EFCO Special Purpose Windows Installation - Manual (Page 22)

EFCO CORPORATION 3/5/2014 PART NO. YW40 Page 5 of 10
Window Installation Instructions - Hung Window Installation Section -
Side Load Sash and Balance Removal
for Block and Tackle Balances
Completely read the General Installation Instructions and all other sections which pertain
to your project before starting work. These recommendations are for general erection
procedures only. For actual job conditions, see the details on the shop drawings. For
perimeter anchor types and spacing, refer to the approved shop drawings or consult the
project design professional.
Removal of lower sash and balance
1. Remove the sash stop at the head of the window.
2. Pull the bottom of the spring clip outward.
3. Raise the sash until the balance slides under the spring clip.
4. Lift the sash 2 or 3 inches above the balance. Move the sash right
or left as far as possible. Then swing the opposite side of the sash
toward the interior.
5. Remove the balance by pressing downward on the balance, moving
it out from under the spring clip. Relax the tension and remove the
terminal clip from the square hole in the window jamb.
Caution
Balances can be under
extreme tension.
Removal of upper sash and balance
1. Lower the upper sash to expose the spring clip and pull the bottom
of the clip outward.
2. S-670 only – Move the dust stops toward the center of the window
by depressing the button on the bottom of the meeting rail, then
slide the dust stop. (Do not remove screw in bottom of dust stop.)
S-675 or 676 only – Remove both dust stops by removing two
screws from each.
3. Repeat steps 3 to 5 indicated in removal of the lower sash and
balance procedure.
S-670 dust stop as
viewed from the interior
S-670 dust stop as viewed
from the bottom
Bottom guide
Terminal clip
attached to the
window frame
Spring clip in
sash removal
position
(Clip stops the
balance
allowing the
sash to be
lifted off.)
Sash
Spring clip shown in
operating position.
(May be located under
the sash stop.)
Balance
retainer
Sash in
operating
position
(Balance
moves up
and down
with the
vent)