Trane Gas Unit Heaters Wartungshandbuch

22

 GAND-SVX01B-EN

The location of the vent terminal must be in accordance 
with the National Fuel Gas Code ANSI  Z223.1 in the U.S. or 
the National Gas Installation Code CAN/CGA-B149.1 or the 
Propane Gas Installation Code CAN/CGA-149.2 in Canada. 
Minimum clearance are as follows:

In Canada, a vent shall not terminate above a meter/
regulator assembly within 3 feet horizontally of the 
vertical center line of the regulator nor within 6 feet of any 
gas service regulator vent outlet.

Cut a hole through the wall for an 8-inch combustion air 
pipe. Install thimble if required by local codes or type of 
wall construction (see 

, Step 1).

Fasten a length of 5-inch pipe to the exhaust connection of 
the concentric adapter with sheet metal screws. Use at 
least three corrosion-resistant screws per joint. Seal all 
joints with high temperature silicone sealant. The 
concentric adapter box may be fastened directly to the wall 
or spaced away from the wall using suitable brackets 
(field-supplied). Before mounting the box, cut a length of 
8-inch pipe so that it will protrude 2 inches through the 
wall when the box is mounted in position. Fasten the 
8-inch pipe to the combustion air inlet connection of the 
concentric adapter and seal the joint. Add an additional 5-
inch pipe, if necessary, so that the base of the exhaust cap 
will be 16 to 24 inches from the combustion air inlet (see 

, Step 2).

Insert the pipes through the wall and fasten the adapter 
box in place. Flash and/or caulk 8-inch pipe on outside wall 
(see 

, Step 3).

Install the inlet air screen on the 8-inch pipe and fasten with 
sheet metal screws. Install the flue terminal on the 5-inch 
pipe and fasten in place (see 

, Step 4).

Connect the flue pipe and the combustion air pipe from the 
concentric adapter to the unit. The pipe must be single wall 
26-gauge or heavier galvanized steel or a material of 
equivalent durability and corrosion resistance. The pipe 
diameter must be listed under inlet and flue size in 

. The equivalent length of the exhaust vent pipe must 

be a minimum of 5 feet and a maximum of 50 feet. The 
equivalent length equals the total length of straight pipe 
plus 10 feet for each 90-degree elbow and 5 feet for each 
45-degree elbow. Secure each joint with a minimum of 
three corrosion resistant screws. Seal all joints of the 
exhaust vent pipe with two full turns of 3M #425 
Aluminum Foil Tape or its equivalent suitable for 550°F or 
high temperature silicone sealant. Seal all joints of the 
combustion air inlet pipe with two full turns of duct tape or 
aluminum foil tape or silicone sealant.

Select a location on the roof for the vent terminal, ensuring 
adequate space inside for the concentric vent box. The 
terminal must be at least 6 feet from any wall or adjoining 
building (see 

).

Forced air inlet within 
10 feet

3 feet above

6 feet

Door, window or gravity  

air inlet or combustion air 
inlet for other appliance

4 feet below
4 feet horizontally
1 foot above

12 inches for 
100,000 Btu/h input 
or less. 3 feet for 
input exceeding 
100,000 Btu/h.

Adjacent public walkways 7 feet above grade 7 feet above grade

Above grade level

1 foot

1 foot

Size pipes 

according to