Duct Connections; Gas Piping - Trane GXAA Installation, Operation And Maintenance Manual

Door, window, or gravity vent inlet;
N N o o t t e e : : *If the vent terminal is to be installed near ground level, the vent terminal must be

Duct Connections

All ductwork must be properly supported so that no strain is put on the unit. Do not alter or bend
the discharge duct flanges supplied on your make-up air unit.
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Gas Piping††
All gas piping must be installed in accordance with local codes. It is required that a ground union
be installed adjacent to the gas valve of each duct furnace, and a ground union be installed just
external of each duct furnace for unit servicing. On vertical runs, a drip leg should be provided
upstream of any control manifold. A gas shutoff valve should be, or may be required by local
codes, installed upstream of the external ground union for each duct furnace. A 1/8" N.P.T.
plugged tapping, accessible for test gauge connection, must be installed immediately upstream
of the unit gas supply connection.
MUA-SVX006B-EN
Vent Systems Termination Clearance Requirements
Structure/Object
combustion air inlet for other
appliances
Forced air inlet within 10 feet
Adjoining Building or parapet
Adjacent public walkways
Electric, gas meters & regulators
Above grade level*
positioned at least six inches (152mm) above the maximum anticipated snow depth.
Duct connections must have a removable access panel in the duct which is connected to a
duct furnace. The duct openings shall be accessible when the unit is installed in service, and
shall be of such size that smoke or reflected light may be observed inside the casing to
indicate the presence of leaks in the heating element. The covers for the panels shall be
attached in such a manner as to prevent leaks. Ducts (or optional outside air hoods) exposed
to the outdoors must be insulated and sealed to prevent water from entering either the unit or
building through the duct.
If a single, double or triple duct furnace only unit is connected to a return air duct, or any
other inlet air restriction, the appliance shall be installed on the positive pressure side of the
air circulating blower.
When connecting return air duct to Standard or High CFM cabinets, attach duct to return air
opening flange when no dampers are used. Otherwise, if dampers are used, attach return air
duct around collar at bottom of damper assembly. Also refer to the Dimensional Data section
of this manual, Submittal Data Sheets and Indoor Duct Furnace Manual specified for your
unit.
Minimum Clearance for Termination Locations
USA
9 inch for 10,000 to 50,000 BTU/Hr
input; 12 inch for input exceeding
50,000 BTU/Hr.
3 feet above
6 feet
7 feet above grade
4 feet horizontal
1 foot*
I I n n s s t t a a l l l l a a t t i i o o n n
CANADA
9 inch (230mm) for 10,000 to
50,000 BTU/Hr input; 12 inch
(305mm) for input exceeding
50,000 BTU/Hr.
6 feet (1.8m)
6 feet (1.8m)
7 feet (2.1m) above grade
3 feet (0.9m) horizontally from
meter/regulator assembly. 6 feet
(1.8m), any direction, from a gas
service regulator vent outlet
1 foot (0.3m)*
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