Tom from SWISCO responded:
November 21, 2016
Thanks for posting! All the information you have seems to match up, though the stamp option rating is a little weird. I would go by the weight of the sash, just to be 100% sure that you're getting the right strength spring. That's always a safe bet, especially since you're not sure that your contractor installed the right hardware.
As for the balances not being in sync with the sash, there could be a couple reasons why this is happening. The first thing that comes to mind is the possibility of a damaged top sash guide. I recommend watching the videos below for more clarification on how these balances are supposed to work. |