Tjernlund PAI-2T Fresh Air In-Forcer (Discontinued) 8504039 Rev A 06/00 User Manual
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Plan vent runs with desired CFM requirements in mind. It is recommended that the IN-FORCER be mounted as close to the dis-
charge location as possible to minimize the use of the more restrictive flex duct. For CFM capabilities see Table 2 or Table 3.
If using flex duct on discharge side, a take-off section of 6” diameter metal pipe or a 6” diameter metal elbow will have to be installed
on the IN-FORCER . The flex duct will then have to be connected to the take-off section by duct tape or other suitable method,
(See Diagram I).
If flex duct will be directed to higher levels, instead of down, it is recommended that a 6” metal elbow be connected to the
IN-FORCER at discharge. Flex duct can then be connected to the elbow. All flex duct runs should be tapered gradually to prevent
severe bends and kinks that may add resistance and reduce CFM. Make bends with as large a radius as possible and keep flex duct
as straight as possible for extended runs, (See Diagram J).
The discharge should terminated three feet from a barometric draft control or intake grille of an appliance. If this is not possible termi-
nate on sides or opposite side of intake on appliance. Never terminate within 3 feet from the front or intake side of appliance. Supply
duct should also terminate a minimum of 18 inches above floor or other obstructions if perpendicular to them, (See Diagram K).
INSTALLING INTAKE ELBOW
1. Insert PVC pipe through wall and cut to desired exterior termination length. NOTE: A minimum of two feet should be used for PVC
section that is connected to IN-FORCER PVC coupler. This will leave room for servicing IN-FORCER.
2. Apply PVC cement to exterior pipe joints and make connections as shown depending on exterior layout, (See Diagram L).
3. After PVC pipe, intake elbow and IN-FORCER are completely installed and secured, apply a bead of exterior rated caulk around
pipe on exterior of building, (See Diagram M).
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DIAGRAM J
DIAGRAM K
DIAGRAM I