WattMaster MG331-21-VAVCAV - Manual (Page 28)

Form: WM-OE511-RndDmpr-Sub-01A
Page 1 of 2
VAV System
Description
The OE511-XX-VAV Pressure Independ-
ent Round Damper consists of a round air
valve, MG320-VAV zone controller, OE282
damper actuator, airflow sensor and a
crossflow air pickup probe. An optional
auxiliary relay board (OE321) is available
for control of auxiliary heat and/or control
of series or parallel flow fan terminal units.
The MG320-VAV Zone Controller is micro-
processor based and communicates with
the HVAC Unit Controller on the WMVAV
communications loop. The VAV Controller
monitors the space temperature and allo-
cates the proper airflow into its assigned
space to achieve the desired comfort and
ventilation levels.
The Pressure Independent Round Damper
is used in systems that require pressure
independent airflow control. If your system
does not require pressure independent
control, please see the “OE510 Pressure
Dependent Round Damper” data sheet for
the correct specifications.
All Round Dampers are tested and certified in accordance with ARI standard 880. An ARI label is affixed to all
units.
Mounting
The Round Damper assembly should be mounted according to standard duct installation practices with airflow
direction as shown in the illustration above. After installation of the Round Damper in the ductwork, insulation
should be applied around any remaining uninsulated surface on the air valve inlet and outlet. The Round Damper
should be mounted so the control enclosure is positioned to the left or right side of the ductwork with the control
enclosure in a vertical plane. Do not mount the Round Damper with the control enclosure on the top or bottom of
the ductwork. Adequate clearance should be maintained between the control panel and any obstruction to allow
for removal of the control panel cover and access to the controls.
OE511-XX-VAV–Pressure
Independent Round Damper
Technical Data OE511-XX-VAV Pressure Independent
Round Damper
VAV Controller: Air Damper Construction:
Supply Power 24 Volt AC Damper Body 24 Ga. Galv. Steel
Power Consumption 12 VA Maximum Damper Blade Round -18 Ga. Galv. Steel
Operating Temperature 35
°F to 125°F Damper Bearings Oil Impregnated Bronze
Operating Humidity 90% RH Non-Condensing Damper Seal Volara
® Type A Gasket
Communications RS-485 - 9600 Baud Leakage Less Than 1% @ 3” SP
Insulation ½” Foil Faced Fiberglass
Inputs: Dimensions:
Zone Temperature Sensor Air Damper Model “A” “B” “C”
Setpoint Adjustment OE521-06 (6”) 19.00 5.88 9.38
Actuator Position Feedback OE521-08 (8”) 19.00 7.88 11.38
Air Flow Sensor OE521-10 (10”) 19.00 9.88 13.38
Outputs: OE521-12 (12”) 22.00 11.88 15.38
Expansion Port for Auxiliary Relay Board OE521-14 (14”) 22.00 13.88 17.38
OE521-16 (16”) 22.00 15.88 19.38
WattMaster reserves the right to change specifications without notice
Three Year Warranty On Electronic Components One Year Warranty On Air Damper
1/2" Foil Faced
Insulation
Actuator
Zone Controller
Round Damper
Blade Assembly
Control Enclosure
(Cover Removed)
AIR FLO W AIR FLO W