under Item 4 at right. Use caution to be sure 24V and GND are connected to the proper terminals when connecting to the UCM.
4.If a separate 24V Class 2 power source is used to power the Digital Zone Sensor, terminalsTB1-2 (24V GND) and TB2-2 (Sensor GND) must be jumpered together at the sensor for the sensor to operate. However, the use of a transformer with a supply voltage of greater than 150V to ground as the separate 24V Class 2 power source is not recommended because its output should be grounded to building ground (following NEC requirements for Class 2 devices). This additional grounding can affect the operation and/or damage the Digital Zone Sensor.
5.The sensor display will not be enabled with 24V connection only. Sensor signal wiring to the UCM must be connected for the display to function.
WARNING
6.Sensor must be connected to a UCM and powered up for at least 1 hour to achieve maximum accuracy.
7.“Sensor Setpoint”output can not be verified with an ohm meter. Connection to a UCM is necessary to verify operation.
8.Plug holes through the wall behind the sensor to prevent undesirable airflow.
Model Diagram
2.8"
˚F
˚C
SETPOINT OVERRIDE
4.5" |
2.1" |
3.3" |
ON
CANCEL
Installation Instructions
1.Choose mounting location. Choose a spot on an interior wall near the return air grille about five feet above the floor. Air should circulate freely and be of average temperature for the zone. Avoid areas such as:
ybehind doors.
yon outside walls or walls facing uncontrolled areas.
yin direct sunlight or near sources of radiant heat that could affect temperature measurement.
yin-line with discharge air from unit being controlled.
2.Remove cover. Remove zone sensor cover by easing the tip of a small screwdriver into the top rear center slot closest to the wall. Gently move the top of the screwdriver towards you. Excessive force is not recommended for cover removal!
3.Mount base. Remove zone sensor cover from base and mount base on wall or 2 x 4 device box.
4.Connect wires. Connect wires as shown in the wiring diagram. For wire lengths less than 75 feet, an 18 gage, 5 or 6 conductor cable may be used. For wire lengths greater than 75 feet, use 18 gage, 2-conductor cable for the power wiring (TB1), and 18 gage, 3 conductor
cable for signal wiring (TB2). Avoid routing wires near sources of electrical noise such as motors, fluorescent lights, LAN wiring, etc. In some high noise environments, signal wires may require shielding.The communication jack should be wired with the cable appropriate for the system being installed.
5.Replace Cover. Place zone sensor cover back on the base and snap securely into place.
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.
© 2004 American Standard, Inc. All rights reserved
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