VMA1826/1832 VAV Controller Installation Instructions
MS-VMA1826-x, MS-VMA1832-x
Part No. 24-10143-373, Rev. J
Issued September 2018
Refer to the
QuickLIT website
for the most up-to-date version of this document.
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
.
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
1
VMA1826/1832 VAV Controller Installation Instructions
