26
4
Sidewall direct venting
SIDEWALL
TERMINATION PLATE
VENT
PIPING
GALVANIZED
THIMBLE
(WHEN REQUIRED BY LOCAL CODES)
ELBOW
ELBOW
AIR PIPING
BIRD SCREEN
BIRD SCREEN
Figure 4-5C A Typical Sidewall Termination Assembly - Models
400 - 801 PVC/CPVC/ Polypropylene or Stainless Steel
All vent pipes and air inlets must terminate
at the same height to avoid possibility of
severe personal injury, death, or substantial
property damage.
Multiple vent/air terminations
1. When terminating multiple Knight XL’s terminate
each vent/air connection as described in this manual
(FIG. 4-6A).
2. Place wall penetrations to obtain minimum clearance of
12 inches (305 mm) between vent pipe and adjacent air
inlet elbow, as shown in FIG. 4-6A for U.S. installations.
For Canadian installations, provide clearances required
by CSA B149.1 Installation Code.
3. Th
e air inlet of a Knight XL is part of a direct vent
connection. It is not classifi ed as a forced air intake with
regard to spacing from adjacent boiler vents.
VENT
12” (305 MM) MIN
15” (381 MM) MAX
12” (305 MM) MIN. BETWEEN EDGE
OF AIR PIPE AND ADJACENT VENT
PIPE
AIR
Figure 4-6B Alternate Multiple Vent Terminations
w/Field Supplied Fittings (must also comply with
Figure 4-1B)
WARNING
Prepare wall penetrations (Alternate - Field
Supplied Option)
1. Air pipe penetration:
a. Cut a hole for the air pipe. Size the air pipe hole as
close as desired to the air pipe outside diameter.
2. Vent pipe penetration:
a. Cut a hole for the vent pipe. For either combustible
or noncombustible construction, size the vent pipe
hole with at least a 1/2 inch clearance around the vent
pipe outer diameter:
• 5½ inch hole (140 mm) hole for 4 inch (102 mm)
vent pipe
• 7½ inch hole (191 mm) hole for 6 inch (152 mm)
vent pipe
b. Insert a galvanized metal thimble in the vent pipe
hole as shown in FIG. 4-5C.
3. Use a sidewall termination plate as a template for correct
location of hole centers.
4. Follow all local codes for isolation of vent pipe when passing
through fl oors or walls.
5. Seal exterior openings thoroughly with exterior caulk.
12" MIN. BETWEEN EDGE OF AIR
INLET AND ADJACENT VENT OUTLET
VENT / AIR
TERMINATION
VENT
AIR
Figure 4-6A Multiple Vent Terminations (must also
comply with Figure 4-1A)
Installation & Operation Manual
SIDEWALL
ADAPTER
(AIR)
SIDEWALL
ADAPTER
(VENT)
WALL
PLATE
GALVANIZED
THIMBLE
SIDEWALL
RETAINING
PLATE
VENT
PLATE
VENT
CAP
IMG00085
Figure 4-5B Polypropylene Sidewall Termination Assembly
