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

20

Before beginning installation of piping system thoroughly read

the section of this manual VENT PIPE PREPARATION.

If  you  are  installing  your  system  so  that  it  vents  through  roof,

please  refer  to  section    titled  INSTALLATION  OF  VERTICAL

VENT SYSTEM.

1.  Install the vent terminal by using the cover plate as a template

to mark the hole for the vent pipe to pass through the wall.

BEWARE  OF  CONCEALED  WIRING AND  PIPING  INSIDE 

THE WALL.

2.  If  the  Vent  Terminal  is  being  installed  on  the  outside  of  a

finished wall, it may be easier to mark both the inside and

outside wall. Align the holes by drilling a hole through the

center of the template from the inside through to the outside.

The template can now be positioned on the outside wall using

the drilled hole as a centering point for the template.

3.  A) MASONRY SIDE WALLS

 Chisel an opening approximately one half inch (1.3 cm) larger

than the marked circle.

 

 B) WOODEN SIDE WALLS

 Drill a pilot hole approximately one quarter inch (0.64 cm) outside

of the marked circle. This pilot hole is used as a starting point

for  a  saws-all  or  sabre  saw  blade.  Cut  around  the  marked

circle staying approximately one quarter inch (0.64 cm) outside

of  the  line.  (This  will  allow  the  vent  to  easily  slide  through

the  opening.  The  resulting  gap  will  be  covered  up  by  the

Vent Terminal cover plate.) Repeat this step on inside wall if

necessary.

Cut a length of PVC pipe about 3.5 inches (8.9 cm) longer than the

wall  thickness  at  the  opening.    Glue  the  vent  terminal  to  this

section of pipe. Slide the wall plate over the pipe to stop against

the vent terminal. Place a bead of caulking (not supplied) around

the  gap  between  the  pipe  and  cover  plate.   Apply  enough  to

fill some of the gap between the pipe and wall. Place some of

the caulking on the back of the plate to hold it against the wall

after installation. If the vent pipe is installed up to the wall, with

a coupling on the end against the wall opening, the pipe with

the  vent  terminal  can  be  prepared  for  gluing  before  inserting

through  the  wall.    Slide  the  pipe  through  the  wall  and  insert

into the coupling on the other side of the wall, making sure that

the vent terminal ends up pointed in the correct position, see

Figure 18A.

The air intake provided on the unit contains a mesh screen to prevent

large particles from entering the unit.

WHEN THE UNIT IS TO BE SETUP AS A DIRECT VENT, THE 

MESH SCREEN MUST BE REMOVED. THE INLET VENT PIPE 

MAY THEN BE GLUED TO THE AIR INTAKE (See Figure 18B)

PROVIDED ON THE UNIT. THE SCREEN REMOVED FROM THE 

INTAKE NEEDS TO BE INSERTED INTO THE 2” - 22.5 DEGREE

VENT TERMINAL SUPPLIED IN THE VENT TERMINAL KIT.

THIS UNIT CONSISTS OF TWO VENT TERMINALS - AN INTAKE 

VENT TERMINAL AND AN EXHAUST VENT TERMINAL. THE INTAKE 

VENT TERMINAL IS A 2” 22.5° PVC ELBOW(-) WITH A MESH WIRE

SCREEN AND THE EXHAUST VENT TERMINAL IS A 2” 22.5° PVC

ELBOW WITH A MESH WIRE SCREEN.
NOTE:  TO  PREVENT  EXHAUSTING  PRODUCTS  FROM 

CIRCULATING  TO  THE AIR  INTAKE  IN  WINDY/COLD AREAS,

THE MAXIMUM PRACTICAL DISTANCE BETWEEN THESE TWO 

TERMINALS IS RECOMMENDED.

WHEN  LOCATING  THE  TERMINALS  ON A  SIDEWALL,  THE 

FOLLOWING  SPECIFICATIONS  PERTAINING  TO  TERMINAL 

LOCATION MUST BE FOLLOWED.
1. The intake air terminal and the exhaust vent terminal must terminate

on the same exterior wall and must be separated by a minimum of

24” (61cm) on vertical centerline (see Figure 18C). In colder climates

increasing  the  24”  (61cm)  minimum  will  reduce  possibility  of  frost

over from side winds blowing exhaust vapors to the air intake of the

direct vent.
2. The horizontal centerline of the intake air terminal may not be located

lower than the horizontal centerline of the exhaust vent terminal (see

Figure 18C).