Greenheck XG-RT-500 User manual

XG-Round Retrofit VAV Terminals
XG-Round Retrofit VAV Terminals
Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.
Phone: [phone] • Fax: [phone] • Parts : 800.355.5354 • E-mail: [email protected] • Website: www.greenheck.com

XG-Round Retrofit VAV Terminals Rev 2 2
Receiving Inspection
Prior to removing the shipping materials, visually inspect the
packing materials. There should be a black plastic strip wrapped
in the clear plastic stretch wrap. If this black plastic strip is miss-
ing, the shipment may have been repacked by the shipper and
you should make a note of this on the shipping documents and
inform the delivering carrier.
After unpacking the terminals, check for shipping damage. If any
shipping damage is found, report it immediately to the delivering
carrier.
Always store the product in a clean dry location prior to installa-
tion.
Units with controls are not recommended for use in ambient
temperatures greater than 95º F. For protection of controls, do
not store in temperatures above 135ºF.
Caution: Do not use the flow sensor, connecting tubing or
damper shaft as a lift point. Damage to the components
may result.
Hanging/Installation Requirements
5Unless local building codes require hangers, the basic
XG-Round Retrofit Air Terminals may be light enough to be
supported by the ductwork itself.
5Straps or the method prescribed for round duct on the job
specification may be used. (See figure 1)
5Trapeze hangers or the method prescribed for round duct on
the job specification may be used.
(See figure 2)
Note: XG-Round Retrofit Air Terminals are not designed nor
suitable for outdoor use.
In advance of startup, verify all electrical connections are
tight and that the correct voltage is supplied to the XG-
Round Retrofit Air Terminal per the voltage listed on the
label. If factory supplied controls are present, review all wiring
diagrams for complete working knowledge.
Figure 1 Hanging Straps

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Figure 2 Trapeze
Minimum Clearance for Access
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 ap-
propriate 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-Round
Retrofit 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-Round Retrofit 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-Round Retrofit 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-Round Retrofit 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
diameters of straight duct at the XG-Round Retrofit Air
Terminal inlet.
5. The outlet end of the XG-Round Retrofit Air Terminal is
designed for use with the same duct connections as
the inlet.

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Field Electrical Wiring
5All field wiring must comply with local building codes and
NEC. (ANSI/NFPA 70-2002)
5When Applicable, electrical control and piping diagrams are
attached to exterior of XG-Round Retrofit Air Terminal.
5Use copper only conductors.
5XG-Round Retrofit Air Terminal must be properly grounded
per NEC 424-14 and 250.
5Always check product label for voltage and current data to
determine the proper wire size and over current protection.
5The control cabinet contains live electrical parts.
5Contacting these parts with power applied may cause seri-
ous injury or even death.
5The control panel cover must be closed or in place before
applying electric power to the XG-Round Retrofit Air Termi-
nal.
5These recommendations are not meant to precluded NEC
requirements or applicable local building codes and are the
sole responsibility of the installing contractor.
Important
If equipped with pneumatic controls, the orientation of the XG-
Round Retrofit Air Terminal unit is critical. The pneumatic controls
must be mounted right side up. The XG-Round Retrofit Air Terminal
must be level within + or – 10 degrees of horizontal, both parallel
to the air flow and at right angle of air flow. The control side of the
XG-Round Retrofit 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.
Controls
For information on controls provided by other manufactures and
installed on the XG-Round Retrofit Air Terminals, contact the local
branch or dealer. Installing the Air Terminal in a different location
than noted on the XG-Round Retrofit Air Terminal label and build-
ing plans, may result in excessive start up labor and is the sole
responsibility of the contractor.
Important
XG-Round Retrofit Air Terminals with digital controls, if factory pro-
grammed, incorporate specific communication addresses.
Inlet Flow Sensor
XG-Round Retrofit Air Terminals are shipped with factory
installed (where applicable) pressure differential inlet flow sensors
in the primary inlet. See figure 3 for calibration curve and K
factors.
Labeling
XG-Round Retrofit Air Terminals are shipped from the factory with
multiple information labels.
Control Sequence Label: Affixed to the exterior of the
XG-Round Retrofit Air Terminal casing. Displays piping/wir-
ing diagram, control sequence number and any optional
components.
Terminal I.D. Label: Affixed to the exterior of XG-Round
Retrofit Air Terminal. Shows tagging, representative name,
sales order number, applicable certifications, model number,
Made in USA, any applicable electrical data and UL compli-
ance markings.
AHRI Certification Label: Identifies applicable industry
test standard and certifies Air Terminal is in compliance.
Orientation Label: Identifies the proper air flow direction
and top of Round Retrofit Air Terminal.
Troubleshooting
Investigating Noise Complaints
5Noise from a Round Retrofit Air Terminal can be due to a
variety of conditions and can be difficult to eliminate.
5The first step is to isolate the type, source and direction.
5Generally noise heard at the air outlet is considered a dis-
charge type.
5Noise heard through the ceiling is considered radiated noise.
5For detailed information concerning noise transmission in
buildings, refer to AHRI Standard 885-2008,
“Procedure for estimating occupied space sound levels in
the application of Air Terminals and air outlets”.
Discharge Noise
5This is usually caused by high static or little to no internal duct
lining downstream of the Round Retrofit Air Terminal.
5It can sometimes be caused by air outlet itself.
5Air outlet generated sounds can be reduced by reducing flow
or increasing an outlet size.
5Reducing static pressure, flow or adding additional down-
stream attenuation materials will reduce discharge sounds
from the Air Terminal.
Radiated Noise
5Radiated noise is most commonly associated with Fan Pow-
ered Terminals.

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Figure 3