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VMA1826/1832 VAV Controller Installation Instructions
MS-VMA1826-x, MS-VMA1832-x
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: With CCT Release 10.1 and higher, VMA18 Series
controllers can be configured as either N2 devices
or as BACnet® MS/TP 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 10.1 and above
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 (VMA1832 model only), 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 Instructions
Part No. 24-10143-373, Rev. J
Refer to the
QuickLIT website
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
Issued September 2018
for the most up-to-date version of this document.
1
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Table of Contents
Related Manuals for Johnson Controls VMA18 Series
Summary of Contents for Johnson Controls VMA18 Series
- Page 1 Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful Note: With CCT Release 10.1 and higher, VMA18 Series interference when this equipment is operated in a controllers can be configured as either N2 devices commercial environment.
-
Page 2: Materials And Special Tools Needed
3.5 mm (9/64 in.) drill bits to mount controller. the VMA To mount the VMA18 Series controller, complete the • Pliers to open and close the damper following steps: •... - Page 3 needed, use a spacer to offset tipping of the VMA For 45° and 60° boxes, hard stops must be provided controller caused by the shaft bushings. at both fully closed and fully open damper positions. Note: Using the alignment marks to center the By installing the VMA controller at the fully open captive spacer ensures sufficient VMA18 position, the VMA controller provides the open stop...
- Page 4 Figure 3: VMA18 Series Controller Wiring Terminations and Physical Features VMA1826/1832 VAV Controller Installation Instructions...
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Page 5: Vma Terminals And Bus Ports
Table 1: VMA18 Series Controller Feature Callout Numbers and Descriptions Callout Physical Features: Description and References 24 VAC, Class 2 Supply Power Spade Terminals (see Supply Power Spade Terminals) Device Address DIP Switch Block (see Setting the Device Address) Binary Outputs, 24 VAC Triacs (see Table Configurable Outputs: Voltage Analog Output (0–10 VDC) and Binary Output (24 VAC Triac) (see... - Page 6 Figure 5: SA Bus Spade Lug Wiring Input and Output Terminals The input spade terminals are located on the bottom of the VMA near the N2/FC Bus terminal block. The output spade terminals are located on the top of the controller near the power supply spade terminals.
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Page 7: Supply Power Spade Terminals
Wiring Improper wiring of this terminal may cause a short circuit across the 24 VAC power supply on -1 models. To wire the VMA18 Series controller, complete the following steps: 1. Terminate wiring per engineering drawings. 2. Wire network sensors and other devices to the VMA's Important: The supply power terminal block on the Sensor/Actuator (SA) Bus. -
Page 8: Termination Diagrams
Termination Diagrams A set of Johnson Controls® termination diagrams provides details for wiring inputs and outputs to the VMA18 Series controllers. See the figures in this section for the applicable termination diagrams. Table 2: Termination Details... - Page 9 Table 2: Termination Details Type of Field Type of Termination Diagrams Device Input/Output Temperature Sensor Dry Contact 0–10 VDC Output to Actuator (External Source) 0–10 VDC Output to Actuator (Internal Source) 24 VAC Triac Output (Switch Low, External Source) Note: Only applies to CO4 and CO5. Incremental Control to Actuator (Switch Low, External...
- Page 10 Table 2: Termination Details Type of Field Type of Termination Diagrams Device Input/Output Analog Output (Voltage) Incremental Control to Actuator (Switch Low, Internally Sourced) Note: Applies to BO1, BO2, and BO3. 24 VAC Binary Output (Switch Low, Internally Sourced) Note: Only applies to BO1, BO2, and BO3. Temperature Sensor SA Bus with Modular Jack...
- Page 11 Table 2: Termination Details Type of Field Type of Termination Diagrams Device Input/Output Network Stat with SA Bus Terminals Addressable Network Stat with SA Bus Terminals (Fixed Address = 199) VMA1826/1832 VAV Controller Installation Instructions...
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Page 12: Vma Replacement Wiring Diagram
The VMA142x controller has five binary outputs (BOs) VMA Replacement Wiring and internally supplies 24 VAC. The VMA18 controller Diagram has three binary outputs (BOs) and supplies 24 VAC to these BOs. The VMA18 controller has two configurable Consider the following information when replacing a outputs (COs) and these two COs require an external VMA1410, VMA1415, VMA1420, and the VMA1440 low voltage power source. - Page 13 Figure 9: VMA Replacement Wiring Diagram VMA1826/1832 VAV Controller Installation Instructions...
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Page 14: Sensor Replacement And Reuse Scenarios
Table 3 for a description of the most popular sensor Sensor Replacement and Reuse models used with the VMA1410, VMA1415, VMA1420, Scenarios and the VMA controllers, the sensor replacement and reuse scenarios for that sensor model, and sensor This section describes sensor replacement and reuse replacement and reuse instructions. -
Page 15: Replacing A Te-6Xxx Series Sensor
Note: In each of the following procedures that include the use of the Commissioning Converter (BTCVT), Figure 10: Single-Socket Adapter note the following: The Mobile Access Portal (MAP) Gateway serves as a replacement for the BTCVT, which is no longer available for purchase, but continues to be supported. -
Page 16: Reusing A Te-6Xxx Series Sensor
Reusing a TE-6xxx Series Sensor To reuse a TE-6xxx Series Sensor with the VMA Replacing an AP-TMZ1600-0 Sensor controller, complete the instructions in this section. The Connected to a VMA Controller Y adapter provided in the VMA18 accessory pack is To replace an AP-TMZ1600-0 sensor connected to a required for this procedure. -
Page 17: Te-700 Series Sensor Connected To A Vma Controller
Note: When using an WRZ Series Sensor with screw Replacing a TE-7710-0 Series Wireless terminal block terminations, refer to the wiring Transmitter and TE-7720-0 Wireless Receiver diagram in the installation instructions for the Connected to a VMA Controller applicable WRZ Series Sensor model. To replace a TE-7710-0 Series Wireless Transmitter and TE-7720-0 Wireless Receiver connected to a VMA TE-700 Series Sensor Connected to a VMA... - Page 18 See Guideline A in Table Internal 12 V, 15k ohm pull up Qualified Sensors: 0–2k potentiometer, RTD (1k Nickel [Johnson Controls® sensor], 1k Platinum, and A99B Silicon Temperature Sensor) Negative Temperature Coefficient (NTC) Sensor 10K Type L (10K JCI Type II is equivalent to Type L) or 2.252K Type II...
- Page 19 Table 4: I/O Terminal Blocks, Functions, Ratings, Requirements, and Cables Terminal Block Label Terminal Function, Ratings, and Requirements To Determine Wire Size Labels and Maximum Cable Length CONFIGURABLE OUTn Analog Output - Voltage Mode (0–10 VDC) See Guideline A in Table (Outputs) 10 VDC maximum output voltage...
- Page 20 Figure 13: Maximum Wire Length by Current and Wire Size Table 6: Communication Bus and Supply Power Terminal Blocks, Functions, Ratings, Requirements, and Cables Terminal Block/Port Label Terminal Labels Function, Electrical Recommended Cable Ratings/Requirements Type N2/FC Bus Communications Use existing cable or 18 AWG N2/FC BUS Signal Reference (Common) for bus communications...
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Page 21: Setup And Adjustments
Set the highest number switch that is less than or If the VMA18 Series controller may eventually be equal to the intended device address to ON. Then converted to MS/TP, use addresses 4 through 127 for a... -
Page 22: Setting The Eol Switch
BTCVT, which is no longer available for purchase, but continues to be supported. Repair Information If the VMA18 Series controller fails to operate within its specifications, replace the unit. For a replacement unit, To set the EOL switch on a field controller: contact the nearest Johnson Controls representative. - Page 23 Table 7: Troubleshooting Problem Possible Cause Correction Verification Controller is Off Power at Primary of Transformer has tripped Transformer is shorted Ensure polarity of ~24 V COM / Disconnect the Transformer, 0V at ICOM / + 15VCOM/SA BUS secondary of the 24 2.
- Page 24 Table 8: VMA18 Controller Status LEDs LED Label LED Color Normal State Descriptions of LED States POWER Green On Steady Off Steady = No power On Steady = Power is supplied by primary voltage FAULT Off Steady Blink - 2 Hz = Download or startup in progress, not ready for normal operation, SA Bus devices offline (such as Netsensors) Off Steady = No faults On Steady = Device fault or no application loaded...
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Page 25: Technical Specifications
Technical Specifications Table 10: VMA18 Series Controllers Product Code Numbers 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. - Page 26 The performance specifications are nominal and conform to acceptable industry standard. For application at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.