NOTE:
Do not let indoor-air collar extend down into duct. It
MUST be flush with top of duct trunk. If collar does not fit
properly, minor adjustments may have to be made to collar.
8. Use Flex-Mend or equivalent RTV caulk to seal bottom
board to outdoor-air plenum.
WARNING:
Non-foil-type tapes will not withstand the
temperature of heated air from unit and may be a fire
hazard. Failure to tape joint will allow heated or cooled
air to leak beneath home. A failure to follow this warning
could result in a fire or explosion, and personal injury or
death.
V.
INSTALL UNIT
A.
Setting Unit
CAUTION:
Do not move unit on an unprotected floor.
Damage to floor will result.
1. If necessary, use an appliance dolly to position unit into
enclosure, being careful not to disturb foam seal on tem-
plate. When unit’s front edge is in line with front edge of
base template, set unit upright onto base template. (See Fig.
11.)
CAUTION:
Only minor movement is allowed when
aligning holes in unit base with holes in template to
prevent damage to foam air seal.
2. Remove front grille of unit (if necessary) as shown in Fig.
12 and make minor adjustments in location of unit if
necessary to align screw holes in bottom rail of unit with
screw holes in base template.
3. The unit should be secured permanently to structure by
driving 2 wood screws through mating holes in bottom rail
of unit and base template into floor. Tighten screws flush to
foam seal. Overtightening screws will tip unit forward on
foam seal. Do NOT use any other procedure to permanently
secure unit to structure.
4. Cover unit top as shown in Fig. 12. Cut a hole with a
diameter of approximately 15 in. through ceiling and roof
directly over outdoor-air exhaust. If hole in roof and ceiling
cannot be aligned directly over each other, a small bend in
the flexible duct may be required. Acceptable misalignment
of hole in ceiling and transition is a maximum of 2 in. per
each 12 in. of flex duct in elevation, up to a maximum of 6
in.
5. Seal any opening with mastic to prevent loss of conditioned
air into attic space.
B.
Exhaust Air Venting
1. Apply a generous amount of mastic to roof surface and
around hole cut for outdoor-air duct to pass through. (See
Fig. 13.) Lower duct down through hole in roof and ceiling
and fasten flashing to roof with screws.
2. Apply additional mastic or sealant around flashing perim-
eter base to provide protection against rainwater leaking
under flashing.
Fig. 11—Setting Unit on Base Template
A95347
NOTE:
TILT UNIT APPROXIMATELY 45° WHILE MOVING IT
INTO PLACE TO AVOID DISTORTION OF FOAM SEAL.
BASE TEMPLATE
Fig. 12—Securing Unit to Floor
A95348
WOOD SCREWS
NOTE: SCREW HOLES IN BOTTOM RAIL OF UNIT MUST
ALIGN WITH HOLES IN METAL BASE TEMPLATE.
TEMPORARILY COVER HOLE
WHILE THE 15-IN. CUTOUT IN
THE CEILING AND ROOF
ARE BEING MADE
Fig. 13—Outdoor-Air Duct Installation
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APPLY MASTIC TO
SEAL ROOF CAP
TO ROOF
15-IN. DIAMETER
HOLE
ROOF
CEILING
—5—
