VMA1826/1832 VAV Controller Installation Guide
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
®
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 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
.
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
*2410143373K*
Part No. 24-10143-373 Rev. K
2019-10-18
(barcode for factory use only)
MS-VMA1826-x, MS-VMA1832-x
