SASH BALANCE SPRINGS

Rebate sash for standard foot. Secure foot at Stage 2. Details shown are for grooved outer frame

Rebate stile for horn channel prior to installing sashes. Use at least two No.6 or No.8 x 16mm long countersink screws

2. FIXING BALANCES

Fit sashes to outer frame. Insert balance in groove with sash lowered. For equal sashes, shorter balances are for top sash, longer balances are for bottom sash. For other than equal sashes, details will be shown on the picking slip sent with the balances

Fix balances to outer frame, tight up to header. Use No.8 x 30 long (min.) countersink screws.

Raise sashes to a convenient position and secure standard foot to bottom rail using No.6 or No.8 x 16 long (min.) pan head screws. Ensure that spiral rod is located between the sides of the foot.

For horn channels, ensure that spiral rod is located between sides of the foot and then insert foot into channel. Foot can be bent slightly to create an interference fit.

3. ADJUSTING STANDARD & HEAVY DUTY BALANCES

A. Prop bottom sash in its highest position. Thread spiral rod upwards into balance until it reaches the bottom of the sash.

B. Insert winding tool into the hole at the end of the spiral rod. Without allowing the winding tool to rotate, pull the spiral rod up and down approximately 100 to 200mm. If the spiral rod does not return to the bottom of the sash, add an additional turn or two anti-clockwise until it does. Now, again holding the winding tool so that it cannot unwind, pull the spiral rod down to a convenient position 100 to 150mm below the bottom of the sash and add adjustment turns anti-clockwise as per picking slip or adjustment chart.

C. Engage cross pin into foot. (see arrow)

D. Repeat for other side of bottom sash.

E. Raise and lower the sash. The sash should operate evenly. If the sash falls from its highest position or operates downwards harder than upwards, add or take off a turn or two as required. Repeat the above operations for the top sash.

4. ADJUSTING LITE LIFT BALANCES

Support the bottom sash in its highest position. Pull spiral rod down past balance foot using either the winding tool inserted into the hole at the end of the rod, or a loop of wire attached to the cross pin. Engage cross pin into the claws of the balance foot. Repeat for the other side of the sash. Remove support and operate sash up and down a few times, being careful not to over-extend the balances because travel limit stops have not been fitted at this stage.

Raise and lower sash. Sash should operate evenly. If sash falls from highest position or operates downwards harder than upwards add or take off a turn or two as necessary. Repeat preceding operations for top sash.