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Summary of Contents for Johnson Controls NXA-VAV-01
- Page 1 NXA-V NXA-V NXA-V A A A A A V-01 V-01 V-01 V-01 NXA-V NXA-V V-01 VARIABLE AIR VOLUME CONTROLLER Installation Guide TEC DOC # LIT-TD-2001 09/2001...
- Page 2 The documentation contained in this publication is the exclusive property of Johnson Controls, Inc., and its use is restricted to the licensed software with which it is furnished. This publication may not be used for any other purpose without the express written consent of Johnson Controls, Inc.
- Page 3 • Disconnect and remove any unused cables that may be acting as a transmission source. • Make certain that the computing device is plugged into a grounded outlet receptacle. If necessary, contact Johnson Controls, Inc., for additional sugges- tions.
- Page 4 SYMBOLS Installation Guide VAV-01 Controller NexSys This is the symbol for Electro-Static Discharge. Electro-Static Discharge (ESD) can damage certain electronic devices. ESD is a transfer of electrostatic charge between bodies at different electrostatic potentials caused by direct contact or induced by a electrostatic field.
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Page 5: Table Of Contents
NexSys VAV-01 Controller Installation Guide Table of Contents VAV-01 Overview ..................6 Inspection ....................7 Requirements ....................7 Location ...................... 7 Mounting ..................... 8 Airflow Sensor Connections ............9 Wiring Connections ................... 11 Power Supply ..................... 11 Power Connections ................11 Thermistor Wiring ................ -
Page 6: Vav-01 Overview
Installation Guide VAV-01 Controller NexSys VAV-01 OVERVIEW The JCI VAV-01 Controller consists of a Variable Air Volume (VAV) controller integrated with a velocity pressure sensor. It provides pressure dependent/independent cooling control for fan powered VAV terminal boxes with or without reheat capacity. The VAV-01 Controller is a 4”x 6”... -
Page 7: Inspection
NexSys VAV-01 Controller Installation Guide INSPECTION Inspect the carton for possible damage. If damaged, notify the appropriate carrier immediately. Inspect the components for obvious damage. Contact Electronic Systems USA before returning damaged products. REQUIREMENTS • Job wiring diagrams. • Tools (not provided): - Appropriate screwdrivers for wiring terminals and mounting screws. -
Page 8: Mounting
Installation Guide VAV-01 Controller NexSys DOES NOT EXCEED 85% OR FALL BELOW 5%, NON-CONDENSING. MOUNTING The JCI VAV-01 Controller can be mounted in any direction and on any plane. Mounting dimensions are 4”x6” overall board size for snap-track mounting. For applications requiring mounting using standoffs the .150”... -
Page 9: Airflow Sensor Connections
NexSys VAV-01 Controller Installation Guide Figure 2. Mounting dimensions . AIRFLOW SENSOR CONNECTIONS Use either 1/4 in. O.D. FRPE polyethylene tubing or 1/8 in. I.D. Tygon tubing for piping connections. Maximum run of tubing is 5 feet. 1. Remove the yellow plastic fitting caps from the barbed fittings of the VAV-01 airflow sensor inputs. - Page 10 Installation Guide VAV-01 Controller NexSys OUT TEST RESET Service (LO) (HI) GND DO5 DO4 D03 STAT- STAT+ NET - NET + HOT NEU THERM TEMP 24VAC To HIGH pressure fitting on the airflow sensor. To LOW pressure fitting on the airflow sensor. Figure 3.
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Page 11: Wiring Connections
NexSys VAV-01 Controller Installation Guide WIRING CONNECTIONS POWER SUPPLY Use a UL ® listed Class 2 power transformer supplying a nominal 24 VAC (+/- 10%). The supply to the transformer must be provided with a breaker or disconnect. ® NOTE : The UL listed Class 2 power transformer may be used to power multiple UL ®... -
Page 12: Thermistor Wiring
Installation Guide VAV-01 Controller NexSys RESET Service HOT NEU 24VAC 24VAC HOT NEUTRAL CHASSIS GROUND Figure 4. Power Connections. THERMISTOR WIRING The Thermistor wiring to the VAV-01 is shown in Figure 5 below: NOTE: Only a 10K Type II (CP Curve) thermistor may be used. OUT TEST GND DO5 DO4 D03 THERM... -
Page 13: Digital Outputs
NexSys VAV-01 Controller Installation Guide Figure 5. Thermistor Wiring. DIGITAL OUTPUTS Digital outputs shown in Figure 6 below must be wired as follows: • DO1 must be wired to Damper Increment. • DO2 must be wired to Damper Decrement. • DO3 must be wired to the fan, if one is used. •... -
Page 14: Digital Outputs Do-1 And Do-2 - Damper Wiring
Installation Guide VAV-01 Controller NexSys THERM TEMP DAMPER INCREMENT DAMPER DECREMENT REHEAT 1/ INCREMENT/PWM REHEAT 2/ DECREMENT Figure 6. Digital Outputs. DIGITAL OUTPUTS DO-1 AND DO-2 - DAMPER WIRING... -
Page 15: Digital Output Do-3 - Fan Wiring
NexSys VAV-01 Controller Installation Guide Wiring for Damper Activator Motor Increment and Decrement is shown in Figure 7 below: NOTE: The rating for these outputs is 0.5 amps at 24VAC. THERM TEMP DECREMENT 24VAC COMMON BELIMO NM24 INCREMENT Made in Switzerland LR 92800 LISTED 24 VAC/DC... -
Page 16: Digital Output Do-4 And Do-5 - Electric Staged Reheat
Installation Guide VAV-01 Controller NexSys THERM TEMP = RELAY 24VAC HOT Figure 8. Fan Wiring. DIGITAL OUTPUT DO-4 AND DO-5 - ELECTRIC STAGED REHEAT Wiring for Staged Reheat is shown in Figure 9 below:... - Page 17 NexSys VAV-01 Controller Installation Guide Digital Outputs DO-4 and DO-5 can also be used for Floating Reheat or Pulse Width Modulation. If you are using two stage reheat, each heating element is wired to a digital output. If three heating elements are used for three stage reheat, the first element is wired to DO-4, and the second and third elements are wired to DO-5.
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Page 18: Digital Output Do-4 And Do-5 - Floating Reheat
Installation Guide VAV-01 Controller NexSys THERM TEMP = RELAY 24VAC Two Wire Reheat Three Wire Reheat DO4 (R1) Heating Element 1 Heating Element2 DO5 (R2) Heating Element 2 Heating Element 2 & 3 NOTE: This applies to two and three stage electric reheat. Figure 9. -
Page 19: Digital Output Do-4 And Do-5 - Pulse Width Modulation
NexSys VAV-01 Controller Installation Guide THERM TEMP INCREMENT 24VAC HOT COMMON DECREMENT Figure 10. Floating Reheat. DIGITAL OUTPUT DO-4 AND DO-5 - PULSE WIDTH MODULATION Pulse Width Modulation uses the DO-4 and is shown in Figure 11 below. DO5 is a spare output when Pulse Width Modulation is used. NOTE: The rating for these outputs is 0.5 amps at 24VAC. -
Page 20: Warranty
MENT. DIRECT, INDIRECT, SPECIAL, INCIDEN- The original purchaser must notify TAL, OR CONSEQUENTIAL DAMAGES Johnson Controls, Inc., in writing if there ARISING OUT OF THE USE OF THIS is a defect in material or workmanship. PRODUCT. Written notice in all events must be received by Johnson Controls, Inc.
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