Trane Gas Unit Heaters Wartungshandbuch

GMND-SVX01B-EN

19 

1.

The combustion air system installation must be in 
accordance with the latest edition of (N.F.P.A. 54) ANSI 
Z223.1 National Fuel Gas Code. In Canada, installation 
must be in accordance with CGA-B149.1 “Installation 
Code for Natural Gas Burning Appliances or 
Equipment” and CGA-B149.2 “Installation Code for 
Propane Burning Appliances and Equipment”.

2. A Breidert Type L or Fields inlet cap, furnished by the 

customer, must be installed at the termination point of 
the combustion air system (see 

 and 

3. Use single wall pipe constructed of 26 gauge 

galvanized steel or a material of equivalent durability 
and corrosion resistance for the combustion air 
system. For installation in Canada, use pipe 
constructed from 0.025-inch thick aluminum or 0.018-
inch thick stainless steel.

4. Long runs of single wall combustion air piping passing 

through an unheated space may require insulating if 
condensation becomes noticeable.

5. The combustion air system must be installed to 

prevent collection of condensate. Pitch horizontal 
pipes downward 1/4 inch per foot (21 mm/m) toward 
the inlet cap to facilitate drainage. Vertical combustion 
air pipes should be arranged as depicted in 

6. The equivalent length of the combustion air system 

must not be less than five feet (1.5 m) and must not 
exceed 50 feet (15.2 m). Equivalent length equals the 
total length of straight pipe, plus 15 feet (4.6 m) for 
each 90-degree elbow and five feet (1.5 m) for each 
45-degree elbow.

7.

Each slip joint must be secured with at least three 
corrosion resistant screws. Two full turns of 3M™ #425 
Aluminum Foil Tape or its equivalent must then be 
used to seal each joint. General Electric RTV-108, Dow 

Corning

®

 RTV-732 or an equivalent may be used 

instead of the tape.

8. For horizontal combustion air systems longer than five 

feet (1.5 m), the system must be supported from 
overhead building structures at three-foot (1-m) 
intervals.

1.

Vent system installation must be in accordance with 
the latest edition of (N.F.P.A. 54) ANSI Z223.1 National 
Fuel Gas Code. In Canada installation must be in 
accordance with CGA-B149.1 “Installation Code for 
Natural Gas Burning Appliances and Equipment” or 
CGA-B149.2 “Installation Code for Propane Burning 
Appliances and Equipment”.

2. A Breidert Type L or Fields vent cap, furnished by the 

customer, must be installed at the termination point of 
the vent system (see 

 and 

3. Use single wall pipe constructed of 26 gauge 

galvanized steel or a material of equivalent durability 
and corrosion resistance for the vent system. For 
installations in Canada, use corrosion resistant and 
gas-tight, listed vent pipe conforming with local 
building codes, or in the absence of local building 
codes, with current CAN/CGA-B149.1, “Installation 
Codes for Natural Gas Burning Appliances and 
Equipment” or CAN/CGA-B149.2, “Installation Codes 
for Propane Gas Burning Appliances and Equipment”.