Tjernlund PAI-3,4,5,6,7 Commercial Combustion Air In-Forcer 8504036 Rev A 05/01 - Manual (Page 6)

INTAKE HOOD LOCATIONS - WALL MOUNT OR ROOF MOUNT
The IN-FORCER has been Listed in accor-
dance with the 1990 BOCA National
Mechanical Code, Section M-306.1 and
M-306.1.1 as follows.
M-306.1 LOCATION:
Outside air exhaust and intake openings shall
be located a minimum of 10 feet (3048mm)
from lot lines or buildings on the same lot.
When openings front on a street or public way,
the distance shall be measured to the center-
line of the street or public way.
M-306.1.1 INTAKE OPENINGS:
Outside air intake openings shall be located a
minimum of 10 feet (3048mm) from any hazard
or noxious contaminant such as vents, chim-
neys, plumbing vents, streets, alleys, parking
lots and loading docks. When a source conta-
minant is located within 10 feet (3048mm) of an
intake opening, such opening shall be located a
minimum of 2 feet (610mm) below the contami-
nant source.
IN ADDITION TO THESE CODES THE
MANUFACTURER RECOMMENDS THAT:
The Intake Hood should be a minimum of 1 foot above grade or anticipated snow line.
INSTALLATION (TOOLS REQUIRED)
•Reciprocating saw •1/4”, 5/16”, 3/8” nut runner or socket •Wire cutter/stripper
•Drill and 1/4” bit •Blade screwdriver •Masonry chisel
INSTALLATION OF INTAKE HOOD
Note: Before cutting opening through wall or roof, figure layout of pipe runs. Consult selection table on page 3 and Intake Hood loca-
tion above.
The Intake Hood is designed so relatively large amounts of outdoor air can be pulled in through a small wall or roof opening. If prop-
erly installed, rain and snow will not be pulled in with the outdoor air. Systems installed without the PAI-Series Intake Hood may be
susceptible to the entry of rain or snow and CFM values can not be guaranteed.
The Intake Hood may be primed and painted to blend in with the building exterior.
The Intake Hood can be mounted on an outside wall or roof.
ROOF MOUNT INSTALLATION OF INTAKE HOOD
1. Attach take-off collar to the Intake Hood Base by bending over the tabs of the collar. Screw galvanized pipe to take-off collar on
Intake Hood Hood base.
2. Verify that roof penetration will not come in contact with concealed wiring or plumbing. Cut a circular hole through the roof.
(PAI-3 Rough-In: 6 1/2”, PAI-4 Rough-In: 8 1/2” , PAI-5/6 Rough-In: 10 1/2”, PAI-7 Rough-In: 12 1/2”)
3. Install 4 pieces of plumber’s strap from the Intake Hood Base to the pipe. Use the provided 1/4” bolts, washers, and nuts to attach
the straps to the hood. Use 2 sheet metal screws per strap to attach the straps to the pipe, (See Diagram A).
4. Secure Intake Hood cover to base with #8 x 3/8” sheet metal screws, PAI-3/4 (4), PAI-5/6 (8), PAI-7 (20), (See Diagram A).
5. Install roof flashing and storm collar. Clamp storm collar around galvanized pipe penetrating through to the interior. Intake Hood
should be at least 2 feet above the roof.
6. Install Intake Hood backing plate on ceiling if desired with #10 x 1 1/4” screws provided, PAI-3/4 (4), PAI-5/6/7 (8).
5
On wall installations, if possible, terminate the IN-FORCER on a wall that does not face the direc-
tion of prevailing winds. This will diminish the possibility of wind infiltration.