Lochinvar Sunc 1.0, Installation & Operation Manual

Page: 23 / 68

23
Installation & Operation Manual
3
Sidewall direct venting
(continued)
Vent/air termination – sidewall
5. Maintain clearances as shown in FIG.’s 3-1A thru 3-4B,
pages 22 and 24. Also maintain the following:
a. Vent
must terminate:
• At least 6 feet (1.8 m) from adjacent walls.
• No closer than 12 inches (305 mm) below roof
overhang.
• At least 7 feet (2.1 m) above any public walkway.
• At least 3 feet (.9 m) above any forced air intake
within 10 feet (3 m).
• No closer than 12 inches (305 mm) below or
horizontally from any door or window or any
other gravity air inlet.
b. Air inlet must terminate at least 12 inches (305 m)
above grade or snow line; at least 12 inches
(305 mm) below the vent termination; and the vent
pipe must not extend more than 24 inches (610 mm)
vertically outside the building as shown in FIG.’s
3-1B and 3-1C.
c. Do not terminate closer than 4 feet (1.2 m)
horizontally from any electric meter, gas meter,
regulator, relief valve, or other equipment. Never
terminate above or below any of these within 4 feet
(1.2 m) horizontally.
6. Locate terminations so they are not likely to be damaged
by foreign objects, such as stones or balls, or subject to
buildup of leaves or sediment.
VENT / AIR
TERMINATION
12"
MIN.
12"
MIN.
12"
MIN.
Figure 3-2A Clearance to Gravity Air Inlets
FORCED AIR
INLET
VENT / AIR
TERMINATION
7' MIN. ABOVE ANY
PUBLIC WALKWAY
IF LESS
THAN 10’
36"
MIN.
Figure 3-3A Clearance to Forced Air Inlets
TO BOILER INTAKE
AIR CONNECTION
FROM BOILER VENT
PIPE CONNECTION
12" (305 MM) MIN
15" (381 MM) MAX
12" (305 MM) MIN
Figure 3-1C Alternate Stainless Steel Sidewall
Termination w/Field Supplied Fittings
PVC/CPVC or ABS is acceptable air inlet pipe material.
NOTICE
12” (305 MM)
MIN
BIRD
SCREEN
(TYPICAL)
12” (305 MM)
MIN
12” (305 MM)
MIN
Figure 3-2B Alternate Clearance to Gravity Air Inlets
w/Field Supplied Fittings
Model Kit Number Vent Size
1.0 - 1.5
KIT30028
(Stainless Steel)
6 inch vent
1.3 - 1.5
KIT30029
(Stainless Steel)
7 inch vent
Table 3B Stainless Steel Sidewall Vent Kits