Johnson Controls VMA 1200 Series Mounting And Wiring Instruction
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Johnson Controls VMA 1200 Series Mounting And Wiring Instruction

Johnson Controls VMA 1200 Series Mounting And Wiring Instruction

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Mounting and Wiring VMA1200 Series Controllers
Introduction......................................................................................................... 2
Key Concepts...................................................................................................... 3
VMA Position and Orientation ........................................................................................... 3
Determine and Set Damper Polarity ................................................................................. 3
Wiring and Cabling Precautions........................................................................................ 4
VMA Internal Schematic Diagram ..................................................................................... 6
Phone Jack Polarization.................................................................................................... 8
Detailed Procedures......................................................................................... 10
Preparing the VMA for Mounting ..................................................................................... 10
Mounting the VMA........................................................................................................... 11
Setting the Damper Position ........................................................................................... 12
Wiring the VMA ............................................................................................................... 14
© 2003 Johnson Controls, Inc.
Code No. LIT-1162360
Network Bus........................................................................ 15
Technical Bulletin
Issue Date
July 1, 2003
www.johnsoncontrols.com
M-Tool Release 5.3

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  • Page 1: Table Of Contents

    Preparing the VMA for Mounting ..................10 Mounting the VMA......................11 Setting the Damper Position ................... 12 Wiring the VMA ....................... 14 Connecting the L Network Bus................ 15 ORKS © 2003 Johnson Controls, Inc. www.johnsoncontrols.com Code No. LIT-1162360 M-Tool Release 5.3...

  • Page 2: Mounting And Wiring Vma1200 Series Controllers

    Mounting and Wiring VMA1200 Series Controllers Technical Bulletin Mounting and Wiring VMA1200 Series Controllers Introduction The integrated Variable Air Volume Modular Assembly (VMA), which is a controller/actuator/pressure sensor, mounts on the Variable Air Volume (VAV) terminal box and fastens to the damper shaft. Instructions for wiring the VMA and its accessory devices are also provided in this document.

  • Page 3: Key Concepts

    Mounting and Wiring VMA1200 Series Controllers Technical Bulletin Key Concepts VMA Position and Orientation Note: Extra mounting brackets, linkage, or couplers are not required for standard mounting. Consider the following when positioning and orienting the VMA: • Mount the VMA on a vertical and flat surface where it functions best, such as the side of the VAV box.

  • Page 4: Wiring And Cabling Precautions

    Mounting and Wiring VMA1200 Series Controllers Technical Bulletin To change the damper polarity, set the Damper Polarity configuration property to Reverse, using a Palm™ compatible handheld device (Version 2.0 or higher operating system) with the VMA1200 Balancing Tool (VBT) software, the Comm Pro commissioning tool, or a L Network Services (LNS™) ORKS...
  • Page 5 Mounting and Wiring VMA1200 Series Controllers Technical Bulletin • Do not run L Network Bus, Zone Bus, ORKS Analog Input (AI), Binary Input (BI), Analog Output (AO), or Binary Output (BO) wiring in the same conduit as line voltage wiring (above 30 VAC), or with wiring that switches power to highly inductive loads such as contactors, coils, motors, or generators.

  • Page 6: Vma Internal Schematic Diagram

    Mounting and Wiring VMA1200 Series Controllers Technical Bulletin VMA Internal Schematic Diagram Figure 1 is a key diagram showing the different regions of the larger schematic diagram in Figure 2. This detailed diagram displays the following elements as shown in the key diagram below: Isolated Power Supply Earth Ground Connection Airflow and High Temperature Safety Switches...
  • Page 7 Mounting and Wiring VMA1200 Series Controllers Technical Bulletin = Optical or Earth ground is required Magnetic by NEC if primary is Isolation greater than 150 VAC. 24 VAC Primary Synchronous Motor 24 VAC (Actuator) Manual High Reset Temperature +15V +15 VDC BCOM 0.01 uF OPTO...

  • Page 8: Phone Jack Polarization

    Mounting and Wiring VMA1200 Series Controllers Technical Bulletin Phone Jack Polarization The figure below illustrates the polarization of the 6-pin and 8-pin phone jacks on the VMA or room sensor. Pin 1 is to the extreme left as you face the jack opening, tab notch down. If you need to create your own cable, refer to Fabricating Your Own Interconnection Cable in Appendix A: Reference Information located in the Variable Air Volume Modular Assembly (VMA) 1200 Series...
  • Page 9 Mounting and Wiring VMA1200 Series Controllers Technical Bulletin Table 2: TE-6700 Phone Jack Pinouts 8-Pin Jack 6-Pin Jack Signal Signal Heating Setpoint or LED and Manual Not Used Override Setpoint (Cooling) +15 VDC Temperature Sensor Temperature Sensor Common Not Used +15 VDC Zone Bus Power Common or Zone Bus Common...

  • Page 10: Detailed Procedures

    Mounting and Wiring VMA1200 Series Controllers Technical Bulletin Detailed Procedures Preparing the VMA for Mounting To prepare the VMA for mounting: Check that you have the following equipment: • VMA • TE-6700, TE-7000 (Europe only), or the TMZ1600 room sensor •...

  • Page 11: Mounting The Vma

    Mounting and Wiring VMA1200 Series Controllers Technical Bulletin Mounting the VMA To mount the VMA: Place the VMA in the desired mounting position on the damper shaft so the wiring terminals are easily accessible. To allow space for VMA movement during damper rotation, locate the shoulder washer at the center of the slot.

  • Page 12: Setting The Damper Position

    Mounting and Wiring VMA1200 Series Controllers Technical Bulletin Setting the Damper Position To set the damper position: Locate the damper position. The following figure shows three possible icons on the end of the damper shaft. damposit Figure 5: Typical Damper Shaft End Icons Grasp the damper shaft firmly with a pliers and manually position it to fully closed (icon perpendicular to airflow) for 90°...
  • Page 13 Mounting and Wiring VMA1200 Series Controllers Technical Bulletin Tighten the set screw to the shaft using a 8 mm (5/16 in.) wrench or 10 mm (3/8 in.) 12 point socket wrench. Tighten to 17 to 21 N⋅m (150 to 180 lb⋅in [14 lb⋅ft]). Default configuration for the VMA is 90°...

  • Page 14: Wiring The Vma

    Mounting and Wiring VMA1200 Series Controllers Technical Bulletin Wiring the VMA All field wiring, with the exception of the L Network Bus, ORKS must be kept in the same room with the controllers, to comply with UL smoke control requirements. Refer to the Metasys Smoke Control Wiring Technical Bulletin (LIT-636331) for details on smoke control requirements.

  • Page 15: Connecting The Lon Works Network Bus

    A doubly terminated bus gives the greatest wiring distance and requires two terminators on each FTT-10 segment. Free topology requires only one terminator. Contact Johnson Controls® customer service at 1-800-275-5676, for more information about L network needs. ORKS...
  • Page 16 Mounting and Wiring VMA1200 Series Controllers Technical Bulletin Shield To Next To Next LON A ORKS ORKS Compatible LON B Compatible Device Device or NCM NCMConnect Figure 9: Connecting the VMA to an NCM Apply power. Locate and observe the VMA LEDs. See Tables 7 and 8 for details on the Service and Running LED.
  • Page 17 Mounting and Wiring VMA1200 Series Controllers Technical Bulletin SHLD Figure 11: Connections to VMA1200 Series Controllers...
  • Page 18 Mounting and Wiring VMA1200 Series Controllers Technical Bulletin Table 7: Service LED Color Name State Description Service Controller is operating properly (lights momentarily on power up and when service pin is pressed). Blinking Unconfigured. Use a network management tool to configure into a network or download new firmware.

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