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Sealing and fastening the window (continued) – Pella 808F0105 User Manual

Page 5

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3F

F. Place shims approximately 5" up from the bottom of

window to plumb and square the window. Check for

squareness by making sure the diagonal measurement

from corner to corner is within 1/16" in both directions. Also

place shims in line with the jamb hole near the center of the

unit. Trim shims back so they recessed back 1/4” - 1/2” from

the interior face of the window frame.

For windows over 53" tall: Place two additional shims along

each side of the window, evenly spacing them between the

top and bottom shims and the midpoint shim.

G. Check the new sill to confirm it is flat and level using a level

or straight edge along the exterior edge of the new sill. If

the sill is bowed (humped) screen fit issues may result.

3I

EXTERIOR

3G

Note: To Resolve Sill Bow (hump):

• Push Down on the center of the sill to seat the adjustable

sill adapter.

• Check the shims at the sill for proper location. (See Step

2B).

• If the sill adapter is touching the existing (old) sill, remove

the sill adapter to relieve pressure on the new sill.

H. Cut the checkrail band at each jamb and remove. Check

jambs for straightness by measuring the top, middle and

bottom of the frame. Widths should be within 1/16".

Designer Series only: After cutting the checkrail band, push

the remaining tails of the band into the jambliner hole.

I. Adjust the screw jacks if required. With a flat blade

screwdriver turn clockwise to move the frame toward the

sash.

Architect Series Units: The jamb jack holes are located in the

interior balance channel near the checkrail; the lower sash

must be tilted in to adjust the jamb jack.
Note: If the frame and sash are too tight and are

not adjustable using the jamb jacks, the window is

over-shimmed.

J. Finish driving the top installation screws through the wood

frame jamb, ensuring the head of the screw is flush with the

surface of the wood frame to avoid interference with the

balance assembly.

K. Raise the bottom sash to install the lower two installation

screws. Drive the installation screws below the surface of the

wood frame.

Architect Series Units: The lower installation holes are located in the interior balance

channel near the sill. These holes are not pre-drilled through the wood frame. Drive

the installation screws through the wood frame jamb, ensuring the head of the screw is

below the surface of the wood frame to avoid interference with the balance assembly.

L. Check window operation. Open and close the window a few times to check for proper

operation. Make sure the window will tilt correctly.

Designer Series Only: After adjustments are completed, install plastic plugs in the jamb

liner holes.
Note: If there are any problems with the operation of the window, recheck the shim

locations and adjust for plumb and square.

3

SEALING AND FASTENING THE WINDOW (CONTINUED)