A.O. Smith 197835-001 Manuel D’Utilisation

22

With the route of the venting system and selection of materials completed,

as discussed in the section of this manual titled PLANNING THE VENT

SYSTEM, the through the wall vent terminal in place and the first section

of piping, up to first elbow, installed at the blower it is time to complete the

installation of the venting system for the sidewall installation.

Before completing the installation of the venting system be sure to read

the sections of this manual discussing the proper method of cutting and

cementing PVC pipe and fittings: VENT PIPE PREPARATION.

It is recommended that the completion of the venting system start at

the blower assembly and run to the coupling on the inside wall of the

vent terminal, Figure 18A.

The  vent  system  piping  should  be  supported  every  5  feet  (1.5  m) 

of vertical run and every 3 feet (91 cm) of horizontal run. All piping 

and fittings must be joined by the proper procedures as described 

under: VENT PIPE PREPARATION.

A proper flashing or “BOOT” should be used to seal the pipe where it

exits the roof. The total vent system should not exceed the equivalent

feet of pipe as listed in Table 1.

Provide  support  for  all  pipe  protruding  through  the  roof. All  piping

should  be  properly  secured.  The  vent  system  piping  should  be

supported every 5 feet (1.5 m) of vertical run and every 3 feet (91 cm)

of horizontal run. All piping and fittings must be joined by the proper

procedures as described under: VENT PIPE PREPARATION.

The vent system must terminate so that proper clearances are

maintained as cited in local codes or the current edition of the

National  Fuel  Gas  Code  (ANSI  Z223.1)  or  the  Natural  Gas  and

Propane Installation Code (CAN/CSA-B149.1) and as listed below:

1.  Vent Termination must extend a minimum of 18 inches (46 cm) above

roof or 18 inches (46 cm) above the anticipated snow level to prevent

blockage of the vent termination, as shown in Figures 20 and 21.

This appliance is certified for concentric venting with concentric vent

kit #9003910105. Follow instructions below for proper installations.

Each kit is comprised of the following:

  Rain Cap 

3 in. 

1

  SDR-26 pipe 

4 in. dia. 

1

  SDR-26 pipe 

2½ in. dia. 

1

  Y Concentric Fitting 

3 in. 

1

  Installation Instructions 

194504 

1

Field  supplied  pipe  and  fittings  are  required  to  complete  the

installation.