XG-Dual Duct VAV Terminals Rev 2
4
Important
If equipped with pneumatic controls, the orientation of the
XG-Dual Duct Air Terminal unit is critical. The pneumatic controls
must be mounted right side up. The XG-Dual Duct Air Terminal
must be level or – 10 degrees of horizontal, both parallel
to the air flow and at right angle of air flow. The control side of
the XG-Dual Duct Air Terminal is labeled with an arrow indicat-
ing up. Unless otherwise noted, most electric, analog electronic
and digital are not position sensitive and may be installed in any
orientation.
Minimum Clearance for Access
XG-Dual Duct Air Terminals require sufficient space to allow
servicing of the controls. Horizontal clearance requirements are
dependent upon access panel dimensions which are indicated on
the appropriate submittal. For control panel access, a minimum
of 18” is recommended. See the appropriate submittal for control
panel location.
Note
:
These clearances recommendations are not meant
to preclude NEC requirements or local building codes that
may be applicable, which are the responsibility of the installing
contractor.
Connecting Duct Work
1. Slip each inlet duct over the inlet collar of the XG-Dual
Duct Air Terminal.
2. Fasten and seal the connection by method prescribed
by job specification.
3. The diameter of the inlet duct in inches, must be equal
to the listed size of the XG-Dual Duct Air Terminal; e.g.
a duct that actually measures 8 inches must be fitted to
a size 8 inch Air Terminal. The inlet tube of the XG-Dual
Duct Air Terminal is manufactured 1/8” smaller than the
listed size in order to fit inside the duct.
Note
:
Do not insert duct work inside the inlet collar of the
XG-Dual Duct Air Terminal. Inlet duct should be installed in
accordance with SMACNA guidelines.
4. If an inlet air flow sensor is installed, it is recom-
mended the installer provide a minimum of 3 duct diam-
eters of straight duct at the XG-Dual Duct Air Terminal
inlet.
5. The outlet end of the XG-Dual Duct Air Terminal is de-
signed for use with flanged outlet connections.
(Slip and
drive outlet connection is optional.)
6. A rectangular duct the size of the XG-Dual Duct Air
Terminal outlet should be attached.
(Refer to submittal
for correct size.)
Field Electrical Wiring
5
All field wiring must comply with local building codes and
NEC. (ANSI/NFPA 70-2002)
5
When Applicable, electrical control and piping diagrams are
attached to bottom of XG-Dual Duct Air Terminal.
5
Use copper only conductors.
5
Air Terminal must be properly grounded per NEC 424-14
and 250.
5
Always check product label for voltage and current data to
determine the proper wire size and over current protection.
5
The control cabinet contains live electrical parts.
5
Contacting these parts with power applied may cause seri-
ous injury or even death.
5
The control panel cover must be closed or in place before
applying electric power to the XG-Dual Duct Air Terminal.
5
These recommendations are not meant to precluded NEC
requirements or applicable local building codes and are the
sole responsibility of the installing contractor.
Controls
For information on controls provided by other manufactures and
installed on the Air Terminals, contact the local branch or dealer.
Important
Air Terminals with digital controls, if factory programmed, incor-
porate specific communication addresses. Installing the Air Ter-
minal in a different location than noted on the Air Terminal label
and building plans, may result in excessive start up labor and is
the sole responsibility of the contractor.
Inlet Flow Sensor
XG-Dual Duct Air Terminals are shipped with factory installed
(where applicable) pressure differential inlet flow sensors in the
primary inlet.
See figure 4
for calibration curve and K factors.
