Sure, I'll do my best to clarify this term.
In short, charging a spiral balance is when you wind the spiral rod in place to allow the spring to build up tension. This is necessary during the installation process for just about all spiral balances.
The easiest way to do this is to use a special tool made for this express purpose. Specifically our 75-006 for tilt windows or 75-005 for non tilt. You connect these to the prongs at the bottom tip of the balance and turn the crank, which tightens and strengthens the balance.
A few turns will get it strong enough for your sash. We recommend 3-4 to start out, and if it's still a little weak after that then give it 1-2 more.
I'll include a video below for you to review. This should clarify matters for you.
