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Applications
The VMA18 Series programmable VAV box
controllers are intended for use as functional
replacements for the VMA1410, VMA1415, VMA1420,
and the VMA1440 controllers.
VMA1826 controllers are well-suited for commercial
zoning applications and can be used for pressure
dependent VAV box applications where no
differential pressure tranduser (DPT) is required.
Note: At Controller Configuration Tool (CCT)
13.0 or later, using Release Mode 10.1, VMA18
Series controllers can be configured as either
N2 devices or as standard BACnet
devices. This ability provides a potential cost-
effective protocol upgrade path for existing
customers and should be considered when you
install the controller.
Important: When you receive a VMA18 Series
controller from the factory or upgrade the
firmware or main code, the controller defaults
to using the MS/TP communications protocol.
The Load Summary screen of CCT shows the
connection as Wired Field Bus, indicating that
the MS/TP protocol is in use. If you have an N2
application, the Load Summary screen indicates
that you need to switch the communications
protocol to N2.
These VMA controllers feature an integral digital
pressure sensor, a damper actuator, and a 32-bit
microprocessor. The controller's small package size
facilitates quick field installation and efficient use
of space for field replacements, while still enabling
precision control performance.
Note: Connecting an IOM to the VMA via the SA
Bus connection is not supported.
For information about sensor compatibility and
replacement, see
Sensor replacement and reuse
scenarios.
VMA1826/1832 VAV Controller Installation Guide
MS/TP
®
North American emissions
compliance
United States
This equipment has been tested and found to
comply with the limits for a Class A digital device
pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference when this equipment
is operated in a commercial environment. This
equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in
accordance with the instruction manual, may cause
harmful interference to radio communications.
Operation of this equipment in a residential area
may cause harmful interference, in which case the
users will be required to correct the interference at
their own expense.
Canada
This Class (A) digital apparatus meets all the
requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la Classe (A) respecte
toutes les exigences du Règlement sur le matériel
brouilleur du Canada.
Installation
Observe these guidelines when installing a VMA18
Series controller:
• Transport the VMA controller in the original
container to minimize vibration and shock
damage to the VMA controller.
• Do not drop the VMA controller or subject it to
physical shock.
Parts included
• One VMA18 Series controller with removable N2/
FC bus terminal block
• One installation instructions sheet
• Two 6.35 mm x 6.35 mm (1/4 in. x 1/4 in. ) brass
fittings
Part No. 24-10143-373 Rev. K
2019-10-18
*2410143373K*
(barcode for factory use only)
MS-VMA1826-x, MS-VMA1832-x
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Table of Contents
Related Manuals for Johnson Controls VMA18 Series
Summary of Contents for Johnson Controls VMA18 Series
- Page 1 For information about sensor compatibility and replacement, see Sensor replacement and reuse scenarios. • One VMA18 Series controller with removable N2/ FC bus terminal block • One installation instructions sheet • Two 6.35 mm x 6.35 mm (1/4 in. x 1/4 in. ) brass...
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Page 2: Physical Features
Figure 1: VMA18 Series Controller Wiring Terminations and Physical Features Table 1: VMA18 Series Controller feature callout numbers and descriptions Physical features: description and references 24 VAC, Class 2 Supply Power Spade Terminals (see... - Page 3 Table 1: VMA18 Series Controller feature callout numbers and descriptions Physical features: description and references Binary Outputs, 24 VAC Triacs (see Table 4) Configurable Outputs: Voltage Analog Output (0–10 VDC) and Binary Output (24 VAC Triac) (see Table 4) Dual Port Fitting (see Figure 1) Not included in the VMA1826 model.
- Page 4 If mounting to the VAV box, make sure the screws do not 1. Place the VMA18 Series controller in the proper interfere with damper blade movement. mounting position on the damper shaft so that the wiring connections are easily accessible.
- Page 5 (for 90° VAV boxes). For 45° and 60° VAV ATTENTION boxes, the actuator stroke time must be adjusted. Refer to the Controller Tool Help (LIT-12011147) for instructions on setting Mise En Garde: Risque de dégâts matériels the actuator stroke time in the application. Faire pivoter le registre pour le placer en position d'ouverture complète avant de démarrer l'unité...
- Page 6 N2 Bus, refer to the N2 Communications Bus Technical Bulletin (LIT-636018). VMA terminals and bus ports See Figure 1 for input and output terminal and bus port locations on the VMA18 Series controllers. Observe the following guidelines when wiring a VMA18 controller. Input and Output terminals The input spade terminals are located on the side of the VMA near the N2/FC Bus terminal block.
- Page 7 VMA18 controller, connect the power wire from 24 VAC: 1 terminal on the existing controller to the HOT power terminal on To wire the VMA18 Series controller, complete the the VMA18. Also connect the power wire following steps: from the 24 VAC: 2 terminal on the existing 1.
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Page 8: Vma Terminal Functions, Ratings, Requirements, And Wiring Guidelines
® an offset in the input/output software setup. provides details for wiring inputs and outputs to the VMA18 Series controllers. See the figures in this Maximum cable length versus load section for the applicable termination diagrams. current Use Figure 13 to estimate the maximum cable length relative to the wire size and the load current (in mA) when wiring inputs and outputs. - Page 9 Table 2: Termination details Type of Input/ Type of field device Termination diagrams Output Voltage Input - Internal Source Voltage Input (Self- Powered) Temperature Sensor Dry Contact 0–10 VDC Output to Actuator (Internal Source) 0–10 VDC Output to Actuator (External Source) VMA1826/1832 VAV Controller Installation Guide...
- Page 10 Table 2: Termination details Type of Input/ Type of field device Termination diagrams Output 24 VAC Triac Output (Switch Low, External Source) Note: Only applies to CO4 and CO5. Incremental Control to Actuator (Switch Low, External Source) Note: Applies to CO4 and CO5. Analog Output (Voltage) 24 VAC Binary Output...
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Page 11: Vma Replacement Wiring Diagram
Table 2: Termination details Type of Input/ Type of field device Termination diagrams Output Network Stat with SA Bus Terminals Addressable Network Stat with Terminals (Fixed SA Bus Address = 199) VMA replacement wiring diagram supplies 24 VAC to these BOs. The VMA18 controller has two configurable outputs (COs) and these two COs require an external low voltage power source. -
Page 12: Sensor Replacement And Reuse Scenarios
Figure 9: VMA Replacement Wiring Diagram Sensor replacement and reuse scenarios This section describes sensor replacement and reuse scenarios for replacing a VMA1410, VMA1415, VMA1420, or the VMA controller with VMA18 controllers. See Table 3 for a description of the most popular sensor models used with the VMA1410, VMA1415, VMA1420, and the VMA controllers, the sensor replacement and reuse scenarios for that sensor... -
Page 13: Sensor Replacement And Reuse Scenarios Table
Sensor replacement and reuse scenarios table Table 3: Sensor replacement and reuse scenarios Sensor used with VMA1410, VMA1415, Sensor replacement and reuse scenarios Instructions VMA1420, VMA1440 Controller Replace a sensor with an NS Series Sensor Note: Replacing a TE-6xxx Series TE-6xxx Series (see TE-6xxx series sensor Sensor is recommended over reusing... - Page 14 Metasys Release 10.0 controllers use CCT Figure 10: Single-Socket Adapter Release mode 10.4, therefore BTCVT is not supported with these controllers. Replacing a TE-6xxx series sensor To replace a TE-6xxx Series Sensor with a functionally equivalent NS Series Network Sensor, complete the following instructions. Note: •...
- Page 15 Replacing a TE-7710-0 Series Wireless 3. Plug the 8-pin male jack on the Y adapter into the VMA18 controller socket labeled TSTAT Transmitter and TE-7720-0 Wireless (Figure 12). Receiver connected to a VMA Controller 4. Plug the BTCVT into the 6-pin socket on the Y To replace a TE-7710-0 Series Wireless Transmitter and TE-7720-0 Wireless Receiver connected to a VMA adapter.
- Page 16 TE-700 Series Sensor connected to a Reusing a TE-700 Series sensor VMA Controller See the instructions in this section to reuse a TE-700 Series Sensor when connected to a VMA18 To replace a TE-700 Series Sensor with a TE-730 controller. Series Sensor, follow the instructions in Replacing a 1.
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Page 17: Input And Output Wiring Guidelines Tables
Internal 75k ohm Pulldown Analog Input - Resistive Mode (0–600k ohm) Internal 12 V, 15k ohm pull up Qualified Sensors: 0–2k potentiometer, RTD (1k Nickel [ Johnson Controls sensor], See Guideline A in Table 5. UNIVERSAL 1k Platinum, and A99B Silicon Temperature Sensor) - Page 18 Table 4: I/O terminal blocks, functions, ratings, requirements, and cables To determine wire size and Terminal block label Terminal labels Function, ratings, and requirements maximum cable length Analog Output - Voltage Mode (0–10 VDC) 10 VDC maximum output voltage See Guideline A in Table 5. 10 mA maximum output current External 1k to 50K ohm load required Binary Output 24 VAC Triac...
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Page 19: Communication Bus And Supply Power Table
Communication bus and supply power table Table 6: Communication bus and supply power terminal blocks, functions, ratings, requirements, and cables Function, electrical ratings/ Terminal block/Port label Terminal labels Recommended cable type Requirements N2/FC Bus Communications Signal Reference (Common) for bus N2/FC BUS Use existing cable or 18 AWG communications... - Page 20 21, set Switch 16 to ON first, cause a smaller field device range. then set Switch 4 to ON, followed by Switch 1 If the VMA18 Series controller may eventually be (16+4+1=21). See Figure 14. converted to MS/TP, use addresses 4 through 127 for a wired VMA controller or addresses 132 3.
- Page 21 Note: Refer to the N2 Communications • CCT 10.3 auto-detects when BTCVT can be Bus Technical Bulletin (LIT-636018) for the used or not, based on the controller model N2 bus EOL termination rules. Refer to and the corresponding CCT Release mode. the MS/TP Communications Bus Technical •...
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Page 22: Troubleshooting
Troubleshooting problem is when the 24 VAC power supply on the VMA is reversed but not reversed on a Table 8 provides LED status indicator information connected secondary device. Improper wiring for troubleshooting the VMA18 controller. of this power terminal may cause a short circuit across the 24 VAC power supply on -1 models. -
Page 23: Led And Accessories Tables
The MAP Gateway serves as a replacement for the BTCVT, which is no longer available for purchase, but continues to be supported on select controllers. Repair information If the VMA18 Series controller fails to operate within its specifications, replace the unit. For a replacement unit, contact the nearest Johnson Controls representative. - Page 24 VMA1832 Technical Specifications Table 10: VMA1832 Controllers MS-VMA1826-x, MS-VMA1826-xG: 32-bit, Integrated VAV Controller and Actuator, 3 UI, 3 BO, and 2 CO; 24 VAC; FC Bus, and SA Bus; Includes cable adapters for use when replacing VMA14xx Series controllers. Recommended replacement for VMA1440 controller (No DPT).
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Page 25: Product Warranty
UL Listed, File E107041, CCN PAZX7, CAN/CSA C22.2 No. 205, Signal Equipment; Industry Canada Compliant, ICES-003 Europe: CE Mark – Johnson Controls, Inc., declares that this product is in compliance with the essential requirements and other relevant provisions of the EMC Directive 2004/108/EC. Australia and New Zealand: RCM Mark, Australia/NZ Emissions Compliant. - Page 26 © 2019 Johnson Controls. All rights reserved. All specifications and other information shown were current as of document revision and are subject to change without notice. www.johnsoncontrols.com...
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