Lochinvar Shield SNR200-100 Installation And Service Manual page 20

3
Sidewall direct venting
Prepare wall penetrations
1. Use the factory supplied wall plate as a template to locate
the vent and air intake holes and mounting holes.
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.
Vent pipe penetration:
a. Cut a hole for the vent pipe.
combustible or noncombustible construction, size
the vent pipe hole with at least a 1/2 inch clearance
around the vent pipe outer diameter:
• 4½ inch hole for 3 inch vent pipe
• 5½ inch hole for 4 inch vent pipe
Drill 3/16" diameter holes for inserting the plastic
anchors into the wall.
2. Install the vent and air intake piping through the wall
into the vent plate openings. Seal all gaps between the
pipes and wall. Use RTV silicone sealant to seal the air
pipe. Use the glue (cement/primer) listed in Table 2A on
page 15 to seal the vent pipe.
3. Mount and secure the vent plate to the wall using
stainless steel screws. Seal around the plate to the wall
assuring no air gaps.
4. Assemble the vent cap to the vent plate (see FIG. 3-4A).
Insert the stainless steel screws into the vent cap screw
hole openings and securely attach the vent cap to the vent
plate.
5. Seal all wall cavities.
Figure 3-4A Sidewall Termination Assembly
AIR PIPING
VENT PIPING
WALL PLATE
GALVANIZED
THIMBLE
20
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:
• 4½ inch hole for 3 inch vent pipe
• 5½ inch hole for 4 inch vent pipe
b. Insert a galvanized metal thimble in the vent pipe
hole as shown in FIG. 3-4B.
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 floors or walls.
5. Seal exterior openings thoroughly with exterior caulk.
Figure 3-4B Alternate Sidewall Termination Assembly
w/Field Supplied Fittings
VENT PLATE
VENT CAP
Termination and fittings
1. The air termination coupling must be oriented at least
12 inches above grade or snow line as shown in FIG. 3-1A,
page 18.
2. Maintain the required dimensions of the finished
termination piping as shown in FIG. 3-1A, page 18.
3. If using the alternate sidewall termination do not extend
exposed vent pipe outside of the building more than what is
shown in this document. Condensate could freeze and
block vent pipe.
Installation & Service Manual
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