Paul from SWISCO responded:
December 21, 2015
Without more information I can't confirm if the S400-20 is a match, but if you have a non-tilt window and a 3/8" diameter balance tube, then it's certainly the best place to start. As for brackets, see our 17-030 or 17-031. These are commonly used with the Series 400 spiral balance.
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Paul from SWISCO responded:
December 22, 2015
Looks like you have a builder's grade window, which means the sash won't be removable. However, we do have a possible solution.
With someone helping you, you will need to drop the new balance in from the top of the sash, screw it in at the top, then let the spiral drop down. You will then raise the sash and, while someone holds the sash in the open position, spin the spiral up to the bottom of the sash. Finally, with our 75-004 tool, give the balance about three turns to charge it and lock it to the end into the sash clip. For the color tip, consider the Red Tip option. Two S400-20 balanced with this option can carry a sash weight of 8 through 21 pounds. |
Tom from SWISCO responded:
December 30, 2015
When you said it won't completely close, do you mean that it closed all the way and then drifted up, or that it simply wouldn't go past that last inch? If it drifted up, then the spring might be too strong. If it simply wouldn't close, then the balance may not be long enough.
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Paul from SWISCO responded:
January 4, 2016
Thanks for clarifying. If I were you, I would try to move the installation hole down, or order a longer rod like Tom mentioned. For the tension, you need to wind the spiral before locking it to the window.
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