VAV electronic diffuser

VAV Electronic Diffuser
Typical system application with electronic bypass (EB) damper and
optional SPC-800 static pressure control
HOW IT WORKS:
The automatic changeover duct sensor located on the diffuser senses whether there
is warm air or cool air in the branch supply duct. If the thermostat calls for cooling and the duct
sensor determines there is cool air in the duct, the diffuser will open; otherwise it will
remain closed. If the thermostat is calling for heat and the duct sensor determines there is warm
air in the duct, the diffuser will open; otherwise it will remain closed.
As individual zone dampers open and close, the system static pressure will rise and fall.
In order to maintain proper airflow and static pressure through the HVAC system, a bypass
system incorporating a floating type motorized damper and a static pressure control should be
used. The static pressure control is equipped with solid-state switching and timing circuit to
enhance operation and improve reliability.
FEATURES:
• VAV diffuser neck sizes 6, 8,10, 12, 14
• LED status indication
• Auto changeover
• Controls are pre-wired from factory
• Minimum position adjustment
• No control panel required
SYSTEMS
5418 Elmwood Avenue Indianapolis, IN 46203 • 888.652.9663 • FAX 317.227.1034
www.jacksonsystems.com
VAV Electronic Diffuser
Available in 6” to 14” neck sizes for nominal 24“x24” face sizes
Available in 6” and 8” neck sizes for nominal 12”x12” face sizes
OPERATION:
Diffusers incorporate an internal modulating disk that continually regulates the volume of
supply air in response to a wall-mounted thermostat. The VAV diffuser is designed to maintain
coanda effect (draft free) of discharge air along the ceiling, providing a sustained velocity throughout the volume range. Operating the diffuser from an individual wall-mounted thermostat enables
users to choose their own desired comfort control from desk top level, rather than a
stratified ceiling level.
FEATURES:
Wall-mounted thermostatic control
Temperature is controlled within an individual zone from a wall mounted thermostat.
Powerful, low voltage actuator
Floating-point actuators are standard.
True variable air volume in heating and cooling modes
The diffuser effectively regulates the amount of supply air into the space and uses a
wall mounted thermostat to achieve true VAV control in heating mode, as well as
cooling mode. Automatic change over from heating to cooling is standard.
If a single zone system or multiple zone systems are used to zone more than 30% of the
total CFM served by the HVAC system, a bypass damper may be required to maintain
constant system static pressure.
Maximum air volume range is from 118 to 710 CFM
Adjust minimum and maximum air flows.
1-40 VA transformer will power a single Smart zone system=1 Master 1 Thermostat
and up to 19 slave/drone actuator/diffusers.
1-75 VA transformer will power a single Smart zone system=1 Master 1 Thermostat
and up to 36 slave/done actuator/diffusers.
18-8 GA wire shall be supplied by others approx. $95.00 a roll which= 250ft of wire
SYSTEMS
5418 Elmwood Avenue Indianapolis, IN 46203 • 888.652.9663 • FAX 317.227.1034
www.jacksonsystems.com
Specification Sheet
VAV Electronic Diffuser
24”
24”
“A”
6.625”
2.5”
2.75”
SIDE VIEW
TOP VIEW
SUGGESTED SPECIFICATION:
The electronically controlled variable air volume diffuser shall be the Jackson Systems VAV Electronic Diffuser. The
removable face plate (minimum of 18 gauge steel) attached to a unitary stamped seamless backbone. The diffusers shall
include an integral modulating disk that continually regulates the volume of supply air in response to the wall-mounted
thermostat. Diffusers dependent on integral air induction ceiling-located sensors or set point adjustment methods other
than from wall-mounted thermostats shall not be acceptable.
To ensure finite control of temperature by modulation, the electric 24Vac actuators shall be a drive-open, drive-closed
motor on the electrically driven units. Actuators that incorporate an expanding material which only drives the unit open
when subjected to heat-causing electrical current, requiring a spring return mechanism to force the diffuser to a closed
position shall not be acceptable. Electronic modulating wall-mounted thermostatic control shall be either a 2 to 10Vdc
or floating-point. All field wiring, materials and labor shall be supplied and installed by others.
DIMENSIONS:
SE-HC are available in 12” x 12” and 24” x 24” face sizes with “A” neck sizes in 6”, 8”, 10”, 12” and 14” diameters.
APPLICATION:
Used to vary the supply air volume from a wall-mounted thermostat. Diffuser is designed to maintain
coanda effect (draft free) of discharge air along the ceiling, providing a sustained discharge velocity throughout
the volume range of 118 to 710 CFM.
OPERATION:
Incorporates an integral modulating disk that continually regulates the volume of supply air in response to the
wall-mounted thermostat.
CONSTRUCTION:
Unitary stamped seamless backbone with removable face plate
Steel construction with baked white enamel finish
4-way discharge pattern
ELECTRICAL:
24Volt, 2VA, floatingpoint
90 second timing
44lb.-in.
SYSTEMS
5418 Elmwood Avenue Indianapolis, IN 46203 • 888.652.9663 • FAX 317.227.1034
www.jacksonsystems.com