Johnson Controls VMA1200 Series Technical Bulletin

Variable air volume modular assembly

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Variable Air Volume Modular Assembly (VMA) 1200 Series

Overview and Engineering Guidelines

VMA1200 Series Overview and Engineering Guide ......................... *3

Introduction........................................................................................................*3

Key Concepts.....................................................................................................*4

VMA1200 Series Models ............................................................................................... *4

Definition of Terms ........................................................................................................ *6

Theory of Operation....................................................................................................... *9

Establish Zones.............................................................................................................12

Room Sensor Placement...............................................................................................12

Pressure Independent VMA...........................................................................................13

VMA Airflow Rate ........................................................................................................ *13

Power Source.............................................................................................................. *14

Network Topology..................................................................................... *17

ORKS

Inputs and Outputs ...................................................................................................... *19

CablePRO ................................................................................................................... *21

CVTPRO ..................................................................................................................... *21

Software Tools ............................................................................................................ *21

Related Documentation ............................................................................................... *22

Procedure Overview......................................................................................... 23

Detailed Procedures........................................................................................*24

Determining VAV Box Requirements........................................................................... *24

Establishing the Room Schedule ...................................................................................25

Developing Bills of Material and Placing Orders ............................................................26

Configuring the VMA .....................................................................................................27

*Indicates those sections where changes have occurred since the last printing.

Code No. LIT-1162350

ECHNICAL

ULLETIN

Systems Manual

ORKS

VMA1200 Section

Issue Date

www.johnsoncontrols.com

1162

0501

Table of Contents

Summary of Contents for Johnson Controls VMA1200 Series

Page 1: Table Of Contents
0501 ECHNICAL ULLETIN Variable Air Volume Modular Assembly (VMA) 1200 Series Overview and Engineering Guidelines VMA1200 Series Overview and Engineering Guide ......*3 Introduction......................*3 Key Concepts.....................*4 VMA1200 Series Models ....................*4 Definition of Terms ......................*6 Theory of Operation....................... *9 Establish Zones......................12...
Page 2 VMA1200 Appendix A: Reference Information ..........*28 Introduction....................... 28 VMA Wiring List......................*29 VMA Wiring Interface Diagram ..................*31 VMA Parts List......................*32 FCC Part 15 Label......................33 VMA Specifications ..................... *34 Fabricating Your Own Interconnection Cable............... *38 Sensor Interface ......................*39 Appendix B: Application Example ..........
Page 3: Vma1200 Series Overview And Engineering Guide
This manual is a reference tool for engineering VMA1200 installations and applications. It is also a training tool to learn about the VMA1200 Series controllers. It is task oriented for easy reference to specific tasks. Refer to the appendixes at the end of this document for wiring tables and diagrams, a parts list, specifications, and an application example.
Page 4: Key Concepts
VMA1200 Key Concepts VMA1200 Series Models Table 1 lists VMA1200 Series features. Table 2 shows available VMA1200 models. Table 1: Feature Checklist VMA Features Comments Applications Pattern Recognition Adaptive Control (PRAC) Eliminates manual tuning and seasonal retuning. on Zone Proportional Plus Integral (PI)
Page 5 VMA1200 Series Overview and Engineering Guidelines VMA Features (Cont.) Comments Differential Pressure Transducer Dead Ended Transducer No filters or maintenance required. Capacitive Technology Improved stability Industry Accepted Flow Measurement Even for flows below 250 fpm (1.25 m/s) typical Accuracy Temperature Sensors Variety of Sensors Nickel, 1K platinum, 2.25K NTC...
Page 6: Definition Of Terms
VMA1200 Table 2: VMA1200 Series Models Inputs/Outputs Points Rating VMA1210 VMA1220 (Cooling (Cooling Only) w/Reheat) Analog Inputs: Zone Temperature AI-1 1K Ni or Pt or 2.25K NTC Zone Setpoint AI-2 1.6K ohm Potentiometer (Pot.) Humidity, Dewpoint, or Sideloop AI-3 0-10 VDC...
Page 7 VMA1200 Series Overview and Engineering Guidelines Configuring Building an application within the controller to establish the required control sequence, setting the functionality of the controller. Downloading Writing the Heating, Ventilating, and Air Conditioning (HVAC) application data and configuration properties to the controller. This is accomplished using a software tool with a Personal Computer (PC).
Page 8 VMA1200 Test and Balance (TAB) Test and Balance (TAB) is a function performed to ensure the installed system operates to design specifications. Balancing of the VMA zone indicates whether the VAV terminal box achieves minimum/maximum airflow settings. TAB must also be performed for the air handler and the air duct distribution to the VAV box.
Page 9: Theory Of Operation
VMA1200 Series Overview and Engineering Guidelines Theory of Operation VAV systems are most easily understood by considering them as cooling applications. As the zone temperature increases due to heat produced by people, computers, or other heat sources, the VMA opens the VAV box damper and lets cooler air in.
Page 10 VMA1200 N1 LAN Network Control Module (NCM) ORKS Network Operator Workstation (with OWS, M-Pro, and LNS Software) ORKS Compatible Devices VMA1200 VMA1200 Zone Room FTT-10 Sensor Palm Compatible Zone Handheld Device CablePRO CVTPRO Converter Room Converter Sensor Palm Compatible Handheld Device MNET Figure 1: VMA1200 Controllers in Metasys Network Diagram...
Page 11 VMA1200 Series Overview and Engineering Guidelines Network ORKS FTT-10 Interface Neuron TE-6700, TMZ1600, or Phone Window Open Application Palm Compatible Jack Digital Processor Handheld Device Occupancy Sensor Inputs Temp Occ Button Zone COP8 IO Processor Space Temperature Analog Output Heating Valve...
Page 12: Establish Zones
VMA1200 Establish Zones When designing VMA systems, establishing zones correctly is critical to take maximum advantage of the VMA’s exceptional accuracy and rapid response capabilities. The designer strives for the most uniform indoor environmental conditions possible. A single thermostatic device (room sensor) controls each area.
Page 13: Pressure Independent Vma
VMA1200 Series Overview and Engineering Guidelines Pressure Independent VMA The pressure independent VMA employs patented self-tuning, cascaded proportional/integral control loops. The zone temperature loop samples space temperature and resets the airflow setpoint between the minimum and maximum flow settings. Since inlet duct...
Page 14: Power Source
VMA1200 Power Source You can use one 24 VAC power trunk to power multiple VMAs. In this case, transformers of up to 100 VA are centrally located, and the secondary run is without conduit and without concern about polarity. Notes: The 24V power transformer must be UL/CSA listed as NEC Class 2 Power Limited.
Page 15 VMA1200 Series Overview and Engineering Guidelines When using a single transformer and running 24 VAC to multiple VMAs, use a wire gauge large enough for the load. The voltage drop on the 24 VAC cabling is much higher than for line voltage wiring for the same power draw.
Page 16 VMA1200 Table 4 and Table 5 indicate the relationship between wire length and power at the end of wires. Table 4: Maximum Wire Length for Given Power/Gauge (U.S. Measurements) Wire Size 8 Gauge 10 Gauge 12 Gauge 14 Gauge 16 Gauge 18 Gauge Power (VA) at Wire Length (Feet)
Page 17: Lon Works Network Topology
VMA1200 Series Overview and Engineering Guidelines Network Topology ORKS The L FTT-10A used by the VMA1200 supports free ORKS network topologies. Table 6 describes free topologies, and Figures 4 and 5 show supported topologies. For more information, see the Network Layout Technical Bulletin (LIT-1162150).
Page 18 VMA1200 Daisy-chained Topology Stub-wired Topology Legend: Compatible Device ORKS (Including NCM350/361) Bus End-of-Line (EOL) Terminator Bus_Top Figure 5: Bus Topology Table 7 contains a specification example for the FTT-10A Transceiver. This is just one example of the many available wiring styles. For more complete information, refer to Echelon...
Page 19: Inputs And Outputs
VMA1200 Series Overview and Engineering Guidelines Inputs and Outputs For specific input/output range, wire length, wire size issues, refer to the VMA Wiring List in Appendix A: Reference Information at the back of this document. Note: All terminals are spade lug type except the L ORKS Network Bus terminals, which are removable screw terminals.
Page 20 Zone Bus The Zone Bus is a 2-wire local communications bus that allows a Palm compatible handheld device with Johnson Controls VMA1200 Balancing Tool (VBT) software to commission and balance the VMA. The Zone Bus connector also provides 15 VDC power to the CablePRO or CVTPRO.
Page 21: Cablepro
VMA1200 Series Overview and Engineering Guidelines CablePRO CablePRO (AS-CBLPRO) is an interface device used between a Palm compatible handheld device and the VMA. It is used for box balancing or commissioning via the Zone Bus communication port. When used with a VMA, the CablePRO is strictly an electrical interface between the serial RS-232 port of the Palm compatible handheld device and the Zone Bus.
Page 22: Related Documentation
Table 9 lists related VMA1200 documentation. Table 9: Related Documentation For Information on This Use This Document: Sales and Marketing VMA1200 Series Controller Product Bulletin (LIT-1162300) in the information Metasys Network Sales Resource Manual (FAN 635) and the L ORKS Systems Manual (FAN 1162) Installing the VMA VMA1200 Installation Bulletin, Part No.
Page 23: Procedure Overview
VMA1200 Series Overview and Engineering Guidelines Procedure Overview Table 10: Engineering the VMA Procedure Overview To Do This Follow These Steps: Determine VAV Box Select the VMA. Requirements Establish sensor placement in zones. Coordinate and authorize mounting. Establish the Room Schedule Develop application configuration files.
Page 24: Detailed Procedures
VMA1200 Detailed Procedures Determining VAV Box Requirements To determine VAV box requirements: Select the VMA based on control sequence, Input/Output (I/O), side loops, and flow measurement accuracy requirements for single duct boxes. Refer to the discussion of VMA Airflow Rate in the Key Concepts section of this document.
Page 25: Establishing The Room Schedule
Determine control strategy. Note: The VMA1200 is for single duct applications only. Use other standard Johnson Controls VAV controllers for dual duct and supply/exhaust applications. Select appropriate room sensors based on project specifications. Typically, each VMA requires a room sensor.
Page 26: Developing Bills Of Material And Placing Orders
• cables • transformers • box fan speed controllers - for information about the Johnson Controls S66 Series Electronic Fan Speed Control, refer to the S66 Series Electronic Fan Speed Control Product/Technical Bulletin (LIT-121605) Part No. 24-8374-8 in the Installation Sheets Manual (FAN 121).
Page 27: Configuring The Vma
VMA1200 Series Overview and Engineering Guidelines Configuring the VMA Configure the VMA as specified in room schedules. To configure the VMA: Refer to the appropriate room schedule for room specifications. Select control sequences using M-Pro software. Refer to M-Pro User’s Guide (LIT-693300).
Page 28: Appendix A: Reference Information
VMA1200 Appendix A: Reference Information Introduction The following tables are to be used for wiring, parts, and specification reference.
Page 29: Vma Wiring List
VMA1200 Series Overview and Engineering Guidelines VMA Wiring List Table 11 provides a wiring list for the VMA1200. Figure 6 highlights the electronic isolation of the VMA1200. Note: All field terminals are power limited when powered by a Class 2 transformer.
Page 30 VMA1200 Point Description Range Input or Maximum Maximum Wire Size in Cable (Cont.) Load Voltage Current or mm Length Impedance (AWG) Meters (Feet) BO-1, Fan, Box/ 24 VAC @ 48-1000 ohm 30 VAC 100 mA 1.5 mm (18) 150 (500) 2,3,4,5^ Supplemental 25-500 mA...
Page 31: Vma Wiring Interface Diagram
VMA1200 Series Overview and Engineering Guidelines VMA Wiring Interface Diagram SHLD Figure 7: VMA Wiring Interface...
Page 32: Vma Parts List
VMA1200 VMA Parts List Table 12 lists hardware accessories. Table 13 lists software requirements and options. Table 12: Hardware Accessories (Order Separately) Transformer AS-XFR050 AS-XFR100 Y63 through Y66 Series Screw Terminal Kit AP-TBK1002-0 Removable 2-position screw terminal kit (100 pcs)* AP-TBK1003-0 Removable 3-position screw terminal kit (100 pcs)* AP-TBK3COMM-0...
Page 33: Fcc Part 15 Label
VMA1200 Series Overview and Engineering Guidelines FCC Part 15 Label This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of Federal Communications Commission (FCC) rules. These limits are designed to provide reasonable protection against harmful interference when this equipment is operated in a commercial environment.
Page 34: Vma Specifications
Shipping Weight Analog Inputs: (Input configurations vary based on model type) Electrical Inputs - Nickel (1K ohm Johnson Controls), or Platinum (1K ohm DIN 385) or NTC (2.25K ohm Fenwal) room sensors - 1.6K ohm setpoint potentiometer (2-wire) - Voltage Input for 0 to 10 VDC (humidity, dewpoint sensor, or sideloop)
Page 35 VMA1200 Series Overview and Engineering Guidelines All specifications are for the VMA controller pressure sensor and actuator only, measured at the midpoint of each range within 90 days of calibration at room temperature. Table 15: Additional Detailed VMA Specifications Power Input Voltage Range 20 to 30 VAC;...
Page 36 VMA1200 Additional Specifications (Cont.) Temperature Inputs (AP-VMA only for AI-4) 1220 (AI-1, AI-2, AI-4) Range NTC: 0 to 40°C (32 to 104°F) Platinum: 0 to 40°C (32 to 104°F) Nickel: 0 to 40°C (32 to 104°F) Setpoint: 18 to 30°C (65 to 85°F) Resolution (13 bit) NTC: 0.0028°C (0.0050°F)
Page 37 VMA1200 Series Overview and Engineering Guidelines Additional Specifications (Cont.) (AP-VMA1220 only) Analog Output (AO-1) Voltage Range 0 to 10 VDC Load Current 0 to 10 mA Voltage Resolution 0.04 VDC (8 bit) Linearity and Hysteresis ±0.04 VDC maximum Voltage Accuracy ±3% full scale...
Page 38: Fabricating Your Own Interconnection Cable
VMA1200 Fabricating Your Own Interconnection Cable You must construct any fabricated interconnection cable, so the same color wire on both ends of the cable align with Pin 1 in the plug. This provides a consistent field assembly of the cable. Figure 8 illustrates the interconnection cable.
Page 39: Sensor Interface
VMA1200 Series Overview and Engineering Guidelines Sensor Interface Figures 9, 10, and 11 show interfaces between room sensors and the VMA1200. For more information on the TE-6700 room sensor (including Dual Inline Package (DIP) switch settings), see the TE-6700 Series 2nd Generation Temperature Elements Installation Bulletin (LIT-216332).
Page 40 VMA1200 (18) BI-1* (19) COM (20) BI-2 (21) COM (22) BI-3 (23) COM COM AI2 (24) +15 VDC (25) +15 VDC (26) AI-1 (27) COM (28) AI-2 (29) COM BI-1 ZB+ COM 15 VDC (30) AI-3 (31) COM (32) AI-4 (33) COM (34) ZB+ (35) ZB-...
Page 41 VMA1200 Series Overview and Engineering Guidelines TE-7000 (Europe Only) Terminal Blocks (TBs) (18) BI-1 (19) COM (20) BI-2 (21) COM (22) BI-3 (23) COM (24) +15 VDC (25) +15 VDC (26) AI-1 (27) COM (28) AI-2 (29) COM (30) AI-3...
Page 42: Appendix B: Application Example
VMA1200 Appendix B: Application Example This example is provided as a basic overview of wiring locations you might expect to see. It does not define all applications available or all of the possible questions and answers. For more information on VMA1200 applications, see the Variable Air Volume Modular Assembly (VMA) 1200 Series Controllers Application Note (LIT-1162500).
Page 43 VMA1200 Series Overview and Engineering Guidelines Table 17: Single Duct Application Example Bill of Materials Component Description Part Number C1, DPT1, DA1 AP-VMA1220-0 Temperature Sensor and Setpoint TE-6700 Series R2, R3 Reheat Relays * Box OEM manufacturers typically furnish fan relays and electric heat relays.
Page 44 VMA1200 Notes www.johnsoncontrols.com Controls Group FAN 1162 507 E. Michigan Street Systems Manual ORKS P.O. Box 423 Release 1.0 Milwaukee, WI 53201 Printed in U.S.A.

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Johnson Controls VMA1200 Series Technical Bulletin

VMA1200 Series Overview and Engineering Guide

Introduction

Key Concepts

Procedure Overview

Detailed Procedures

Appendix A: Reference Information

Introduction

Appendix B: Application Example

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Summary of Contents for Johnson Controls VMA1200 Series

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